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Preparation methods for olefin polymerization catalyst component and corresponding catalyst

A technology for olefin polymerization and catalysts, which is applied in the field of rapid preparation of olefin polymerization catalyst components, and can solve the problems of irregular particle shape, high polymer fine powder, unfavorable industrial production, etc.

Active Publication Date: 2014-01-15
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, because the choice of co-solvent will greatly affect the performance of the catalyst, most of the co-agents that help to dissolve are polar reagents, which will lead to a decrease in the activity of the catalyst and irregular particle shapes during the preparation of the catalyst, resulting in Too much polymer fine powder is obtained, which is not conducive to industrial production

Method used

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  • Preparation methods for olefin polymerization catalyst component and corresponding catalyst
  • Preparation methods for olefin polymerization catalyst component and corresponding catalyst
  • Preparation methods for olefin polymerization catalyst component and corresponding catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Preparation of olefin polymerization catalyst components: In an atmospheric pressure reactor repeatedly replaced by high-purity nitrogen, 4.8 grams of anhydrous magnesium chloride, 70 milliliters of toluene, 4.0 milliliters of epichlorohydrin, 12.5 milliliters of tributyl phosphate, 2.0 milliliters of Tetraethoxysilane and 0.2 milliliters of N-methylpyrrolidone were reacted for 35 minutes at a temperature of 60°C, 1.4 grams of phthalic anhydride (co-extrusion aid) and 30 milliliters of toluene were added, and the reaction was continued for one hour. Cool down to -28°C, add 56ml of titanium tetrachloride dropwise (dropping rate: 1ml / min), gradually raise the temperature to 85°C (heating rate: 5°C / min), add 1.1ml of phthalic acid at 80°C Di-n-butyl ester (DNBP, internal electron donor), keep the temperature for one hour, filter, wash the solid twice with toluene, then add 48 ml of titanium tetrachloride and 72 ml of toluene, keep the temperature at 110 ° C for 0.5 hours an...

Embodiment 1B

[0044] The catalyst component is used to catalyze the polymerization of propylene (Example 1B): only change "1 liter of hydrogen under standard state" in Example 1A to "4 liters of hydrogen under standard state", and the rest are the same as in Example 1A.

Embodiment 2

[0046] Preparation of olefin polymerization catalyst components: The experimental conditions were basically the same as those in Example 1, except that the amount of N-methylpyrrolidone was changed to 0.5 ml, and the reaction time at 60° C. was changed to 25 minutes. In the prepared olefin polymerization catalyst component, by weight, the content of titanium is 1.9%, the content of DNBP is 10.2%, the content of diethyl phthalate (DEP) is 0.3%, the content of silicon is 0.08%, and the content of magnesium is 18%. %, chlorine content 57%, phosphorus content 0.11%.

[0047] The catalyst component is used to catalyze the polymerization of propylene (Example 2A): the experimental conditions are basically the same as in Example 1A, except that the catalyst component prepared in Example 2 is used instead, and the specific results are shown in Table 1.

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Abstract

The invention provides a preparation method for an olefin polymerization catalyst component. The preparation method comprises the steps: contacting a magnesium compound, an organophosphorus compound, a pyrrolidone compound and an organic epoxy compound in a solvent to form a uniform solution; in the presence of a precipitation aiding agent, contacting the uniform solution with a titanium compound to obtain a mixture; and then contacting the obtained mixture with an internal electron donor compound, and carrying out a reaction to obtain the olefin polymerization catalyst component, wherein at least one of the magnesium compound and the titanium compound is a halogen-containing compound. According to the preparation method, the addition of the pyrrolidone compound and the organosilane compound can effectively shorten the preparation time of the catalyst component, improve the particle morphology of a catalyst and greatly reduce the fine powder content of the polymer; and at the same time, the catalyst activity is substantially improved, the apparent density of the polymer is relatively high, and the degree of isotacticity and the polymer melt flow index still maintain original relatively good performance of the catalyst.

Description

technical field [0001] The invention relates to a method for rapidly preparing olefin polymerization catalyst components and corresponding catalysts. Background technique [0002] At present, the conventional preparation method of olefin polymerization catalyst is co-precipitation method. Magnesium halide is dissolved in a solvent system to form a uniform solution, and then active magnesium halide is precipitated with titanium halide, and the titanium active component is loaded on it at the same time. Patent CN85100997A discloses a catalyst system for olefin polymerization and copolymerization, which catalyst system includes: a Ti-containing solid catalyst component, an alkyl aluminum compound and organosilicon, wherein the preparation method of the Ti-containing solid catalyst component is , Magnesium halide is dissolved in organic epoxy compound and organic phosphorus compound to form a uniform solution, the solution is mixed with titanium tetrahalide or its derivatives, i...

Claims

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Application Information

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IPC IPC(8): C08F10/00C08F110/06C08F4/649
Inventor 付梅艳郭正阳任春红王宇王迎雷世龙刘翠莲洪挺
Owner CHINA PETROLEUM & CHEM CORP
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