A process for the preparation of a linear alternating copolymer of carbon monoxide with ethene and another olefinically unsaturated compound
申请人:SHELL INTERNATIONALE RESEARCH
MAATSCHAPPIJ B.V.
公开号:EP0743336A2
公开(公告)日:1996-11-20
A process for the preparation of a linear alternating copolymer of carbon monoxide with ethene and another olefinically unsaturated compound (A) wherein a copolymer of which the molar ratio (r1) of the monomer units originating in the olefinically unsaturated compound A to the monomer units originating in ethene is in the range of from 1:100 to 1:3, is prepared by contacting the monomers in the presence of a liquid diluent with a catalyst composition which is based on
(a) a source of a Group VIII metal, and
(b) a bidentate ligand of the general formula R1R2M1-R-M2R3R4 (I) wherein M1 and M2 independently represent a phosphorus, arsenic or antimony atom, R1, R2, R3 and R4 independently represent unsubstituted or substituted aryl groups and R represents a bivalent bridging group which consists of three atoms in the bridge of which the middle atom is a tetravalent atom which carries two monovalent substituents R5 and R6 consisting of carbon, hydrogen and optionally oxygen, and the two outer bridging atoms are carbon atoms, while the quotient r2/r1 is less than 24, in which quotient r1 is as defined hereinbefore and r2 is the molar ratio of the olefinically unsaturated compound A to ethene in the liquid phase.
一种用于制备一氧化碳与乙烯和另一种烯烃不饱和化合物(A)的线性交替共聚物的工艺,其中制备一氧化碳与乙烯和另一种烯烃不饱和化合物(A)的线性交替共聚物的方法是:在有液体稀释剂存在的情况下,将单体与催化剂组合物接触,其单体单元与乙烯单体单元的摩尔比(r1)在 1:100 至 1:3 的范围内,催化剂组合物的基础为
(a) 第 VIII 族金属源,和
(b) 通式 R1R2M1-R-M2R3R4 (I) 的双齿配位体 其中 M1 和 M2 独立地代表磷、砷或锑原子,R1、R2、R3 和 R4 独立地代表未取代或取代的芳基,R 代表二价桥基,该桥基由桥中的三个原子组成,其中中间原子为四价原子,该四价原子带有由碳、氢和氧组成的两个一价取代基 R5 和 R6、R2/r1 小于 24,其中 r1 如前定义,r2 是液相中烯烃不饱和化合物 A 与乙烯的摩尔比。