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Catalyst components and catalyst systems for olefin polymerization and their use and olefin polymerization process

A technology of olefin polymerization and catalyst, which is applied in the field of olefin polymerization, can solve the problems of catalysts that need to be further improved, low polymerization activity, poor sensitivity to hydrogen adjustment, etc., and achieve the effect of good particle shape, good shape, and improved production capacity

Active Publication Date: 2018-07-20
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] CN1169840C and CN1286863C disclose a kind of " magnesium chloride-alcohol-phthalate " spherical magnesium chloride adduct, but, the catalyst that forms with this adduct and titanium tetrachloride reaction is low in the polymerization activity when being used for propylene polymerization And the sensitivity of hydrogen adjustment is poor
[0008] CN102796127A discloses a kind of formula is MgXY-mEtOH-n (LB 1 )-k(LB 2 )-p(LB 3 ), wherein X is chlorine or bromine, and Y is chlorine, bromine, C 1 -C 14 Straight chain or branched chain alkyl, C 6 -C 14 Substituted or unsubstituted aryl, C 1 -C 14 straight-chain or branched-chain alkoxy and C 6 -C 14 One of the substituted or unsubstituted aryloxy groups, LB 1 , LB 2 and LB 3 Each is one of carboxylic acid, aldehyde, ether, ester, ketone, silane, amine, nitrile, phenol and alcohol other than ethanol, m is 1-5, n is 0.005-2, k is 0.0005-0.3, p is 0.0005-0.3, the catalyst further prepared by reacting the adduct with titanium halide and an optional internal electron donor can obtain a better balance between hydrogen tuning ability and stereospecific ability, but the polymerization activity of the catalyst still needs to be further improved

Method used

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  • Catalyst components and catalyst systems for olefin polymerization and their use and olefin polymerization process
  • Catalyst components and catalyst systems for olefin polymerization and their use and olefin polymerization process
  • Catalyst components and catalyst systems for olefin polymerization and their use and olefin polymerization process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0179] (1) In a 500mL reactor, add 150mL white oil (commercially purchased from Guangzhou Mingen Petrochemical Co., Ltd., by weight, water content is lower than 50ppm), 30g magnesium chloride containing 0.44wt% moisture (commercially purchased from Fushun City Xinyi Titanium Factory), 50mL of absolute ethanol (commercially purchased from Beijing Chemical Plant, with a water content of less than 100ppm by weight) and 1mL of 2-methoxybenzoyl chloride (commercially purchased from TOKYO KASEI KOGYO CO. LTD), heated to 120°C with stirring. After 2 hours of constant temperature reaction, the mixture was pressed into 300 mL of methyl silicone oil (commercially purchased from Dow Corning, with a viscosity of 300 centipoise / 20° C., and a water content of less than 50 ppm by weight) preheated to 120 ° C. Stir for 30 minutes at a speed of 1 / min for emulsification. Then, the emulsified product was injected into 2L of hexane (by weight, water content less than 5ppm) pre-cooled to -30° C. ...

Embodiment 2

[0197] (1) Prepare spherical magnesium halide adducts in the same manner as in step (1) of Example 1. The difference is that the magnesium chloride used is magnesium chloride containing 0.65 wt% moisture, and the composition of the prepared magnesium halide adducts is shown in the table 1 listed.

[0198] The magnesium halide adduct was subjected to DSC analysis. In the obtained DSC graph, a melting peak appeared at 97.6° C. and 112.1° C. respectively, and the melting enthalpy value associated with the highest melting peak was 177.3 J / g.

[0199] The X-ray diffraction spectrum of this magnesium halide adduct shows, in the scope of the 2θ diffraction angle of 5-15 °, show to exist in 6.06 ° (14), 8.82 ° (100), 8.98 ° (50), 9.74 ° ( 66), 5 diffraction lines under the diffraction angle 2θ of 11.48°(11); the values ​​in brackets represent the intensity I / I relative to the strongest diffraction line 0 .

[0200] (2) The spherical catalyst component was prepared in the same manner...

Embodiment 3

[0209] (1) In a 500mL reaction kettle, add 150mL of white oil (commercially purchased from Guangzhou Mingen Petrochemical Co., Ltd., with a water content of less than 50ppm by weight), 30g of anhydrous magnesium chloride (commercially purchased from Fushun City Xinyi titanium factory), 50mL absolute ethanol (commercially purchased from Beijing Chemical Plant, the water content is less than 100ppm by weight), 1mL 2-methoxybenzoyl chloride (commercially purchased from TOKYOKASEI KOGYO CO.LTD) and 0.15g water, heated to 120°C with stirring. After 2 hours of constant temperature reaction, the mixture was pressed into 300 mL of methyl silicone oil (commercially purchased from Dow Corning, with a viscosity of 300 centipoise / 20° C., and a water content of less than 50 ppm by weight) preheated to 120 ° C. Stir for 30 minutes at a speed of 1 / min for emulsification. Then, the emulsified product was injected into 2L of hexane (by weight, water content less than 5ppm) pre-cooled to -30° ...

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Abstract

The invention discloses a catalyst component for olefin polymerization, and catalyst system including the catalyst component. The catalyst component includes a reaction product prepared from a magnesium halide adduct MgX<1>Y-mR<1>OH-n(LB1)-k(LB2)-p(LB3), a titanium compound and an optional internal electron donor, wherein LB1 is an alkoxy benzoate series compound represented by formula II, LB2 is a hydroxyl benzoate series compound represented by formula III, and LB3 is R<6>OH. The catalyst system formed by the catalyst component has high catalysis activity in olefin polymerization and especially propylene polymerization, and can effectively improve the productivity of a lifting device; and the catalyst system also has high stereospecificity, and alpha-olefin polymers prepared in the invention have high isotacticity. The particle form of the magnesium halide adduct used in the catalyst component is good, so the obtained polymers also have a good form.

Description

technical field [0001] The present invention relates to a catalyst component for olefin polymerization and its application. The present invention also relates to a catalyst system for olefin polymerization and its application. The present invention further relates to an olefin polymerization method. Background technique [0002] It is known in the prior art to support titanium compounds and electron donor compounds on active magnesium halides to prepare Ziegler-Natta catalysts. Among them, the active magnesium halide often uses the adduct of magnesium halide and alcohol, which is used as a carrier to react with titanium halide and electron donor compound to obtain a spherical catalyst. The spherical catalyst is used in olefins (especially propylene) During polymerization, it has higher polymerization activity and stereospecific ability, and the obtained polymer also has better particle shape and higher apparent density. [0003] Most of the disclosed magnesium halide·alcoho...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F10/00C08F4/654C08F4/651C08F4/646C08F10/06
Inventor 张纪贵夏先知刘月祥李威莅高富堂高平凌永泰赵瑾彭人琪谭扬林洁张志会段瑞林
Owner CHINA PETROLEUM & CHEM CORP