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Catalyst component, catalyst and method for olefin polymerization

An olefin polymerization and catalyst technology, applied in the field of olefin polymerization catalyst components, can solve the problems of narrow molecular weight distribution and high preparation cost of olefin polymers, and achieve the effects of high stereoselectivity, wide molecular weight distribution, and good hydrogen modulation sensitivity

Active Publication Date: 2012-05-16
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 component, catalyst and method for olefin polymerization
  • Catalyst component, catalyst and method for olefin polymerization
  • Catalyst component, catalyst and method for olefin polymerization

Examples

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preparation example Construction

[0071] In the preparation of the above-mentioned olefin polymerization catalyst component, the molar ratio of the amount of the internal electron donor a to the magnesium atom can generally be 0.01-1, preferably 0.05-0.5. The molar ratio of the amount of the internal electron donor b to the magnesium atom can generally be 0.01-1, preferably 0.05-0.5.

[0072] According to the olefin polymerization catalyst of the present invention, the catalyst is used for 2 = The polymerization of olefins represented by CHR, wherein R is hydrogen or an alkyl group with 1 to 6 carbon atoms, said catalysts include the reaction products of the following substances:

[0073] (1) the above-mentioned olefin polymerization catalyst component;

[0074] (2) organoaluminum compounds as cocatalysts;

[0075] (3) Optionally, an external electron donor compound.

[0076] In the above olefin polymerization catalyst, the organoaluminum compound may be various organoaluminum compounds commonly used in the...

preparation example 1

[0094] Preparation of Triethylene Glycol Dibenzoate

[0095] Take 0.2mol (30g) of triethylene glycol and dissolve it in a mixture of 100mL of dry tetrahydrofuran and 100mL of pyridine, and stir evenly; while stirring, add 0.5mol (70g) of benzoyl chloride; continue stirring for 1 hour, then raise the temperature of the system to reflux, and reflux React for 6 hours; add 50 mL of water and stir to reflux for 2 hours. Add 200 mL of anhydrous diethyl ether, separate the layers, wash the organic phase with 1N hydrochloric acid until pH = 4, then wash with saturated saline solution until neutral, remove the solvent by distillation under normal pressure, and recrystallize from n-hexane to obtain 63 g of white solid. 1 H-NMR (TMS, CDCl 3 , ppm): δ8.38(d, 4H), 7.55(t, 2H), 7.42(t, 4H), 4.47(t, 4H), 3,84(t, 4H), 3,72(s, 4H ).

preparation example 2

[0097] Magnesium diethoxide preparation

[0098] In a 1L reactor equipped with a stirrer, a reflux condenser, a thermometer and a burette, after sufficient replacement with nitrogen, 550 mL of ethanol was added to the reactor, and 0.68 g of iodine was dissolved. After stirring, the temperature was raised until reaching the reflux temperature of the reaction system. Then add magnesium powder 32g successively. React until no more hydrogen is released. Then wash, separate and dry to obtain a bulk density of 0.25g / cm 3 , Diethoxymagnesium with an average particle size (D50) of 38.0 μm.

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Abstract

The invention provides a catalyst component, a catalyst and a method for olefin polymerization. An internal donor a and an internal donor b are used as internal donors, so that when the catalyst component and the catalyst are used for olefin polymerization, the catalyst component and the catalyst have high stereo selectivity, high activity and high hydrogen response, and the prepared olefin polymer has wide molecular weight distribution, wherein the internal donor a is a compound shown as a formula (I); and in the formula (I), R1 and R3 are same or different, and refer to a straight-chain or branched-chain alkyl with the carbon atom number of 1-10, naphthenic base with the carbon atom number of 3-10 or substituted or non-substituted aryl with the carbon atom number of 6-20; R2 refers to straight-chain or branched-chain alkylene with the carbon atom number of 1-6 and substituted or non-substituted aryl with the carbon atom number of 6-20; and n is an integer from 2 to 10.

Description

technical field [0001] The invention relates to an olefin polymerization catalyst component, an olefin polymerization catalyst and an olefin polymerization method. Background technique [0002] Currently, solid catalyst components based on magnesium, titanium and electron donors, known in the art as Ziegler-Natta catalysts, are available 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 internal electron donating compounds are one of the essential components in Ziegler-Natta catalysts. 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, As for the recently disclosed 1,3-diethers, succinates and 1,3-diol esters, it is the continuous development of electron donor c...

Claims

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Application Information

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IPC IPC(8): C08F10/00C08F4/649C08F10/06
Inventor 周奇龙谭忠徐秀东严立安宋维玮李凤奎尹珊珊于金华
Owner CHINA PETROLEUM & CHEM CORP
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