A solid catalyst component for olefin polymerization

A solid catalyst and olefin polymerization technology, which is applied in the field of olefin polymerization catalysts, can solve the problem of high fine powder content, and achieve the effects of good particle shape, high bulk specific gravity, and high bulk density

Active Publication Date: 2021-07-30
上海葛蓝化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

By controlling the bulk density of dialkoxymagnesium, the average particle size and other indicators, and controlling the rate at which the titanium halide starts to contact with dialkoxymagnesium to the temperature at which the reaction occurs (the heating rate is controlled at 0.5 to 20 / min Between), so as to obtain a solid catalyst component, thus can obtain a polyolefin with high isotactic and high bulk density, but its fine powder content is relatively high

Method used

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  • A solid catalyst component for olefin polymerization

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] a) Preparation of Magnesium Ethoxide Microspheres

[0043] 57g (0.5mol) Mg (OC 2 h 5 ) 2 Solid powder and 200mL ethanol are put into the grinding pot of 500mL, grind 5 hours with the PM-400 ball mill of Germany Lei Chi Company, obtain the Mg(OC 2 h 5 ) 2 suspension.

[0044] Get the Mg(OC 2 h 5 ) 2 100 mL of the suspension was transferred to the N 2 In the replaced four-necked reaction flask, add 50mL ethanol, and use a high-speed disperser (Krupp Supraton TM type S200) at 50° C. for 12 hours to form a gel-like dispersion.

[0045] Add 50 mL of ethanol and 2.38 g of magnesium chloride (0.025 mol) through molecular sieve drying into the four-necked reaction flask replaced by N2, transfer to the above-mentioned gel dispersion after stirring and dissolving to obtain the ethoxymagnesium gel containing magnesium chloride solution disperse suspension.

[0046] The gel-like dispersion suspension obtained above was spray-dried (Buchi B290) to obtain solid microspher...

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 for olefin polymerization, which is characterized in that the suspension mixed with alkoxymagnesium compound and magnesium chloride solution in the form of gel dispersion is spray-dried to obtain the alkoxymagnesium compound and solid spherical particles of magnesium chloride; contacting the solid spherical particles with the electron donor compound and the halide of tetravalent titanium in the presence of an inert liquid medium; reacting the obtained solid product with the halide of tetravalent titanium in the presence of an inert liquid medium Contact reaction; the solid product obtained by washing with an inert liquid medium to obtain a spherical solid catalyst component; the chemical structural formula of the alkoxymagnesium compound is Mg(OR 1 )(OR 2 ), where R 1 , R 2 is an alkyl group having 2-10 carbon atoms. The solid polypropylene catalyst component and the polypropylene powder obtained by polymerizing the catalyst component have good particle shape, good fluidity, high bulk density and low fine powder content.

Description

technical field [0001] The invention relates to a solid catalyst component for olefin polymerization, especially prepared from composite alkoxymagnesium microsphere particles, and further relates to an olefin polymerization catalyst with the solid catalyst component as the main catalyst. Background technique [0002] Ziegler-Natta catalysts are still the main catalysts for olefin polymerization, especially propylene polymerization. For example, in patents such as CN 85100997A and CN 1453298A, the polypropylene catalyst generally consists of a solid catalyst component composed of titanium, magnesium, chloride ions and an electron donor compound, an organoaluminum compound as a co-catalyst component and a control of polypropylene stereoregularity. The composition of the external electron donor. At present, the research on catalysts mainly focuses on the following aspects: improving the polymerization activity of catalysts, improving the stereoregularity of polyolefins, improv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F10/00C08F110/06C08F4/02C08F4/649
CPCC08F10/00C08F110/06C08F4/02C08F4/649
Inventor 刘宏祥
Owner 上海葛蓝化工科技有限公司
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