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CO2 trapping agent and preparation method thereof

A capture agent, 24-hour technology, applied in separation methods, chemical instruments and methods, dispersed particle separation, etc., can solve the problems of slow speed and low capture capacity, and achieve the effect of simple equipment, high capture capacity and low volatility

Inactive Publication Date: 2014-07-23
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these capture agents have lower capture capacity and slower speed than alkanolamines

Method used

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  • CO2 trapping agent and preparation method thereof
  • CO2 trapping agent and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0022] (1) Add 1.2 moles of 1-cyanoethyl imidazole and 1.0 moles of 2-chloroethyl methyl ether and 66 ml of toluene to the reaction kettle, stir at room temperature for 30 minutes, and heat up to 60°C at a speed of 10°C / min , stirred at a constant temperature of 60°C for 8 hours, lowered to room temperature, extracted the reaction solution four times with 200 ml of cyclohexane, removed excess 1-cyanoethylimidazole and unreacted 2-chloroethyl methyl ether, and vacuumed at 60°C Dry for 24 hours to remove the residual toluene to obtain the intermediate product 1-cyanoethyl-3-ethyl ether imidazolium chloride salt.

[0023] (2) Prepare 1-cyanoethyl-3-ethyl ether imidazolium chloride salt into 1N absolute ethanol solution, and pass the solution through 717 type strong basic type I anion exchange resin to obtain 1-cyanoethyl hydroxide -Ethanol solution of 3-ethyl ether imidazole, remove ethanol by rotary evaporator to obtain 1-cyanoethyl-3-ethyl ether imidazole hydroxide;

[0024] (...

Embodiment 2

[0026] (1) Add 1.2 moles of 1-cyanoethyl imidazole and 1.0 moles of 2-chloroethyl methyl ether and 66 ml of toluene into the reaction kettle, stir at room temperature for 30 minutes, and heat up to 60°C at a speed of 10°C / min. Stir the reaction at a constant temperature of 60°C for 10 hours, then lower it to room temperature, extract the reaction solution four times with 200ml cyclohexane, remove excess 1-cyanoethylimidazole and unreacted 2-chloroethyl methyl ether, and dry it in vacuum at 60°C Residual toluene was removed in 24 hours to obtain the intermediate product 1-cyanoethyl-3-ethyl etherimidazolium chloride salt;

[0027] (2) Prepare 1-cyanoethyl-3-ethyl ether imidazolium chloride salt into 1N absolute ethanol solution, and pass the solution through 717 type strong basic type I anion exchange resin to obtain 1-cyanoethyl hydroxide -Ethanol solution of 3-ethyl ether imidazole, remove ethanol by rotary evaporator to obtain 1-cyanoethyl-3-ethyl ether imidazole hydroxide; ...

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Abstract

The invention relates to a CO2 trapping agent and a preparation method thereof. Chemical formula of the CO2 trapping agent is represented by formula (I). The preparation method comprises following steps: (1) 1-cyanoethyl imidazole and 2-chloroethyl methyl ether are subjected to electrophilic addition so as to prepare an intermediate product 1-cyanoethyl-3-ethyl methyl ether imidazole chloride; (2) anion exchange resin is used to transform 1-cyanoethyl-3-ethyl methyl ether imidazole chloride into hydroxide 1-cyanoethyl-3-ethyl methyl ether imidazole; and (3) hydroxide 1-cyanoethyl-3-ethyl methyl ether imidazole and tricyano methanoic acid are subjected to neutralization reaction so as to obtain the CO2 trapping agent. Advantages of the CO2 trapping agent are that: trapping capacity is high, trapping speed is high, absorption enthalpy is low, and the CO2 trapping agent can be used for trapping CO2 in the air.

Description

technical field [0001] The invention relates to a gas capture agent and a preparation method thereof, in particular to a CO 2 The capture agent and its preparation method belong to the technical field of new chemical materials and its preparation. Background technique [0002] Global warming caused by the "greenhouse effect" is considered to be one of the most urgent environmental problems today. It is generally believed that the main cause of the "greenhouse effect" is the emission of greenhouse gases into the atmosphere. Among them, carbon dioxide (CO 2 ) is the most important greenhouse gas, which mainly comes from the burning of fossil fuels such as coal and oil. [0003] reduce CO 2 One way of emission is to efficiently capture CO from the air 2 . CO 2 Once captured, it can be sequestered in geological rock formations or used as a raw material for the synthesis of organic fuels and chemical products. [0004] Currently, there are a variety of CO 2 capture metho...

Claims

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Application Information

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IPC IPC(8): B01D53/14
CPCY02A50/20Y02C20/40
Inventor 徐海涛欧阳伟徐玉韬
Owner NANCHANG HANGKONG UNIVERSITY
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