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Catalyst component for olefin polymerization, catalyst system and application

A technology of olefin polymerization and catalyst, applied in the field of olefin polymerization, can solve the problems of low polymerization activity, low polymerization activity and stereoregularity, and insufficient polymerization activity

Active Publication Date: 2022-01-14
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Patent CN200710055884.0 reports that when phosphate ester compounds are used in the polymerization of propylene, polymers with a wider molecular weight distribution can be obtained, but the polymerization activity and stereoregularity are relatively low
[0006] Patent CN201210077908.3 reports that the combination of phosphate ester compound and phthalate compound is used for α-olefin copolymerization, but the polymerization activity is relatively low
[0007] Patent CN201811074779.6 reports that when phosphine oxide compound and phthalate compound are compounded for propylene polymerization, a polymer with a relatively wide molecular weight distribution can be obtained, but the polymerization activity is still not high enough

Method used

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  • Catalyst component for olefin polymerization, catalyst system and application
  • Catalyst component for olefin polymerization, catalyst system and application
  • Catalyst component for olefin polymerization, catalyst system and application

Examples

Experimental program
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Effect test

Embodiment approach

[0090] According to a preferred embodiment of the present invention, the external electron donor compound includes a compound represented by general formula (III):

[0091] R 2 k Si(OR 3 ) 4-k (III)

[0092] In general formula (III), 0≤k≤3; R 2 is an alkyl group, a cycloalkyl group, an aryl group, a haloalkyl group, an amino group, a halogen or a hydrogen atom; R 3 is alkyl, cycloalkyl, aryl, haloalkyl or amino.

[0093] According to a preferred embodiment of the present invention, R 2 for C 1 -C 10 Alkyl, C 3 -C 10 Cycloalkyl, C 6 -C 20 Aryl, C 1 -C 10 Haloalkyl, amino, halogen or hydrogen atom.

[0094] According to a preferred embodiment of the present invention, R 3 for C 1 -C 10 Alkyl, C 3 -C 10 Cycloalkyl, C 6 -C 20 Aryl, C 1 -C 10 Haloalkyl or amino groups.

[0095] In the catalyst system of the present invention, the alkylaluminum compound has the general formula AlR 4 n x 3-n compounds, where R 4 is hydrogen or a hydrocarbon group with 1-...

Embodiment 1

[0115] Preparation of the solid catalyst component: in a 250ml reactor equipped with a reflux condenser, a mechanical stirrer and a thermometer and fully replaced by nitrogen, add 36.5ml of dehydrated alcohol, 21.3g of anhydrous magnesium chloride, heat up under stirring, and the magnesium chloride is completely After dissolving, add 75ml of white oil and 75ml of silicone oil, and keep at 120°C 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 that 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, wa...

Embodiment 2

[0119] The method is the same as in Example 1, except that the internal electron donor compound is a compound internal electron donor of 4mmol isovaleryloxyphosphate di(4-isopropylphenyl ester) and 1mmol diisobutyl phthalate compound. The activity of the catalyst is 50.1kgPP / (g.cat), the isotactic index is 98.0%, the melt index is 7.9g / 10min, and the molecular weight distribution is 7.7.

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Abstract

The invention discloses a catalyst component for olefin polymerization. The catalyst component comprises magnesium, titanium, halogen and internal electron donor compounds, wherein the internal electron donor compounds comprise a first internal electron donor compound as shown in a general formula (I) and other second internal electron donor compounds containing lone pair electrons, such as a phthalate compound as shown in a general formula (II). The invention also discloses a catalyst system for olefin polymerization. The solid catalyst component provided by the invention has high activity and better hydrogen regulation sensitivity when being used for propylene polymerization; the obtained polypropylene resin has good stereoregularity; the molecular weight distribution of the polymer is moderate; and the comprehensive performance of the catalyst is excellent.

Description

technical field [0001] The invention belongs to the field of olefin polymerization, and in particular relates to a catalyst component for olefin polymerization, a catalyst system containing the solid catalyst component, a preparation method and application thereof. Background technique [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, polymers with higher yield and higher stereoregularity can be obtained, wherein the electron donor compound is in the catalyst component One of the essential ingredients, and with the development of internal electron donor compounds, polyolefin catalysts are constantly updated. At present, a large number of internal electron donor compounds have been disclosed, such as polycarboxylic acid, monocarboxylic acid ester or polycarboxylic acid ester, aci...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F10/00C08F110/06C08F4/649C08F4/646
CPCC08F10/00C08F110/06C08F4/6497C08F4/6465C08F4/6494C08F2500/15Y02P20/52
Inventor 李昌秀许景琦何世雄刘文蕊蔡晓霞马吉星马晶胡建军
Owner CHINA PETROLEUM & CHEM CORP
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