A method for removing trace water in a solvent for preparing polymer materials by slurry method

A polymer material, slurry technology, applied in chemical instruments and methods, ion exchange, ion exchange regeneration, etc., can solve production safety accidents, catalyst deactivation and other problems

Active Publication Date: 2022-02-08
SOUTHWEST PETROLEUM UNIV
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  • Abstract
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Problems solved by technology

However, based on years of experience in the application of the slurry method, strict control of the impurity content of various substances in the reaction system is a key factor to ensure the normal progress of the polymerization pr

Method used

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  • A method for removing trace water in a solvent for preparing polymer materials by slurry method
  • A method for removing trace water in a solvent for preparing polymer materials by slurry method
  • A method for removing trace water in a solvent for preparing polymer materials by slurry method

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Embodiment 1

[0016] First weigh 25mL of NaOH solution with a concentration of 1.2mol / L, pour it into a 500mL beaker placed on a magnetic stirrer with a rotation speed of 800rpm, add 3.50g of β-cyclodextrin, 0.75g of carboxymethylcellulose and 0.20g of Silicon carbide, continue stirring for 10 minutes after feeding, then add 5.85g of 1,4-butanediol diglycidyl ether, continue stirring for 15-30 minutes, pour 250mL of liquid paraffin, raise the temperature to 45°C, and keep stirring. After 36 hours, the reaction product was washed 3 times with a mixture of deionized water and acetone with a volume ratio of 2:1, and then washed 3 times with deionized water, and dried in vacuum at -40°C for 48 hours to obtain adsorbent particles with a particle size of 3.20 mm. Spherical particles 4.62g.

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Abstract

The present invention is based on the requirements for the water content of the solvent when the polymer material is prepared by the slurry method, and provides a method for the preparation of an adsorbent and the synergistic use of microwaves, which is characterized in that silicon carbide, microcrystalline cellulose, and carboxymethyl cyclopa Ethyl alcohol and butanediol glycidyl ether were dissolved in sodium hydroxide solution, stirred evenly, poured into octadecane, suspended and polymerized for 36 hours, washed and freeze-dried to obtain porous hydrophilic adsorbent microspheres with different particle sizes. The preparation method of the adsorbent is simple and easy, and the trace water in the solvent is removed through the adsorption bed under the radiation of the microwave field, and has the characteristics of low energy, high efficiency and easy operation.

Description

technical field [0001] The invention relates to a slurry removal method for preparing polymer materials. Background technique [0002] In the production process of polymer materials such as polyethylene and polypropylene, the slurry method is considered to be the most important production method. This method can produce different grades of products by changing the combination of polymerization kettles and process parameters. , has the advantages of high catalyst activity, less dosage, simplified process, less equipment and low utility consumption. However, based on years of experience in the application of the slurry method, strict control of the impurity content of various substances in the reaction system is a key factor to ensure the normal progress of the polymerization process, especially the hexane solvent used in the slurry method. If the water content ω(H 2 O) Super 10×10 -6 The catalyst will be deactivated, which will lead to a series of production safety accident...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/28B01J20/30B01D15/08
CPCB01J20/265B01J20/28016B01J20/28054B01D15/08
Inventor 周炬鲜邹长军
Owner SOUTHWEST PETROLEUM UNIV
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