Method for preparing alkoxyl magnesium solid particles

A technology of magnesium alkoxide and magnesium oxide, which is applied in the field of preparation of magnesium alkoxide solid particles, can solve the problems of not being able to fully meet the requirements of high-performance olefin catalysts, being difficult to apply to industrialized production, and unable to obtain round particles, etc. , to achieve the effect of excellent particle shape, good particle shape maintenance, and easy control of the reaction

Inactive Publication Date: 2010-12-08
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

For example: in the first method, the shape of the particles is crushed and destroyed. If you want to obtain particles with complete surface morphology and particle size distribution, you have to pay a lower output rate, so it is difficult to apply to industrial production.
In Method 2, although the range of the final magnesium/ethanol addition ratio is specified as 9/1-1/15, it is found through research that if sufficient stirring is not carried out in the second half of

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  • Method for preparing alkoxyl magnesium solid particles

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Embodiment 1

[0047] Example 11: Use the alkoxymagnesium particles prepared by the present invention to prepare solid catalyst components: In a 300ml reactor that has been repeatedly replaced with high-purity nitrogen, add 10ml of refined toluene and 90ml of titanium tetrachloride, and cool down to - 5°C, add the suspension prepared in advance with 10g of magnesium alkoxide obtained in Example 1 and 50ml of toluene, then slowly heat up to 80°C, add 2ml of DNBP (dibutyl phthalate), continue to heat up to 115°C, and keep the temperature constant 2 hours, and then filter the liquid clean. Then add a mixture of 120ml titanium tetrachloride and 30ml toluene and raise the temperature to 110°C and stir for 1 hour. Treat like this 3 times, filter off the liquid, wash the resulting solid with 150ml hexane at 60°C for 4 times, filter off the liquid and dry , Obtaining 10.5g of solid powder was the solid catalyst component, and the titanium content was determined to be 2.65 (wt)% by spectrophotometry....

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Abstract

The invention provides a method for preparing spherical alkoxyl magnesium particles with excellent properties. In the method, magnesium, alcohol and a halogenating agent are reacted at a reflux temperature, so that the alkoxyl magnesium particles are obtained. The alkoxyl magnesium particles have the advantages of higher bulk density, good particle shape and particular suitability for serving as a catalyst carrier of an olefin polymerization reaction.

Description

technical field [0001] The invention relates to a preparation method of alkoxymagnesium solid particles, more specifically, to a spherical alkoxymagnesium solid particle with a high bulk density and an average particle diameter of 10-80 μM, which can be used to prepare olefin polymerization catalysts The preparation method and the spherical alkoxymagnesium particles obtained by the preparation method. Background technique [0002] As we all know, olefin polymers are usually obtained by polymerization under the catalysis of Ziegler-Natta catalysts composed of titanium compounds and organoaluminum compounds. For example, in the preparation process of polypropylene, generally, the catalyst uses a solid catalyst component composed of magnesium, titanium, halogen and an electron donor compound as the main catalyst component, an organoaluminum compound as the auxiliary catalyst component and as a stereoregularity The enhancer contains organosilicon compounds with alkoxy groups as...

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Application Information

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IPC IPC(8): C07C29/70C07C31/28C08F4/02C08F4/06
Inventor 谭忠徐秀东严立安宋维玮李凤奎尹珊珊于金华周凌
Owner CHINA PETROLEUM & CHEM CORP
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