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Olefin polymerization catalyst component and its preparation method and olefin polymerization catalyst and its application

An olefin polymerization and catalyst technology, which is applied to the olefin polymerization catalyst component and its preparation and the olefin polymerization catalyst and its application field, can solve the problem of low polypropylene regularity, products requiring de-random, stereospecificity and polymerization activity not good. It can achieve high stereospecificity and high polymerization activity.

Active Publication Date: 2018-08-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the effect of compounding is not a simple superposition of the properties of several electron donors.
For example, the isotacticity of polypropylene generally obtained from catalysts using monocarboxylic acid esters as internal electron donors is low, and the product needs to remove random substances.
And WO03002617 discloses a catalyst component and a catalyst for olefin polymerization obtained by using a monocarboxylic acid ester and a dicarboxylic acid ester in combination. The hydrogen adjustment sensitivity of the catalyst is good, but the stereospecificity and polymerization activity are still not very high

Method used

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  • Olefin polymerization catalyst component and its preparation method and olefin polymerization catalyst and its application
  • Olefin polymerization catalyst component and its preparation method and olefin polymerization catalyst and its application
  • Olefin polymerization catalyst component and its preparation method and olefin polymerization catalyst and its application

Examples

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preparation example Construction

[0083] 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 Obtain spherical alcohol adducts of magnesium dichloride, wherein, R 0 for C 1 -C 18 Hydrocarbyl, preferably C 1 -C 5 Alkyl groups, more preferably methyl, ethyl, n-propyl and isopropyl. Magnesium dichloride and R 0 The molar ratio of OH can be 1:1-6, preferably 1:2-4.

[0084] 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 vaselin...

Embodiment 1

[0123] This example is used to illustrate the olefin polymerization catalyst component, olefin polymerization catalyst and olefin polymerization method of the present invention.

[0124] In a 300mL stirred glass reaction flask fully replaced with high-purity nitrogen, add 0.912mol of titanium tetrachloride and 10mL of hexane, cool to -20°C, add 8g (0.0372mol) of spherical magnesium chloride alcoholate (MgCl 2 2.6C 2 h 5 OH, synthesized with magnesium dichloride and ethanol according to the method disclosed in CN1330086A), under stirring, slowly heat up in stages, add 2,4-pentanediol dibenzoate (internal electron donor compound a) 5mmol , 2-isopropyl-2-isoamyl-1,3-dimethoxypropane (internal electron donor compound b) 5mmol and epichlorohydrin (internal electron donor compound c) 1.5mmol, continue to heat up to 110°C, after reaching the temperature and keeping the temperature for 0.5h, remove the liquid by suction filtration, and add titanium tetrachloride to the solid phase o...

Embodiment 2

[0128] This example is used to illustrate the olefin polymerization catalyst component, olefin polymerization catalyst and olefin polymerization method of the present invention.

[0129] The olefin polymerization catalyst component was prepared according to the method of Example 1, and the polypropylene was prepared according to the method of Example 1, except that no cyclohexylmethyldimethoxysilane was introduced during the propylene polymerization process. The isotactic index and ash content of the obtained polypropylene and the test results of the polymerization activity of the catalyst are shown in Table 1.

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Abstract

The present invention discloses an olefin polymerization catalyst component and a preparation method thereof and an olefin polymerization catalyst and application thereof. The catalyst component comprises the following the reaction product components: (i) a magnesium-containing compound; (ii) a titanium-containing compound; and (iii) an internal electron donor; wherein the internal electron donor is a combination of an internal electron donor compound a, an internal electron donor compound b and an internal electron donor compound c, the internal electron donor compound a is a diol ester compound shown as a formula I, the internal electron donor compound b is a diether compound shown as a formula II, and the internal electron donor compound c is an alkylene oxide compound shown as a formula III. The olefin polymerization catalyst component during being used in olefin polymerization has high stereoregularity orientation property, meanwhile polymerization activity is high, and a high isotactic index and low ash content olefin polymer can be obtained in the condition of no use or a very small amount of use of an external electron donor.

Description

technical field [0001] The invention relates to an olefin polymerization catalyst component and its preparation method, an olefin polymerization catalyst and its application. 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 components, which plays a decisive role in important indicators such as polymerization activity, polymer isotactic index, molecular weight and molecular weight distribution. With the development of internal electron donor compounds, polyolefin catalysts are constantly updated. [0003] Catalysts with different internal electron donors have different characteristics, for example, some catalysts have higher polymerization acti...

Claims

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Application Information

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IPC IPC(8): C08F10/00C08F4/649C08F4/646C08F4/645
Inventor 赵瑾夏先知刘月祥谭扬高平凌永泰李威莅高富堂张纪贵彭人琪
Owner CHINA PETROLEUM & CHEM CORP
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