Solid catalyst component used for olefin polymerization and catalytic system thereof

A solid catalyst and olefin polymerization technology, applied in the field of polyolefin catalysts, can solve the problems of low bulk density and poor particle shape of resin powder, and achieve the effects of good particle shape, uniform distribution and high bulk specific gravity.

Pending Publication Date: 2019-02-15
朱博源
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is: the defect that the existing alkoxymagnesium-based polypropylene catalyst particles have poor morphology and low bulk density of resin powder

Method used

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  • Solid catalyst component used for olefin polymerization and catalytic system thereof
  • Solid catalyst component used for olefin polymerization and catalytic system thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] a) Preparation of Magnesium Ethoxide Microspheres

[0042] 57g (0.5mol) Mg (OC 2 h 5 ) 2 The solid powder and 200mL ethanol were put into a 500mL grinding tank, and were ground for 5 hours with the PM-400 ball mill of Germany Lai Chi Company to obtain Mg(OC) with an average particle size of 5.5 μm. 2 h 5 ) 2 suspension.

[0043] Get the Mg(OC 2 h 5 ) 2 100 mL of the suspension was transferred to the N 2 50 mL of ethanol was added to the replaced four-necked reaction flask, and treated with a high-speed disperser (Krupp Supraton TM type S200) at 60° C. for 20 hours to form a gel-like dispersion.

[0044] Add 0.22 g of dry ice (0.005 mol) to the gel dispersion obtained above, stir and react for 1 hour to obtain a gel-like dispersion suspension of magnesium ethoxide containing carboxylated magnesium ethoxide solution.

[0045] The above-obtained gel-like dispersion suspension was spray-dried (Buchi B290) to obtain solid microsphere particles. The spray conditions...

Embodiment 2

[0052] a) Preparation of Magnesium Ethoxide Microspheres

[0053] With embodiment 1.

[0054] b) Preparation of solid catalyst components

[0055] In a 500mL reaction kettle that has been repeatedly replaced with high-purity nitrogen, add 70mL of toluene and 30mL of titanium tetrachloride, cool down to -5°C, take 10g of the above-mentioned magnesium alkoxide and 50mL of toluene to prepare a suspension, and then mix the prepared Add the suspension to the kettle, slowly raise the temperature to 110°C, add 2.5mL of 4-ethyl-3,5-heptanediol dibenzoate during the heating process, keep the temperature at 110°C for 2 hours, and then press filter the liquid . Then add 120mL of toluene and 30mL of titanium tetrachloride mixed solution and raise the temperature to 110°C and stir for 1 hour, treat like this 3 times, filter off the liquid, wash the obtained solid 4 times with 150mL of hexane, filter off the liquid and dry to obtain solid catalyst components.

[0056] c) Polymerization ...

Embodiment 3

[0059] a) Preparation of Magnesium Ethoxide Microspheres

[0060] With embodiment 1.

[0061] b) Preparation of solid catalyst components

[0062] In a 500mL reaction kettle that has been repeatedly replaced with high-purity nitrogen, add 70mL of toluene and 30mL of titanium tetrachloride, cool down to -5°C, take 10g of the above-mentioned magnesium alkoxide and 50mL of toluene to prepare a suspension, and then mix the prepared Add the suspension into the kettle, slowly raise the temperature to 110°C, add 1.5 mL of diisobutyl phthalate and 1.5 mL of 2-isopropyl-2-isoamyl-1,3-dimethoxypropane during the heating process mL, keep the temperature at 110°C for 2 hours, then press filter the liquid. Then add 120mL of toluene and 30mL of titanium tetrachloride mixed solution and raise the temperature to 110°C and stir for 1 hour, treat like this 3 times, filter off the liquid, wash the obtained solid 4 times with 150mL of hexane, filter off the liquid and dry to obtain solid catal...

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Abstract

The invention discloses a solid catalyst component used for olefin polymerization and a catalytic system thereof. A preparation method comprises the following steps: carrying out spray drying on suspension liquid mixed with an alkoxy magnesium compound in a gel dispersoid form and a carboxylate alkoxy magnesium compound in a solution form to obtain solid spherical particles containing the alkoxy magnesium compound and the carboxylate alkoxy magnesium compound; carrying out a contact reaction on the solid spherical particles, an electron donor compound and a titanic halide in the environment ofan inert liquid medium; continuously carrying out the contact reaction on the solid product and the titanic halide in the environment of the inert liquid medium; and after washing with the inert liquid medium, obtaining the solid catalyst component. The catalytic system comprises the solid catalyst, an organic aluminum compound and an organic silicone compound. The solid polypropylene catalyst component obtained in the invention and the polypropylene powder obtained through polymerization of the catalyst component are of good particle form, and are in high mobility, relatively high in stacking density and relatively low in fine powder content.

Description

technical field [0001] The invention relates to a solid catalyst component for olefin polymerization and its catalytic system, in particular to a solid catalyst component for olefin polymerization prepared from a spherical dialkoxymagnesium carrier and the solid catalyst component as the main catalyst An olefin polymerization catalyst system belongs to the technical field of polyolefin catalysts. Background technique [0002] Ziegler-Natta catalysts are still the main catalysts for olefin polymerization, especially propylene polymerization. For example, in patents such as CN85100997A and CN1453298A, the polypropylene catalyst is generally composed of a solid catalyst component comprising titanium, magnesium, chloride ions and an electron donor compound, an organoaluminum compound as a cocatalyst component and an external catalyst for regulating the stereoregularity of polypropylene. Electron donor composition. At present, the research on catalysts mainly focuses on the fol...

Claims

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Application Information

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IPC IPC(8): C08F10/00C08F110/06C08F4/02C08F4/651C08F4/654C08F4/646
CPCC08F10/00C08F110/06C08F4/02C08F4/651C08F4/6546C08F4/6465C08F2500/12C08F2500/15C08F2500/18
Inventor 朱博源
Owner 朱博源
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