A ligand based chromium catalyst and application in catalyzing ethylene oligomerization are disclosed. The chromium catalyst is formed by a chromium compound and an organic ligand containing P and/or N. The substituents on N and P of the ligand can be replaced, whereby selective ethylene trimerization and tetramerization can be realized so as to produce 1-hexene and 1-octene at the same time.
本发明公开了一种基于
配体的
铬催化剂及其在催化
乙烯低聚过程中的应用。该
铬催化剂由
铬化合物和含有 P 和/或 N 的有机
配体组成,
配体上 N 和 P 的取代基可以被替换,从而实现选择性
乙烯三聚和四聚,以便同时生产
1-己烯和 1-
辛烯。