Depolymerization of paraldehyde catalyzed by some silica- and alumina-​based binary oxide catalysts

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Walvekar, S.P. and Halgeri, A.B. (1972) Depolymerization of paraldehyde catalyzed by some silica- and alumina-​based binary oxide catalysts. Journal of the Research Institute for Catalysis, Hokkaido University, 20 (3). pp. 219-224. ISSN 0034-530X

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Official URL: http://hdl.handle.net/2115/24945

Abstract

Depolymerization of paraldehyde in C6H6 solns. is catalyzed by oxides supported on Al2O3 and SiO2. The acidity with pKa ≤-​3.0 is linearly related with catalytic activity (1st order rate const. k) for depolymerization of paraldehyde. Supported MoO3, WO3, and V2O5 have acid sites at pKa ≤-​3.0 and are catalytically active. Supported MgO, BeO, and ThO2 have very little acid strength at pKa ≤-​3.0 but have of weak acid sites at pKa ≤+3.3; these relatively weak acid sites are catalytically inactive. The obsd. rate consts. of SiO2-​supported catalysts are greater than those of the Al2O3 supported catalysts. The activation energies are inversely proportional to the acidity of the catalysts.

Item Type: Article
Subjects: Faculty of Science > Environmental and Biological Sciences > Zoology
Divisions: Jnana Bharathi / Central College Campus > Department of Zoology
Depositing User: Ms. Sathyavathi N
Date Deposited: 20 Sep 2016 06:46
Last Modified: 20 Sep 2016 06:46
URI: http://eprints-bangaloreuniversity.in/id/eprint/5836

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