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Catalyst system for olefin polymerization and its application

A technology of olefin polymerization and catalyst, which is applied in the field of olefin polymerization catalysts, can solve problems that have not been applied in the field of olefin polymerization, and achieve the effect of improving the polymerization activity of catalysts

Active Publication Date: 2021-08-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Cyclotriveratrol and its derivatives have a unique C3 symmetric structure and rigid electron-rich cavities, which are mainly used in molecular recognition and supramolecular assembly, but have not been used in the field of olefin polymerization

Method used

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  • Catalyst system for olefin polymerization and its application
  • Catalyst system for olefin polymerization and its application
  • Catalyst system for olefin polymerization and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0074] According to a preferred embodiment of the present invention, the diether compound is selected from 2-(2-ethylhexyl) 1,3-dimethoxypropane, 2-isopropyl-1,3-dimethoxypropane, 2-butyl-1,3-dimethoxypropane, 2-sec-butyl-1,3-dimethoxypropane, 2-cyclohexyl-1,3-dimethoxypropane, 2-phenyl -1,3-dimethoxypropane, 2-(2-phenylethyl)-1,3-dimethoxypropane, 2-(2-cyclohexylethyl)-1,3-dimethoxy 2-(p-chlorophenyl)-1,3-dimethoxypropane, 2-(diphenylmethyl)-1,3-dimethoxypropane, 2-(1-naphthyl )-1,3-dimethoxypropane, 2-(2-fluorophenyl)-1,3-dimethoxypropane, 2,2-dicyclohexyl-1,3-dimethoxypropane, 2,2-dicyclopentyl-1,3-dimethoxypropane, 2,2-diethyl-1,3-dimethoxypropane, 2,2-dipropyl-1,3-di Methoxypropane, 2,2-diisopropyl-1,3-dimethoxypropane, 2,2-dibutyl-1,3-dimethoxypropane, 2-methyl-2-propane Base-1,3-dimethoxypropane, 2-methyl-2-benzyl-1,3-dimethoxypropane, 2-methyl-2-ethyl-1,3-dimethoxy Propane, 2-methyl-2-isopropyl-1,3-dimethoxypropane, 2-methyl-2-phenyl-1,3-dimethoxypropane, 2-methyl-...

preparation example 1

[0126] This preparation example is used to illustrate the preparation of magnesium compounds.

[0127] Mix anhydrous magnesium chloride and ethanol according to the molar ratio of 1:2.6, heat up to 120°C to react to form a magnesium chloride alcoholate melt, stir at a high speed in the dispersion medium white oil and silicone oil, and then put it into cooled hexane to form The spherical magnesium chloride alcoholate particles are washed and dried to obtain a spherical carrier.

preparation example 2

[0129] This preparation example is used to illustrate the preparation of solid catalyst components.

[0130] In a 300ml stirred glass reaction bottle fully replaced by high-purity nitrogen, add 100ml of titanium tetrachloride, cool to -20°C, add 8g of spherical magnesium chloride alcoholate prepared in Preparation Example 1, slowly heat up to 110°C, During the heating process, add the internal electron donor shown in Table 1 or Table 2, and keep the temperature at 110°C for 0.5h, filter off the liquid, add titanium tetrachloride to treat it twice, then wash it with hexane five times, and dry it in vacuum Finally, a titanium-containing solid catalyst component is obtained.

[0131] Examples and comparative examples

[0132] This example is used to illustrate the catalyst system provided by the present invention and its application.

[0133] Polymerization A:

[0134] In a parallel pressure reactor (PPR, reaction volume 20ml) of 48 passages, adopt nitrogen high-temperature pu...

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Abstract

The present invention relates to a catalyst system for olefin polymerization and its use. The catalyst system comprises 1) a solid catalyst component containing magnesium, titanium, halogen and an internal electron donor; 2) an alkylaluminum compound; and 3) an external electron donor; wherein the external electron donor comprises such as For the compound represented by formula A, the internal electron donor includes a diether compound and / or an alcohol ester compound. The catalyst system of the invention can not only improve the propylene polymerization activity and hydrogen modulation sensitivity of the catalyst, but also maintain high stereospecificity. In the polymerization of ethylene-propylene and propylene-α-olefins, it can increase the polymerization activity while keeping the comonomer content unchanged.

Description

technical field [0001] The invention belongs to the field of olefin polymerization catalysts, in particular to a catalyst system for olefin polymerization and its application. Background technique [0002] As we all know, in order to meet the needs of industrial production and produce products with excellent performance, the activity, stereospecificity, hydrogen modulation sensitivity and copolymerization performance of polyolefin catalysts are all important technical parameters. Catalysts with excellent comprehensive performance have always been the goal pursued by polyolefin resin manufacturers and R&D institutions. [0003] The Ziegler-Natta catalyst mainly includes magnesium / titanium / internal electron donor, and the catalyst is often used together with alkylaluminum and external electron donor to form a complete catalyst system. External electron donors have the remarkable characteristics of rich types, flexible and controllable addition, and great influence on the perf...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F10/00C08F110/06C08F210/06C08F4/654C08F4/651C08F4/649C08F4/645C08F210/02
CPCC08F10/00C08F110/06C08F210/06C08F4/6545C08F4/651C08F4/6494C08F4/645C08F2500/15C08F2500/12C08F210/02
Inventor 林洁黄庭赵惠郭子芳周俊领夏先知张晓帆孙竹芳赵瑾张军辉付梅艳严立安岑为
Owner CHINA PETROLEUM & CHEM CORP
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