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Catalyst component for alkene polymerization reaction and preparation method of catalyst thereof

An olefin polymerization and catalyst technology, which is applied in the field of olefin polymerization catalyst components and the preparation of the catalyst, can solve the problems of narrow molecular weight distribution of polymers, decrease of polymer isotacticity, clogging of reaction equipment, etc.

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 defect of narrow polymer molecular weight distribution in the practical application of olefin polymerization; Among the components, 2-n-pentyl-2-(2-ethylhexyl)-1,3-dimethoxypropane, 2-isopentyl-2-benzyl-1,3-dimethoxy 1,3-diether compounds such as propane are used as electron donors. Although the molecular weight distribution of the polymer can be broadened by using this type of catalyst in the practical application of olefin polymerization, but in the polymerization process, when the concentration of hydrogen during polymerization is increased , will lead to a sharp drop in the isotacticity of the polymer, not only cannot make good use of the concentration of hydrogen to adjust the molecular weight of the final polymer, but 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 reaction and preparation method of catalyst thereof
  • Catalyst component for alkene polymerization reaction and preparation method of catalyst thereof
  • Catalyst component for alkene polymerization reaction and preparation method of catalyst thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] (1) Preparation of catalyst solid components

[0046] 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 which 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, wash...

Embodiment 2

[0051] Same as Example 1, the difference is that the temperature is raised to 40°C, and the "compound 2-n-pentyl-2-(2-ethylhexyl)-1,3-dimethoxypropane 3mmol, 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. Example 3

Embodiment 3

[0052] Same as Example 1, the difference is that the temperature is raised to 40°C, and the "compound 2-n-pentyl-2-(2-ethylhexyl)-1,3-dimethoxypropane 3mmol, 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 reaction and a catalyst thereof. The catalyst component is prepared by the following steps: (1) 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 moulding so as to form magnesium halide alcohol adduct microspheres, washing and drying the magnesium halide alcohol adduct microspheres to form spherical carriers; (2) treating the spherical carriers by a titanium compound, raising the temperature gradually, adding electron donor compounds a and b during the treatment process to carry out a treatment to make the titanium compound be loaded on the solid substance, washing the spherical carriers with an inert solvent after the treatment, and drying so as to obtain the spherical catalyst. When the catalyst is applied to propylene polymerization reactions, a satisfactory polymerization yield can be obtained; furthermore the polymer isotacticity is high, the molecular weight distribution is wide, and the hydrogen response is good; even if the reactions carry out under a high hydrogen gas concentration, the isotacticity of the obtained polymer can still be maintained in a high level, and thus the industrial production requirements are met.

Description

technical field [0001] The present invention relates to an olefin polymerization catalyst component and a method for preparing the catalyst, more specifically to an olefin polymerization catalyst component composed of two electron donor compounds 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 for CH 2 = CHR olefin polymerization, 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 the catalyst component, and along with the internal electron donor compound The development of polyolefin catalysts has led to continuous replacement. 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, pe...

Claims

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Application Information

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IPC IPC(8): C08F10/00C08F4/649C08F4/646C08F4/645
Inventor 马吉星高明智蔡晓霞刘海涛陈建华张晓帆李季禹王军李昌秀李现忠马晶胡建军
Owner CHINA PETROLEUM & CHEM CORP