SCIENTIFIC ABSTRACT ZHDANOV, S.P. - ZHDANOV, V.

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• Publication Date: December 31, 1967
• Content Type: SCIENTIFIC ABSTRACT

20-544/54
AUTHORt Zhdanov~ S,P
TITLE% The,Adsorption of Water on Quartz which was Ground In a Vacuum
(Adsorbtsiya Yody na k4artse, droblennom v vakuume)
PERIODICALs Doklady Akademii Nauk SSSR, 1957, Vol- 115f Nr 5, PP- 938-941
(USSR)
ABSTRAM It is a known fact ~-that under ordinary conditions the surfaces
of.silica particles, no matter whether in a crystalline or amor-
phous state, is hydrated and has OH groups which are valence-
connected with the surface atoms of the silicon. In the case of
adsorption investigations carried out in SiO 2 j amore or less
hydrated surface is therefore found to exist. A more or less
complete surfa8e dehydration can be attained only by annealing
at .1100 1200 , which, in turng may not only considerably modi-
fy the surface structure, but May also lead to a complete dis-
appearance of the developed interior surface. In the present
paper the results of investigations, as mentioned in the title,
which were obtained by the grinding of low-temperature W -quartz
in a vacuum aredealt with; further, the adsorption properties
Card 1/3 of the SIO surfaces obtained at various conditions are compar-
2

20-544/54
The Adsorption of Water on Quartz,whiah was Oround in a Vacuum
ed in relation to steam. The presence of charges of unsaturated
valences on the surface of the of~-quartz crushed
in the vacuum forms one of the basic properties of this surface,
by which structure it is distinguished from the surface structure
of silica obtained by annealinR. Probably the high activity of
the said surface with respect to the adsorption of polar water
molecules is.in connoetion with just this property. It even ex-
ceeds the activity of a most highly hydrated hydrophile quartz
surface (curve 1, fig. 2). As, however, may be seen from a com-
parison of.the isotherms I and 4 (fig. 2) the surface unit ac-
tivity of Ote-quartz at low vapor stresses only little surpasses
the activity of a hydrated surface. This indicates that the
numbers of primary a sorption centers per surface unit are In
both cases very close to each other. A considerable increase of
adsorption With increasing steam pressure is in the former case
already at the first initial section of the isotherm in connect-
ion with the overlapping by chemical absorption which wascaused
by hydration. The formation of charges on freshly formed mica
surfaces,on the' occasion of its being crushed in a vacuum was
Card 2/3 observed by Obreimov. There are 3 figures and 6 Slavia references.

7 -----AUTH,OR-i Zhdanov, S., P, 76-32-3-32/43
TITLE: Disousiions (Diskulssiya), On~ the Part Playel by the
&r
Surfa6e~ o'4L.Gioups of Porous Glass in the Adsiorp-
tion of Water (K voprosu o roli poverkhnoetnykh gicLrok=
silinykh grupp poristogo stekla v adsorbteii vody),
On the Occasion of Some Remarks Given in the Artiali by
V. L. Nikitinp-A. N. Sidorov and A. V. Karyakin
(Po povodu nekotor'ykh vyvcdov~ adelannykh v statlya
V. A.1likitinai A._N..Sidorove i A V. Karyakina)
PERIODICALt Zhurnal'Fizicheskoy Khimii, 1958, Vol
32, Nr 5..
pp 699,~-706 (USSR)
4BSTRACT: ater adsorption on porous
It was:determined that the w
glass depends 'on the temperature of the preceeding anneam
lin of the adsorbent in a vacuum. Zhe most intensive d0w
crease.in adsorption was oboervedAn annealings in the tem-
'Peratlire inter'sial of 3oo.-560"Ic where the most intensive
separation of.wateralso takes place', whereas at higher
temperatures,,the nature of the adsorption isotherms chan-
Card 1/4 ges. These and other observations lead to the assumptiox~z

Discussions. On the Part Played by the Surface 76-32
H XY
Ydro 1 Groups of.Porous-Glass in the Adsorption
of Water.-'On the Occasion-of Son'e.Remarks Given
in the Article by V.:A4 Nikitin, A. H. Sidorov and A, V. Karyakirt
that the adsorbing capacity is to be~sought In connection
with the -hydroxyl groups at the surface, that a decrease in
onds.to a debydratiore. V~
adsorpiion consequently corresp
The resul+s'of investigation are agreement with the
dafa of infraredl:spe.:~tra of the valence oscillati*ns ofthe
OH-gro 'ups accordin Ig to N. G. Yaroslavakiy (References,5-7),
The resulfs of later investigations~and those by the author
mentioned in the title (Referen e are in contrast,witb
the above-mentioned assumptions,,which is apparently due
to an insufficient interpretation of the spef;tral bands.
The examinations lead to the coneltiston that
up to 20oll- separation of the adsorbed water takes pla,~-)
and that above2oooC the, structural water is separatei,
:Thus Shapiro and Weins .(Reference 12) in the reactIon of
d1borane with surfa~-,P. hydroxyl groupa of silica gel, notice,,I
'Cara,2/4 that at temperatures above 1500C in a vacuum pnly a forma-

-Played by the Surface Hydroxyl 76-32-3-32/43
Discussions. On the Part
~Groups of Porous., Glass in the Adsorptlion*of Water, On the
occasion of Some Remarks,Given in the Article by V. A. Rikitin,-
-A, N~,Sidorov and'I.N.-Karyakin
tion ot.water from structure hydroxyl groups can take
place. A%table of the quantity of hydroxyl7m2 of the,
M 2 surface, at different annealing temperatures is given.
Explanations in connection with the spectrum and formulae
of structure are given* On the basis of the perforMed cons,
siderations and observations of.diagrams a surface struce,
ture is assumed in which every water molecule in the ada
s9rption is connected with two hydroxyl groups. By this
oonoelt, Ithe above-mentioned differences of the results',
can beexplained, In this connection the change and not
the.' do=imw of the surface is empGaized.
Mere are 4 figures.and 15 references, 12 of which are
Soviet,
ASSOCILTIONt Akademiya nauk 3831~ Institut khimii silikatov,,
Leningrad,
(LeningradfAS:USSR)Institute of =altte CbAms~s`.Iry)
Card 3/4

5,(4) sov/20-'123-4-40/53
AUTHOR: Zhdanovt S. P.
TITLE: On the Dehydration and.Rehydration of the Surface of Quartz
(0 degidratainii i regidratataii poverkhnosti kvartba)
~PERIODICAL: Doklady,Akadsiaii nduk SSSR, 1 -719,
958, Vol 123, Nr 4, pli 716
:(USSR).
ABSTRACT: The present paper deals with the dehydration of pulverulent
opaque qu -ar m2/g)
tz(s -,.5.4 m2/g) and rock cryatal (a -; 0.58,
as~also with the rehydration of the suifacelof roakcrystal
after annealing-at 11500- The uthor compared the'adnorptioni
xim
properties of -the initial.(maximum hydrated), of the ma

r
dehydrated~and of the :rehydrated surfaces of rock c
y8
~

tal with respectAo the adsorption of:steam. Carrying o
ut/
of measurements is described in short. The aplantus for Yhe
investigation of dehydration also permitted qualitative :de-
termination of the hydrogen separated during annealing.-IiA
diagram shows the. curves for the dehydration of quartz sa p es
of Maximum hydrated surface. The quantity of water separated
by~annealing varies in the case of different quartz,samples
within very wide limits. (Howeverl by the annealing 9f.silioa
'
Card 1/3 structural water content varien only very little).
gelthe

SOY/2o-123-4-;40/53
On the Dehydration and,11ohydration of the Surface of Quartz
The aforementioned 4ifferences in the quantity of separated
.water cannot.be due to differences in the.degree of_hydration
of the surface'of the quartz samples. A posuible existence of
Iree (molecular) water in the quartz crystals is not quite
impossible. This water may accumulato.in very fine cracks
or may be otherwise adsorbed or it may be present in the
crystal latticeits'elf in form of a oolid:solution. Thus, the
steep'rie,e of the,dehydration curves in the temperature inter-
val of,100-200. may be due to the,separation of the water
irreversibly adsorbed in very fine cracks of molecular di-
,mensions.-Purther.possibilities of explaining the course
taken by these curves are diecussed..According to the results
of the present paper the quantity of hydroxides occurring on
the quartz sur'fado can be derived only with great caution
from the-data'on thermal dehydration. Ptirther investigations
of the hore.discussed phenomena appear advisable.' The author
thanks M. H. Dubinin and A. V. Kiselev for the interest they
displayed in this work, and To. V. Koromalldi for hasisting,-
him in carrying out measurements.* There are 3 figures and
Card 2/3 8 references, 5 of which are Soviet.

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4UTHORi Zhdanov$ SO,P.
. . . ..........

TITLEt ...,
The-Reversibie~Isbthermal Lines of the Adsorption of Water
on Quartz (Obratimyye izotermy adsorbtaii Yody na.kvartse)
PERIODICALt boklady,Akademii nauk SSSR, '1958, Vol- 120, Nr 1, pp.
10
103, 6 (USSR),
ABSTUM Ihe adsorption-of steam on quartz was investigated among
others in 3-previous papers (Refs 1-3) by the authors. The
isothermal lines determined for the adsorption of:water.
are shown in a diagram in this paper. Although'the adsorption
waslin all 3 cases related to the unit of quartz surface
the isothermal, lines differ substantially beginning,with
considerably high values of the relative pressure p/p.0
The present paper reports on the results of the investigation
of the,adsorption~of steam on 4 samples of different quartz'
powders with.different,:apooifio surface and of different
origin. Three of,the samples were produced by crushing.rock
crystal of different origin with subsequent treatment of the
powder with HOi4 he fourthl finest powder was produced of
Card 1/3 crystals of unpolarized quartz. The specific surfaces were

~The Reversible Isothermal Lines~of the SOV/20-120-1-27/63
Adsorption of Water,on quartz
produced according to,Br nauer# Emmett and Teller from 'the
u
isothermal lines~ of the adsorption of nitrogen, argon.and
methylalcohole The isothermal lines of the adsorption of
-,steam determined,by the volume method arg oompiled in a.table.
All these isothermal lines are reversiblel with one single
exception# The.,properties of the surface change neither vary
by heating.nor by'the first adsorption. Various details are'
discussed. The properties of the unit area of various quartz
samples and also of other silica adsoribents car-be identical
respect.to the adsorption.of.water only when the
,adsorption takes place on an extremely hydratized surface.
In the presence of an irroversible,adoorption the properties
..ofthe unit area can not ba compared to one another. Finally
the author thanksM. M. Dubinin and A. V. Kiselev for their
interest in this Paperg and Te. V. Koromalldi for his joining
in the measurements. There are 2 figures, 1 table, and 1U
references, 12 of which are Soviet.
ASSOCIATIM Institut
khimii silikatov Akademii nauk SSSR (Institute
Card 2/3 of Si.Licate Chemistry AS MIA)

5(4) s,ov/62-59-2-28/40.
AUTHORt -,Zhdanov,
TITLE: On the Separation.of Hydrogen in the Process of quart a
zCalcin.-
tion (0 vy.delenii vodoroda pri prokalivanii kyartsa)
PERIODICAL: Izvestiya Akademii nauk SSSR, Otdoleniye khimicheskikh nauk,
.1959, fir. 2, ~pp 352-354 (US31t)
ABSTRAMI~ In the present news in brief the author reports on the investi-
gation of the
hydrogen separated on the calcination of quartz.
,
It was found that the hydroxyl grouppoccurring on the q artz
surfabe are able'L L to dissociate at temperatures above 500
Lhydrogen,being formed. In contrast with quartz, no separation
of hydrogen could be found on the calcination of silica gel
KSK-2.,WaterWasLalso formed-if only sporadic hydroxyls f ar-
distant from one another were left on the surface. Probably the
separation of WaterLunder these conditions is possible in con-
sequence of a proton migration. In the case of quartz such a
proton migration is apparently complicated owing to the hard
structure of the crystal surface. The author expressed his
gratitude to E. K. Keler for his interest in this investiga-
Card 1/2 tion. There:are Ifigure and 3references, I of which 'a Soviet-

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62-59-4-9142
AUTHORS: Zhdanov,.S. P.,.Koromalldi, Ye. V.
TITLEt. On Structural Peculiarities.of Sodium Boron Silicate Glasses
Chemical Resis
Related- to,,Their,: tance(O atrukturnykh
natriyevoborosilikatnykh atekol Y avyazi a ikh
khimicheokoy ustoyohivostlyu). communication 1. Investigation of
the Chemical'Resistance of Some Low-alkali Sodium Boron Silicate
Glasses and of the Structure of Their Lixiviation Products
.(Soobohoheniye.-I Iosledovaniye khimichaskoy ustoychivostl
-nekotorykh maloshchelochnykh natriyevoborooilikatnykh atekol'i
9.truktury produktov'ikh vy.s.hohelachivaniya)
PERIODICAL: Izvestiya Akademii nauk SSSR. Otdeleniye kh1micheskikh nauk,
1959,, Nr.41,pp_-626-636,(USSR)
ABSTRACTs IIn the present work the structure of the porous products obtained
by a treatment.of. low-alkalilsodium, boron silicate glasses' with
hydrochloric aoid'has been investigated. The dissolving rate of
the,glase domponente'owing to.the selective solubility of the
-glass was determined for similar samples. From the results ob-
a relationship e
betwe n the chemical resistance of these':
.''Card 1/4 ~glasses and the structure of their lixiviation producto hadbeen

On~Structural:Poculiarities of Sodium Boron Silicate Glaosen Related to.Their
'Chemical Resistance., Communication I . Investigation of the Chemical Resistance
_,~of , Some Low-alkali Sodiuw Boron Silicate Glasses and of the Structure of Their
-Lixiviation Products
discovered and the..dependence of the chemical resistance on the
composition~and heatitreatment has been clarified. Three batches
with equal~SiO conten and vary
of glass. - to of 60%, 65Ao and 70%
2
ing N 0 contents.from b-4% were investigated. The addition of
"'2
smaller amounts of soaium oxide to alkali-free glasses increases.
initially the chemical reoistance, which is strongly reduced,
however,~',by afurther increase,in Na 0 content. This has been
observed w -ith all gle's se6 investigatid. Among hardened glannes,
those contsihing,2% 114 0have the highest re6istance.(Fig 1).
.Annealed glasses have ihe highent chemical reuiBtance at 3% 11& 0.-
2
.'An increase in alkali.oxide content (up to 2-3%) does not.only
:retard the lixiviation but in some cases even reducesthe limit-
i.ng amounts of B20, and Na20 entering into solution (Tables 1
and 2, Fig 2). During an analysis of the results of the ab-
Card 2/4 sorption investigation the overall shape of the isotherms

~SOV/62-59-4-9/42
On Structural Peculiarities of Sodium Boron Silicate Glasses Related~to Their
''Chemical Resistance. Communication 1. Investigation 'of the Chemical,Resistanm
of Some Low-alkali Sodium Boron Silicate Glasses and of the Structure of Their
Lixiviation Products
(Figs I and 4) permits already the conclusion that thq!.porous,
glasses very widely in structure. Numerical results are given in
table~,3- Adscirption,isothermehaving a wide hysteresis loopare
characteristic of glasses containing 1~ and, p.articularly,.2%
Na, 0. These structures can be considered transitional between
2
iotherms of glaoses containing
from fine-porous to coarse-porous
is of &nnealed glasses (Pig 0
;eriatice. A displaz.-ement of the
in of a higher P/ps is character-
iled Clasuca. The authors ap-
Professor E. K. Keler. There 'are
erenaes, 13 of which are Soviet~

SOY/62-59-4-9/42
On Structuralleculiaritiee of Sodium Boron Silicate Glasses Related to Their
Chemical Resistance. Communication 1. Investigation of the Chemical Resistance
of Sbme-Low-alkali Sodium Boron Silicate Glasses and of the Structure of Their
Lixiviation, Products
ASSOGIATIM. jnstitut'khimii~silikatov Akademii nauk SSSR (institute Of
Silicate Chemistry of the Academy of Sciencev~ USSR)

AUTHORS: .Zhdanov, S, Po,-Koromalidi. Ye. V. SOV/62-59-~-8/40
TliLE On tIhe Structural* Chara6te I ristiIas of Sodium Bar Ion Silicate
M_ ---s- Associated, Vith Their ChomicaloStability (0 struktu=4kh
osobennostyakh natriyevpborosilikatnykh stekol v.svyazi a ikh
khimicheskoy'us.toychivostlyu). Communication 2. On the Cwasps
of the Great Changes of Chemical Stability of Sodium Boran
Silicate Glas'ses'.Depending on the Com~osition and Their Merual
History (Soobshcheniye, 2. 0 prichinakh rezkikh izmenariy 11diia-4-
:_cheskoy,ustoychivosti natriyevoborosilikatn v
~6 ial
kb atekol v s
.
at sostava i ikh-termicheskoy i,tcri,~
.,PERIODICAL: Izvestiya Akademii.-nauk 335R.' Otdeleniya khimicheakiYJi nauk)
Pp 811 618 -088R)

ABSTRAM In the previous-comm'u;n"iciition the auth6re carried out the in-
vestigations mentioned in the titls,~!.with weakly alkaline so
dium'boron silicate glass6s only' and,but a general evaluation
of the results obtained without a comparison with other invest-
igations iesults was given. The comparison is carried out in
the prosentle6mmunicationj moreover,-additional experimental
investigations'of sodium boron silicate glasses with a high i3o-
Card 1/3 dium. oxide content are carried out. The dependence ofthe ia-

On the Structural.cheract.eriaties of Sodium Boron SOV/62~-5915-8/40
Silicate -Glasses Asswidtbd.vith Their Chemical
Stabilityo~Communication:2_.,On the Causes of the.Great Changes of Chemical
Stability.of Sodium Boron Silicate Glasses Dependin6 on the Composition and.
Their Thermal Ilistory
ective.solubility of sodium boron
'creaseof the a el silicate glas-
see on the porosity,of the leached layer was used in the deter-
minatfon of thel,chemicalstability-of *the glasses, i.s. the in-.
crease of a-porous-film is measured, which is formed by the ef-
feet of.acids and by the selective solubility of, the individxal
components of,the glass,in the.acidal this is usedas measure
ment of.stability. Per this.reason the quantity of B 0 and
2 3 1
Ra O'which is formed at the beginning of the H01 effect de-
pending on the size.of the radius of the pores of the leached
layer (Table 1) is measured for variously manufuatured Slaas
tempered and annealed), as well as the variation ofthe ra-
ius of the pores.depinding on the Na 0 content of the initial
d
2
'glass (Table 2)1 moreover,the -increase of thicknass of the po-
~rous film of opdles,6ent and transparent glasses of the same
composition is'determined as well as the iaothermal.line of ad-.
Card 2/3 Isorption--Idf ethanol on porous glass surfaces:. L11,investigatioas

6n,Ae Structural Characteristics of lodium.~Boron BOV/621-59-.5-8/40
Silicate Glaases. Aszodata&'vith Their Chemical
_Stability._Qommunica#on'2. On the Causes of the Great Changes of Chemical
'Stability'of Sodium Boron Silicate:Glasses Depending on,the Composition. and
~Their Thermal History
.~showthat the chemical Otability of the glasses investigated
depends neither on the variously strong or weak solubili.ty of
the glass components contained-by them nor on the diffusion
~ralte.: of the reaction. -leached layer, thelatter
_producta.in the .
depending oii the dimensions-of the pores of this layer. The
chemical stAbi1ity:',: of the.glasses investigatedl which varies
considerably with.th change,of,.their-oomposition and thermal
e
~r'eatment, is directly,related to the structural charge of.the
porous products which areformed with the acid treatment of
2 tables, and 17 2~eferences~
15~-of which;are.Soviet'.
ASSOCILTION: :Institut khimii pilikatov-Akademii,nauk SSSR (Institute of
~Silicate Chemistry of the Academy of Sciences, USSR)
SUBMITTED: July 9, 1957

sovl62-59-6-9136
AUTHORs Zhdanov S'

TITLE: On Structural Peculiarities of Sodium Borosilicate Glasse--
Associatied With'~ Their Chemical Stability (0 strukturnykh oso-
bennostyakh natriyevoborosilikatnykh stekol Y avyazi elikh khimi-
cheskoy ustoychivootlyu)*,Communication 3- Structurallrans-
formations~in Sodium Borosilicate Glasses (SoobshcheniYe 3-
Strukturnyye prevrashcheniya v natriyevoborosilikatnykh steklakh)
:PERIODICAL: Izv.estiya Akademii nauk SSSR..Otdoleniye khimicheskikh nauk,
'6# pp 1611 1018 (USSR)
19590.Nr
'ABSTRACTs In a previoue'paper,(Ref:1) it has been shown that the 'chemical
stability of glasses is closely connected with the qualit.i 9
of :the.porous surface layer of the glasses, which porosity i:
caused by~leaohing out. On the other:hand, the qualilidq~of
the porous atructuroof this layer depend on chemical and struc-
tural variations
thatocour in the glass, and may be caused
'
by different thermal treatment. In this connection the varia-
tion in the structure of glass as a re-sult of thermal treatment,
thus transformation of the crystals into orystallitse and dis-1
orientation of the oryotallites were investigated, Because of
Card 113 the roentgenographically observed small growth of the crystal

On'Struotural Peculiaritiew.of Sodium Borosilicate SOV/62-59-6-9/36;~
Glasses Associated. - With Their Chemical Stability. Communication 3. Struc-
~tural Transformations in Sodium Boroeilicate Glasses
dimensions the.transformation of the glasses when 'being
leached out was not ascribed to this factor. Thus also the
-transformation ofthe trivalent into tetravalent boron was
~taken into account. Here the formation of polar groups
L-B~- 0' Ila and their associationto borate complexest and
2 )4
furthermore achange in the numberof these complexes and in
their dimensiono as well as in.their distribution in the glass.,
and with respect to each other could be observed. Also some.
properties-of the sodium borosilicate glasses are listed, which
in a very.complicated way influence the dependence of the struc-
tural~cha.ngea on'the composition and the treatment of these
glasses. The present paper was compiled from ublioatio.no
dealing.with,the,subject concerned (Refs 2-29~. Finallyt the
authorthanke Be K. Keler for having read the manuscript and
discussed it with,:him. There are 2 figures-and 29 referencesp
.22 of~which are Soviet.
ASSOCIATIONt Institut khimii eilikatov Akademii nauk SSSR(Institutq of Che-
Card 2/3, mistry of Silicates of the Academy of 'Sciencest USSR)

.30M
81/081/61/000/019/045/085
B1.10/BIOI
'AUTHORt Midanov; S. P*
----------
TITLEs Ohanges'in the, structure of glasses containing B 0
213
P.ERIODICALt Roferativuyy. zhurnal. Xhimiyaj ;io. 199 19619 308j abstract
'19K 49 (Bb. ~"Btekloobrazn. sostoyan2
2 e No L. I AN SSSRt
1960 592 50TI,'PIekua4 522
~524
The peculiar change in the chemical stableness of low-alkali
sodium boro-silioate.~glassss in explained~by partioularities.of their,
submiaroinhomogenoous structure and by,formation of isolated barate
ranges completely surrounded-by:SiO . When explaining the causes of the
irregularities one has to-consider got only the obanoe in the coordination
state of the boron but alsothe inconstancy of the properties of the bo-
ron oxide-totrahodrons ih.the glasoosand the changes in the submioroin-
homogeneous structure of these glasses.[ Abstracter's notet. Complete
translation*3
Card 1/1

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B103/B208
AUTHO RSi Zhdanov S ~-P and Buntarl, No N.
TITLEs
Investigation.of the formation conditions.of sodium
zeolites in.loi-temperature hydrothermal synthesis
PERIODICAL., Doklady Akademii nauk SSSRt v. 1389 no. 1.1 1961, 119-122
TEXTs:. The-authors studied the formation conditions of crystalline alumino-,
silicates -from stronglyalkaline alumino-silica gels -with an O/Al 0
"2 2 3
ratio~of between 4 and 6. The,SiO content in the gels fluctuated from
.16
1 to n -10..'Until quite recentlk, the production conditions of
n
'.iynthetio,zeolites.known as Linda's molecular sieves A and X have been
until,R. M-Barrer et.,al.,(Ref- 5) published data on this subject.
-I re arded as important, eino
The subject of this paper a a 1) the results
_bf Barrer are thus completed, 2T.the increased alkalinity in an optimum.
one-for the:crystallization of artificial zeolite (Linde-sieve 13 X), but
_its~formation conditions are not yet clarified In publications. The gels
..were preparedby intense mixing of alkaline solutions of sodium aluminate
Card I/T

3/020/61/138/001/017/023
Investigation of the formation conditions..0 B103/B208
and sodium.sil,icate which were obtained from NaOH,.amorphous'SiO 2' NaAlO,
band Al(OH) of different degrees of purity. The solution was completely-
3
homogenized until the gel was formed (generally 30-40 sea after mixing).::.
.,Synthesis was performed 4t 70-2000C. At temperatures up to 1000C,glass
flaskdl*ere used, at higher temperatures stainless steel autoolaves.
The,approximately.170 produot.9-whioh resulted differed with respect to gel
composition, temperature and,duration of crystallization. Debye powder
patterns were used for phase analysis, recorded on an X-ray ionization
..apparatus. Chemical analyeis:was carried out in the laboratory of
'Professor Yu. V. Moraohevskiy. Further, the adsorptive power of typical
zoolite samples was studied.. The diagram constructed on the basis of the
results (Fig. 1) shows the formation ranges of the resultant zeolites.
The ratio -,k was' plottedion.the x-axis, i.e.t the,ratio of the number
m
of. SiO moles in Ahe gel. to the, number of exoess Na 0 moles, per mole of
2
Al D In the range 70 - 2000C, at least five alumino-silicates were
2 3
:obt.alined.from highly alkaline gels (44m.46)t A fi (B)t (V), r (G),
p,
Card 2/7

S/02OJ61/138/001/017/023
~Investigation of the formation oonditions.. B,103/B208
and A D) the three latter belong to the sodium zeolites. It is
'Concluded from the conf6r"mity of'the i~terplanar spacings (Fig. 2) and.from
.:t~6 adsorptive power, that G,and~Dare identical~with the Linde zeolites
J reen ) 13 X ''.d ~4 A.- It may. be seen from Fig. I that at high
molecular so B an
fexcessive.alkallnlt~'tkpe A is only'formed at low*values of k (0.20 -0-70)
(70- 900C). Vith-the low alkalinity used in this oasep the low S102
concentrations in the gel'(n uland 2) are moat favorable for its forma.-
-tibn 'Zeolite X was repeatedly obtained by the authors at 700C and at.k
between 0-75:a'nd 1.33.~ At high6r,tempe'-ratures (900C), X does not
.,crystalliz.e, but is formed together with the product V.' The latter shows
a Debye powder 'dtterfi.deviating,from that of-A and X, has a considerable
p
'adsorptive- ower,with respect to.mater.and oan.release iton heating
withoiii desMcti'on'"of its. dir'' Y te
ystd lattice. V is certainly also a zeoli
and may,be identical with-lzeolite P-de'sor'ibed by Barrer (Ref., 4). Its
oompositi.on c6rr~sp6nds to the foimula 0,94 Na O-Al 0 *3.52 SiO *4.55 H 0.
2 ~2 3 2 2
Its optimum.-foimation conditions lie,at 90-12010 and at 1.334ke.4. Fig. 3
shows the adsorption isothermallines on the prepared zeolites which had
previously been -heated in vacuo up.to 2000C. The authors found that V is
able to adsorb.the water vapor'in a high and selective degree. The
Card 3/7

S1020V61.11 38/001/017/023
Investigation of the formation conqi~ions..,. B103 B208
+ 2+
calcium form of.,.V, obtained by. -ion: exchange (73%Na replaced by Ca
hirdly differe~trom' the sodiu'm form with respect to adsorptive porer which
*bill still-hhve to be bxplained. Between 150 and 2000C basic nosean and
analaime (products, A.,and B,, Fig, 1) are formed,.almQot exclusively. Nonean
is oryst,allized-,mainly from gels,with higher alkalinity (with low k-values).
A and-B are frequently formed together. Under the given conditions, A,:X,
and V may be rJecrystallized during the synthesis forming another crystalline
Phaie, togive gels whose composition lies in the range of the formation of
the individual,zeolites.. On prolonged standing, transitions; A--+X,
X---~V, V .-),analoime, are possible._The authors think it necessary to a-Ludy
the eubJect further.. V. A. Kostrova took part in this work. There are
3 fi es an'd'8~referenoesv 2 Soviit-bloo and.16 non-Soviet-bloo. The
gur
three~most recent.referenoes to English-language publications read as
follows: Ro A..Labine,'(W- 3-t .Chem. tng. 66, no., 16, 1959), R. M. Barrer,
J. W. 'Baynham et, 'al. (Ref,, 5.3 J- Chelt.-Soo., 1959, 195), L. Broussard,
P. Shoemaker~(Ref. 61 J. Am. Chem. Boo., 82,,.10 1t 1960
4
ASSOCIATIOXi. Inatitut khimii silikatov Akademii na'uk SSSR (Institute of
ences USSR)
Silicate Chemistry of the Academy of Sci
Card 4/7

1009 B/022V671/138/004/018/023
B1 03/11203
'AUTHORS:~ Zhdanovv S P' and-Koromalldi, Ye.
----------
TITLE.~ -Selective sorption. on poirous.fflasses
P.ERIODICA-L 'Akademiya nauk SSSR. Dok 1 aay v. 138 no* 4, 19619 870-873
TEXT: The authors had shown earlier (Ref. I:Izv.AN SSSRvOKhN,1959,No-4,
626, 14o.5,811,1959; Ref. 2: S. P. Zhdanov, Diseartation,Inst.khim.
silikatov (Institute of.Silicate Chemistry) L.,1959) and in the present
paper that selective sorption is not only a specific feature of porous
crystals (zeolit.es) but is also characteristic of some porous glasses.
These glasses may act astypical molecular screens, They are produced by
Jixiviation.of two'-component alkali silicate- or alkali borosilicate
glasses by acid solutions. The authors thank Yu.~A. Shmidt for supplying
most of tbe.pln- opecimens. Before sorptiony they were heated in vacuo
to 100 or 200 VC. The authors studied the sorption of CH OH and C H OH,
3 4 9
.and that of C R OH. They conclude from the absorbed quantities of water
2 5
and-CH OH having small molecules that they are absorbed much more strongly
3
Card, -1 A

2,W57
S/020/61/138/004/018/p23
Selective sorption on porous glasses B103/B203
~than the .1arge.molecules of C H OHp of the hydrocarbonet and particularly
2 5
of C H OH. ~-Thereforef-seleotive sorption by porous glass is due to very
4 9
fine pores in the.glass whose diameter is comparable to the size of simple
molecules. Since glasses no. 1 anV 3 readily abagrb water (molecular
out
diameter d . 2.8 R)-but no nitrogen (d.. ab 4 X) the authors suppose
a diameter of:pores In the glass between 2.8 and 4 ~. Glass no., 2 has
larger pores but they are also so fine that m�st of them remain
inaccessible to comparatively small (d W 5-8 ) molecules of C H OH and
4 9
Of C alkanese, The authors compare the formation of uniform and fine
5
pores in glass with the "cages" and oanale in zeolite crystals where they
are, formed by de4dration under heating. In the glasses, however, the
oxygen,packing is,.so dense that not only the "cages" occupied by alkaline
oations but also the free "cages" of the silicon oxygen lattice in the
31ass remain inaccessible even to so small molecules as those of water.
The lixiviation~process starts with the exchange of alkali cations by
acid protons:
Si-O Ha+ -Si OH + Na
glass solution
glass solution
Card 2/4

24057
8/020 6 1 ~1,38/004/018/023.
Selective sorption on porous glasses B103/ 20
~-With a sufficiently k~gh .. coInt on t of;~ SiOj.,4n tho,_glq.os, thelixiviation
.with acids will neither destroy n'or transform the Si- 0- Si bonds in the
Si- O.lattios. The1ormation offine canals in the glass cannot be
explained in this way either They are formed by'lixivistion of large
alkali ions and-roplaosment ~y the-muoh smaller protons, The pore volume
.increases with the ion radius of the alkali cation and with the content of
alkali oxide in the glass which.the authors take.as a proof of the above
thesis. On the other hand, t)Ze SLore volumes determined frotr(_the sorption
isotherms of water'-prove to be.twice to Vhre-e_tImqe larger than the total
volume;_"of ,the.,,cati one --lixiviat ed fromlithq glass,.--. ?he authors explain this
not only by the fact --thekt the cavity left by,-the.,liXiviated cation in,the
glass must always be,~A,arger than Ihs -oation itself.o, The secondary water
synthesis from adjaoent~lhydroxyle.formed.'aft~er the.roplacement of irregu-
larly scattered alkali cations by.prot.ons plays a more important part.
The..water,thue formed in the glass at low Aemperatures remains in the glass,
isf,howeverp-separated out on evacuation of the,porous glass already at
room temperature. -A certain additional volume of the pores becomes,free
by carrying al~ong jart 'of the oxygen in the glass. Porous glasses capable
of selective sor"ption.are inferior to porous crystals (teolites) with
c ard7 5/4

S/080/62/035/007/0,12/013
D202/D307
ITTROR: Zhdanov,S.P.,
T I TLZ. The.. low temperature dehydration of silica-hydra-tes
"hu r-nal priklad m1i v. 35 no. 7 1062,
noy khi
1620-1621
TaXT: -The author.'discusses the possibility of dehydratingi
crystalline and erlass-forming alkaline si icates by leaching in acid
eratures. is formed
,solutions at low terip .1hile crystalline H2Si20.5
from crystalline sodium disilicate, the same propess leads to the
formation of amornhous products from sodium glasses: Na20.2SiO2,
The amount oi! water in H 0.5 deter-
Na20 3S102 xnd.' a,0.45'02- 2S12
mined by heating in the range 100-9000C corresponds to the theoreti--,
cal , 'out those in the above leached glasses were markedly lower
than the calculated values. This is ascribed to a previous pdrtia.Li
-dehydration a- low temperature. During this kind ofiprocess water
could be synthesized f roM oxygen of the glass silica lattice, which
Card 1/2,

,-- O,i,~ , f ,- 0
-1 , - I -
. . V-
- z - i

Synthetie'Zeolitear(Cont-Y SOV/62,46,
Andronikashviliq T. G9$ and.Ahi D. SabelLshvili. Gas
65
~Abiorption,ChromatograPhY On Synthetio Zoolites
A~an o L. 3 Yastrebovaj. Ye. V. Korama
S jP ~e 0 i'di.
a * Mol oular Si 4 a
us- see as, e e e ~68
Dobyehin,.D. P.,.T. M., Burkat, N. N. Kiseleva. Porous,
Absorbents.,of the Molecular Sieve Type 75
3)ubinin M Mi The.Composition of Cubic Octahedral
:--Structural Units:of:Synthetia.Zeolites
AleskoVokiyi'. B. V. The.. -Possibility of, Obtaining Ab-
sorbents of.the~Moleoular Sieve Typ6-of Leaching- 91
Mirskiyp Ya. V.,,.and M.I..MLtrofanove, Adsorption of
High
~Hydrodarbon.Vapors by Synthetic Zeolites at
.
Temperatures, '94
C.Ard 52~W

-----------
310761621036100910111011
B101IB102
Aunw: Z, hn dartnov, S
TITLE. '.The proble of adsorptive 3roperties and hydration of the
quartz_, surface
:PE111WICAL: Zhurnal f izicneskoy k-hiEnii, v. 36, no. 1962t 2098 2102
TUT; Tv*:~ papors by .4- 14. To r)rnv If.' F. Kiselev,,and K. G. Kra-Zillnikov
(Zh. f 1z. khimii, 35,' 2031, 2234, .1961).on dif.erences in the adsor-itive
propert-4e.,i of quartz and in the degrea of hydration of variouc quartz
s n r,,, v.) I e za~, f 'U'scii-ined- Their.cono.lusions,are c6nsidered to 'm Incorrect.
The . expi-rimental, di4ta, however, can be explained by i wine the prosent
uthor'-s-nr-jumption of nn-irrogular ultraporosity of -the quartz s3lr,.,~103
a
(Dokl,. AN SS-SR, 120, 1~58; :5b. "Polucheniye-, struktitm 1 svoystva
Sorbentuvll(in the "Production Structure ~_Lnd Properties of Gorbentz
Collectlon) Gookhi,-,,i7.d at'l 959 The revIersible i5otherris for wa-ter ad-
sorp.tion can b6-converted toa sin;zle isothermal line by multiplication
'~icie t;, this 13othorical Une is well described Inv a !~:LT equT.-
wit~ a~ coef, n
in Ihe, rnngre.of a,relativc pressure variation p/P botyvocn 0.025 and
Card 1 "1

3/076/62/036/009/011/'Oll
:.The. problem. of adsorptive ... B101/B102
0 here
T
re 2 figures and I table.
a
ASSOCIATION. Institut khimii silikatov AN SSSR(Institute of Ziilic,-A~
'Aa U

Ch SSA),
emistry,
SUBMITTIo: March 2 -1 -
0-969
q
Card -2/2
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,3 (n2Cv-
cr
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c~L,.y'Jenzene F,,-!atA-r
C.,d 1/2

suB COEE: CII, FL
DATE AC'~:
10 F=?- S07
Card 2/2

V, 1 11 Ir -- I-- -'. - , , . ~

I
- - - - - . - - . . - i. - . I . -

ACCESS-'~)N \R: AID3003226
sod-',= -boros
Card 4,

ACCESSION ?,M.: A?3003226
--I e ~ - - I - , I- - - .
Card 3/3

.. .1v
6
ACCESSION 'NR: AP4041751- S/0980/64/037/007/1442/144
AUTHORS: Yantrebova', L's P
S.; Zhdanov So"'
TITLE:' Investigation o the'lixiviation-products of hiGhly
iliceous alkali silicate,glasses
-khfiuii;# 371 no
SO(JRCE: Zhurnal pri adn oy 7, 1964, 144~-'14
~'TOPIC TAGS: 'alkali silicate assi structure,' lixiviated alk&
silicate glass'. pore s ze, pore volumel sodium silicate glasss-
potassium silicate-glass,-dehydrationt chen)~cal stability,
absorptive property, water adsorption, metfihnol adso tion
rp
f th
ji~Ci
ABSTRACT: The structure o e viation products-of two. and
three. component alkali silicate glasses of the composition S102 871'
R~ Mol%. r (R - Kror Na),was-examined. Na/X31 Na/11 +-K/21
0 13
2 h
N513400 and K/13,glasses were leached wit 1N HG1 at 50C to
form porous'- products :entirely of very rinepores Which
Will adsorb water aes*r''.
r m6lecules-but.are too small for methanol moled
penetrate* Curves forr
the dehy ration of these glasses 'in
a -20-800G. .'The lixiviation
ir were drawn for temperatures from
ducto,of,the
~potaesium-eilicate glasses are much more..porous
4.5
V~:

iACCESSICV. NR.: AP4041791

than those of the aoditim:silicite glasses; their pore volume

d dimenaione-are greater,~*The potassium'silicate glasses
an pore
-'are less~ stable chemically;* this property-depends primarily on
-the structure of the.porous-layer formed by.lixiviation$ which
in :turn depends on the com position'and,structure of the initial
glass... The obtained resul to are explained by the' substitution.' "
of the alkali glass cations bythe acid,protona.during lixiviatio,
-
Orige art, has'. 3 figured -,and,l
table
'
ASSOCIA
TION:,None

TED 30Au69,: i'-! ENCLI'OO
SUMIT

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i,SUB CODES
("HER: 001
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07 61
-~-----ACC-NRi-AP602701fl--------- U 1002076611 ~76
30 RGE CODEt_TJR
.~'MTHORs, . Zhdanov. S. Novikov, B.
ORG: Inm
S 105 04 Qjemis&M ot Si gates Im. 1, V. Grobonshchikqx,, M SSSR (Institut
khimiisillkatov AN SSSR)
TITLE: Synthetic,.arionites.and their adsorptionlproporties with rospect to water
vapors
SOURCE: ANSSSR- Doklady, v. 166, no- 5, i966l 3-107-M0
TOPIC TAGS:., -adsorption,. water vapor, zeolite, chemical synthesis, chemical compositiozi~4
chemical reaction, cation, reaction rate, r"cti!on temperature
ABSTRACT: Eri6nito, a rare natural iso3ite' .1 was pievi6usly successfully
synthesiiod by one of the authors (S. P, ZHDAMV, Izv. JUJ SSSR, Ser, Xhim,
No. 6, ~ 1965) from' al1caline Na-P vilica-alumim gels at 1000C # Compared with a'
Sio2tA'203 ratio of 6for natural arionites, this ratio for synthetio
erionitoo varios,from 7to 7*4* Isotherms of water adsorption are presented.'
:as a function of,changes in thochamical composition of erionito (removal of
cations, formation of hydro-VIs, decompositlorr of NH4+ and dehydra:qlization)
owing to docationization, dealuminization and heat treatment. Adsorption of
water on the original cation formi of erionite is independent of heating
-temporaturo ilithin tho Investigatod lUdta (up to 80000, wharoas adsorption
~on dealuminized specimens decreases with increasing temperatures Converselyt
adsorption of.the g94-fdrm oonsiderab)y increases with increasing temperature.'
Those differenoes,may be assooiatod vith the differenoeo in tho paok1ng
'density of the molocules of the adsorbed watorin the cavities in suoh casess-
paper van preoented-by Academician V. H. Dubinin on'17*Jiine 196 The authors
thank. Ye. N. Tearova for carrying out the analvais. /2pns , 36845F
SUB 00 E, 07 SUEH DATEs 28jun65 ORIG fW 1 005 OrH Ws 008
Card UL 549.T7

ZHD-ANOV-.S-sP-- -- p .- p F
KISELEV- A.V*j IZGIN V.I,j OVSEPYAH MfYe.; TITOVA, T.I.

M.
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L 11867-!~66 EWT(m)/9WP(e)/E1?1P(b)
ACC MR: AT6000478
0511dif
SOURCE CODE: UR/0000/651000/000/0122/0126
AUMOR: Zh a- S P - Yastrebovn,_L, Koromal'di Ye. V.; Khvoshchevx S. S.
ORG: None
TITLE*'*' Structure of the silicon.'oxygett framework of alkali metal silicate
glasses as determined by-atudies-,of'produtts of their leaching
SOURCE% VILOJOY'ut-4-0 - sovethshanAlq_M_q_t~ckloobraznomu aostpyaniyu. 4th,
Ltii;~-a-d~1964*,.Atekloobta~znoyo~-.so~itayantya (Vitrecus statay--,-ir~1~67;ovesh-
aniya, Uiningrad lid;-vo-~Niuka, 1965, 122-126
-ch
1 TOPIC TAGS: silicate glasal glass property
ABSTRACT: Acid,leaching of.alkali'metal qilieA~~aa~
sea has shown thnt porous
''lass
as
the,pores.of whLch-.4kreidue to the removal of alkali metal cations are al-
ways formed. The.Wstence-ofa definite relationship between the elkalt metal
6xide-content in the initial glass and the volume and size of the pores indicates
that Si-O-Si bonds are not broken or rearranted during the leaching. Disilicic
acid to formed by a simple substitution of H Iions for Na+ Lone:
VNa4 + Ht -71 - oil + Na'
Card 1/2 c
rystal solution cr stal solution

L 11867-66
ACC NR: AT6060478
the silicon-oxygen network remaining unaltered (as shown by x-ray diffraction
spectra). The proposed scheme of the leaching process is consisLont with the
concept of their homogeneous structure. It in postulated that in inhomogeneaus
sodium silicate glagses with a low Hs20 content the regiono of prt-ferential
localization of - fi - TR+ bonds are not Reparnted by vilLca interInvers 6"It
linked to one another, since such Interlayers would block tho learhing of -3u(-h
inhomogeneous glasses. Orig. art. has: 5 figures and 2 tab!-ea.
SUB CoDS: Pf, 07 SUBM DATE: 2214ay65 ORIG REP: 007
r
jw
Card 2/2