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石化工业最重要的产品是聚烯烃,其中大部分与聚乙烯相关,α-烯烃不仅是重要的共聚单体,也是精细化工的基本原料,乙烯工业发展程度代表了一个国家石化技术的水平。后过渡金属催化剂作为新型催化体系,能够高效催化乙烯齐聚和聚合,并且乙烯聚合可制备新型聚乙烯树脂。通过对配体的修饰,提高后过渡金属配合物催化活性,增加催化体系的热稳定性,仍然是当前催化剂设计的重要课题;实现对所得聚乙烯微观结构的控制,提高聚烯烃宏观性质是产业化的重要基础。本文基于配合物催化剂配体骨架设计为基础,集中讨论了铁、钴和镍配合物用于乙烯聚合和齐聚的性质比较;特别是集中展示了我们近期研究工作,综述了后过渡金属催化剂的新进展。
The most important product in the petrochemical industry is polyolefins, most of which are related to polyethylene. Alpha-olefins are not only important comonomers, but also basic raw materials for fine chemicals. The degree of industrial development of ethylene represents the level of a national petrochemical technology. After the transition metal catalyst as a new catalytic system can efficiently catalyze the ethylene oligomerization and polymerization, and ethylene polymerization can be prepared a new type of polyethylene resin. It is still an important issue in the current catalyst design to modify the ligands to improve the catalytic activity of the transition metal complex and increase the thermal stability of the catalyst system. To achieve the control of the obtained polyethylene microstructure and to enhance the macroscopic properties of the polyolefin, An important basis for change. Based on the framework design of complex catalyst ligands, this paper focuses on the comparison of the properties of iron, cobalt and nickel complexes for the polymerization and oligomerization of ethylene. In particular, we focus our recent work on the synthesis of catalysts for post-transition metal catalysts new progress.