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: 2012-04-18
芜湖万隆新材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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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.

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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 alkyl magnesium 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) The second reaction product and the cocatalyst are formed into a porous polymer microsphere-supported Ziegler-Natta 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] In a four-port reactor equipped...

Embodiment 1

[0052] Polystyrene seed microspheres were prepared by dispersion polymerization, and 10g styrene, 44g ethanol, 44g ethylene glycol monomethyl ether, 0.1g were added to a 250ml four-necked flask equipped with mechanical stirring, reflux condenser, nitrogen conduit, and thermometer. Azobisisobutyronitrile, 2g PVP K-30, set the stirring speed to 120rpm, insert the nitrogen conduit below the liquid level for 30min, then move the nitrogen conduit above the liquid level, turn on the cooling water, and heat the system to 70°C , the reaction was terminated after 24 hours of continuous stirring, the reaction solution was centrifuged to settle, the upper layer liquid was removed, the precipitate was washed several times with ethanol and water, and dried in a vacuum drying box for 24 hours to obtain polystyrene seed microparticles with a particle size of 1.5 μm. ball.

Embodiment 2

[0054] (1) 90 g of ethanol water of 0.25wt% sodium dodecyl sulfonate was prepared, and the mass ratio of ethanol and water in the ethanol water was 5:1.

[0055] (2) Take 25 g of the ethanol aqueous solution with a concentration of 0.25 wt% sodium dodecyl sulfonate prepared in step (1), add 0.5 g of polystyrene seed microspheres with a particle size of 1.5 μm prepared in Example 1, and ultrasonically Disperse for 10min.

[0056] (3) take 25g of the 0.25wt% sodium dodecyl sulfonate ethanol aqueous solution prepared in step (1), add 0.5g 1-chlorododecane co-swelling agent, ultrasonically disperse, and the ultrasonic time depends on the ultrasonic effect of emulsion droplets less than 0.5μm.

[0057] (4) mix the seed dispersed in step (2) and the dispersing auxiliary swelling agent in step (3), place in a 250ml four-necked flask equipped with mechanical stirring, reflux condenser, nitrogen conduit, and thermometer, at 30 ℃, 120rpm swelling for 12h, the swelling time is based on...

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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 polymermicrosphere 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, and more particularly, to a preparation method of a Ziegler-Natta catalyst supported by porous polymer microspheres. 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 and agriculture, medical and health care and daily life. It is an important polymer material. Ziegler-Natta catalyst is 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 under lower pressure, and then the Italian chemist Natta developed this catalytic system for the isotactic polymerization of propylene, butadiene, isoprene, etc. These catalysts were later called Ziegler-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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
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