Supported non-metallocene catalyst, preparation method and application

Abstract

The invention relates to a supported non-metallocene catalyst and a preparation method. The supported non-metallocene catalyst is prepared by the steps of precipitating a mixed slurry of a magnesium compound and a solvent, loading a non-metallocene complex, treating with an IVB group chemical treating agent and directly drying. The preparation method is simple and feasible, and the load capacity of the non-metallocene ligand is adjustable. The invention also relates to the application of the supported non-metallocene catalyst in olefin homopolymerisation/copolymerization. Compared with the prior art, the supported non-metallocene catalyst has the characteristics of less usage of a cocatalyst for catalyzing polymerization of alkene, high polymerization activity, substantial copolymerization effect, high bulk density of polymer, and high and adjustable viscosity average molecular weight of the prepared ultrahigh molecular weight polyethylene.

Description

[0001] This application is based on the research project of "(National Eleventh Five-Year Support Plan Project). This project has received great attention and strong support from the Ministry of Science and Technology. Its goal is to form a new generation of polyolefin catalyst technology with independent intellectual property rights and improve domestic The homogeneity of related products has improved the grade of polyolefins in my country and promoted its development in the direction of diversification, serialization, specialization and high performance. Technical field [0002] The invention relates to a non-metallocene catalyst. Specifically, the present invention relates to a supported non-metallocene catalyst, its preparation method and its application in olefin homopolymerization / copolymerization. Background technique [0003] Non-metallocene catalysts appeared in the mid-to-late 1990s, also known as post-catalysts. The central atom of the main catalyst includes almost all t...

AI Technical Summary

Problems solved by technology

These two methods use a magnesium compound support, and the particle morphology of the catalyst is difficult to control, which limits the particle morphology of the polymer obtained from the polymerization.

[0010] Chinese patents CN200910180603.3, CN200910180604.8, CN200910210989.8, CN200910210986.4, CN200910210985.X, CN200910210990.0 disclose the preparation method of supported non-metallocene catalysts similar to the above-mentioned patents. Particle morphology in the presence of catalyst is difficult to control, limiting the polymer particle morphology obtained from this polymerization

[0011] Catalysts supported on anhydrous magnesium chloride show high catalytic activity in olefin polymerization, but such catalysts are very brittle and break easily in the polymerization reactor, resulting in poor polymer morphology

Silica-supported catalysts have good fluidity and can be used in gas-phase fluidized bed polymerization, but silica-supported metallocene and non-metallocene catalysts show low catalytic activity

[0018] Patents CN200910180100.6 and CN200910180607.1 disclose that in the absence of alcohol, the non-metallocene complex is dissolved in the magnesium compound solution, and then the porous carrier is added, dried directly or filtered, washed and dried, and then treated with IVB chemical treatment agents, thereby The preparation method and polymerization application of the supported non-metallocene catalyst are obtained. The non-metallocene complex exists uniformly in the carrier, but in the example...

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