钒系、钛系Ziegler-Natta催化体系电子作用过程描述

Description of electronic process of Ziegler-Natta catalyst system with vanadium or titanium

对Ziegler-Natta催化剂的形成和发展进行了介绍,并对其催化体系电子作用过程进行了描述。重点阐述了烷基铝化合物中铝原子与烷基的电子层分布情况、过渡金属元素的电子结构特点,描述以烷基铝和过渡金属卤化物为代表的类阴离子型催化剂和路易斯酸等阳离子型催化剂反应的具体过程以及钒催化剂的催化机理等。

This article introduces the formation and development of the Ziegler-Natta catalysts, and describes its electronic role in the process of the catalytic system. It especially describes the electron distribution of aluminum atoms and alkyl of alkyl aluminum compound;the electronic structure charac- teristics of transition metal elements; the reaction process of cationic catalyst similar anionic catalyst and a Lewis acid as the representative of alkyl aluminium and transition metal halides; the catalytic mechanism of vanadium catalyst and so on.