Studies on the active species of propylene oxide polymerization initiated by double metal cyanide complex catalyst

被引：0

作者：

Liu, XH ^{[1
]}

Kang, MQ ^{[1
]}

Wang, XK ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Coal Chem, Taiyuan 030001, Peoples R China

来源：

CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE | 2000年 / 21卷 / 11期

关键词：

double metal cyanide complex catalyst; extended X-ray absorption fine structure; local structure; organic lagand; active center;

D O I：

暂无

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The effects of organic ethers such as diethyl ether, ethylene glycol diethyl ether and diethyl glycol diethyl ether on the structure of double metal cyanide complex catalyst and the structural changes of such catalyst in the process of propylene oxide polymerization were investigated by EXAFS, The results show that Co in all DMC catalysts is still coordinated by six cyanogens, while Zn is coordinated by O atom in organic complex. The more numerous the number of the ether bond, the higher the coordination numbers of O to Zn ion, the more active the catalyst we make, Five or six O atoms coordinated Zn ion may be the real active center in the process of propylene oxide polymerization.

引用

页码：1748 / 1750

页数：3