Catalyst component for ethylene polymerization in slurry process and preparation method thereof

Abstract

The invention provides a titanium-containing solid catalyst component for ethylene polymerization in a slurry process. The solid catalyst component is prepared by dissolving magnesium halide in an organic epoxy compound and an organic phosphorous compound, adding electrons to form uniform solution, reacting the solution and halide of transition metal titanium or derivative solution of the halide,and after the catalyst solid is separated out, adding a halogenated alcohol compound for modification and thus obtaining the solid catalyst component. The catalyst system consisting of the titanium-containing solid catalyst component is applied to the ethylene polymerization and has high activity and high bulk density. At the same time, the obtained polymer has a relatively good particle form.

Description

technical field [0001] The present invention relates to a catalyst component for ethylene polymerization, its preparation method, and its application in olefin polymerization. Background technique [0002] The traditional Z-N catalyst started from the classic titanium-aluminum catalyst, and has progressed to the stage of being activated by compounds such as magnesium chloride and modified by various other organic compounds; and has developed from simply improving the catalytic activity to improving polymer products by adjusting the catalyst performance. [0003] Since the 1970s, companies such as Mitsui Petrochemical Industry Co., Ltd. of Japan have successfully developed a variety of Ti-Mg high-efficiency carrier catalysts with magnesium chloride as the carrier, which has enabled the rapid development of the world's slurry production of polyolefin industry. In the ethylene polymerization method disclosed in Japanese Patent JP49-51378, the catalyst is a Ti / Mg efficient carr...

AI Technical Summary

Problems solved by technology

However, since the catalyst uses alcohols and alkane solvents with large polar differences to dissolve the magnesium halide, the magnesium halide cannot be completely dissolved to form a homogeneous solution, but only a fine colloidal suspension or a swollen halogenated halide. Magnesium slurry

This brings some disadvantages related to the layered crystallization characteristics of magnesium halide to the prepared catalyst, such as: the prepared polymer has low apparent density, poor particle shape and distribution, etc.