Chromium supported onto swelled Al-MCM-41 materials: a promising catalysts family for ethylene polymerization

被引：21

作者：

Calleja, G ^{[1
]}

Aguado, J ^{[1
]}

Carrero, A ^{[1
]}

Moreno, J ^{[1
]}

机构：

[1] Rey Juan Carlos Univ, ESCET, Madrid 28933, Spain

来源：

CATALYSIS COMMUNICATIONS | 2005年 / 6卷 / 02期

关键词：

mesoporous; MCM-41; chromium; ethylene; polymerization;

D O I：

10.1016/j.catcom.2004.12.003

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：

Swelled MCM-41 and Al-MCM-41 materials with large pore size and pore volume were synthesized and used as supports to prepare novel chromium catalysts for ethylene polymerization. Aluminium incorporation favoured chromium anchorage onto MCM-41 surface. Attachment of Cr species resulted from H-bonding of quasi pi-electron system of the acetylacetonate ligands with hydroxyl groups or with electron acceptor centres like Al3+. Chromium supported onto swelled Al-MCM-41 showed higher ethylene polymerization activity than conventional Cr/SiO2 catalysts tested in the same conditions. Properties of both obtained polymers were similar, indicating the formation of linear high-density polyethylene. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：153 / 157

页数：5

共 17 条

[1] INTERACTION OF ACETYLACETONE WITH HZSM-5 - VISUALIZATION OF NMR INVISIBLE ALUMINUM [J].