期刊
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
卷 414, 期 -, 页码 72-77出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.molcata.2015.12.014
关键词
Dawson-type polyoxometalates; Cyclohexanone; Cyclohexanol; Hydrogen peroxide; Adipic acid
Dawson-type POMs series of formula alpha- and beta-K6P2W18O62 isomers, alpha 1- and alpha 2-K6P2Mo5W13O62 isomers, alpha-K6P2Mo6W12O62 isomer and alpha 1-K7P2Mo5VW12O62 isomer, have been used as catalysts for the liquid phase oxidation of cyclohexanol, cyclohexanone and cyclohexanol/cyclohexanone mixture to form adipic acid in presence of hydrogen peroxide without solvent, without phase-transfer agents and without adding acid. P-31 NMR spectroscopy of different POMs after cyclohexanol oxidation showed the formation of new active species that can be attributed to peroxo-POMox form. An adipic acid yield of 69% was obtained from the oxidation of a mixture of cyclohexanol (50%) and cyclohexanone (50%) with alpha-K6P2Mo6W12O62 isomer. (C) 2016 Published by Elsevier B.V.
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