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Catalyst component for alkene polymerization reactions and preparation method of catalyst prepared from the catalyst component

A technology for olefin polymerization and catalysts, which is applied in the field of solid catalyst components and catalysts, and can solve problems such as narrow molecular weight distribution of polymers, difficulty in processing, and decrease in isotacticity of polymers.

Active Publication Date: 2014-03-12
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned disclosed catalysts prepared with diether compounds as internal electron donors generally have the defects of narrow polymer molecular weight distribution and difficulty in processing in the practical application of olefin polymerization; Among the catalyst components of the reaction, 2-n-pentyl-2-(2-ethylhexyl)-1,3-dimethoxypropane, 2-isopentyl-2-benzyl-1,3- 1,3-diether compounds such as dimethoxypropane are used as electron donors. Although the molecular weight distribution of polymers can be broadened in the practical application of olefin polymerization with such catalysts, in the polymerization process, when the polymerization is increased The concentration of hydrogen will lead to a sharp decrease in the isotacticity of the polymer. Not only can the concentration of hydrogen not be used to adjust the molecular weight of the final polymer, but it will also easily cause blockage of the reaction equipment, making it difficult to realize industrial production.

Method used

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  • Catalyst component for alkene polymerization reactions and preparation method of catalyst prepared from the catalyst component
  • Catalyst component for alkene polymerization reactions and preparation method of catalyst prepared from the catalyst component
  • Catalyst component for alkene polymerization reactions and preparation method of catalyst prepared from the catalyst component

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] In the reactor fully replaced by high-purity nitrogen, 4.8g of magnesium chloride, 95ml of toluene, 4ml of epichlorohydrin, and 12.5ml of tributyl phosphate were sequentially added, and the temperature was raised to 50°C under stirring, and maintained for 2.5 hours, and the solid was completely dissolved. Add 1.4 g of phthalic anhydride and continue for 1 hour. Cool the solution to below -25°C and add TiCl dropwise within 1 hour 4 56ml, slowly warming up to 80°C, adding the compound 2-n-pentyl-2-(2-ethylhexyl)-1,3-dimethoxypropane 3mmol and 9,9-bis(methylmethoxy)fluorene 3mmol, maintain the temperature for 1 hour, filter, add 70ml of toluene, and wash twice. Add 60ml of toluene, TiCl 4 40ml, heated up to 110°C, maintained for 2 hours, and repeated once. After filtration, 60 ml of toluene was added and washed twice to obtain a solid precipitate. Add 60 ml of hexane again, and wash four times. A solid catalyst component is obtained. The catalyst components prepared ...

Embodiment 2

[0056] Same as Example 1, the difference is that the temperature is raised to 80°C, and the "compound 2-n-pentyl-2-(2-ethylhexyl)-1,3-dimethoxypropane 3mmol and 9,9-2 (Methylmethoxy) fluorene 3mmol" was replaced by "Add compound 2-n-pentyl-2-(2-ethylhexyl)-1,3-dimethoxypropane 2mmol and 9,9-bis(methyl Methoxy) fluorene 4mmol", the specific results are shown in Table 1.

Embodiment 3

[0058] Same as Example 1, the difference is that the temperature is raised to 80°C, and the "compound 2-n-pentyl-2-(2-ethylhexyl)-1,3-dimethoxypropane 3mmol and 9,9-2 (Methylmethoxy) fluorene 3mmol" was replaced with "Add compound 2-n-pentyl-2-(2-ethylhexyl)-1,3-dimethoxypropane 4mmol and 9,9-bis(methyl Methoxy) fluorene 2mmol, the specific results are shown in Table 1.

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Abstract

The invention provides a catalyst component for alkene polymerization reactions and a preparation method of a catalyst prepared from the catalyst component. The catalyst component comprises a magnesium compound, a titanium compound, and a reaction product of two diether electron donor compounds a and b. When the catalyst is applied to propylene polymerization, a satisfactory polymerization yield can be obtained, furthermore the polymer obtained has the advantages of high isotacticity, wide molecular weight distribution range, and good sensitivity to hydrogen, and even under a polymerization condition of high hydrogen gas concentration, the isotacticity of the polymer can still be maintained in a high level, and thus the requirement of the industrial production is satisfied.

Description

technical field [0001] The invention relates to a solid catalyst component for olefin polymerization and its catalyst, more specifically, to a catalyst component composed of two electron donors as an internal electron donor and its application. technical background [0002] It is well known that solid titanium catalyst components based on magnesium, titanium, halogen and electron donors can be used in olefin polymerization reactions, especially in the polymerization of α-olefins with 3 or more carbon atoms, where the electron donor Compound is one of the essential components in catalyst components, and the development of internal electron donor compounds has led to the continuous replacement of polyolefin catalysts. At present, binary aromatic carboxylic acid esters are commonly used, such as di-n-butyl phthalate or diisobutyl phthalate, etc., such as Chinese patent CN85100997A. [0003] In recent years, people have attempted to adopt other compounds, such as diethers, as e...

Claims

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Application Information

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IPC IPC(8): C08F10/00C08F4/645C08F4/649
Inventor 高明智蔡晓霞刘海涛李季禹马吉星陈建华张晓帆王军李昌秀李现忠马晶胡建军
Owner CHINA PETROLEUM & CHEM CORP