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Catalyst component for olefin polymerization, preparation method of catalyst component, catalyst for olefin polymerization and polymerization method

A technology of olefin polymerization and catalyst, which is applied in the field of olefin polymerization, can solve the problems of fast decay of catalytic activity, narrow molecular weight distribution, poor hydrogenation sensitivity of catalyst, etc., and achieve the effect of wide molecular weight distribution, widening molecular weight distribution and high activity

Active Publication Date: 2021-03-19
PETROCHINA CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The above-mentioned internal electron donors have different characteristics: catalysts containing diester internal electron donors can obtain polymers with a wider molecular weight distribution, but the hydrogenation sensitivity of the catalysts is poor; catalysts containing diether internal electron donors The catalyst has good sensitivity to hydrogen adjustment, but the catalytic activity decays quickly and the molecular weight distribution is also narrow

Method used

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  • Catalyst component for olefin polymerization, preparation method of catalyst component, catalyst for olefin polymerization and polymerization method
  • Catalyst component for olefin polymerization, preparation method of catalyst component, catalyst for olefin polymerization and polymerization method
  • Catalyst component for olefin polymerization, preparation method of catalyst component, catalyst for olefin polymerization and polymerization method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Under a nitrogen atmosphere, add 74 mmol of furan to 20 mL of tetrahydrofuran solution, cool down to -78°C, slowly add 44 mmol of n-butyllithium, stir and slowly raise the temperature, and react for 4 hours after rising to room temperature; then cool the solution to -78°C, 34 mmol o-dibromobenzene was added dropwise, stirred and slowly raised to room temperature for 12 h. Pour the reaction product into ice water, extract the organic phase with ethyl acetate, then dry the organic phase with magnesium sulfate to remove water, filter, the resulting solution is concentrated under reduced pressure and separated by column chromatography, the developer is ethyl acetate / petroleum Ether (1:50), the oily product was obtained, and the waxy product 1,2-bis(2-furan)benzene (abbreviated as internal electron donor a) was obtained after removing the solvent, with a yield of 47%. 1 H-NMR (CDCl3): δ=7.86 (4H, m, C=CH), 7.47 (2H, m, C=CH), 7.07 (2H, d, C=CH), 6.68 (2H, m, C=CH) CH).

[...

Embodiment 2

[0044] Under nitrogen atmosphere, add 70mmol of furan into 20mL of tetrahydrofuran solution, cool down to -78°C, slowly add 40mmol of n-butyllithium, stir and slowly raise the temperature, rise to room temperature and react for 4h; then cool the solution to -78°C, 20 mL of 30 mmol of 2,3-dibromonaphthalene in tetrahydrofuran was added dropwise, stirred and slowly raised to room temperature for 12 h. Pour the reaction product into ice water, extract the organic phase with ethyl acetate, dry the organic phase with magnesium sulfate to remove water, filter, and concentrate the obtained solution under reduced pressure, then recrystallize in ethanol to obtain the solid product 2,3- Bis(2-furan)naphthalene (abbreviated as internal electron donor b), the yield is 55%. 1 H-NMR (CDCl3): δ = 8.40 (2H, s, C = CH), 8.00 (2H, d, C = CH), 7.86 (2H, d, C = CH), 7.59 (2H, m, C = CH), 7.07 (2H,d,C=CH), 6.68 (2H,m,C=CH).

[0045]

Embodiment 3

[0047] Under a nitrogen atmosphere, add 77 mmol of 2-methyl-furan into 20 mL of tetrahydrofuran solution, cool down to -78°C, slowly add 45 mmol of n-butyllithium, stir and slowly raise the temperature, and react for 4 hours after rising to room temperature; Cool down to -78°C, add 35 mmol of 1,2-(dibromomethyl)benzene in 20 mL of tetrahydrofuran solution dropwise, stir and slowly rise to room temperature to react for 12 h. Pour the reaction product into ice water, extract the organic phase with ethyl acetate, dry the organic phase with magnesium sulfate to remove water, filter, and concentrate the obtained solution under reduced pressure, then recrystallize in ethanol to obtain the solid product 1,2- Bis(5-methyl-2-methylene-furan)benzene (abbreviated as internal electron donor c), yield 51%. 1 H-NMR (CDCl3): δ=7.14 (2H, m, C=CH), 6.98 (2H, m, C=CH), 5.96 (4H, d, C=CH), 3.66 (4H, s, CH 2 ),2.30(6H,s,CH 3 ).

[0048]

[0049] (2) Preparation of catalyst

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Abstract

The invention relates to a catalyst component for olefin polymerization and a preparation method of the catalyst component. The catalyst component is composed of magnesium, titanium, chlorine, and atleast one internal electron donor compound selected from 1,2-bis(fur-2-ylene)benzene and substituents thereof, 2-(fur-2-ylene)phenyl furan and substituents thereof, and 1,2-bis(fur-2-ylene)benzene andsubstituents thereof. Specifically, the catalyst component comprises, by weight, 10-30% of magnesium, 0.2-8% of titanium, 37-70% of chlorine and 0.1-25% of the internal electron donor compound. The invention further provides a catalyst for olefin polymerization. The catalyst comprises the catalyst component. When the catalyst component or the catalyst provided by the invention is used for homopolymerization or copolymerization of olefin, the catalyst component or the catalyst has high activity, slow activity attenuation and good hydrogen regulation sensitivity, and an obtained polymer has wide molecular weight distribution; and when the catalyst component or the catalyst is used for catalyzing copolymerization of ethylene and alpha-olefin, a copolymerized product with a high alpha-olefincontent can be obtained, and the content of higher alpha-olefin is adjustable.

Description

technical field [0001] The invention relates to the field of olefin polymerization, in particular to a catalyst component for olefin polymerization and a preparation method thereof. The present invention also relates to an olefin polymerization catalyst and an olefin polymerization method comprising the above-mentioned catalyst component. Background technique [0002] Ziegler-Natta catalysts are the most widely used olefin polymerization catalysts. For Ziegler-Natta catalysts, the most widely used titanium catalyst system currently uses magnesium, titanium, halogen and electron donors as basic components, and the electron donor compound is an essential component of the catalyst. A variety of internal electron donor compounds have been disclosed, such as monocarboxylic acid esters or polycarboxylic acid esters, acid anhydrides, ketones, monoethers or polyethers, alcohols, amines, etc. and their derivatives. Among them, aromatic dicarboxylic acid esters are more common, such...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F4/649C08F4/646C08F4/651C08F210/02C08F210/08C08F210/14
CPCC08F210/02C08F210/08C08F210/14C08F4/6494C08F4/646C08F4/6465C08F4/651C08F2500/04Y02P20/52
Inventor 刘小燕王玲玲陈旭邓守军宋赛楠樊洁徐人威张翠玲李艳芹刘强王霞
Owner PETROCHINA CO LTD
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