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Broad-molecular-weight-distribution polypropylene catalyst component and preparation method thereof, and catalyst thereof

A technology for polypropylene catalysts and catalytic components, which is applied in the field of catalysts and can solve the problems of complex preparation, unfavorable industrial application and promotion, etc.

Active Publication Date: 2019-01-22
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the preparation of cyanosuccinate compounds in the prior art is complicated, and dangerous metal potassium, potassium ethylate and other substances are used, which is not conducive to industrial application and promotion.

Method used

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  • Broad-molecular-weight-distribution polypropylene catalyst component and preparation method thereof, and catalyst thereof
  • Broad-molecular-weight-distribution polypropylene catalyst component and preparation method thereof, and catalyst thereof
  • Broad-molecular-weight-distribution polypropylene catalyst component and preparation method thereof, and catalyst thereof

Examples

Experimental program
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Embodiment 1-8

[0044] Introduce 230ml TiCl into a 500ml three-necked round-bottomed flask purged with nitrogen at -15°C 4 Get spherical magnesium chloride carrier 6.8g to add wherein while stirring, flask is heated to 60 ℃, then add the corresponding ester compound (prepared by the aforementioned method) in 5.5mol table 1, temperature is raised to 120 ℃, reaction 2 hours, then the stirring was stopped and the liquid was filtered off. Add 230ml fresh TiCl again 4 , continue to react at 120°C for 2 hours, filter out the liquid, wash the obtained solid with anhydrous hexane at 60°C until no titanium can be detected in the cleaning solution, and then vacuum-dry to obtain the catalytic component, which is ready for use.

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Abstract

The invention discloses a broad-molecular-weight-distribution polypropylene catalyst component. The catalyst component comprises, by weight, 10 to 25% of magnesium, 1 to 10% of titanium, 40 to 60% ofhalogen and 1 to 30% of an internal electron donor. The internal electron donor comprises at least one of the compounds as shown in a general formula (I) which is described in the specification. In the general formula (I), R1 and R2 are selected from C1-C20 linear or branched alkyl groups, more preferably, C1-C5 linear or branched alkyl groups. The catalyst component is applied to a catalyst for propylene polymerization and allows more desirable molecular weight distribution to be obtained. The invention further discloses a preparation method for the catalyst component and a catalyst containing the catalyst component.

Description

technical field [0001] The invention relates to a propylene polymerization catalyst component, a preparation method of the component and a catalyst containing the component, in particular to a polypropylene catalyst component and a catalyst for preparing a wider molecular weight distribution. Background technique [0002] At present, the high-efficiency Ziegler-Natta catalyst is still the main catalyst for polypropylene used in industrial production. During catalyst preparation and polymerization, it is necessary to add electron-rich Lewis base compounds, that is, electron donor compounds. The addition of electron donor compounds can improve the activity and stereoselectivity of the catalyst, control the relative molecular mass and distribution of the polymer, and optimize the performance of the catalyst, so as to achieve the purpose of improving the performance of the polymer. According to different ways of addition, electron donor compounds can be divided into internal el...

Claims

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Application Information

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IPC IPC(8): C08F110/06C08F4/651C08F4/649C08F4/646
CPCC08F110/06C08F4/651C08F4/6495C08F4/6465C08F2500/04C08F2500/15
Inventor 张文学朱博超徐人威黄安平高琳李忠宋赛楠王霞刘强邓守军张平生刘小燕刘永军巨娟霞
Owner PETROCHINA CO LTD