Olefinic polymerization catalyst carried by carrier of sphere MgCl-alcohol-organic complexing agent and preparation method

Abstract

The invention discloses an defin polymerization catalyst loaded on spherical MgCl2-alcohol-organic complexing agent camier and its preparation method. Said method includes the following steps: under the protection of argon gas using TiCl4 and MgCl2-alcohol-organic complexing agent spherical carrier, stirring them at -30 deg.c-0 deg.C in reaction still and making them produce reaction for 10-30 min., heating to 60 deg.C-80 deg.C, adding internal doner residues, and more heating to 90 deg.C-140 deg.C, thermostatically stirring and making reaction for 1-3 hr., then removing liquid phase, adding TiCl4 to make treatment once, and removing liquod phase, washing by using solvent, removing solvent, vacuum drying so as to obtain spherical catalyst. Said spherical catalyst uses spherical MgCl2-alcohol-organic complexing agent as carrier, and the preparation process of said catalyst is retatively simple, and small in environmental pollution. Said invention can effectively regulate grain size of catalyst and its distribution by controlling grain size of spherical MgCl2-alcohol-organic copmlexing agent carrier and its distribution, after the olefin is catalyzed and polymerized, the spherical polyolefin can be obained.

Description

technical field

[0001] The present invention relates to the preparation method of catalyst, relate in particular to a kind of spherical MgCl 2 -Alcohol-organic complexing agent carrier supported olefin polymerization catalyst and preparation method. Background technique

[0002] Polyolefins, especially polypropylene and its copolymers, have a wide range of applications due to their low cost, light weight and good processing properties. The demand is constantly increasing, and the global production capacity is also increasing. The rapid development and continuous improvement of polyolefin production has benefited from the continuous advancement of catalysts. By designing and preparing spherical catalysts, spherical homopolymers and copolymers can be obtained, and the obtained polymer particles can be directly applied to processing and production without granulation process.

[0003] Currently commonly used preparation of MgCl 2 The method of spherical carrier has spray-dry...