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Solid catalyst component for olefin polymerization

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

Active Publication Date: 2019-03-22
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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  • 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 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.

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

[0046] The gel-like dispersion suspension obtained above w...

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. The solid catalyst component is characterized by being prepared through the following steps: spraying and drying a suspension solution mixed with an alkoxy magnesium compound with a gel dispersoid shape and a magnesium chloride solution to obtain solid spherical particles containing the alkoxy magnesium compound and magnesium chloride; carrying out contact reaction on the solid spherical particles, an electron donor compound and halide of tetravalent titanium in the presence of an inert liquid medium; carrying out the contact reaction on an obtained solid product and the halide of the tetravalent titanium in the presence of the inert liquid medium; washing an obtained solid product with the inert liquid medium toobtain the spherical solid catalyst component. A chemical structural formula of the alkoxy magnesium compound is Mg(OR1)(OR2), wherein R1 and R2 are alkyl with 2 to 10 carbon atoms. The solid polypropylene catalyst component and polypropylene powder obtained by polymerizing the catalyst component have the advantages of good particle shape, good flowability, relatively high bulk density and relatively 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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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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