Olefin polymerization catalyst component as well as catalyst and application thereof

Abstract

The invention discloses an olefin polymerization or copolymerization catalyst component as well as a catalyst and application thereof. The catalyst component is prepared through the following steps: (1) enabling a magnesium compound, an organic epoxy compound, an organic phosphorus compound and a silane compound to be in contact with each other in a solvent to form a uniform solution; (2) with the existence of a phenolic compound and an acyl chloride compound, enabling the uniform solution and a titanium compound to be in contact with each other to obtain a mixture; (3) enabling the mixture obtained in the step (2) and an electron donor compound to be in contact with each other, and obtaining the olefin polymerization titaniferous catalyst component through filtering, washing and drying. The olefin polymerization or copolymerization catalyst component has high catalytic activity and slow activity attenuation when being applied to propylene polymerization and copolymerization.

Description

technical field [0001] The present invention relates to a catalyst component for olefin polymerization or copolymerization, its catalyst, and its application in olefin polymerization or copolymerization. Background technique [0002] In the late 1970s, companies such as Mitsui Petrochemical Corporation of Japan and Monai of the United States successfully developed titanium-magnesium high-efficiency carrier catalysts with magnesium chloride as the carrier. Because the carrier was used to improve the utilization rate of the active center of the titanium atom, the catalytic activity was improved. It is much higher than conventional catalysts and simplifies the polymerization process, so the world's polyolefin industry has developed rapidly. Conventional methods for preparing highly active supported catalysts are generally co-grinding, grinding and impregnating, spraying carrier forming and high-speed stirring carrier forming, etc. The main disadvantage of the catalyst obtained...

AI Technical Summary

Problems solved by technology

When the catalyst system is used for propylene polymerization, the obtained polymer has high isotacticity and high apparent density, but the catalyst activity is not high

[0004] Chinese patent CN1453298A discloses a class of glycol ester compounds containing special structures as electron donors. The use of such electron donors can not only improve the activity of the catalyst, but also significantly broaden the molecular weight distribution of the obtained propylene polymer. The synthesis and purification process of alcohol ester compound is complicated, which makes the catalyst production cost higher