A catalyst, its preparation method, its composition and application

Abstract

The invention relates to a catalyst, a preparation method thereof, a composition prepared from the catalyst and applications of the catalyst and the composition. The catalyst has a structural formulashown in the description. The preparation method of the catalyst comprises the following steps: firstly, dissolving 2-hydroxy-1,4-naphthoquinone and a substituted aniline into an organic solvent, andperforming a reaction to obtain an aniline naphthoquinone ligand; secondly, dissolving the aniline naphthoquinone ligand into an organic solvent, adding a hydrogen removing reagent, and performing a reaction to obtain a ligand salt compound; and finally, adding a nickel precursor, and performing a reaction to obtain the catalyst. The catalyst provided by the invention can form the composition witha cocatalyst, and the catalyst and the composition can be used to catalyze polymerization of olefin monomers and copolymerization of ethylene and a polar monomer. The catalyst provided by the invention can effectively regulate and control the molecular weight and chain structure of an olefin polymerization product by using different cocatalysts for cooperation, the catalyst has high catalytic activity, can achieve certain activity without the need of the cocatalysts, and has good economical performance, and the composition prepared from the catalyst also has higher catalytic activity.

Description

technical field [0001] The invention belongs to the field of olefin catalysis, and relates to a catalyst, a preparation method thereof, a composition prepared therefrom and applications thereof, in particular to a catalyst for catalyzing ethylene or ethylene and polar / functional monomers, a preparation method thereof, Compositions and applications obtained. Background technique [0002] Polyolefin catalysts are the core and key of the olefin polymerization industrial production process, and there are many types of them. The current industrialized catalysts mainly include Ziegler-Natta catalyst system, Phillips catalyst system and metallocene catalyst system. In recent years, late transition metal olefin polymerization catalysts have been greatly developed. Late transition metal catalysts refer to a class of metal complex olefin polymerization catalysts with nickel, palladium, iron, cobalt, ruthenium and other late transition metal atoms as active centers. It has the followi...

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the defect that the catalytic activity of the post-transition metal catalyst in the prior art is not high, and a large amount of promoters need to be added to improve the catalytic activity, and provide a catalyst for olefin polymerization that has high catalytic activity and can achieve a certain activity without the need for a promoter , the present invention has produced a kind of aniline naphthoquinone post-transition metal catalyst, uses this catalyst to carry out the polymerization of ethylene or ethylene and polar / functional monomer to obtain polymer, and this catalyst has high catalytic activity and has the ability to polar / functional monomer Strong copolymerization ability, the catalyst can also be used with co-catalysts for the polymerization of ethylene or ethylene and polar / functional monomers. Stronger copolymerization ability, higher insertion rate of product polar / functional monomer

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