Catalyst component for olefin polymerization and catalyst thereof

An olefin polymerization and catalyst technology, which is applied in the field of olefin polymerization catalyst components and catalysts, can solve the problems of low melt flow index, etc., and achieve the effects of good hydrogen adjustment sensitivity, high melt flow rate, and high tactic index.

Active Publication Date: 2013-04-24
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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  • Catalyst component for olefin polymerization and catalyst thereof
  • Catalyst component for olefin polymerization and catalyst thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] (1) Preparation of catalyst solid components

[0042] 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

[0047] Same as Example 1, except that 0.9 g of tributyl phosphate was added. Aggregated data are shown in Table 1.

Embodiment 3

[0049] 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 through 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. Specifically, a phosphorus-containing compound is added during the steps, and the phosphorus content in the catalyst component is 0.2-3.0wt%. The internal electron donor compound contains at least one diol ester compound selected from the following general formula (I). 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, a polymer with a high melt flow rate and a high isotactic index can be obtained.

Description

technical field [0001] The invention relates to an olefin polymerization catalyst component and the catalyst. More specifically, the present invention relates to a phosphorus-containing catalyst component and a catalyst component which use a diol ester compound as an internal electron donor. 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, and can usually be measured by isotactic index. Melt flow rate is a measure of a polymer's ability to flow under certain conditions and provides an indicator of the processing properties of a polymer resin, such as extrusion or molding, where the polymer resin must be softened or melted. The method of peroxide thermal degradation of the polymer during the extrusion process by controlling the rheology usually brings a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F10/00C08F4/654C08F4/651C08F4/649C08F4/02C08F10/02C08F10/06
Inventor 高明智马吉星张晓帆刘海涛王军李昌秀李现忠马晶蔡晓霞陈建华段瑞林张志会丁春敏
Owner CHINA PETROLEUM & CHEM CORP
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