Catalyst compositions based upon:
a) a Group VIII metal,
b) an acid with a pKa of less than 2 in a quantity of more than 5 mol per gram atom Group VIII metal, and
c) a phosphorus bidentate ligand of the general formula RS R6 P-R-PR7R8 in which R5 to R8 represent identical or different, optionally polar substituted hydrocarbyl groups containing a carbon atom which carbon atom carries at most one hydrogen atom and is linked to the corresponding phosphorus atom via a methylene bridge, and in which R is a divalent organic bridging group containing at least two carbon atoms in the bridge connecting the two phosphorus atoms,
and a process for the preparation of polymers of carbon monoxide with ethene and optionally also with one or more a-olefins by contacting the monomers with the catalyst composition.
催化剂成分基于:
a) 第 VIII 族
金属
b) pKa 小于 2 的酸,其含量为每克第八族
金属原子 5 摩尔以上,以及
c) 通式 RS R6 P-R-PR7R8 的
磷双叉
配体,其中 R5 至 R8 代表相同或不同的、任选极性取代的烃基,该烃基含有一个碳原子,该碳原子含有最多一个氢原子,并通过亚甲基桥与相应的
磷原子相连,其中 R 是二价有机桥基,在连接两个
磷原子的桥中至少含有两个碳原子、
以及通过将单体与催化剂组合物接触,制备
一氧化碳与
乙烯以及一种或多种 a-烯烃的聚合物的工艺。