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Porous silica gel supported ionic liquid polymer for adsorbing CO2 and preparation method thereof

An ionic liquid, porous silica gel technology, applied in separation methods, educts, chemical instruments and methods, etc., can solve the problems of small specific surface area, unfavorable gas dissolution and diffusion, unfavorable large-scale industrial applications, etc., and achieve good adsorption performance. Effect

Active Publication Date: 2016-04-20
ZHONGYING CHANGJIANG INTERNATIONAL NEW ENERGY INVESTMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, ionic liquids are directly used to separate CO 2 , its high viscosity and small specific surface area are not conducive to the dissolution and diffusion of gases, and it is not convenient for the desorption and recovery of ionic liquids, which is not conducive to large-scale industrial applications.

Method used

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  • Porous silica gel supported ionic liquid polymer for adsorbing CO2 and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] an adsorbed CO 2 The preparation method of porous silica gel immobilized ionic liquid polymer 1, comprises the following steps:

[0033] 1) Weigh 2-bromoethylamine hydrobromide, N-vinylimidazole, N-vinylimidazole and lithium bistrifluoromethanesulfonylimide in a molar ratio of 1:1:1, and mix 2-bromoethylamine Ethylamine hydrobromide and N-vinylimidazole were placed in a round-bottomed flask and mixed evenly, then absolute ethanol was added, and the time was 20 minutes at a temperature of 25°C. Among them, 2-bromoethylamine hydrobromide and The volume ratio of the total volume of N-vinylimidazole to absolute ethanol is 1:2;

[0034] 2) The temperature of the solution obtained in step 1) was raised to 80° C., and then maintained at a constant temperature for 25 hours, and then titrated and neutralized with a 10% NaOH solution to a pH of 7;

[0035] 3) Use a rotary evaporator to remove the ethanol and water contained in the solution obtained in step 2) neutralization rea...

Embodiment 2

[0044] an adsorbed CO 2 The preparation method of porous silica gel immobilized ionic liquid polymer 2, comprises the following steps:

[0045] 1) Weigh 2-bromoethylamine hydrobromide, N-vinylimidazole, N-vinylimidazole and lithium bistrifluoromethanesulfonylimide in a molar ratio of 1:1.2:1, and mix 2-bromoethylamine Ethylamine hydrobromide and N-vinylimidazole were placed in a round-bottomed flask and mixed evenly, then absolute ethanol was added, and the time was 10 minutes at a temperature of 30°C. Among them, 2-bromoethylamine hydrobromide and The volume ratio of the total volume of N-vinylimidazole to absolute ethanol is 1:3;

[0046] 2) The temperature of the solution obtained in step 1) was raised to 90° C., and then maintained at a constant temperature for 20 h, and then titrated and neutralized with a KOH solution with a mass fraction of 15% until the pH was 7;

[0047] 3) Use a rotary evaporator to remove the ethanol and water contained in the solution obtained in...

Embodiment 3

[0056] an adsorbed CO 2 The preparation method of porous silica gel immobilized ionic liquid polymer 3, comprises the following steps:

[0057] 1) Weigh 2-bromoethylamine hydrobromide, N-vinylimidazole, N-vinylimidazole and lithium bistrifluoromethanesulfonylimide in a molar ratio of 1:1:1.5, and mix 2-bromoethylamine Ethylamine hydrobromide and N-vinylimidazole were placed in a round-bottomed flask and mixed evenly, then absolute ethanol was added, and the time was 30 minutes at a temperature of 20°C. Among them, 2-bromoethylamine hydrobromide and The volume ratio of the total volume of N-vinylimidazole to absolute ethanol is 1:1;

[0058] 2) The temperature of the solution obtained in step 1) is raised to 70° C., and then kept at a constant temperature for 30 hours, and then the mass fraction is 8% Ca(OH) 2 The solution is titrated and neutralized to a pH of 7;

[0059] 3) Use a rotary evaporator to remove the ethanol and water contained in the solution obtained in step 2...

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Abstract

The invention discloses a porous silica gel supported ionic liquid polymer for adsorbing CO2 and a preparation method thereof. Raw materials of the porous silica gel supported ionic liquid polymer comprise porous silicon dioxide, 1-ethyl-3-ethylamino imidazole bi-fluoroform sulfonyl imide ion solution and azodiisobutyronitrile. According to the method, the porous silicon dioxide and the 1-ethyl-3-ethylamino imidazole bi-fluoroform sulfonyl imide ion solution are added into absolute ethyl alcohol; after the materials are mixed and uniformly stirred, the temperature is raised to 60 to 70 DEG C; then, the azodiisobutyronitrile is added; the constant temperature is maintained for reaction for 8 to 10h to obtain reaction liquid; then, the reaction liquid is put in an environment under the condition of 90 to 100 DEG C to be subjected to Soxhlet extraction for 12 to 24h; the porous silica gel supported ionic liquid polymer for adsorbing CO2 is obtained. The ionic liquid polymer for adsorbing CO2 can be singly used as an adsorbent for adsorbing CO2, and can also be used in a way of being compounded with other adsorption or absorption materials, and the adsorption performance is better.

Description

technical field [0001] The invention relates to a carbon dioxide capture material, in particular to a CO2-absorbing material 2 A porous silica gel-immobilized ionic liquid polymer and a preparation method thereof. Background technique [0002] In recent years, by CO 2 The frequent occurrence of extreme climate events caused by greenhouse gases, which account for more than 60%, has resulted in increased human deaths, environmental degradation, decreased plant production capacity, and retreated glaciers. With the increasingly severe environmental crisis, human beings have increased their awareness of environmental protection and reduced CO 2 Emission reduction and resource utilization are the key topics of global research in the 21st century. In 2008, my country's CO 2 The emissions have reached 6.8 billion tons, ranking first in the world. At the 2009 Copenhagen Climate Summit, my country proposed that by 2020 CO 2 The goal of reducing emissions by 40% to 45% compared w...

Claims

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Application Information

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IPC IPC(8): C08F126/06C08K3/36B01D53/02
CPCB01D53/02B01D2253/202B01D2257/504C08F126/06C08K3/36Y02C20/40Y02P20/151
Inventor 王志龙
Owner ZHONGYING CHANGJIANG INTERNATIONAL NEW ENERGY INVESTMENT CO LTD
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