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Catalyst components, catalyst systems and applications thereof for olefin polymerization

An olefin polymerization and catalyst technology, which is applied in the field of catalyst components for olefin polymerization, can solve the problems of narrow molecular weight distribution and high preparation cost of olefin polymers

Active Publication Date: 2020-06-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation cost of this type of compound is high, and the molecular weight distribution of the prepared olefin polymer is narrow

Method used

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  • Catalyst components, catalyst systems and applications thereof for olefin polymerization
  • Catalyst components, catalyst systems and applications thereof for olefin polymerization
  • Catalyst components, catalyst systems and applications thereof for olefin polymerization

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0108] Take 10 g of the above-mentioned dialkoxymagnesium carrier, 50 mL of toluene, and 0.8 g of compound 1 to prepare a suspension. In a 300mL reaction kettle that has been repeatedly replaced with high-purity nitrogen, add 40mL of toluene and 60mL of titanium tetrachloride, raise the temperature to 65°C, then slowly add the prepared suspension into the kettle, keep the temperature at 65°C for 1 hour, and slowly raise the temperature to 110°C, when the temperature rises to 80°C, add 2.2g of compound 1, keep the temperature at 110°C for 1 hour, press filter to obtain a solid. The obtained solid was washed twice with 150 mL of toluene, and the liquid was removed by pressure filtration. A mixed solution of 90 mL of toluene and 60 mL of titanium tetrachloride was added and stirred at 110° C. for 1 hour, and treated twice in this way. Press filtration, wash the obtained solid once with toluene and 4 times with 150 mL of hexane, press filter and dry to obtain the catalyst solid c...

Embodiment 2-6

[0110] Using 3.0 g of compounds 2-6 as internal electron donors, the same preparation method as in Example 1 was used to prepare the catalyst solid component.

[0111] Method B:

[0112] (1) Configuration of alcoholate solution

[0113] In the reaction kettle that has been repeatedly replaced by high-purity nitrogen, 15.0g of anhydrous magnesium chloride, 60mL of toluene, and 63.5mL of isooctyl alcohol were sequentially added, and the reaction was carried out for 2.0 hours at a stirring speed of 300rpm and a temperature of 110°C to obtain a stable and uniform Alcohol solution. Add 0.8 mL of 3,5-heptanediol dibenzoate and 3.0 mL of diisobutyl phthalate, and react for 1.5 hours under the condition of stirring speed of 300 rpm and temperature of 110°C. Then 2.25 mL of tetrabutyl titanate was added, and the mixture was reacted for 1.5 hours at a stirring speed of 300 rpm and a temperature of 110° C. Then 90 mL of toluene was added, and the mixture was reacted for 0.5 hour at a ...

Embodiment 7

[0116] Add the above alcoholate solution into a reactor fully replaced by nitrogen and filled with 60mL of titanium tetrachloride and 40mL of toluene, and make them fully contact at -25°C for 1.5 hours by stirring, then raise the temperature to 110°C over 3 hours After constant temperature for 1 hour, add 108mL toluene and 12mL titanium tetrachloride, stir for 1 hour, cool and press filter, then add 12mL titanium tetrachloride and 108mL toluene, heat up to 100°C, add 1.5g compound 1, and keep constant temperature for 1 hour. Heat up to 110°C, add 72mL of toluene and 48mL of titanium tetrachloride and stir for 1 hour, press filter and wash the obtained solid once with 120mL of toluene and 4 times with 150mL of hexane. Press filter, transfer and dry to obtain the olefin polymerization catalyst component.

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PUM

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Abstract

The invention relates to a catalyst component and a catalyst system for olefin polymerization and an application thereof. The catalyst component provided by the invention consists of titanium, magnesium, halogen, and internal electron donor, wherein the internal electron donor comprises 2,2'-dialkyl-1,3-dicarbonate ester compound shown as formula (I). The catalyst component and the catalyst system comprising same provided by the invention are applicable to the development of polyolefin, particularly polypropylene, resin. (img file='DDA0000982154460000011.TIF' wi='348' he='407' / ).

Description

technical field [0001] The invention belongs to the field of catalysts, and in particular relates to a catalyst component for olefin polymerization, a catalyst system and applications thereof. Background technique [0002] A solid titanium catalyst component based on magnesium, titanium, halogen and an electron donor, known in the art as a Ziegler-Natta catalyst, 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. It is well known that electron donor compounds are one of the essential components in Ziegler-Natta catalyst components. From the early disclosed monobasic carboxylic acid ester compounds, such as ethyl benzoate, to the widely used dibasic aromatic carboxylic acid ester compounds, such as di-n-butyl phthalate or diisobutyl phthalate, Then to the recently disclosed 1,3-diethers (CN1020448C), succinates (CN1313869) and 1,3-dio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F110/06C08F4/649
CPCC08F110/06C08F2410/01C08F4/6494C08F2500/04C08F2500/07
Inventor 张锐谭忠周奇龙徐秀东于金华尹珊珊李凤奎宋维玮
Owner CHINA PETROLEUM & CHEM CORP
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