Selective oxidation of propylene to propylene oxide over Ti-MCM-41 supporting metal nitrate

被引：21

作者：

Miyaji, T ^{[1
]}

Wu, P ^{[1
]}

Tatsumi, T ^{[1
]}

机构：

[1] Yokohama Natl Univ, Grad Sch Engn, Div Mat Sci & Chem Engn, Hodogya Ku, Yokohama, Kanagawa 2408501, Japan

来源：

CATALYSIS TODAY | 2001年 / 71卷 / 1-2期

关键词：

direct gas-phase oxidation; Ti-MCM-41; metal nitrates;

D O I：

10.1016/S0920-5861(01)00427-8

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The direct gas-phase oxidation of propylene with molecular oxygen was carried out over Ti-MCM-41 impregnated with metal nitrates to produce propylene oxide (PO) selectively. The effects of Ti-loading on MCM-41, nitrate additives, acid treatment of the support, and the presence of molecular oxygen were investigated. The PO yield increased with increasing Ti content of Ti-MCM-41 and reached a maximum at an optimum Si/Ti ratio of 100. Calcium nitrate was the most suitable additive among various nitrates of alkali and alkaline earth metals investigated, and the acid treatment of Ti-MCM-41 effectively improved its catalytic performance for the PO formation. The presence of both nitrate and molecular oxygen was essential for the PO formation. A synergetic mechanism between the Ti species and metal nitrate was proposed to be responsible for the selective fort-nation of PO. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：169 / 176

页数：8

共 12 条

[1] SYNTHESIS OF PROPYLENE-OXIDE FROM PROPYLENE AND HYDROGEN-PEROXIDE CATALYZED BY TITANIUM SILICALITE [J].