硅烷化TS-1对环己烷均相氧化反应的促进作用

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300min可缩短为130min.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....

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Bibliographic Details
Published in催化学报 Vol. 32; no. 5; pp. 723 - 726
Main Author 王德强 张一波 肖德海 杨向光
Format Journal Article
LanguageChinese
Published 中国科学院研究生院,北京,100049%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 2011
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
Subjects
吸附
均相氧化
环己烷
硅烷化
钛硅分子筛
均相氧化
环己烷
硅烷化
钛硅分子筛
吸附
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ISSN0253-9837
1872-2067
DOI10.1016/S1872-2067(10)60193-3

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Summary: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300min可缩短为130min.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.
Bibliography:titanium silicate sieve; cyclohexane; homogeneous oxidation; adsorption; silylation
WANG Deqiang1,2,ZHANG Yibo1,2,XIAO Dehai1,YANG Xiangguang1,＊ 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
21-1195/O6
The promoting effect of titanium silicate（TS-1）molecular sieve and silanized 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.
ISSN:0253-9837
1872-2067
DOI:10.1016/S1872-2067(10)60193-3