Olefinic polymerization catalyst, preparation method and polymerization method

A technology for olefin polymerization and catalyst, which is applied in the fields of olefin polymerization catalyst, preparation and polymerization, and can solve the problems of limited application of polyolefin and narrow molecular weight distribution of polyolefin.

Active Publication Date: 2011-03-23
YINGKOU XIANGYANG CATALYST
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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 1141285A) and other compounds prepared as electron donors have the highest catalyst activity today, and can even save external electrons body, but the molecular weight distribution of polyolefin is narrow, which limits the application of polyolefin

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] a) alcoholate preparation:

[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 (hereinafter referred to as DIBP) 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 tita...

Embodiment 2

[0042] In step b) of Example 1, 3.0 mmol of 2-(2-thiophenecarboxylic acid)-4-(p-ethylbenzoic acid)pentanediol ester was added at 70°C instead of 2,2 / -dimethoxy -1,1 / -binaphthalene, add 1.0ml of DIBP (diisobutyl phthalate) at 110°C to add 2-(p-isopropylbenzoic acid)-4-(3,5-dimethyl Base benzoate) pentanediol ester, other steps are with embodiment 1.

[0043] The catalyst activity is 53.7KgPP / g.Cat; the apparent density of the polymer is 0.44g / cm 3 ; Polymer isotactic index 96.7%.

Embodiment 3

[0045] In step b) of Example 1, 3.0 mmol of 2-(2-thiophenecarboxylic acid)-4-(p-ethylbenzoic acid)pentanediol ester was added at 70°C instead of 2,2 / -dimethoxy -1,1 / -binaphthalene, add 1.0ml of DIBP (diisobutyl phthalate) at 110°C instead of 2,4-bis(2-naphthoic acid)pentanediol ester, other steps are carried out in the same way example 1.

[0046] The catalyst activity is 54.6KgPP / g.Cat; the apparent density of the polymer is 0.44g / cm 3 ; Polymer isotactic index 97.7%.

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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, and C is external electron donor and organic silicon compound; wherein, the A component contains titanium, magnesium and chlorine elements as well as internal electron donor which is the combination of 2, 4- diaryl acid pentanediol ester (PBA) and 1, 3-diether (BMF), the combination of the PBA and 1, 4- diaryl ether (BN), or the combination of PBA and aromatic acid ester. The olefinic polymerization catalyst has higher catalytic activity, the activity of the catalyst used for propylene polymerization can be regulated within the range of 40.0-120.0Kg pp / gCat, and isotactic index and molecular weight distribution index of polypropylene are also can be adjusted within the wide range.

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. technical background [0002] Ziegler-Natta catalysts are the mainstream catalysts 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 Ziegler-Natta catalysts, which have developed from monobasic acid esters, such as ethyl benzoate and ethyl p-ethoxybenzoate, to dibasic arylates, such as o-phthalic acid esters. Di-n-butyl dicarboxylate, diisobutyl phthalate, dioctyl phthalate, etc. The catalyst composed of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F4/649C08F10/06C08F10/00
Inventor 王立才高占先贾小珑胡珊珊李伟郑国彤董庆新宋巨伟蔡世绵
Owner YINGKOU XIANGYANG CATALYST
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