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Isomerisation of 1,2‐Epoxyalkanes: Effect of Different Solid Acids on Product Distribution, Mechanism and Kinetics
Author(s) -
Yadav G. D.,
Satoskar D. V.
Publication year - 1997
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/(sici)1097-4660(199708)69:4<438::aid-jctb725>3.0.co;2-g
Subject(s) - aldehyde , isomerization , chemistry , catalysis , product distribution , allylic rearrangement , kinetics , phosphoric acid , selectivity , aldol reaction , furan , organic chemistry , physics , quantum mechanics
The rearrangement of epoxides over acidic and superacidic catalysts leads to several products with selectivity to the desired aldehyde depending upon the nature of the catalyst surface and the reaction conditions. This paper reports the studies with 1,2‐epoxyoctane as a model compound, over several catalysts such as sulphated zirconia and zeolites, and dodecatungstophosphoric acid, phosphoric acid and ZnCl 2 supported on silica, clay and carbon. The typical products of rearrangement are aldehyde, allylic alcohols, furan and aldol. A mechanism for the formation of these species is given. H 3 PO 4 /SiO 2 , dodecatungstophosphoric acid supported on K‐10 clay and ZSM‐5 were found to be efficient under different conditions. A kinetic model is presented. © 1997 SCI.