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Olefinic polymerization catalyst, preparation method and polymerization method

A technology of olefin polymerization and catalyst, which is applied in the field of internal electron donor diarylic acid-2, which can solve the problems of unadjustable catalyst performance, narrow polyolefin molecular weight distribution, and restrictions on the application of polyolefins.

Active Publication Date: 2009-10-21
YINGKOU XIANGYANG CATALYST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

1,3-diether (EP 1395617), especially aromatic 1,3-diether (CN 1268957A, CN 1141285 A) and other compounds as catalysts prepared as electron donors have the highest catalyst activity today, and can even save external Electronic body, but the molecular weight distribution of polyolefin is narrow, which limits the application of polyolefin
The appearance of complex internal electron donors (CN 1831017A, US-2008-0161513-A1) such as 1,4-aryl diether overcomes the shortcomings of the catalysts prepared by the above-mentioned electron donors, and is a good advantage of Ziegler-Natta catalysts. The electron donor, but it is two kinds of internal electron donors, it is inconvenient to use
Recently, diarylic acid-2,4-pentanediol ester (CN 1453298 A) is also reported as the catalyst of the electron donor, but it is only the same kind of benzoic acid, and the performance of the catalyst formed by it cannot be adjusted

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] a) Preparation of synthetic magnesium chloride alcoholate

[0033] After the three-neck flask equipped with a stirrer and a thermometer was fully replaced with nitrogen, anhydrous MgCl was added 2 5 grams, 30ml decane and 23.0ml 2-ethylhexanol. While stirring, the temperature was raised to 130°C, and the reaction was carried out at this temperature for 2h. Add 1.5ml tetrabutyl titanate and 2ml diisobutyl phthalate to 5ml toluene in advance, and stir at room temperature for 0.5h to obtain a complex solution. This toluene solution was added to a three-necked flask, and the reaction was continued at 130° C. for 1 h. After the reaction was completed, it was cooled to room temperature to form a stable alcoholate solution.

[0034] b) Preparation of A solid catalyst component

[0035] Within 30 minutes, the above-prepared alcoholate solution was added dropwise to a reactor equipped with a stirrer and a thermometer, fully replaced by nitrogen, filled with 200ml of titaniu...

Embodiment 2

[0042] Change the two (p-isopropylbenzoic acid)-2,4-pentanediol esters in the b) preparation of Example 1 to be two (2-naphthoic acid)-2,4-pentanediol esters, and the others are the same as in the examples 1. Catalyst activity 44.0KgPP / g.cat, polymer apparent density 0.44g / cm 3 .

Embodiment 3

[0044] Change the two (p-isopropylbenzoic acid)-2,4-pentanediol esters in the preparation of b) of Example 1 to be two (4-methyl-1-naphthoic acid)-2,4-pentanediol esters , other with embodiment 1. Catalyst activity 52.5.0KgPP / g.cat, polymer apparent density 0.44g / cm 3 .

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Abstract

The invention relates to an olefinic polymerization catalyst, a preparation method and a polymerization method. The olefinic polymerization catalyst comprises three components: A is solid catalyst component, B is organo-aluminum compound of catalyst accelerator, and C is organic silicon of external electron donor; wherein, the A component contains titanium, magnesium and chlorine elements as well as internal electron donor which is diaryl acid-2, 4- pentanediol ester comprising the same diaryl acid-2, 4- pentanediol ester or mixed diaryl acid-2, 4- pentanediol ester of any two different aromatic acids having the mol ratio of 1:1, wherein, the aromatic acids can be carbocycle aromatic acid or heterocycle aromatic acid; the A component has the specific surface area of 100-400m / g and the porosity factor of 0.4-1.5cm / g. When the olefinic polymerization catalyst is used for propylene polymerization, the activity of the catalyst can be regulated within the range of 40.0-65.0Kg pp / g Cat, and isotactic index and molecular weight distribution index of polypropylene are also can be adjusted within the wide range. The invention also includes a preparation method of the diaryl acid-2, 4- pentanediol ester.

Description

technical field [0001] The present invention relates to components of a catalyst for olefin polymerization, a method for its preparation and a polymerization method. This catalyst is suitable for homopolymerization or copolymerization of α-olefins such as ethylene, propylene, 1-butene, and isobutene. At the same time, the invention also relates to a new method for preparing the internal electron donor diarylic acid-2,4-pentanediol of the catalyst for olefin polymerization. technical background [0002] Ziegler-Natta catalyst system is the mainstream of catalyst system for industrial olefin polymerization. At present, more than 95% of industrial polyolefin catalysts are Ziegler-Natta supported catalysts, and their synthesis mainly includes two aspects: carrier preparation and internal electron donor development. The development of internal electron donors has promoted the development of olefin polymerization catalysts, which have developed from monobasic esters, such as eth...

Claims

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Application Information

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IPC IPC(8): C08F4/649C08F110/06C08F10/00
Inventor 王立才高占先贾小珑陆康于丽梅李伟郑国彤董庆新蔡世绵
Owner YINGKOU XIANGYANG CATALYST
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