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Received October 14, 2008
Accepted November 27, 2008
articles This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
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Oxidation of cyclopentene catalyzed by tungsten-substituted molybdophosphoric acids

Faculty of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, 212013, P. R. China
Korean Journal of Chemical Engineering, May 2009, 26(3), 654-659(6), 10.1007/s11814-009-0109-7
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Abstract

A series of Keggin type tungsten-substituted molybdophosphoric acids (H3PMo12-nWnO40·XH2O) were synthesized and characterized by ICP-AES, FT-IR, TG-DSC, and XRD. The tungsten substitution extent significantly affected their catalytic activity in the oxidation of cyclopentene and the selectivity of the resultant products. The tungsten-substituted molybdophosphoric acids with tungsten substitution numbers in a range of 3-6.8 exhibited high catalytic activity in the oxidation of cyclopentene. After reaction for 8 h, the conversion of cyclopentene was up to 97%; the oxidation products mainly consisted of glutaraldehyde, cis-1,2-cyclopentanediol and trans-1,2-cyclopentanediol with the yields of ca. 23%, 27%, and 45%, respectively.

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