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Preparation method for solid catalyst component for olefin polymerization

A solid component and olefin polymerization technology, which is applied in the field of preparation of supported Ziegler-Natta catalyst solid components, can solve the problems of high price and high catalyst cost, achieve less polymer fine powder, reduce post-processing steps, The effect of good fluidity

Active Publication Date: 2005-06-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process of preparing catalysts using dialkylmagnesium as a raw material leads to increased catalyst costs because dialkylmagnesium is expensive and difficult to obtain

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0026] The following example prepares the Mg-Ti complex described in the present invention.

[0027] A three-neck reaction flask with a magnetic stirring device was filled with N 2 Fully replace, and add 1.0 g Mg powder, 0.1 g I 2 and 50 mL of dichloromethane. Stir at 40°C for 2 hours, add 8 milliliters of n-butanol to react for 8 hours, then add 22 milliliters of tetrahydrofuran to obtain a uniform and clear solution, lower the temperature to room temperature, then slowly add 2.28 milliliters of titanium tetrachloride dropwise, and fully stir for 2 hours. A clear yellow Mg-Ti complex solution a was formed with a magnesium content of 12.5 mg / ml.

example 2

[0029] Prepare the Mg-Ti complex according to the method of Example 1, except that the addition of titanium tetrachloride is 1.14 milliliters to obtain a yellow and clear Mg-Ti complex solution b, wherein the magnesium content is 13.0 mg / ml.

example 3

[0031] Mg-Ti complex was prepared by the method of Example 1, except that 4.75 milliliters of ethanol was used instead of n-butanol to obtain a yellow and clear Mg-Ti complex solution c, wherein the magnesium content was 13.3 mg / ml.

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Abstract

The preparation process of the solid component of olefin polymerizing catalyst includes first reaction of C2-C8 alcohol and magnesium powder in the molar ratio of 2.0-4.0 in the presence of methane halide to form homogeneous magnesium ligand solution; subsequent addition of electron donor compound to form homogeneous solution and the reaction between the solution with titanium compound to form Mg-Ti ligand solution; the contact reaction between the solution with inorganic oxide carrier to prepare solid catalyst precursor; and final activation of the precursor with alkyl aluminum chloride to obtain the solid catalyst. The solid component of catalyst of the present invention is matched with alkyl aluminum for the polymerization of ethylene and has high catalytic activity and polymer prepared with very small amount of fine powder.

Description

technical field [0001] The invention relates to a method for preparing a solid component of an olefin polymerization catalyst, in particular to a method for preparing a supported Ziegler-Natta catalyst solid component. Background technique [0002] At present, the high-efficiency Ziegler-Natta catalyst system widely used in industry comprises a Ziegler-Natta catalyst solid component and a cocatalyst, usually an organoaluminum compound. The solid component of the catalyst is composed of titanium halide supported on magnesium compound or other supports. Usually, titanium tetrachloride is supported on magnesium chloride to obtain a solid component of a high-efficiency Ziegler-Natta catalyst. [0003] The particle morphology and particle distribution of the solid component of the catalyst are crucial to the performance of the catalyst, and a narrow particle distribution is conducive to the stable operation of the production equipment. Especially in the gas phase polyethylene p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F4/02C08F4/646C08F10/02
Inventor 荣峻峰周旭华林伟国毛国芳黄绪耕张巍景振华刘伟
Owner CHINA PETROLEUM & CHEM CORP
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