Novel catalyst compositions and process for copolymerizing ethene and carbon monoxide
申请人:SHELL INTERNATIONALE RESEARCH
MAATSCHAPPIJ B.V.
公开号:EP0222454A2
公开(公告)日:1987-05-20
Novel catalyst compositions for copolymerizing ethene and carbon monoxide, characterized in that they comprise:
a) a compound of a Group VIII metal chosen from palladium, cobalt and nickel,
b) an anion of an acid with a pKa of less than 6, and
c) a bidentate ligand of the general formula R¹R²-M-R-M-R³R⁴, wherein M represents phosphorus, arsenic or antimony, R is a bivalent organic bridging group containing two or three carbon atoms in the bridge and R¹, R², R³ and R⁴ represent hydrocarbon groups which may or may not be substituted with polar groups, on the understanding that at least one hydrogen atom in at least one of the groups R¹, R², R³ and R⁴ is substituted with a polar substituent.
用于乙烯和一氧化碳共聚的新型催化剂组合物,其特征在于它们包括
a) 选自钯、钴和镍的第八族金属化合物、
b) pKa 小于 6 的酸阴离子,以及
c) 通式为 R¹R²-M-R-M-R³R⁴的双叉配体,其中 M 代表磷、砷或锑,R 是桥中含有两个或三个碳原子的二价有机桥基,R¹、R²、R³ 和 R⁴ 代表烃基,这些烃基可以被极性基团取代,也可以不被极性基团取代,前提是 R¹、R²、R³ 和 R⁴ 中至少有一个基团中的至少一个氢原子被极性取代基取代。