The role of the solvent in TS-1 chemistry: active or passive? An early study revisited

被引:67
作者
Clerici, MG [1 ]
机构
[1] EniTechnol, I-20097 San Donato Milanese, Milano, Italy
关键词
TS-1; Ti-zeolite; solvent effect; hydrogen peroxide; oxidation; hydroxylation;
D O I
10.1023/A:1016614218678
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
The oxidation of n-hexane with hydrogen peroxide, catalyzed by TS-1 in various solvents, is reported. The initial rate of reaction decreases in the order: t-butanol > t-butanol/water > methanol approximate to acetonitrile approximate to water, whereas the reverse trend was observed for the adsorption of n-hexane in the catalyst. A dual function is postulated for the solvent in relation to its effects on kinetics. It assists the sorption/desorption of reagents/products in TS-1 (passive role) and participates in the catalytic cycle, through interactions with polar species involved in it (active role). A mechanistic pathway for the hydroxylation of paraffinic and aromatic C-H bonds is suggested.
引用
收藏
页码:257 / 263
页数:7
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