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Solid polypropylene catalyst component

A solid catalyst and carrier technology, applied in the field of solid polypropylene catalyst components, can solve the problem of high fine powder content, and achieve the effect of good particle shape, high bulk specific gravity and uniform distribution

Inactive Publication Date: 2018-11-30
朴蓝聚烯烃科技发展(上海)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 polypropylene catalyst component

Examples

Experimental program
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Effect test

Embodiment 1

[0039] Embodiment 1 (the present invention)

[0040] a) Preparation of Magnesium Ethoxide Microspheres

[0041] 57g (0.5mol) Mg (OC 2 h 5 ) 2 Solid powder and 200ml ethanol are put into the grinding pot of 500ml, grind for 5 hours with the PM-400 ball mill of Germany Lai Chi Company, obtain the Mg(OC 2 h 5 ) 2 suspension.

[0042] Get the Mg(OC 2 h 5 ) 2 100ml of the suspension was transferred to the N 2 In the replaced four-necked reaction flask, add 60ml of ethanol, and use a high-speed disperser (Krupp Supraton TM type S200) at 60° C. for 20 hours to form a gel-like dispersion.

[0043] The above obtained Mg(OC 2 h 5 ) 2 The gel-like dispersion was spray-dried (Buchi B290) to obtain solid microsphere particles. The spray conditions were inlet temperature 210°C, outlet temperature 158°C, feed pump opening 35%, and atomizing gas flow rate 742L / h. The D50 of solid microsphere particles is 25.6 μm.

[0044] b) Preparation of solid catalyst components

[0045] A...

Embodiment 2

[0048] Embodiment 2 (the present invention)

[0049] a) Preparation of Magnesium Ethoxide Microspheres

[0050] With embodiment 1.

[0051] b) Preparation of solid catalyst components

[0052] Add 70ml of toluene and 30ml of titanium tetrachloride to a 500ml reactor that has been repeatedly replaced by high-purity nitrogen, cool down to -5°C, take 10g of the above-mentioned magnesium alkoxide and 50ml of toluene to make a suspension, and then mix the prepared Put the suspension into 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, then press filter the liquid . Then add a mixture of 120ml of toluene and 30ml of titanium tetrachloride 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....

Embodiment 3

[0055] Embodiment 3 (the present invention)

[0056] a) Preparation of Magnesium Ethoxide Microspheres

[0057] With embodiment 1.

[0058] b) Preparation of solid catalyst components

[0059] Add 70ml of toluene and 30ml of titanium tetrachloride to a 500ml reactor that has been repeatedly replaced by high-purity nitrogen, cool down to -5°C, take 10g of the above-mentioned magnesium alkoxide and 50ml of toluene to make a suspension, and then mix the prepared Add the suspension into the kettle, slowly heat up to 110°C, add 1.5ml of diisobutyl phthalate and 1.5ml of 2-isopropyl-2-isoamyl-1,3-dimethoxypropane during the temperature rise ml, keep the temperature at 110°C for 2 hours, and then press filter the liquid. Then add a mixture of 120ml of toluene and 30ml of titanium tetrachloride 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...

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Abstract

The invention relates to a solid catalyst component, and in particular relates to a solid catalyst component used for olefin polymerization. The solid catalyst component is characterized by being prepared by the following steps: spherical alkoxymagnesium is used as a carrier, the spherical alkoxymagnesium is in contact with a titanium halide and an electron donor compound at a certain temperature,and a reaction is performed to obtain the solid catalyst component, wherein the spherical alkoxymagnesium carrier is obtained by spray drying of a suspension of a Mg(OR<1>)(OR<2>) compound dispersedin an inert medium in a gel dispersion manner, and R<1> and R<2> are same or different and individually alkyl having 1-10 carbon atoms. The solid polypropylene catalyst component and polypropylene powder obtained by polymerization of the catalyst component disclosed by the invention have good particle morphology, good fluidity, a higher bulk density, and a lower content of fine powder.

Description

technical field [0001] The invention relates to a solid catalyst component for olefin polymerization prepared from a spherical dialkoxymagnesium carrier, and an olefin polymerization catalyst with the solid catalyst component as the main catalyst. technical background [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, improving the hydrogenation sensitivity of cata...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F10/06C08F4/649C08F4/02
CPCC08F10/06C08F4/6494C08F4/02
Inventor 张文龙王艳丽
Owner 朴蓝聚烯烃科技发展(上海)有限公司
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