Loaded olefin polymerization solid catalyst ingredient, and preparation method and application thereof

Abstract

The invention discloses a loaded olefin polymerization solid catalyst ingredient, comprising a composite carrier SiO2 and a magnesium-containing compound of ClMg(OR)-n(ROH), and pyridine-2-alkyl imine titanium tetrachloride of formula (I) and TiCl4, wherein in the ClMg(OR)-n(ROH), R is selected from C1-C4 alkyl, n ranges from 0.1-1.0; in the formula (I), R1 and R2 are respectively monosubstituents or polysubstituents on pyridine ring and aniline ring and respectively selected from hydrogen, C1-C6 alkyl, phenyl or C7-C8 aralkyl, R3 is selected from hydrogen or C1-C3 alkyl, and the catalyst comprises 1.0-8.0 wt% of magnesium, 0.2-5.0 wt% of titanium, 0.1-0.9 wt% of nitrogen, and 40-80 wt% of SoO2. The catalyst used in olefin polymerization has good hydrogen response, and the obtained polymer has good form and bulk density and high melt index.

Description

technical field

[0001] The invention relates to a supported olefin polymerization solid catalyst and its preparation and application, specifically, a TiCl 4 and titanium complexes as active components, and the carrier contains SiO 2 The olefin polymerization solid catalyst component and its preparation method and application. Background technique

[0002] In the olefin polymerization process, hydrogen is used as a chain transfer agent and chain terminator for olefin polymerization, and is usually used as a regulator of the relative molecular weight of polyolefins. By changing the amount of hydrogen used in the polymerization process, the relative molecular weight of the polymer can be adjusted. Therefore, the hydrogen tuning performance of olefin polymerization catalysts is an important indicator of the comprehensive performance of catalysts.

[0003] During the processing of polyolefin materials, the melt index of the polymer is one of the important indicators to investig...

Images