Catalyst components and catalysts for ethylene polymerization

Abstract

The present invention relates to a catalyst component for ethylene polymerization and the catalyst thereof, wherein the catalyst component comprises a magnesium complex, a titanium compound, an organic alcohol compound and a boron compound. The organoboron compound is selected from at least one of the following structural formula 1, structural formula 2 and structural formula 3. The catalyst of the invention is very suitable for the slurry polymerization process of ethylene, and the catalyst has better hydrogen adjustment sensitivity and higher catalytic activity.

Description

technical field

[0001] The invention relates to a catalyst component for ethylene polymerization, a preparation method of the catalyst component and a catalyst thereof. More specifically, it relates to a catalyst component containing an organic boron compound, a preparation method of the catalyst component and a catalyst. technical background

[0002] As we all know, the catalyst system containing Ti / Mg composite plays a dominant role in the industrial production of polyethylene, 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 hydrogen adjustment 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 distribution of the produced ethylene polymer. In the process of ethyle...

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