Catalyst component for polymerization or copolymerization of ethylene and catalyst thereof

Abstract

The invention relates to a catalyst for ethene polymerization, and comprises the following components: A, a titanium containing solid catalyst component, which is prepared by the following steps: magnesium halide, organic epoxy compounds, organic phosphorous compounds, organic alcohol compounds are reacted for forming a uniform solution; and the solution, aromatic ester compounds, halide compounds of transition metallic titanium or derivatives thereof are mixed, and thereby obtaining the solid catalyst component; B. organic aluminium compound, whose general formula is AlRnX3-n, wherein, R is an alkyl which contains 1-20 hydrogen or carbon atoms, X is a halogen atom, and n is an integer which is less or equal to 3 and more than 0. The catalyst has the advantages of high catalytic activity and good hydrogen response, and the polymer has high bulk density, and the catalyst is suitable for homopolymerization of ethylene or copolymerization of ethylene and other alpha-alkenes.

Description

technical field [0001] The present invention relates to a catalyst component for ethylene polymerization or copolymerization, a preparation method of the catalyst component and a catalyst thereof. More specifically, it relates to a catalyst component in which an aromatic ester compound is added in the preparation process, a preparation method of the catalyst component and a catalyst thereof. Background technique [0002] As we all know, the catalyst system containing Ti / Mg composites plays a dominant role in the industrial production of polyolefins, and the core of its research is nothing more than the polymerization activity of the catalyst, the particle shape and particle size distribution of the catalyst, the hydrogenation sensitivity and Copolymerization performance and so on. In the slurry polymerization process of ethylene, in addition to requiring the catalyst to have high catalytic activity, it is very important to control the particle size and particle size distrib...

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Problems solved by technology

CN1958620A discloses that in the preparation of the catalyst, an organic silicon compound with a lower boiling point of tetraethoxysilanes is added, which is close to the boiling point of titanium tetrachloride, and is easy to be mixed with titanium tetrachloride in the recovery process of catalyst industrial production. Boil and distill, but affect the purity of titanium tetrachloride

CN102295717A discloses a method for preparing a catalyst. The catalyst prepared by this method has improved activity and hydrogenation sensitivity. However, since two kinds of electron donors are added to the system, in industrial production, the addition of electron donors is easy to produce Oligomers block the rectification tower, which is not conducive to the recovery of toluene and titanium tetrachloride

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