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A preparation method of porous polymeric ionic liquid for carbon dioxide capture/absorption

A technology for polymerizing ionic liquids and carbon dioxide, applied in separation methods, chemical instruments and methods, educts, etc., can solve the problems of high viscosity of ionic liquids, unfavorable gas dissolution and diffusion, small interface area, etc., and achieve strong carbon dioxide adsorption capacity Effect

Active Publication Date: 2017-06-20
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this type of ionic liquid has a high viscosity and a small interfacial area when mixed, which is not conducive to the dissolution and diffusion of gas in the ionic liquid, and hinders the gas in the CO 2 Industrial Applications in Capture

Method used

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  • A preparation method of porous polymeric ionic liquid for carbon dioxide capture/absorption

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Embodiment 1

[0015] Example 1: Get 3g of 1-vinyl-3-aminoimidazole hydrobromide (about 0.01mol), 2.36g of divinylbenzene (55%, about 0.01mol) and 0.00536g of initiator azobisiso Butyronitrile In a 100ml three-neck flask, add 50ml of a mixed solution of ethanol and water as a solvent (the volume ratio of ethanol and water is 1:1). During the reaction, CO was passed through the three-necked flask 2 gas, heated to 60°C for polymerization, and the reaction was maintained for 6 hours. After the reaction is finished, vacuum filter the product to remove the solvent, wash it three times with absolute ethanol and deionized water, and then place it in a vacuum treatment box for vacuum treatment at 150°C. The operating pressure is 5kPa, and the treatment time is 10 hours. A white solid powder is obtained, which is a porous polymeric ionic liquid.

Embodiment 2

[0016] Example 2: Get 3g of 1-vinyl-3-aminoimidazole hydrobromide (about 0.01mol), 2.36g of divinylbenzene (55%, about 0.01mol) and 0.0536g of initiator azobisiso Butyronitrile In a 100ml three-necked flask, add 50ml of a mixed solution of ethanol and water as a solvent (the volume ratio of ethanol and water is 3:1). During the reaction, CO was passed through the three-necked flask 2 gas, heated to 100°C for polymerization, and the reaction was maintained for 6 hours. After the reaction is finished, vacuum filter the product to remove the solvent, wash it three times with absolute ethanol and deionized water, then place it in a vacuum treatment box, and carry out vacuum treatment at 240°C. The operating pressure is 10kPa, and the treatment time is 24 hours. A white solid powder is obtained, which is a porous polymeric ionic liquid.

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Abstract

A p reparation method of a porous polymerized ionic liquid used for capture / absorption of CO2 belongs to the technical field of polymerized ionic liquids. In the invention, an ionic liquid monomer, of which the cations have amino groups, is polymerized to form the polymerized ionic liquid, wherein CO2 is fed into a polymerizing reactor during the polymerization process so that the CO2 is combined with the amino groups. The polymerized ionic liquid then is used for removing the CO2 at a high temperature and under a low pressure, wherein a large quantity of pores are formed during the CO2 removal process, thereby preparing the polymerized ionic liquid which has large specific surface area and large pore volume. Meanwhile, the amino groups are exposed out of the surface of the polymerized ionic liquid again, so that the porous polymerized ionic liquid can be used for adsorbing the CO2.

Description

technical field [0001] The invention relates to a method for preparing a porous polymeric ionic liquid for carbon dioxide adsorption, more specifically, the present invention prepares a porous polymeric ionic liquid capable of absorbing carbon dioxide by introducing carbon dioxide during the polymerization and then removing it after polymerization. Background technique [0002] Ionic liquids (Ionic Liquids) are environmentally friendly functional materials developed in recent years. They are salts composed of specific cations and anions. The immobilization of ionic liquids is a hot issue in this field. By immobilizing ionic liquids on different carriers, it has the characteristics of both ionic liquids and porous carrier materials, which is conducive to expanding the interface area and shortening the diffusion path. , to overcome the mass transfer problem of ionic liquids in practical applications, to make them more stable, to achieve separation and reuse after use, and to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F226/06C08F212/36C08J9/30B01D53/14
CPCB01D53/1475B01D53/1493B01D2252/30C08F212/36C08F226/06C08J9/30C08J2325/16C08J2339/04Y02C20/40Y02P20/151
Inventor 张傑李英霞黄崇品武静陈标华
Owner BEIJING UNIV OF CHEM TECH
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