A process for the preparation of polyketones by polymerizing a mixture of CO and an alkenically unsaturated hydrocarbon in the presence of a Group VIII metal catalyst containing ligands, which comprise hydrocarbon groups that are bonded to an element from groub Vb, characterized in that, as catalyst, a complex compound is used that is obtained by reacting a palladium, cobalt or nickel compound, an anion of an acid with a pKa of less than 2, provided it is neither a hydrohalogenic acid nor carboxylic acid and a bidentate ligand of the general formula R1R2-M-R-M-R3R4, in which M represents phosphorus, arsenic or antimony, R represents a divalent organic bridging group having at least two carbon atoms in which the bridge, none of these carbon atoms carrying substituents that may cause steric hindrance and in which R1, R2, R3 and R4 are identical or different hydrocarbon groups.
一种制备聚酮酮的工艺,其方法是在含有
配体的第八族
金属催化剂存在下,使 CO 和烯烃不饱和烃的混合物聚合,
配体包括与 Vb 族元素键合的烃基,其特征在于,作为催化剂,使用了一种复合物,该复合物是由
钯、
钴或
镍化合物、pKa 小于 2 的酸的阴离子和通式为 R1R2-M-R-M-R3R4 的双齿
配体(其中 M 代表
磷、
砷或
锑)反应而得、其中 M 代表
磷、
砷或
锑,R 代表二价有机桥基,桥基中至少有两个碳原子,这些碳原子中没有一 个带有可能引起立体阻碍的取代基,R1、R2、R3 和 R4 是相同或不同的烃基。