Catalyst for olefin polymerization reaction and preparation method and applications thereof

Abstract

The invention provides a catalyst component for olefin polymerization or copolymerization and a preparation method thereof. The preparation method comprises the following steps of: dissolving magnesiumhalide in a system containing an organic epoxy compound, an organic phosphorus compound and halohydrocarbon to form a solution; and in the presence of an auxiliary precipitation agent, reacting a titanium compound with the obtained solution, and precipitating the catalyst with magnesium and titanium for sediment. The preparation method of the catalyst active component has the advantages of easy obtaining of raw materials, lower production cost and high catalytic activity during using for propene polymerization or copolymerization, and is suitable for a variety of polymerization processes, such as a serous fluid method, a bulk method, a gas phase method and the like.

Description

technical field [0001] The present invention relates to a catalyst component for olefin polymerization or copolymerization, its preparation method, and its application in olefin polymerization or copolymerization. Background technique [0002] In the late 1970s, Japan’s Mitsui Petrochemical Company and U.S. companies such as Monai successfully developed a titanium-magnesium high-efficiency carrier catalyst with magnesium chloride as a carrier. Due to the use of magnesium chloride and other carriers to improve the utilization of the active center of the titanium atom, thus The catalytic activity is much higher than that of conventional catalysts, and the polymerization process is simplified, so the world's polyolefin industry has developed rapidly. Conventional methods for loading titanium active centers on the carrier include: co-grinding method, grinding impregnation method, spray carrier forming method and high-speed stirring carrier forming method, etc. The main disadvan...

AI Technical Summary

Problems solved by technology

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

[0004] In order to improve the performance of the above-mentioned catalysts, a class of glycol ester compounds containing a special structure was proposed in the Chinese patent CN1453298A as the internal electron donor of the catalyst. The use of such electron donors can not only improve the activity of the catalyst, but also the obtained propylene The molecular weight distribution of the compound is obviously widened, but the synthesis and purification process of this type of diol ester compound is complicated, which significantly increases the production cost of the catalyst

Images