Large pore Ti-zeolites and mesoporous Ti-silicalites as catalysts for selective oxidation of organic sulfides

被引：96

作者：

Corma, A

Iglesias, M

Sanchez, F

机构：

[1] CSIC,INST QUIM ORGAN,E-28006 MADRID,SPAIN

[2] CSIC,INST CIENCIA MAT,SEDE D,E-28006 MADRID,SPAIN

来源：

CATALYSIS LETTERS | 1996年 / 39卷 / 3-4期

关键词：

oxidation of thioethers; Ti-zeolites; Ti-silicalites; size effects;

D O I：

10.1007/BF00805575

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The oxidation of bulky thioethers has been carried out on Ti-Beta and Ti-MCM-41 catalysts, using H2O2 and t-butyl hydroperoxide (TBHP) as oxidants. The intrinsic activity of Ti-Beta was higher than that of Ti-MCM-41 for the oxidation of methyl phenyl sulfide which can penetrate in the pores of Beta, while in the case of the larger isopentyl phenyl sulfide, which diffuses more slowly in Ti-Beta zeolite, Ti-MCM-41 gives a larger activity. Ti-Beta is able to perform better for the more demanding oxidation of sulfoxides to sulfones giving, therefore, higher selectivities to sulfones than Ti-MCM-41. Similar results were obtained when using either H2O2 or TBHP as oxidants. However, the sterical effects were enhanced when TBHP was used as oxidant.

引用

页码：153 / 156

页数：4

共 11 条

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