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Olefin polymerization catalyst component, olefin polymerization catalyst and olefin polymerization method

A technology of olefin polymerization and catalyst, which is 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 high activity

Active Publication Date: 2014-04-02
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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  • Olefin polymerization catalyst component, olefin polymerization catalyst and olefin polymerization method
  • Olefin polymerization catalyst component, olefin polymerization catalyst and olefin polymerization method
  • Olefin polymerization catalyst component, olefin polymerization catalyst and olefin polymerization method

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] Magnesium diethoxide preparation

[0095] 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 emitted. 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.

Embodiment 1

[0097] This example is used to illustrate the olefin polymerization catalyst component, olefin polymerization catalyst and olefin polymerization method of the present invention.

[0098] The preparation of olefin polymerization catalyst component: get the diethoxymagnesium carrier 88mmol that preparation example 1 makes and toluene 470mmol, diglyme (electron donor a, R in formula (I) 1 and R 3 is methyl, R 2 is ethyl, n is 2) 4mmol, di-n-butyl phthalate (electron donor b) 6mmol, and is prepared into a suspension; in a 300mL reaction kettle repeatedly replaced by high-purity nitrogen, add 94mmol of toluene and four Titanium chloride 819mmol, heat up to 80°C, then add the prepared suspension into the kettle, keep the temperature constant for 1 hour, then continue to heat up to 115°C, keep the temperature constant for 2 hours, then filter the liquid clean. Then add a mixed solution of 1128 mmol of toluene and 273 mmol of titanium tetrachloride and raise the temperature to 110° ...

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Abstract

The invention provides an olefin polymerization catalyst component, an olefin polymerization catalyst and an olefin polymerization method. In the method, an internal donor a and an internal donor b are taken as internal donors simultaneously, so that the olefin polymerization catalyst component and the olefin polymerization catalyst have relatively high stereo selectivity, high activity and high hydrogen regulation sensitivity when applied to olefin polymerization; a prepared olefin polymer has wide molecular weight distribution; the internal donor a is a compound shown as a formula (I); and in the formula (I), R1 and R3 are the same or different, are one of linear or branched alkyl with 1-10 carbon atoms, naphthenic bases with 3-10 carbon atoms and substituted or unsubstituted aryl with 6-20 carbon atoms respectively, R2 is one of linear or branched alkyl with 1-6 carbon atoms and substituted or unsubstituted aryl with 6-20 carbon atoms, and n is an integer of 2-10.

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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Patent Type & Authority Patents(China)
IPC IPC(8): C08F10/00C08F4/646C08F4/649C08F110/06
Inventor 周奇龙谭忠宋维玮徐秀东严立安于金华李凤奎尹珊珊
Owner CHINA PETROLEUM & CHEM CORP