Catalyst component for olefinic polymerization , and catalyst thereof

Abstract

The invention relates to a catalyst component used in olefin polymerization, which has a general formula as follows: MgX2-mROH-nE-pH2O, and is a product of contact between magnesium halide adduct and at least one titanium compound, wherein, X is chlorine or bromine, R is C1-C12 alkyl, C3-C10 naphthenic base or C6-C10 aryl, E is o-alkoxyphenyl acid ester compound, m is 1 to 5, n is 0.005 to 1.0, and p is 0 to 0.8. When the catalyst component is used in olefin polymerization, especially in propylene polymerization, not only the activity of polymerization is higher, the obtained polymer particle is shaped well, and the fine powder is less, but also the high melt index polymer obtained under high hydrogen concentration has high isotacticity, so the catalyst component is very applicable to the requirements of industrial production of polypropylene.

Description

Technical field

[0001] The present invention relates to a spherical catalyst component and catalyst for olefin polymerization, and its use in α-olefin CH 2 =CHR and its mixture in the polymerization reaction application, wherein R is hydrogen or an alkyl group of 1-12 carbon atoms. More specifically, it relates to a catalyst containing the reaction product of a spherical adduct of the ternary components of magnesium halide, alcohol and o-alkoxy benzoate compound and a titanium compound and its application. technical background

[0002] The preparation of Ziegler-Natta catalysts by supporting titanium compounds and electron donor compounds on active magnesium halide is well known in the prior art.

[0003] The active magnesium halide often uses the adduct of magnesium halide and alcohol, which is used as a carrier to react with titanium halide and an electron donor compound to obtain a spherical catalyst. It has high performance when used for olefin polymerization, especially prop...

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