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Solid catalyst component and catalyst system for producing polymers

A solid catalyst and compound technology, applied in the field of olefin polymerization, can solve the problems of high polymerization activity, low polymerization activity and stereoregularity, and insufficient hydrogen modulation sensitivity.

Pending 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 CN201610565348.4 reports that when a phosphate compound and a diether compound are compounded for propylene polymerization, the hydrogenation sensitivity of the catalyst is relatively good, but the stereoregularity is relatively low and the molecular weight distribution is relatively narrow
[0007] Patent CN201811074788.5 reports that when phosphine oxide compound and diether compound are combined for propylene polymerization, the polymerization activity is high, but the hydrogen adjustment sensitivity is not good enough

Method used

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  • Solid catalyst component and catalyst system for producing polymers
  • Solid catalyst component and catalyst system for producing polymers
  • Solid catalyst component and catalyst system for producing polymers

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Experimental program
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Effect test

Embodiment approach

[0085] According to a preferred embodiment of the present invention, the external electron donor compound includes a compound represented by general formula (III):

[0086] R 2 k Si(OR 3 ) 4-k (III)

[0087] 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.

[0088] According to some embodiments 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.

[0089] According to some embodiments 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.

[0090] 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 1-20 carbon at...

Embodiment 1

[0110] Preparation of the solid catalyst component: In a reactor fully replaced by high-purity nitrogen, add 4.8g of magnesium chloride, 95mL of toluene, 4mL of epichlorohydrin, and 12.5mL of tributyl phosphate in sequence, and raise the temperature to 50°C while stirring, and maintain After 2.5h, the solid was completely dissolved, and 1.4g of phthalic anhydride was added and maintained for 1h. Cool the solution to below -25°C, add 56mL of TiCl dropwise within 1h 4 , slowly warming up to 80°C, solids gradually precipitated during the heating process, adding 4.2mmol cinnamoyloxy diphenyl phosphate and 0.8mmol 9,9-bis(methoxymethyl)fluorene compound internal electron donor The compound was maintained at the temperature for 1 h, and after filtration, it was washed twice with 70 mL of toluene to obtain a solid precipitate. Then add 60mL toluene, 40mL TiCl 4 , the temperature was raised to 110°C, maintained for 2h, the same operation was repeated once, and then washed three time...

Embodiment 2

[0113] The method is the same as in Example 1, except that the internal electron donor compound is a mixture of 0.5mmol acetoxy diphenyl phosphate and 4.5mmol 2-isopropyl-2-isoamyl-1,3-dimethoxypropane Compound internal electron donor compounds. The activity of the catalyst is 67.3kgPP / (g.cat), the isotactic index is 98.5%, the melt index is 13.0g / 10min, and the molecular weight distribution is 7.4.

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Abstract

The invention discloses a solid catalyst component for producing polymers. The solid catalyst component comprises magnesium, titanium, halogen and internal electron donor compounds, and the internal electron compounds comprise a first internal electron donor compound as shown in a general formula (I) and a second internal electron donor compound as shown in a general formula (II). The invention also provides a catalyst system comprising the solid catalyst component. When the catalyst component provided by the invention is used for propylene polymerization reaction, polymerization activity is high, stereospecificity is good, hydrogen regulation sensitivity is good, and the molecular weight distribution of the obtained polymers is moderate.

Description

technical field [0001] The invention belongs to the field of olefin polymerization, and specifically relates to a solid catalyst component for producing polymers, 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 Polymerization of olefins, especially in the polymerization of α-olefins with 3 carbon atoms or more, can give polymers with higher yield and higher stereoregularity. Among them, the electron donor compound is one of the essential components in the catalyst components, and with the development of the internal electron donor compound, the polyolefin catalyst is constantly updated. At present, the internal electron donors used in industry are mainly phthalates. This catalyst system has high activity and high stereoregularity. and aroused widesp...

Claims

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Application Information

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IPC IPC(8): C08F10/00C08F110/06C08F4/649C08F4/646
CPCC08F10/00C08F110/06C08F4/6497C08F4/6494C08F4/6465C08F2500/04C08F2500/12C08F2500/15Y02P20/52
Inventor 李昌秀许景琦何世雄马晶马吉星蔡晓霞胡建军刘文蕊
Owner CHINA PETROLEUM & CHEM CORP
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