Highly active supporting method of non-metallocene catalyst

Abstract

A method of non- metallocene catalyst loading with high active: the carrier and chemical activating agent reacting with each other to get the modification carrier; dissolving the magnesium compounds into the tetrahydrofuran-alcohol mixing system to form solution, adding the modification carrier into the solution for reaction, filtering, washing, drying and sucting to get the composite carrier; dissolving the non- metallocene catalyst for lkene polymerization into the dissolvent, then reacting with the composite carrier and through process of washing, filtering and drying to get the load non- metallocene catalyst. It can also be: proceeding heating activating treatment before the reaction of carrier with the chemical activating agent; the composite carrier reacting with chemical additive before reacting with catalyst to get the modification composite carrier, the modification composite carrier reacting with catalyst to get the load non- metallocene catalyst. The load catalyst produced in this invention is high active; the load catalyst of high property can be produced with less methylaluoxane; the polyolefine produced with the catalyst prepared in this invention possesses sound granual shape.

Description

technical field [0001] The invention belongs to the technical field of catalyst loading, and relates to a loading method of a non-metallocene catalyst, which is a non-metallocene olefin polymerization catalyst loaded on a composite carrier, and a highly active loaded non-metallocene catalyst is obtained by loading . The composite carrier-supported non-metallocene catalyst can be used for catalyzing olefin polymerization and copolymerization, especially for catalyzing the homopolymerization of ethylene or the copolymerization of ethylene and other α-olefins. Background technique [0002] Homogeneous transition metal catalysts known to be highly active in olefin polymerization, such as unsupported Ziegler-Natta catalysts, metallocene olefin polymerization catalysts, constrained geometry olefin polymerization catalysts or non-metallocene olefin polymerization catalyst. The coordination atoms of non-metallocene olefin polymerization catalysts are oxygen, nitrogen, sulfur and c...

AI Technical Summary

Problems solved by technology

[0008] 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 lower catalytic activity

However, after the non-metallocene catalyst is supported by an inert carrier, the catalytic activity of olefin polymerization will be more or less reduced, and some even reduce the activity by more than an order of magnitude, which leads to the uneconomical application of the supported catalyst.

What's more, after the activity is reduced, the ash content of the obtained polymer increases, and an additional deashing process is required in the production, which leads to an increase in cost and complexity of the production device, which limits its further application in the catalytic production of polyolefins

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