Epoxidation of cyclohexene on Ti/SiO2 catalysts prepared by chemical grafting TiCl4 on deboronated silica xerogel

Suli Wang; Qihua Yang; Zili Wu; Meijun Li; Jiqing Lu; Zhongyin Tan; Can Li

doi:10.1016/S1381-1169(01)00119-4

Epoxidation of cyclohexene on Ti/SiO₂ catalysts prepared by chemical grafting TiCl₄ on deboronated silica xerogel

Suli Wang, Qihua Yang, Zili Wu, Meijun Li, Jiqing Lu, Zhongyin Tan, Can Li

Research output: Contribution to journal › Article › peer-review

10 Scopus citations

Abstract

Ti/SiO₂ (or Ti/de[B]SiO₂) catalysts were prepared by grafting deboronated silica xerogel with gaseous TiCl₄. Using TBHP as oxidant, the Ti/de[B]SiO₂ catalyst shows both catalytic activity and selectivity in epoxidation of cyclohexene better than 80%, and the activity can be comparable with that of Ti-β. The catalytic activity of Ti/de[B]SiO₂ strongly depends on the content of B of support precursor, and the pretreatment temperature of the support. IR studies show that the sites in the deboronated silica xerogel to react with TiCl₄ are not only the silanol nests, but also the defect sites produced during the deboronation.

Original language	English
Pages (from-to)	219-225
Number of pages	7
Journal	Journal of Molecular Catalysis A: Chemical
Volume	172
Issue number	1-2
DOIs	https://doi.org/10.1016/S1381-1169(01)00119-4
State	Published - Jul 5 2001
Externally published	Yes

Funding

This work was financially supported by the State Key Project (Grant No. 19999022407) of the Ministry of Science and Technology, People’s Republic of China, and the National Science Foundation of China (NSFC) for Distinguished Young Scholars (Grant No. 29625305).

Funders	Funder number
State Key Project	19999022407
National Natural Science Foundation of China	29625305
Ministry of Science and Technology of the People's Republic of China

Keywords

Chemical grafting
Cyclohexene
Deboronation
Epoxidation
Ti/de[B]SiO

Access to Document

10.1016/S1381-1169(01)00119-4

Cite this

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title = "Epoxidation of cyclohexene on Ti/SiO2 catalysts prepared by chemical grafting TiCl4 on deboronated silica xerogel",

abstract = "Ti/SiO2 (or Ti/de[B]SiO2) catalysts were prepared by grafting deboronated silica xerogel with gaseous TiCl4. Using TBHP as oxidant, the Ti/de[B]SiO2 catalyst shows both catalytic activity and selectivity in epoxidation of cyclohexene better than 80%, and the activity can be comparable with that of Ti-β. The catalytic activity of Ti/de[B]SiO2 strongly depends on the content of B of support precursor, and the pretreatment temperature of the support. IR studies show that the sites in the deboronated silica xerogel to react with TiCl4 are not only the silanol nests, but also the defect sites produced during the deboronation.",

keywords = "Chemical grafting, Cyclohexene, Deboronation, Epoxidation, Ti/de[B]SiO",

author = "Suli Wang and Qihua Yang and Zili Wu and Meijun Li and Jiqing Lu and Zhongyin Tan and Can Li",

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T1 - Epoxidation of cyclohexene on Ti/SiO2 catalysts prepared by chemical grafting TiCl4 on deboronated silica xerogel

AU - Wang, Suli

AU - Yang, Qihua

AU - Wu, Zili

AU - Li, Meijun

AU - Lu, Jiqing

AU - Tan, Zhongyin

AU - Li, Can

PY - 2001/7/5

Y1 - 2001/7/5

N2 - Ti/SiO2 (or Ti/de[B]SiO2) catalysts were prepared by grafting deboronated silica xerogel with gaseous TiCl4. Using TBHP as oxidant, the Ti/de[B]SiO2 catalyst shows both catalytic activity and selectivity in epoxidation of cyclohexene better than 80%, and the activity can be comparable with that of Ti-β. The catalytic activity of Ti/de[B]SiO2 strongly depends on the content of B of support precursor, and the pretreatment temperature of the support. IR studies show that the sites in the deboronated silica xerogel to react with TiCl4 are not only the silanol nests, but also the defect sites produced during the deboronation.

AB - Ti/SiO2 (or Ti/de[B]SiO2) catalysts were prepared by grafting deboronated silica xerogel with gaseous TiCl4. Using TBHP as oxidant, the Ti/de[B]SiO2 catalyst shows both catalytic activity and selectivity in epoxidation of cyclohexene better than 80%, and the activity can be comparable with that of Ti-β. The catalytic activity of Ti/de[B]SiO2 strongly depends on the content of B of support precursor, and the pretreatment temperature of the support. IR studies show that the sites in the deboronated silica xerogel to react with TiCl4 are not only the silanol nests, but also the defect sites produced during the deboronation.

KW - Chemical grafting

KW - Cyclohexene

KW - Deboronation

KW - Epoxidation

KW - Ti/de[B]SiO

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