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Method for preparing Ziegler Natta catalyst by taking porous polymer microsphere as carrier

A porous polymer and Ziegler-Natta technology, which is applied in the field of preparation of porous polymer microsphere-supported Ziegler-Natta catalysts, can solve the problem of not preparing porous polymer microsphere-supported Ziegler-Natta catalysts And other issues

Active Publication Date: 2010-06-16
芜湖万隆新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, so far, there has been no report on the preparation of porous polymer microsphere-supported Ziegler-Natta catalysts using the above-mentioned monodisperse porous polymer microspheres as a carrier.

Method used

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  • Method for preparing Ziegler Natta catalyst by taking porous polymer microsphere as carrier
  • Method for preparing Ziegler Natta catalyst by taking porous polymer microsphere as carrier
  • Method for preparing Ziegler Natta catalyst by taking porous polymer microsphere as carrier

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preparation example Construction

[0025] A preparation method of a porous polymer microsphere-supported Ziegler-Natta catalyst, comprising:

[0026] a) reacting porous polymer microspheres with alkylmagnesium chloride in a solvent to obtain a first reaction product;

[0027] b) combining the first reaction product with TiCl 4 obtaining a second reaction product in a solvent;

[0028] c) forming the Ziegler-Natta catalyst supported by porous polymer microspheres with the second reaction product and co-catalyst.

[0029] According to the present invention, the monomers of the porous polymer microspheres preferably include: styrene, divinylbenzene and acrylonitrile.

[0030] For the preparation method of most porous polymer microspheres, the present invention is not particularly limited, for example, it can be prepared according to the method of Chinese patent CN101434673A, and the specific steps include:

[0031] 1) Preparation of linear polystyrene seed microspheres

[0032] Add styrene, ethanol, ethylene g...

Embodiment 1

[0052] Prepare polystyrene seed microspheres by dispersion polymerization, add 10g styrene, 44g ethanol, 44g ethylene glycol monomethyl ether, 0.1g Azobisisobutyronitrile, 2g PVP K-30, set the stirring speed to 120rpm, insert the nitrogen gas tube below the liquid level for replacement for 30min, then move the nitrogen gas tube above the liquid level, turn on the cooling water, and raise the temperature of the system to 70°C After stirring continuously for 24 hours, the reaction was terminated, the reaction liquid was settled by centrifugation, the upper liquid was removed, the precipitate was washed several times with ethanol and water respectively, and dried in a vacuum oven for 24 hours to obtain polystyrene seed particles with a particle size of 1.5 μm. ball.

Embodiment 2

[0054] (1) Prepare 90 g of ethanol water with 0.25 wt% sodium dodecylsulfonate, and the mass ratio of ethanol and water in the ethanol water is 5:1.

[0055] (2) The concentration prepared in 25g step (1) is the aqueous ethanol solution of 0.25wt% sodium dodecylsulfonate, adding 0.5g of polystyrene seed microspheres with a particle diameter of 1.5 μm prepared in Example 1, and ultrasonically Disperse for 10 minutes.

[0056] (3) Get the ethanol aqueous solution of 0.25wt% sodium dodecylsulfonate prepared in 25g step (1), add 0.5g 1-chlorododecane swelling aid, ultrasonic dispersion, ultrasonic time depends on the ultrasonic effect emulsion droplet Less than 0.5μm.

[0057] (4) Mix the seeds dispersed in step (2) with the swelling aid dispersed in step (3), place in a 250ml four-necked flask equipped with mechanical stirring, reflux condenser, nitrogen conduit, and thermometer, at 30 Swell for 12 hours at ℃, 120rpm, and the swelling time is subject to the swelling of the co-s...

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Abstract

The embodiment of the invention discloses a method for preparing a Ziegler Natta catalyst by taking a porous polymer microsphere as a carrier. The method comprises the following steps: reacting the porous polymer microsphere with alkyl magnesium chloride in a solvent to obtain a first reaction product; reacting the first reaction product with TiCl4 in the solvent to obtain a second reaction product; and allowing the second reaction product and a promoter to form the Ziegler Natta catalyst by taking the porous polymer microsphere as the carrier. In the method, the first reaction product which is the porous polymer microsphere with Mg-Cl bond is prepared by reacting the alkyl magnesium chloride with the porous polymer microsphere; the prepared first reaction product reacts with TiCl4 through the Mg-Cl bond to generate Mg-Cl-Ti bridged bond and obtain the second reaction product; and the promoter and the second reaction product form the Ziegler Natta catalyst by taking the porous polymer microsphere as the carrier, and the promoter ensures that the second reaction product has the catalytic activity.

Description

technical field [0001] The invention relates to the field of catalyst systems for olefin polymerization, in particular to a preparation method of porous polymer microsphere-supported Ziegler-Natta catalysts. Background technique [0002] Polyolefin has the advantages of high cost performance, good mechanical properties and stable thermal properties. It is widely used in various fields such as industry, agriculture, medical care and daily life. It is an important polymer material. Ziegler-Natta catalysts are generally used to polymerize olefin monomers. have to. Ziegler-Natta catalyst is an organometallic catalyst. In 1956, German organic chemist Ziegler discovered TiCl 4 / Et 3 The Al system can effectively catalyze the polymerization of ethylene at a lower pressure, and then the Italian chemist Natta developed this catalytic system for the isotactic polymerization of propylene, butadiene, isopentene, etc. These catalysts were later called Ziegler-Natta (Ziegler Natta) cat...

Claims

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Application Information

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IPC IPC(8): B01J31/22B01J32/00B01J31/06C08F10/02C08F4/654C08F4/645C08F4/02C07C2/22
Inventor 周光远雷金化李栋梁
Owner 芜湖万隆新材料有限公司