USE OF V AND V-CR CATALYSTS INTERCHANGED IN Y-ZEOLITES FOR THE POLYMERIZATION OF ETHYLENE

被引：4

作者：

ISMAYEL, A

ARRIBAS, G

CELTA, D

SANCHEZ, G

机构：

[1] Universidad Central de Venezuela, Facultad de Ciencias

来源：

JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY | 1994年 / 32卷 / 08期

关键词：

POLYMERIZATION; ETHYLENE; POLYETHYLENE; CATALYST; ZEOLITES;

D O I：

10.1002/pola.1994.080320814

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Ethylene polymerization has been studied in the presence of catalyst based on vanadium or vanadium-chromium supported on a zeolite HY. The effect of vanadium over chromium has been investigated as a function of the sequence of exchange of metals on the support and metal contents. Both effects were investigated in relation to the characteristics of the polyethylene (PE) obtained. Low activity has been found for the V (II) zeolite HY catalyst. Moreover, vanadium acts either as an inhibitor or as a promoter for the polymerizing activity of the Cr (III)/zeolite catalyst, depending on the preparation method. (C) 1994 John Wile & Sons Inc.

引用

页码：1539 / 1542

页数：4