Chemical modification of silica support to improve the branching ability of Phillips catalyst

被引：2

作者：

Dwivedi, Sumant ^{[1
,2
]}

Gujral, Satnam Singh ^{[1
,2
]}

Taniike, Toshiaki ^{[1
]}

Terano, Minoru ^{[1
]}

机构：

[1] Japan Adv Inst Sci & Technol, Sch Mat Sci, Nomi, Ishikawa 9231292, Japan

[2] Univ Delhi, Dept Chem, Delhi 110007, India

来源：

PURE AND APPLIED CHEMISTRY | 2013年 / 85卷 / 03期

关键词：

catalysts; ethylene; Phillips catalyst; polymerization; DIFFUSE-REFLECTANCE SPECTROSCOPY; ETHYLENE POLYMERIZATION; C-13; NMR; CHROMIUM; POLYETHYLENE; ACTIVATION; OXIDE;

D O I：

10.1351/PAC-CON-12-03-10

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A variety of modified Phillips catalysts were synthesized by employing three kinds of chemical modifiers for silica support: (1) organic modification with silane coupling agents, (2) Lewis acidic modification with typical metal alkyl or alkoxide, and (3) modification with transition-metal alkoxide. The activity and branching ability of these catalysts were investigated for ethylene polymerization. It was revealed that the chemical modification of silica support was a good methodology for controlling the catalyst activity as well as the branching level in resultant polyethylene.

引用

页码：533 / 541

页数：9

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