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A preparation method of porous polymeric ionic liquid for carbon dioxide adsorption

A technology for polymerizing ionic liquids and carbon dioxide, applied in separation methods, chemical instruments and methods, gas treatment, etc., can solve problems such as small interface area, hindering industrial applications, unfavorable gas dissolution and diffusion, etc.

Active Publication Date: 2017-12-12
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 adsorption

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Embodiment 1

[0015] Example 1: Get 3g of 1-vinyl-3-butylimidazolium hydroxide (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 over, vacuum filter the product to remove the solvent, wash it three times with absolute ethanol and deionized water, then place it in a vacuum freezer, use liquid nitrogen as the coolant, and carry out vacuum sublimation at minus 80°C. It is 3kPa, and the treatment time is 24 hours, and a white solid powder is obtained, which is a porous polymeric ionic liquid.

Embodiment 2

[0016] Embodiment 2: Get 3g of 1-vinyl-3-butylimidazolium hydroxide (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 over, vacuum filter the product to remove the solvent, wash it three times with absolute ethanol and deionized water, then place it in a vacuum freezer, use liquid nitrogen as the coolant, and carry out vacuum sublimation at minus 100°C. It is 5kPa, and the treatment time is 48 hours, and a white solid powder is obtained, which is a porous polymeric ionic liquid.

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Abstract

The invention discloses a preparation method for a porous polymeric ionic liquid for carbon dioxide adsorption, and belongs to the technical field of polymeric ionic liquids. The preparation method comprises the following steps: by taking an alkali polymerizable ionic liquid which takes negative ions as hydroxy radicals (OH-) as a polymeric monomer, introducing carbon dioxide into a polymerization reactor in the polymerization process, enabling the carbon dioxide to be combined with the hydroxy radicals, performing low-temperature vacuum freezing on the obtained polymeric ionic liquid, removing the carbon dioxide by using a sublimation method under the condition of being lower than the freezing point of the carbon dioxide, and forming a great amount of pores in the polymeric ionic liquid in the sublimation process of the carbon dioxide, thereby preparing an alkali polymeric ionic liquid with a relatively large specific surface area and a pore volume. As the hydroxy radicals are re-exposed on the surface of the polymeric ionic liquid, the prepared porous polymeric ionic liquid has the property of adsorbing carbon dioxide.

Description

technical field [0001] The invention relates to a preparation method of a porous polymeric ionic liquid used for carbon dioxide adsorption, and belongs to the technical field of polymeric ionic liquids. 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 have more advantages in industrial continuous applications. The methods reported in the literature for immobilizing ionic liquids into granular mat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26B01J20/30B01D53/02
CPCB01D53/02B01D2253/202B01D2257/504B01J20/261B01J20/3085B01J2220/4812Y02C20/40
Inventor 张傑李英霞黄崇品武静陈标华
Owner BEIJING UNIV OF CHEM TECH
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