Chinese Journal of Catalysis

Chinese Journal of Catalysis ›› 2011, Vol. 32 ›› Issue (5): 723-726.DOI: 10.1016/S1872-2067(10)60193-3

• Research Briefing • Previous Articles     Next Articles

Silanized Titanium Silicate (TS-1) Molecular Sieve for Promoting the Homogeneously Catalyzed Oxidation of Cyclohexane

WANG Deqiang1,2, ZHANG Yibo1,2, XIAO Dehai1, YANG Xiangguang1,*   

  1. 1State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, Jilin, China; 2Graduate University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2010-11-15 Revised:2010-12-29 Online:2011-05-31 Published:2014-09-29

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Abstract: The promoting effect of titanium silicate (TS-1) molecular sieve and silylanized TS-1 (TS-1-S) on the homogeneous liquid oxidation of cyclohexane catalyzed by cobalt naphthenate (Co-nap) with oxygen as oxidant was investigated. Both TS-1 zeolites were efficient promoters. The conversion of cyclohexane was 7.9% with a selectivity of 83.7% when it was catalyzed by Co-nap/TS-1-S, and the reaction time was reduced to 130 min as compared to 300 min with Co-nap as the catalyst. The adsorption of Co-nap on TS-1-S, which transformed a homogeneous reaction into a “quasi-heterogeneous” reaction, was the reason for the better catalytic performance.

Key words: titanium silicate sieve, cyclohexane, homogeneous oxidation, adsorption, silylation