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Catalyst component, catalyst and method for olefin polymerization

A technology of olefin polymerization and catalyst, which is applied in the field of olefin polymerization catalyst components, olefin polymerization catalysts and olefin polymerization, can solve the problems of low polymerization yield, low isotactic index, etc., and achieve the effect of high polymerization activity

Active Publication Date: 2014-12-31
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As can be seen from the polymerization results reported in the above application, the disadvantages of using malonate internal electron donors are lower polymerization yields and / or lower isotactic index

Method used

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  • Catalyst component, catalyst and method for olefin polymerization

Examples

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preparation example Construction

[0063] Generally, the preparation method of the alcohol adduct of described spherical magnesium dichloride can comprise: by magnesium dichloride and R 0 OH is subjected to high shear at a temperature of 90-140°C in the dispersion medium, and then the obtained reaction product is placed in a cooling medium at a temperature of -20°C to 0°C to form spherical particles, which can be washed and dried A spherical alcohol adduct of magnesium dichloride is obtained. The high shear method can be, for example, the method disclosed in CN1330086, the method disclosed in US6020279, the method disclosed in CN1580136A and the method disclosed in CN1463990A. The dispersion medium may be a hydrocarbon solvent such as kerosene, white oil, silicone oil, paraffin oil and vaseline oil. The cooling medium can be pentane, hexane, heptane, petroleum ether and raffinate oil in the petroleum refining process.

[0064] A catalyst component obtained by reacting the alcohol adduct of magnesium dichlorid...

Embodiment 1

[0099] This example is used to illustrate the olefin polymerization catalyst component, olefin polymerization catalyst and olefin polymerization method of the present invention.

[0100] In a 300ml stirred glass reaction bottle fully replaced with high-purity nitrogen, add 90mL of titanium tetrachloride, cool to -20°C, and add 8g of spherical magnesium dichloride alcohol adduct (MgCl 2 2.6C 2 h 5 OH, synthesized with magnesium dichloride and ethanol according to the method disclosed in CN1330086A), the temperature was slowly raised to 110°C in stages, and diethyl ethoxymethylene malonate (internal electron donor compound a, Formula II, R' 1 is ethoxy, R 3 and R 4 is ethyl) 0.0025 mol and 2,4-pentanediol dibenzoate (internal electron donor compound b) 0.0067 mol, kept at 110 ° C for 0.5 h, filtered off the liquid, and poured into the solid phase obtained by filtration Add 80 mL of titanium tetrachloride and stir twice, then wash with 60 mL of hexane five times, and dry in ...

Embodiment 2

[0103] This example is used to illustrate the olefin polymerization catalyst component, olefin polymerization catalyst and olefin polymerization method of the present invention.

[0104] The olefin polymerization catalyst component was prepared according to the method of Example 1, except that 0.005 mol of diethyl ethoxymethylene malonate was added to obtain catalyst component A2.

[0105] And prepare polypropylene according to the method of embodiment 1, the amount of hydrogen added is shown in table 1. Table 1 shows the test results of the isotactic index of the obtained polypropylene and the polymerization activity of the catalyst.

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Abstract

The invention provides a catalyst component, a catalyst and a method for olefin polymerization. The catalyst component comprises magnesium, titanium, halogen and an internal electron donor, the internal electron donor comprises an internal electron donor compound a and an internal electron donor compound b with the mole ratio of 0.007-2:1, the internal electron donor compound a is a malonate compound shown as the formula I / II, the internal donor compound b is a diol ester compound shown as the formula III, and the catalyst component uses the malonate compound and the diol ester compound as internal electron donor compounds, so that when the catalyst component is used for olefin polymerization, the catalyst component has higher vertical structural capacity, a polymer with high isotactic index can be obtained, and the catalyst component has high activity.

Description

technical field [0001] The present invention relates to an olefin polymerization catalyst component, an olefin polymerization catalyst and an olefin polymerization method. Background technique [0002] It is well known that solid titanium-based catalyst components based on magnesium, titanium, halogen and electron donor compounds are used for olefin polymerization, especially for propylene polymerization, with high polymerization activity and stereospecificity. Among them, the electron donor compound is one of the essential components in the catalyst component, which plays a decisive role in important indicators such as polymerization activity, polymer isotacticity, molecular weight and molecular weight distribution. The development of polyolefin catalysts is constantly updated. [0003] Phthalate ester compounds are currently the most commonly used electron donors for polypropylene catalysts, and according to research, they can cause serious damage to the growth and develo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F10/00C08F4/649C08F10/06
Inventor 夏先知赵瑾刘月祥谭扬高富堂高平凌永泰彭人琪李威莅张纪贵
Owner CHINA PETROLEUM & CHEM CORP
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