[EN] ASYMMETRIC (?-DIIMINE) NICKEL COMPLEX CATALYST AND PREPARATION METHOD AND USE THEREOF<br/>[FR] CATALYSEUR COMPLEXE DE (?-DIIMINE) ET DE NICKEL ASYMÉTRIQUE ET SON PROCÉDÉ DE PRÉPARATION ET SON UTILISATION
申请人:CHINESE ACAD INST CHEMISTRY
公开号:WO2012122854A1
公开(公告)日:2012-09-20
Disclosed in the present invention are an asymmetric (α-diimine) nickel complex catalyst and preparation method and use thereof. The complex is as shown in formula I, wherein Rl is a diphenylmethyl, R2 is methyl or diphenylmethyl, R3 is methyl, ethyl, isopropyl, diphenylmethyl or halogen, R4 is an alkyl with a total carbon atom number of 1-3, R5 is hydrogen or an alkyl with a total carbon atom number with 1-3, and X is chlorine or bromine. The preparation method is: under oxygen free conditions, reacting a ligand with (DME)NiBr2 or NiCl2·4H20 to obtain the product. The present invention synthesizes an asymmetric α-diimine ligand and metal nickel complex; the complex can catalyse ethylene polymerization well to obtain a high molecular weight polymer under the action of cocatalysts diethylaluminium chloride, methylaluminoxane or modified methylaluminoxane, and at the same time, its activity is very high: the highest activity can be l07g·mol-1(M)·h-1. Thus it is likely to have a wide application in industry.