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Catalyst component for olefin polymerization and catalyst thereof

An olefin polymerization and catalyst technology, which is applied in the field of phosphorus-containing catalyst components and catalysts, can solve the problems of low melt flow index, etc. Effect

Active Publication Date: 2015-07-22
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The catalyst is used for propylene polymerization, and can obtain products with higher isotactic index, but the melt flow index is lower

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Preparation of catalyst solid components

[0039] In a 250ml reactor equipped with a reflux condenser, a mechanical stirrer and a thermometer and fully replaced by nitrogen, add 36.5ml of absolute ethanol, 21.3g of anhydrous magnesium chloride, heat up under stirring, and add 75ml of white oil after the magnesium chloride is completely dissolved. Silicone oil 75ml, maintain 120 ℃ for a certain period of time. In another reaction bottle with a volume of 500ml and a high-speed stirrer, 112.5ml of white oil and the same volume of silicone oil were added in advance, preheated to 120°C, and the aforementioned mixture was quickly pressed into the second reactor and maintained at 120°C. °C was stirred at 3500rmp for 3 minutes, and under stirring, the material was transferred to the third reactor that had previously added 1600ml of hexane and cooled to -25 °C until the material transfer was completed, and the final temperature did not exceed 0 °C. Suction filtration, washi...

Embodiment 2

[0044] With embodiment 1, difference is to add tributyl phosphate 1.33g. Aggregated data are shown in Table 1.

Embodiment 3

[0046] Same as Example 1, except that 3.8 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: dispersing an alcohol adduct melt of magnesium halide in a dispersing agent system of white oil and silicone oil to form an emulsion, discharging the emulsion into a cooling liquid to perform cooling shaping, thus forming a magnesium halide alcohol adduct microsphere, washing and drying the magnesium halide alcohol adduct microsphere to form a spherical carrier; and then treating the spherical carrier by a titanium compound, raising the temperature gradually, adding an internal electron donor during treatment, and after treatment, carrying out washing with an inert solvent, and performing drying, thus obtaining the spherical catalyst component. 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 in 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. Particularly under a high hydrogen concentration condition, a polymer with a high melt flow rate and a high isotactic index can be obtained.

Description

technical field [0001] The present invention relates to an olefin polymerization catalyst component and catalyst, more particularly, to a phosphorus-containing catalyst component and catalyst. 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 peroxide during the extrusion process by controlling the rheology technology can improve the melt fluidity of the polymer, but it usua...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F10/00C08F4/646C08F4/654C08F4/02C08F10/02C08F10/06
Inventor 张晓帆马吉星高明智刘海涛陈建华蔡晓霞王军李昌秀李现忠马晶林洁杨丽娜丁春敏
Owner CHINA PETROLEUM & CHEM CORP
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