SCIENTIFIC ABSTRACT BOGDANOVA, O.K. - BOGDANOVA, V.A.

• Document Type: CREST
• Collection: Scientific Abstracts
• Document Number (FOIA) /ESDN (CREST): CIA-RDP86-00513R000205910009-5
• Release Decision: RIF
• Original Classification: S
• Document Page Count: 100
• Document Creation Date: November 2, 2016
• Document Release Date: June 9, 2000
• Sequence Number: 9
• Publication Date: December 31, 1967
• Content Type: SCIENCEAB

S/595/60/00Q/Oco/ucq/O1k
Catalytic dehydrogenation ... B134/E,1185
conversion to isoprene. Results with mixtures obtained by
dehydrogonation of isopentane over an Al-Cr catalyst wore 3i-,il~Ar
to those with synthetic mixtures. Full analysis shoiiing cff~,,ct
of flow rate and temperature is given. The degree of converf-.ioa
decreases with increasing flow rate. The Acinetics of the
reaction were investigated in the 530 to 580"C ran~,e witli a
steam dilution ratio of 1:2 and hourly flow rates of 5200 to
7000 g/litre catalyst/1-tour. Reaction rate is given by cquation of
the following type
dx [.41 IA.,]-FZ3 [&I
The adsorption coefficients z were determined experimentally by
measuring the rate of dehydrogenation of binary m�xtures of t1ne
starting material and the reaction products and i-.,erc calculated
from
Card 3/
ZI
(2)

Catalytic dehydrogenation ... E13VE435
where ino - number of mols of reaction product for feed olf pure
starting material; m - number of mols of reaction product for
feed of mixture; p - percent of reacting material in initial
mixture. The hydrogen adsorption coefficients rcmained c(,nstant
at. 0-83- The isoprene adsorption coefficients dropped froln 5.7 to
2.8 (z2) between 530 and 5800C. The reaction rates were
calculated using the adsorption coefficients and the plot of log K
against the-reciprocal of the absolute teniperature gave a str-ight
line. 'The activation energy was calculated as 23300 calories/
molecule. The mixtures used in the tests were produced in tile
laboratory of Academician B.A.Kazanskiy and Corresponding Me.-I")-or
N.I.Shuykin. There are 3 figures, 4 tables and 6 references:
2,Soviet-bloc and 4 non-Soviet-bloc. The four references to
English language publications read as follows: Ref-3: US Patent
2440471, 1948; C.A.42, 54 4, 1948; Ref.4: US Patent 21142319, 194"";;
C.A.42, 61o6, 1948; Ref-5: Grosse A., Morell J.C., 1,11avity J.14.
Industr. Eftgng. Chem. 32, 309, 1940; Ref.6: 'Mavity J.'M..
Zetterholm E.E. Trans. Ain. Inst. Chem. Engn., 110, 19411, 1173.
Card- 4/$

S/595/6o/uoo/oce/oio/ol4
E075/9435
AUTHORS: nalandin, A.A. , Paryqhnikovi, T.P.
TITLE: Dehydrogenation kinetics of ethyl benzene to styrene
and isopropyl benzene to a-methylstyreno
SOURCE: VsesoyuAoye soveshchaniye po khimicheskoy
pererabotke neftyany1ch uglevodorodov v poluprodukty
d1ya sinteza volokort i plasticheskildi mass. Baku, 1957.
Daku, Izd-vo AN Azerb. SSR, 19GOV 241-247
TEXT: The object of the work is a study of the kiiietic5 of
dehydrogenation of ethyl and isopropyl benzene; it is a
continuation of the authors' investigations on the effect of
molecular structure on dehydrogenation kinetics. The
experimental work was carried out by passage through an
electrically heated glass tube contahing an oxide catalyst on a
screen,
at atmospheric pressure. Dilution ratios of 1:3 to 5-
and 1:2 were used for ethyl and propyl benzene respectively;
the steam was superheated to 3000C. Liquid and gaseous product
fractions were analysed and good agreement between hydrogen and
unsaturated hydrocarbons was found. The kinetics of isopropyl
benzene dehydrogenation were studied at three feed rates in the
Card 1/ 4

Dehydrogenation kinetics'...
temperature range of 500 to 550OCt rate
hydrogen produced. A table of reaction
given. Under identical conditions the
binary mixtures of isopropyl benzene and
a-methylstyrene, were studied to obtain
the catalyst from All-
~ - ~IA
100-
P
S/595/6o/ooo/ooo/oio/u14
B075/E435
being measured by the
product analysis is
dehydrogenation rate of
its reaction product,
adsorption coefficients on
where mo = number of moles reaction product for feed of pure
starting material; m = number of moles reaction product for feed
of mixture; p = % of starting material in mixture.
The relative adsorption coefficient of hydrogen was found to be
0.7 and was independent of temperature, The relative adsorption
coefficient of a-methylstyrene falls with temperature, a table and
graph are given. Plotting the log of the adsorption coefficient
against the reciprocal of the absolute temperature gives-a straight
line. The reaction rate was calculated by using the general
equation for catalytic reactions derived by A.A.Balandin (Ref.2:
Card 2/4

S/595/60/000/000/010/014
Dehydrogenation kinetics 9075/E435
ZhOKh, 1942, 12, i56)
[2,~03(zj_+x3)AjjIg A, ~`2.3- (2)
A,-m
The calculated'reaction rate has boon plotted against the
reciprocal of the absolute temperature-and the points lie on a
straight line. The.activation energy has been calculated as
30.3 Kcals/mol. A series of experiments with catalyst particles
varying in size from 1.5 to 5-mm was carried out; particle size
had no effect on reaction rate, The debydrogenation of ethyl
benzene was studied in the range of 520 to 56o6c. The results
were similar-to those obtained with isopropyl benzene but the
adsorption coefficients and reaction rates were considerably lower.
Figures for product analysis, adsorption coefficients and reaction
rates are given. The higher rates for isopropyl benzene are
considered to be due to the introduction of a mothyl group into
the alpha position. At higher temperatures there is a
considerable increase.in conversion; in the 580 to 6000C range
at rates of 800 to 1000 ml/litre catalyst/hour, yield of styrene
Card- 31to

I S/595/60/000/000/010/014
Dehydrogenation kinettcs ... E075/E435
and methylstyreno reached.70 to 83%, which is near to
equilibrium. This is of considerable practical interest.
Increase of feed rate towardi3 1400 to 2000 ml/litre catalyst/hour
led to a slow decrease.in yield. At these higher temperatures the
reaction rate-plot changes-but the plot of Log K against the
reciprocal of the.absolute temperature still falls on a straight
line of a different slope. The activation energies become 18.8
and'19-5 Kcals for isopropyl and ethyl benzene respectively.
(Abstractor's notai: Steam adsorption was neglected in all
reaction rate calculations.]. 'The dehydrogenation of ethyl
cyclohexane was investigated, The low rate of reaction shows
that in the absence of conjugation, the dehydrogenation of the
side chain is slowed down. There are 5 figures, 4 tal)les and
5 references: 2 Soviet-bloc and 3 non-Soviet-bloc. The
reference to an English language publication reads as follows:
Ref.4: Gilliland E.K. Chem. Eng. News. 23, 129 (1945).
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S/020/60/132/02/27/067
0 0 BO11/BOO2
AUTHORS: B _Qj&.a.JL, Balandin, A. A., Academician, Belomeatnykh, I. P.
Adan
TITLEs Catalytic tion' e\
Dehydrogena Nof Isopropyl Benzen
PERIODICAL: Doklady Akademii nauk SSSR, 1960, Vol. 132, No. 2, pp. 343-345
TEXTs The authors investigated the reaction kinetics and the influence of the
structure of the carbon molecule on the reaction rate of the catalytic dehydro-
genation of isopropyl benzene. The experiments were conducted according to the
continuous method on a mixed-oxide catalyst (Ref 3)~ The substance used for
dilution was water vapor (weight 9roportion of 1;2). Before the reaction, the
water vapor was overheated to 300 . The contents Of C02, unsaturated and satu-
rated hydrocarbon and hydrogen were determined in the gas obtained after -the
reaction. The catalysate was colorless. A far-reaching agreement was observed
between the amount of liberated hydrogen and the developing of-mathylstyrene
(Table 1). For 30 min a mixture of air and water vapor was blown through the
catalyst after each experiment, and thus the activity of the catalyst was
maintained. The kinetics of the above reaction was investigated at 5000-5500
with a passage of 0-42 ml within 3 min. The latter corresponded to a volume
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Catalytic Dehydrogenatlon of Isopropyl Benzene S/020/60/132/02/27/067
B011/BO02
velocity of 800 ml per I I of the catalyst per 1 h. The reaction rate was
determined from the amount of the liberated hydrogen. The contact gas,mainly
consists of hydrogen with 0.5$ to 2.0% of C02, and contains up to 0.4 of
unsaturated, but no saturated hydrocarbons (Table 1). The constants of the
reaction rate were calculated from the obtained data according to Ref. 7 on
the basis of equation (1) in such a way that they can be used under the
conditions of a continuous system. The authors also investigated the rate of
dehydrogenation of binary mixtures of isopropyl benzsnewith a-methyl styrene and
hydrogen. From the results they determined the relative adsorption coefficients
(Z2 and %) of the reaction products. For this purpose they used the formula
given by ef. 8. Table 2 shows the values of these coefficients. Hence Z2 of
ot-methyl styrene is reduced from 3.8 at 5200 to 0-35 at 5500. As regards hyarogen
however, the value of z3 does not change with the temperature and is 0-7. Fig. 1
shows the logarithmic dependence of the reaction rate conBtants on the absolute
reciprocal temperature. The points form a strai ht line. The Arrhenius equation
is observed. The activation energy is 30-3 kcalNole and the pre-exponential
factor lg ko - 6.25. The authors found out that the grain size of the catalyst
(1-5, 3, and 5 mm) is of no effect on the process. The dependence of the yield
of &-methyl styrene on the temperature of the catalyst with various grain sizes
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Catalytic Dehydrogenation of Isopropyl Benzene 5/020/60/132/02/27/067
BO11/BOO2
is illustrated by Fig. 2. The points of these two dependences are lying on the
same curve. Hence the authors concluded that their experiments took place within
the kinetic range. From z2 and z3 the changes of the liberated energy A P, the
heat content Z~R and the entropy ns were calculated in the adsorption dis-
placement from the active centers of dehydrogenation. The degree of the dehydro-
genation of isopropyl benzene increases with rising temperature. At 5800 and
6070, the yield in OC-methyl styrene attains 70-5% and 83%, respectively (Table 1).
G. M. Marukyan is mentioned. There are 2 figures, 2 tables, and 8 references,
4 of which are Soviet.
ASSOCIATION: Institut organicheskoy khimii im. N. D. Zelinskogo Akademii nauk
SSSR (Institute of OrRanic Chemistry imeni N. D. Zelinskiy of the
Academy of Sciences, USSR)
SUBMITTEDt February 8, 1960
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0 vx~
9/020/60/133/03/07/013
B016/BO68
AUTHORS: Balandino A. A., Academician, BoRdanovaq 0. K.,
Shche lova, A. F.
TITLE: Catalytic Dehydrogenation~ of Cyqlohexanol~
PERIODICAL: Doklady Akademii nauk SSSR, 1960, Vol. 133p No. 39
pp. 578 - 580
TEXT: It was shown by the authors in earlier publications (Ref. 1)
that several aliphatic alcohols can be dehydrogenated over a mixed
oxide catalyst without any notice&ble formation of by-products due to
decomposition and dehydration. They showed in this publication that the
same catalyst may be also used to dehydrogenate cyclohexanol. This meth-
od of preparing cyclohexanone is being used in the production of syn-
thetic fibers in which oyolohexanone is applied as a good solvent. Ac-
cording to Ye. V. Tur, S. A. Anisimov, and M. S. Platonov (Ref. 2), the
cyolohexanone yield is up to 25*3% over finely disperse rhenium at
3500C. Benzene, cyclohexane, and other compounds form as by-products.
The cyclohexanone yield over a nickel-aluminum catalyst according to
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Catalytic Dehydrogenation of Cyclohexanol 8/020
,/60/133/03/07/013
B016/BO68
Zelinskiy and Komarevskiy is about 37$ at 3800C, with larger amounts
(about 48$) of benzeneq andq in additiong phenolq cyclohexene, and
polymer products being formed. Moreoverp the authors give data obtained
by German and Japanese researchers. They studied the kinetics of the
mentioned reaction, and determined the relative absorption coefficients,
the reaction rate constants together with the activation energies
(Table 3), the changes in free energy, heat content, and the entropies
found for the adsorptive displacement of the alcohol molecules from the
active dehydrogenation centers by cyclohexanone (Table 2). Finally, the
authors established the conditionaof dehydrogenation which secure high
yields of cyclohexanone. The continuous method was applied for these
experiments. They were carried out in an apparatus described previously
(Ref. 8) and over a similar oxide catalyst sample. The conversion degree
of alcohol in cyclohexanone varies between 16 and 75-0 of theory
(Table 1). The results of further experiments carried out with binary
oyclohexanol - cyclohexanone mixtures (containing 24.6 mole % of the
latter) are shown in Table 2. From these results, it follows that the
relative adsorption coefficient of cyclohexanol is 03.03 at 2810C, and
drops to 0.91, if the temperature is raised to 336 . A logarithmic
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Catalytic DeIhydrogenation of Cyolohexanol 8/020160/133/03/07/013
BO16/BO68
dependence holds between the adsorption coefficient and reciprocal tem-
perature (Fig. 1). It can be seen from Table 2 that the values of the
mentioned coefficients remain unaltered, if the temperature is kept
constant and the raies of passage are varied. From Table 4, it can be
seen that the conversion degree of alcohol increases from 67.9 to 88.2%,
when the temperature is raised from 333 to 3600C and the rate of passage
per hour is increased. There are 2 figures, 4 tables, and 10 references:
7 Soviet and 3 American.
ASSOCIATION: Institut organicheskoy khimii im. N. D. Zelinskogo
Akademii nauk SSSR (Institute of Organic Chemistry
imeni N. D. Zelinskiy of the_.Academy of Sciences-,--US-SR-F
SUBMITTED: March 18, 1960
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S/020/60/133/004/036/04OXX
B016/BO54
AITHORS.- _DpadApova, 0. K., Balandin, A. A., Academician, and
Belomestnykh-, =. P.
TITLEs The Effect of the Conjugation Energy on the Rate of
Catalytic Dehydrogenation of Alkyl-aromatic and Alkyl-
hexahydro-aromatic Hydrocarbons
PERIODICAL: Doklady Akademii nauk SSSR, 1960, Vol. 133, No. 4,
PP. 841-842
TEXT: The authors report on their investigations of the dehydrogenation
of ethyl cyclohexane and isopropyl cyclohexane on mixed oxide catalyst.
They proceeded from the results of a previous paper (Ref. 1) which showed
that ethyl benzene and isopropyl benzene are well dehydrogenated on this
catalyst. The rate constant of the dehydrogenation of isopropyl benzene
with a ramified alkyl radical-ic twice that of ethyl benzene (Table 1).
Apparatus and methods used for the experiment are described in the paper
mentioned (Ref. 1). The amount of catalyst used was 10 ml, the temperature
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The Effect of the Conjugation Energy on the S/020/60/'133/004/036/04OXX
Rate of Catalytic Dehydrogenation of Alkyl- B016/BO54
aromatic and Alkyl-hexahydro-aromatic
Hydrocarbons
was 550 - 6000C, the volume velocity of the hydrocarbon was 1000 ml/l - h
(equal to a rate of travel of 0.5 ml per 3 min). Afer every experiment,
the catalyst was blown through with vapor - air mixture and with air.
Cyclohexane was also used for the experiments; it can, however, not be
dehydrogenated under the above conditions. The dehydrogenation of ethyl
cyclohexane at 5500 was poor ( 1% of vinyl cyclohexane was formed); the
same agplies to isopropyl cyclohexane (2A of isopropylidene cyclohexane).
At 600 C, these yields were 3.8, and 6.7% respectively. At 6000C, methane,
ethane, and unsaturated hydrocarbons were formed by cracking. The authors
conclude from their results that the rate of catalytic dehydrogenation
depends on the structure of the hydrocarbons used, on that of their alkyl
radicals, and mainly on the poasibilit~ of formation of a conjugate bond
with the aromatic ring. The dehydrogenation of the alkyl group of the
hexabydro-aromatic ring is rendered difficult. There are 1 table and 7
references: 5 Soviet, 1 British, and 1 German.
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The Effect of' the Conjugation Energy on the 5/020/60/133/004/036/04OXX
Rate of Catalytic Dehydrogenation of Alkyl- B016/BO54
aromatic and Alkyl-hexahydro-aromatin
Hydrocarbons
ASSOCIATIONz Institut organicheskoy khimii im. N. D. Zelinskogo
Akademii naak SSSR (Institute of Organic Chemistry imeni
N. D. Zelinskiy of the Academy of Sciences USSR)
SUBMITTED: April 13, 1960
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S/020/60/133/006/007/016
B016/BO60
AUTHORS: Shcheglova, A. P., Bogdanova, 0. Balandin, A.-A.,
Academician
TITLE: The Problem of Dehydrogenating Butane?- Butyle 0 Mixtures
on-an Aluminum Chromium Catalyst
PERIODICAL: Doklady Akademii nauk SSSR, 1960, Vol. 133, No. 6,
pp- 1350-1353
TEXT. The present investigation was carried,out in 1950. The catalyst
was supplied by M. N. Marushkin (Ref. 6). The authors wanted to collect
data concerning the kinetics and mechanism of tke dehXdrogenation 7
mentioned in the title. The dehydrogenation rates J- butane and-its
binary mixtures with butylene (Table 2), butadiene, and hydrogen
(Table 3) were measured under optimum conditions. Since butylene and
butadiene are decomposed on this catalyst, the authors measured the
reaction rates in binary mixtures of these hydrocarbons with ethane in
order to determine the degree of decomposition. In fact, ethane occupies,
Card 1/3

The Problem of Dehydrogenating Butane - S/020/60/133/006/007/016
Butylene Mixtures on an Aluminum Chromium B016/BO60
Catalyst
on the active surface, a part equal to butane) but is neither
dehydrogenated nor decomposed. Pigs. 1 and 2 show the decomposition of
butylene and butadiene, respectively, as dependent on temperature.
Experimental results confirmed the assumption previously put forward by
the authors, according to which coal and resins result from the
dehydrogenation mentioned in the title, due to the decomposition of
butylene and, even more, butadienej~Table 3). The authors state in
conclusion that the following reactions take place: 1) dehydrogenation of
butane to butylene; its rate is inhibited by the butylene that is
present in the initial mixture; 2) dehydrogenation of butane and
butylene to butadiene; 3) decomposition of butane; 4) decomposition of
butylene into light hydrocarbons and coal; 5) decomposition of butadiene
into light hydrocarbons, coal, and condensation products. Butadiene
develops in low yields at atmospheric pressure. The catalyst is soon
polluted with coal and requires frequent regeneration. A more selective
dehydrogenation of butane to butylene can be attained (Refs. 1,6) at
lower temperatures. Less light hydrocarbons and coal are thus formed.
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The Problem of Dohydrogenating Butane - S/020/60/133/006/007/016
Butylene Mixtures on an Aluminum Chromium B016/BO60
Catalyst
The authors draw the conclusion that the catalyst used is jpecific for
the dehydrogenation of saturated hydrocarbons (butane). There are 2
figures, 4 tables, and 6 Soviet references.
ASSOCIATION: Inatitut organicheskoy khimii im. N. D. Zelinskogo
Akademii nauk SSSR (Institute of Organic Chemistry imeni
N. D. Zelinskiy of the Academy of Sciences USSR)
SUBMITTED: March 26, 1960
Card 3/3

B994ANVA"S.1-1 ~-Mp L.A,; SHCHEGIAVA., L.P.
Regularities in-the catalytic dehydroge-tion of primary and
secondary alcoho]A. lzv&AN SSSR Otd,kh'manauk no.3:/+25-429 Nr
161. (KLRA 14:4)
L Institut organichoskoy 4imii imeni, N.D.Zelinskogo AN SSSF..
(Dehydragenation) (Alcohols)

KOROTKEVICH., B.S.; SHENDRIK, M.N.) BOGDANOVA, O.K.; SHCHEGLOVA, A.P.;
VINOGRADOVA,, N.P.
Catalytic dehydrogenation of ethylbenzene. Kbim.prom. no.4:243-248
Ap 161. (KERA 14: 4)
(Benzene) (Debydrogenation)

BOGDANOVA, O.K.; SHCHEGLOVA, A.P.; BALAMIN, A.A.; VOZMEMNAYA, I.I,
l'
Catalytic debydrogonation of n-pontenes. Izv.AN SSSR Otd.khi*
nauk no-4:578-582 Ap 161. (NIRA 14:4)
1. Institut organiohesko kbimii im. N.D,,Ze3.inskogo AN SSSR.
(PenteZ (Dehydrogenation)

BOGDAROVA, O.K.; SHCHEGLOVA, A.P.; BAIANDIN, A.A.1 EELOMSTNYKH., I.P.
Cata3,ytic dehydrogenation of ethyl benzene into styrene.
Neftekhimiia 1 no,2.,195-200 Mr-Ap 161. (141M 15:2)
1. Inatitut organicheskoy kbimii AN SSSR im. N.D. Zelin k go.
(Benzene) (Styrene)
(Dehydrogenation)

BALAMIN, A.A... akademik; . BOGDANOVA O.K.. BELONESTNYKH, I.P.
Kinatico of the dehydrogenation of ethyl b;nzene to otyrens, DokI*
ANISSSR 3-38 =0095-597 W 161, (MM 140)
lo Institut organicheskoy Ichimij im, N,D.Zelinakogo AN SSSR.
(Debydrogenation) (Benzene) (Styrene)

25333 8/020/61/138/005/013/025
B103/B215
AUTHORS: Bogdonova, 0. K., Balandin, A. A,., Academician, and
B-e-ro_m_e_sT_ny_k_T,__1. P.
TITLE: Effect of the structure of alkyl-aromatic hydrocarbons on
the kinetics of their dehydrogenation
PERIODICAL: Akademlya nauk SSSR. Doklady, v. 133, no. 5, 1961, 1089-1092
TEXT: The authors explaln the effect of the introduotion of a second
radical into the benzene ring of ethyl toluene on the dehydrogenation rate
of the ethyl radical. They had already proved (Ref. 1: DAN, 132, No. 2,
343 (1960); Ref. 2: DAN, 138, No. 3 (1961)) that isopropyl benzene
(ramified radical) is dehydrogenated faster than etkyl benzene (straight
chain). The experiments were conducted in the apparatus of Ref. 1 by the
same methods. The reaction rate was bromometrically determined b~ the
method of G, D. Gallpern (Ref. 3: Tr. Inst. nefti, 4, 141 (1954) accord-
ing to the amount of vinyl toluere produced. The catalyzate was also
chromaLot~raphi-ially analyzed. A mixture of dinonyl-didecyl sebacates
(Neozone D content 2 ~a) 18 '/"j of which was applied to diatomite bricks
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Effect of the structure of-25313
S/020/61/136/005/013/025
B103/B215
served as liquid phase. The temperature was 524-5600C, the flow rate
1000 MI/1-hr (0-5 ml per 3 min) diluted with H 20 vapor, in the ratio of
1:16 or 1:32. The experiment proceeded far from equilibrium. The amount
of by-products (xylene, toluene) in the catalyzate was low. The contact
gas contained only 0.2-0.4% of olefins and 0.5-0.9 ~o of saturated hydro-
carbons. The relative adsorntion oceffioients were determined by measuring
the rate of dehydrogenation of ethyl toluene - vinyl toluene (21 moles of
vinyl toluene) mixtures, The coefficients z 2 of vinyl toluene drop from
3.8 at 5300C to 1.S at 56000, The function log z 2 =F(I/T) is linear. The
coefficient z3 '0-7 for hydrogen does not change with temperature. The
above kinetic results may be expressed by the Feneral kinetic equation for
monomolecular reactions in the continuous system (A, A. Balandin, Ref. 7:
ZhOKh, 12, 160 (1942)). The dependence of the logarithm of the velocity
constant on the reciprocal absolute temperature is also linear. The
Arrhenius equation is observed. The energy of activation calculated from
these constants is 34.6 kcal/mole and log k0 =7-3~ On the basis of the
adsorption coefficients determined for vinyl toluene on the active surface
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Effect of the structure of... 25313
3/02 61/138/005/013/025
B103Y3215
of the catalyst, the authors calculated the changes in free energy, of
enthalpy and entropy during the adsorptive displacement from the catalytic
surface. The velocity constant of ethyl toluene dehydrogenation
0.731-1.704 at 530-5600C is higher than that of ethyl benzene
0-376_1.058- Hence, the authors conclude that the dehydro.-enation of
~
the ethyl radical is accelera ted by introducing a methyl radical into tile
benzene ring. Since vinyl toluene is an important ra-.N material for the
production of synthetic rubber (copolymer production), perfumes, etc., the
authors studied its dehydrogenati-on on a mixed oxide catalyst at 5800C
and flow rates of 1000, 820, and 570 ml/1-hr. The experiments showed that
the vinyl toluene yield (with respect to the flow of ethyl toluene)
increased from 42.8 to 9;
,6.8 ~- as the velocity of flow decreases. Since
the yields calculated with respect to decomposed ethyl toluene drop from
86.1 to 80.7 '7'a, the authors assume the formation of by--products.
Chromatographical studies showed that the amount of toluene increased
from 0.6 to 1.4 ~b (at 570 ml/1-hr) and that of xylene from 4.3 to 10.8
0.1 % of benzeng wag also formed. The authors therefore conclude that
high yields of vinyl toluene are obtainable at 5800C and a high flow rate
of ethyl toluene on the oxidg catalyst. A- V. Bondarenko is mentioned.
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25M
Effect of the structure of...
S/020/61/1-8/005/013/025
B103/B215
There are 3 figures, 4 tables, and 9 references: 6 Soviet-bloc and
3 non-Soviet-bloc. The two references to English-language publications
read as follows: T. W. Evans (Ref, 8: j.. Chpm, Education, 32, 6 (1955)1
F. G. Buege, (Ref. 9: Ind. and Eng. Chem., 46, 1695 (1954).
SUBMITTED: February 28, 1961
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S/204/62/002/004/002/019
E071/E433
AUTHORS; Bogdanova O.K., Shcheglovat A.P.t Balandin, A.A.
TITLE: catalytic dehydrogenation of the individual isopentenes
into isoprene
PERIODICAL: Neftekhimiya, v.2, no.4, 1962, k42-447
TEXT: Kinetics of dehydrogenat 'ion of isomeric isopentenes into
isoprene on an oxide catalyst in the temperature range 56o.to 6200C
at a volume velocity of about 5 h-l and-dilution with steam' in a
wt ratio of 1:3 were studied. The composition of the products
was determined by the method of gas-liquid chromatography.
Comparison of the obtained data Indicates that an overall degree
of transformation of the individual isomers in the abovementioned,
temperature range varies as followai 2-methylbutene-2 (53.2 to
71.5%) \, 2-niethylbutene-1 (72.8 to 80-16%) > 3-mothylbutene-1 (90 to
92%). From the obtained experimental data the ratio of the
velocity constants of the dehydrogenation reaction for the
individual isomers: 2-methylbutene-2 ;2-methylbutene-1:
3 methylbutene-1 was found to equal 1.44: 1.15: 1-0.
Dehydrogenation of 2-methylbutene-2 proceeds at a higher velocity
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Catalytic dehydrogenation ...
S/204/62/002/004/002/019
E071/E433
than that of the rentaining two isomers. Isomerization of the
starting hydrocarbons with a shift of the double bond occurs
simultaneously with the dehydrogenation reaction. According to
the degree of isomerization the isomers can be placed in the
following order! 3-methylbutene-l,~' 2-methylbutene-l> 2-mathyl-
butene-2. The most stable structure is that of 2-nethylbutere-2
the least stable that of 3-methylbutene-1 with branching in the
saturated part of the molecule. At 580 to 6200C, volume
velocity of about 4.5 to 5.5 litre per litre of catalyst per hour
and a dilution with steam in a ratio of 1 :2.5 to 3 by wt,
the'yields of isoprene amounted to 25 to'41% on passed and
91 to 825'a on reacted isopentenes. There are 3 figures and 3 table-9.
ASSOCIATION:,Institut organicheskoy khimii AN SSSR im.
N.D.Zelinakogo (Institute of Organic Chemistry
AS USSR imeni N.D.Zelinakiy)
Card 2/2

s/2o4/62/OO2/oo4/oO5/Ol9
E071/E433
AUTHORS: Belomestnykh, I.P., Bogdanova, O.K., Balandin, A.A.
TITLE: The influence of the structure of hydrocarbons on the
kinetics of their dehydrogenation
PERIODICAL: Neftekhimiya, v.2, no.4, 1962, 467-472
TEXT: The influence of the structure of hydrocarbon molecules on
the kinetics of their dehydrogenation was studie-d on isopiopyl-
benzene, ethyl, ethyl-, 1-methyl-3-ethyl..;', 1,4-dimethyl-2-ethyl,
n.propyl- and diethylbenzenes, using the same oxide catalyst.
The experiments were carried out in a straight through apparatus,
with dilution of hydrocarbons with steam in a proportion of
1:2 to 3 (by wt), in the temperature range 500 to 560*C with a
volume velocity of 0.8 to 1.0 hour-1 (for diethylbenzene
temperature range 520 to 6200C at feeding rates of 1500, 700, 500
and 300 ml per litre of catalyst per hour). The velocity of
dehydrogenation was determined on the basis of the evolution of
fiydrogen and alkenylbenzene formed. The compositions of
cataly3ates were analysed by the chromatographic method. It was
shown that alkylaromatic hydrocarbons with a branched radical and
with substituents in the ring are dehydrogenated with a high
Card 1/2

S/204/62/002/004/005/019
The influence of the structure ... E071/E433
velocity. Front the experimental data the velocity constants of
the dehydrogenation reaction were calculated for the individual
hydrocarbons and the existence of the logarithmic dependence betwedn
the reaction constant and activation energy was confirmed. Changes
in free energy, heat content and entropy of the adsorption
displacement front active centres of the catalyst were calculated.
It was shown that with the catalyst used the dehydrogenation
products can be obtained with high yields at 565 to 6200C and high
feeding rates: e.g. vinyltoluol can be obtained with a yield per
pass of 43 to 57" (feeding rate 0.5 to 1.0 hour-1),
divinylbenzene with a yield per pass of 30 to 36% + 22 to
201,49 of ethylvinylbenzene (feeding rate 0.5 to 0.7 hour-1).
There are 7 figures and 3 tables.
ASSOCIATION: Institut organicheskoy khimii AN SSSR
im. N.D.Zelinskogo (Institute of Organic Chemistry
AS USSR imeni N.D.Zolinakiy)
Card 2/2

BELOWT11MY I. P.; BOGDANOVA, P. Kj BALANDIN,, A. A.
Effect of the structure of hy*vearbons an their dehydrogenation
kinetics. Neftakhimia 2 no-4i467-472 4-~4 162.
(MIRA 3.5-.10)
1. Institut organichookoy khimii AN SSSR imeni N. D. Zelinskogo.
(Hydrocarbons) (Dahydrogenation)

BOGDANOVA 0. K.; SHCHEGLOVA A. F.; BALANDINg A. A.
.9 1
Catalytic de W rogenation of individual isopentenes to i8o, ne.
Neftekhimia 2 no.4:442-447 JI-Ag 1620 (MIRA 15:107
1. Institut organicheakoy khimii AN SSSR imni, Zelinskogo.
(Butane) (Isoprene)

BOGDANOVAO 0.7.; BAIANDIN, A.A.,akademik; BELaESTNYKH, I.P.
Dehydrogenation kinetics of alkylaromatic hydrocarbons as
dependent on their structuree Dokl. AN SSSR 146 no.6:2327-1330
0 162, (MIRA 15tlO)
(Hydrocarbons) (Dehydrogenation)

S/062/63/0001004/002/022
AUT HOR., Bogdanova, 0. K., Balandin, A.A., and BelcmestrVkh, 1. P.
TITLE: Regularities in the catalytic debyc S~nq~iqpjof lkylarainatio
hydrocarbons
PERIODICALz ldcademiya nauk SSSR. lzvestiya. Otdeleniye khimicheskikh nauk.
r1o 0 4. 1963, 61i-W
TEXT; The regularities fourii in studying the effect of the molecular
structure of al~ylb~nzeneljon the kinetics of their dehydrogenation were examined.
It was fctmd iiLe mol~-c`uia~ structure of hydrocarbons regularly affects the
rate constant, activation kenergy and reaction constant of dehydrogenation and
the thomody=do function of adsorption displacement on an oxide catalyst.
The existence of a logarithmic relationship between the activation energy and
the reaction constant was confirmed. A pa:rallelism exists between the change
of heat content and entropy during the adsorption displacement by the debydrogena-
tion products from the active centers of thecatalyst. There are 5 figures and
2 tables.
N.D. 4"Jc-.'A-,rskk1go
N.D.
-ffi" of is~rlr 'U"'JR,
f;s IJ
Card
-- - --------

L 12aZ-41 EPF(c)1EW(J)1BWT(m)1DDS ASD Pr-h/Pc-).t RMU
ACCESSION NR: AP3002283 S100621631060100610999'1:LO03
6
AUTHOR: Shcheglova, A. P.; Bogdanova, 0. K.; Balandin, A. A.
TITLE: Catalytic de~ F_ enj~a~tior.~:-f=i=so=-eric isopentanes Report 1. Dehydro-
Ydro
genation of 2 et~ylbutene-2
SOURCE: AN SSSR, Izvestiya. Otdeleniya kh imicheskikh nauk , no. 6, ..963, 999-loo3
30KC -TAG S:--prepamtion -of- isoMne,dehydmgenation -rate of i-somerrs
ABS7.ACT: Th#~ object of thia-work is to study the formation rate of 1~! ~rens~~by_
indiviUlual dehyd-ragernation oP isomeric Pelitanes (3-iaathy1butEGne-1_, 2-met?q1butene-1,
and Z_rmethylbute~ne_2) which are obtained through a catalytic deYqdrizenation of
i