Oligomerization of olefins in a chloroaluminate ionic liquid

被引：46

作者：

Stenzel, O ^{[1
]}

Brüll, R ^{[1
]}

Wahner, UM ^{[1
]}

Sanderson, RD ^{[1
]}

Raubenheimer, HG ^{[1
]}

机构：

[1] Univ Stellenbosch, Dept Chem, ZA-7602 Matieland, South Africa

来源：

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL | 2003年 / 192卷 / 1-2期

基金：

新加坡国家研究基金会;

关键词：

ionic liquid; oligomerization; polymerization; titaniumtetrachloride;

D O I：

10.1016/S1381-1169(02)00450-8

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：

Linear 1-olefins are oligomerized to dimers, trimers and tetramers by the Lewis acidic (excess of 0.1 mol equivalent AlCl3) ionic liquid [1-butyl-3-methylimidazolium][tetrachloroaluminate], even in the presence of ethylaluminiumdichloride. Addition of titaniumtetrachloride, however, generates branched, atactic polymers with narrow monomodal polydispersities as waxy or oily compounds in high yields. Molar masses vary from M-w = 650 to 1620 g/mol (M-n = 440-970 g/mol) independent of the monomer used. Predominantly 1,1,2-trisubstituted double bonds are formed by a migration mechanism in the termination step of the oligomerization process. In contrast, polymerization of ethene by titaniumtetrachloride in the conventional solvent toluene, affords mainly linear polyethene with a broader polydispersity and a higher molar mass. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：217 / 222

页数：6

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