应用化学 ›› 1990, Vol. 0 ›› Issue (3): 85-88.

• 研究简报 • 上一篇    下一篇

一种均相稀土催化剂反应过程的初步研究

逄束芬, 谢德民, 孙涛, 嵇显忠, 单成基, 杨继华   

  1. 中国科学院长春应用化学研究所 长春 130022
  • 收稿日期:1989-07-25 修回日期:1989-11-21 出版日期:1990-06-10 发布日期:1990-06-10
  • 基金资助:
    国家自然科学基金

PRELIMINARY STUDY ON THE REACTION PROCESS OF A HOMOGENEOUS RARE EARTH CATALYST

Pang Shufen, Xie Demin, Sun Tao, Ji Xianzhong, Shan Chengji, Yang Jihua   

  1. Changchun Institute of Applied Chemistry, Academia Sinica, Changchun 130022
  • Received:1989-07-25 Revised:1989-11-21 Published:1990-06-10 Online:1990-06-10

摘要: 稀土元素组成的Ziegler-Natta型催化剂,其相态常受体系中Cl/Nd克原子比所制约,仅在Cl/Nd≤2克原子比时呈均相态[1]。最近发现一类新型催化体系,可在较宽Cl/Nd下保持均相态,如以Me2SiCl2(二甲基二氯硅烷)[2],烯丙基氯[3]等为第三组份所组成的体系。

关键词: 稀土催化剂, 丁二烯聚合, 均相反应

Abstract: A homogeneous rare earth catalyst comprising neodymium octonate, diisobutylaluminumhydride and dichlorodiphenylsilane[Nd(Oct)3 -HAl(i-Bu)22SiCl2] for stereospecific polymeri-zation of butadiene was selected to study the action of the third component in the homoge-neous system. Investigation on reactions between Nd(oct)3, HAl(i-Bu)2 and φ2SiCl2 bymeans of NMR(1H and 13C spectra)showed that the tφ2SiCl2,unlike alkyl aluminum chloride,does not react directly with Nd-salt, suepplying the chlorine atom, it reacts first with HAl(i-Bu)2, giving φ2SiH2 and Al(i-Bu)2Cl, and the latter affords the Nd-salt chlorineatom necessary for forming an active catalyst.Some experimental facts found in polymeriza-tion of butadiene using the catalyst were explained by the reaction path mentioned above.

Key words: rare earth catalyst, butadiene polymerization, homogeneous reaction