催化学报

催化学报 ›› 2011, Vol. 32 ›› Issue (5): 723-726.DOI: 10.1016/S1872-2067(10)60193-3

• 研究快讯 • 上一篇    下一篇

硅烷化 TS-1 对环己烷均相氧化反应的促进作用

王德强 1,2, 张一波 1,2, 肖德海 1, 杨向光 1   

  1. 1 中国科学院长春应用化学研究所稀土资源利用国家重点实验室, 吉林长春 130022; 2 中国科学院研究生院, 北京 100049
  • 收稿日期:2010-11-15 修回日期:2010-12-29 出版日期:2011-05-31 发布日期:2014-09-29

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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1048

被引次数

33

摘要： 考察了钛硅分子筛 (TS-1) 以及硅烷化钛硅分子筛 (TS-1-S) 上环烷酸钴 (Co-nap) 催化环己烷氧化反应性能. 结果表明, TS-1 和 TS-1-S 对该反应均具有显著的促进作用, 环己烷转化率由无 TS-1 时的 3.6% 分别提高至 6.4% 和 7.9%, 产物选择性保持在 80% 左右, 反应时间由 300 min 可缩短为 130 min. 进一步的研究表明, 随着 TS-1 的加入, Co-nap 在其表面发生了吸附, 使得均相反应变成了“类多相催化反应”, 这是反应性能显著提高的主要原因.

关键词: 钛硅分子筛, 环己烷, 均相氧化, 吸附, 硅烷化

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