Conclusions
-
1.
When mixtures of isopropanol with various esters and alkyl halides are passed over aluminum oxide at 190–270°, there can be a rapid exchange of alkyl radicals.
-
2.
A substantial acceleration of the catalytic dehydration of i-C3H7OH over A12O3 by additions of small quantities of oxalic ester and certain alkyl halides was detected. This accelerating action depends upon the nature of the alkyl radical and passes through a maximum at known temperatures and known concentrations of the accelerating substances.
-
3.
A mechanism was proposed to explain the accelerating action of oxalates, in which the process is accomplished through a series of successive stages, occurring on the surface of A12O3 and catalyzed by it. Isopropanol exchanges a hydrocarbon radical with the oxalate, forming (i-C3H7OOC)2, which breaks down on A12O3 into C3H6 and (COOH)2. In the presence of oxalic acid on A12O3, there is a unique surface chain reaction of dehydration of i-C3H7OH through the formation and catalytic decomposition of (i-C3H7OOC)2. As a result, the dehydration process proceeds along a more profitable pathway.
-
4.
It is hypothesized that under definite conditions there can also be a direct radical initiation of the catalytic dehydration of i-C3H7OH.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
Literature cited
V. É. Vasserberg, A. A. Balandin, and T. V. Georgievskaya, DAN SSSR,134, 371 (1960).
V. É. Vasserberg, A. A. Balandin, and T. V. Georgievskaya, DAN SSSR,140, 859, 1110 (1961).
V. É. Vasserberg, Collection: The Profound Mechanism of Heterogeneous Catalytic Reactions (Problems of Kinetics and Catalysis) [in Russian], Vol. 12, “Nauka” (1968), p. 229.
M. E. Vinfil'd, Collection: Catalysis in the Petrochemical Industry [in Russian], Vol. 2, Gostekhteoretizdat (1964), p. 149.
V. É. Vasserberg, Kinetika i Kataliz,3, 556 (1962).
A. N. Kost, Collection: General Manual of Organic Chemistry [Russian translation], “Mir” (1965), p. 389.
G. Jewel and J. Butts, J. Amer. Chem. Soc.,53, 35 (1931).
R. Backer and G. Homan, Recueil Trav. Chim. Pays-Bas,58, 1053 (1939).
G. V. Isagulyants, A. A. Balandin, E. I. Popov, and Yu. I. Derbentsev, ZhFKh,38, 20 (1964).
B. N. Dolgov, Catalysis in Organic Chemistry [inRussian], Second Edition, “Khimiya,” Moscow-Leningrad (1965), p. 435.
F. Salmon-Legagneurs, In: Traité de Chimie Organique, by V. Grignard, Vol. 9, Masson, Paris (1939), p. 170.
G. Karabatsos, J. Corbett, and K. Krummel, J. Organ. Chem.,30, No. 3, 689 (1965).
V. É. Vasserberg, A. A. Balandin, and I. R. Davydova, Kinetika i Kataliz,2, 773 (1961).
V. É. Vasserberg, G. I. Levi, and T. V. Georgievskaya, Collection: Methods of Investigating Catalysts [in Russian], Vol. 2, Novosibirsk (1965), p. 124.
Author information
Authors and Affiliations
Additional information
Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 9, pp. 2000–2007, September, 1968.
The article is published on the basis of a resolution of the Conference of Editors-in-Chief of the Journals of the Academy of Sciences of the USSR of July 12, 1962 as the dissertation work of. V. N. Rozanov.
Rights and permissions
About this article
Cite this article
Rozanov, V.N., Vasserberg, V.É. Acceleration of the catalytic dehydration of isopropanol on aluminum oxide by addition of extraneous substances. Russ Chem Bull 17, 1907–1912 (1968). https://doi.org/10.1007/BF00904981
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF00904981