Preparation method and applications of alkoxyl magnesium carrier

Abstract

The invention relates to a preparation method and applications of an alkoxyl magnesium carrier. The preparation method is used for preparing an olefin polymerization catalyst alkoxyl magnesium carrier. The alkoxyl magnesium carrier comprises the following components: magnesium powder, an initiator, a cross-linking agent, a unitary organic alcohol, a dispersing agent and a dispersing medium according to mole ratio of 1 to (0.00001-0.1) to (0.0001-0.5) to (2-100) to (0.05-50) to (1-100). The involved alkoxyl magnesium carrier is good in particle morphology, high in bulk density, and high in mechanical strength. A catalyst prepared by the carrier is used for preparing an olefin polymerization catalyst, the catalyst is high in activity, good in hydrogen regulation performance and good in copolymerization performance, and the polymer is low in the powder content, low in wax content, and good in particle morphology; the involved catalyst is used for ethylene homopolymerization, copolymerization of ethylene and alpha-olefin, or ethylene and polar alkene monomer, propylene homopolymerization, propylene and alpha-olefin copolymerization or propylene and polar alkene monomer copolymerization.

Description

technical field [0001] The present invention relates to a preparation method of an alkoxymagnesium carrier for an olefin polymerization catalyst, in particular to a method for preparing an alkoxymagnesium carrier for an olefin polymerization catalyst, which has good mechanical strength and high bulk density; The alkoxy magnesium carrier is used to prepare olefin polymerization catalyst, which has high catalyst activity, good hydrogen adjustment performance, good copolymerization performance, low polymer powder content, low wax content and good particle shape; the catalyst involved is used for ethylene homopolymerization, ethylene and α-olefin copolymerization or ethylene and polar vinyl monomer copolymerization, propylene homopolymerization, propylene and α-olefin copolymerization or propylene and polar vinyl monomer copolymerization. Background technique [0002] Currently, the most widely used olefin polymerization catalyst support is magnesium chloride. Magnesium chlorid...

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Problems solved by technology

[0029] The results reported so far indicate that diethoxymagnesium particles are composed of small molecule Mg(OEt) 2 It is randomly piled up, and the inside of the particles is gathered together by the force between small molecules. Therefore, the shape of the carrier particles is poor, the mechanical strength is low, and the content of polymer fine powder is high, which cannot meet the requirements of industrial production for olefin coordination polymerization catalyst carriers.

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