Nickel complex and preparation and application thereof

Abstract

The invention discloses a nickel complex. The structure of the nickel complex is shown in the formula I, wherein R1 is C1-C3 alkyl; R2 is hydrogen, methyl or ethyl; R3 is hydrogen, halogen or aromatic base; and X is halogen. The invention also provides a preparation method and application of the nickel complex. The nickel complex has better catalytic property in the ethylene oligomerization and polymerization reactions in the presence of a cocatalyst aluminoxane or alkylaluminum. The polymerization activity of the complex reaches 1.24*10<7>g.mol<-1> (Ni).h<-1>, at the same time, the molecular weight distribution can be lowered to 1.8 and the oligomerization activity of the complex can reach 9.5*10<6>g.mol<-1> (Ni).h<-1>. The formula I is shown in the specification.

Description

technical field The invention relates to a nickel metal complex and its preparation and application. Background technique The rapid development of the ethylene oligomerization industry is largely due to the development of its catalyst and the huge application of α-olefin and polyethylene in today's life and industry. The method of a main industrial production linear alpha olefin is to apply SHOP type catalyst at present, and its structure is shown in the following formula (Angew.Chem., Int.Ed.Engl.1978,17,466-467; Angew.Chem., Int. Ed. Engl. 1983, 22, 503; J. Chem. Soc., Chem. Commun. 1994, 2203-2204): and Ziegler-Natta type catalysts (DE patent, 889229.1953-09-07; IT patent, 545332.1954; IT patent, 536899.1955; Belg patent, 533326.1955-05-05; Angew chem.1955, 67, 541-547; J Polym Sci PartA : Chem, 1955, 16: 143-154), Phillips type catalyst (Belg patent 530617.1955; US patent, 2825721.1958-03-04; Adv Catalysis, 1985, 33: 47-56) and metallocene type catalyst (Metalorgani...

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