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Catalyst component and catalyst for olefin polymerization

A technology for olefin polymerization and catalysts, applied in the field of phosphorus-containing catalyst components and catalysts, to prepare the olefin polymerization catalyst components, can solve the problems of low polymerization activity, achieve good hydrogen adjustment sensitivity, and high melt flow rate , the effect of strong stereodirectional ability

Active Publication Date: 2015-06-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The prepared catalyst is used for propylene polymerization, which can increase the bulk density of polypropylene, but the polymerization activity is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) Preparation of catalyst solid components

[0041] Under nitrogen protection, add 4.8g of anhydrous magnesium chloride, 19.5g of isooctyl alcohol and 19.5g of decane solvent into a 500ml reactor equipped with a stirrer, heat to 130°C, react for 1.5 hours until magnesium chloride is completely dissolved, and add 1.1g Phthalic anhydride, continue to react at 130°C for 1 hour to obtain an alcoholate; cool the alcoholate to room temperature. Under the protection of nitrogen, the above alcoholate was added dropwise to 120ml of titanium tetrachloride solution pre-cooled to -22°C, and the temperature was slowly raised to 100°C, 10mmol of diisobutyl phthalate compound was added, and the temperature was raised to 110°C Maintain ℃ for 2 hours, filter while hot, add 120 ml of titanium tetrachloride, rise to 110 ℃ for 1 hour, filter. Add 80ml of toluene and 2.66g of tributyl phosphate, and maintain at 90°C for half an hour. The solid particles were washed 4 times with anhydrou...

Embodiment 2

[0045] With embodiment 1, difference is to add tributyl phosphate 1.33g. Aggregated data are shown in Table 1.

Embodiment 3

[0047] Same as Example 1, except that 5.3 g of triethyl phosphate was added. Aggregated data are shown in Table 1.

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Abstract

The invention provides a catalyst component for olefin polymerization. The catalyst component is prepared by: mixing a magnesium compound, an organic alcohol compound and an inert solvent, and adding an precipitation assistant to obtain an alcohol adduct; contacting the alcohol adduct with a titanium compound solution, then adding an internal electron donor compound and allowing them to react, conducting filtration to separate solid particles; adding the solid particles into the titanium compound solution, carrying out stirring and allowing them to react, and conducting filtration to separate solid particles; washing the solid particles by the inert solvent, and performing drying. Specifically, a phosphorus-containing compound, which can be alkyl ester or halogenated alkyl ester of orthophosphoric acid or phosphorous acid, an alkyl or aryl phosphine compound or a mixture thereof, is added during the steps. And the phosphorus content of the catalyst component is 0.2-3.0wt%. When the catalyst is used for olefin polymerization, especially propylene polymerization, a polymer with a high isotactic index and a high melt flow rate can be obtained.

Description

technical field [0001] The present invention relates to the field of olefin polymerization catalysts. Further, the present invention specifically relates to a phosphorus-containing catalyst component and catalyst. The present invention also relates to a process for preparing said olefin polymerization catalyst component. Background technique [0002] Stereoregularity and melt flow rate are two important indicators of polyolefins. Polyolefin products with high stereoregularity have high rigidity and crystallization properties, which are conducive to the production of high-strength products. Stereoregularity can usually be measured by isotactic index or xylene soluble content. Melt flow rate is a measure of a polymer's ability to flow under certain conditions. Melt flow rate provides an indicator of the processing properties of polymer resins, such as polymer resins must be softened or melted during extrusion or molding. The method of thermally degrading the polymer by pe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F10/00C08F4/646C08F4/654C08F10/02C08F10/06
Inventor 张晓帆高明智刘海涛李昌秀王军李现忠马晶蔡晓霞马吉星陈建华杨丽娜林洁
Owner CHINA PETROLEUM & CHEM CORP
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