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Method for absorbing SO2 gas by alcoholamine carboxylate ion liquid

A technology of alcohol amine carboxylate and ionic liquid, which is applied in the chemical industry and can solve the problems of low gas solubility, high viscosity, and high cost

Inactive Publication Date: 2005-11-23
北京中科艾内茵科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, many ionic liquids currently studied have very small solubility to these gases, and have limitations such as high viscosity and high cost.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] The experimental device for synthesizing ionic liquids is mainly a three-neck flask with a condensing reflux tube on it, and is equipped with a dropping funnel and a stirring device. Due to the high viscosity of the raw materials for the synthesis reaction, a mechanical stirrer is used to stir them. Put accurately weighed ethanolamine in the flask, and turn on the stirrer to stir. Under high-speed stirring, add lactic acid solution drop by drop. The molar amount of lactic acid is equal to that of ethanolamine, and the drop is completed within 60 minutes. And react at room temperature for 20 hours. Finally, the obtained liquid was dried in a vacuum oven at 50° C. for 48 hours to obtain ethanolamine lactate ionic liquid.

[0009] Place the accurately weighed ethanolamine lactate ionic liquid in an absorption bottle, which is placed in a constant temperature water bath at 25° C., a stirring rotor is placed in the absorption bottle, and a magnetic stirrer is placed under th...

Embodiment 2

[0011] The experimental device for synthesizing ionic liquids is mainly a three-neck flask with a condensing reflux tube on it, and is equipped with a dropping funnel and a stirring device. Due to the high viscosity of the raw materials for the synthesis reaction, a mechanical stirrer is used to stir them. Dissolve accurately weighed ethanolamine in absolute ethanol and put it in a flask, and turn on the stirrer to stir. Under high-speed stirring, add the acetic acid ethanol solution drop by drop. The molar amount of acetic acid is equal to that of ethanolamine. Drop in 60 minutes Finish. And react at room temperature for 20 hours. After the reaction was completed, most of the solvent was removed by rotary evaporation, and finally the obtained liquid was dried in a vacuum oven at 50° C. for 48 hours to obtain ethanolamine acetate.

[0012] Place the accurately weighed ethanolamine acetate ionic liquid in an absorption bottle, which is placed in a constant temperature water ba...

Embodiment 3

[0014] The experimental device for synthesizing ionic liquids is mainly a three-neck flask with a condensing reflux tube on it, and is equipped with a dropping funnel and a stirring device. Due to the high viscosity of the raw materials for the synthesis reaction, a mechanical stirrer is used to stir them. Put accurately weighed triethanolamine in the flask, and turn on the stirrer to stir. Under high-speed stirring, add lactic acid solution drop by drop. The molar amount of lactic acid is equal to that of triethanolamine, and the dripping is completed within 60 minutes. And react at room temperature for 20 hours. Finally, the obtained liquid was dried in a vacuum oven at 50° C. for 48 hours to obtain triethanolamine lactate.

[0015] Place the accurately weighed triethanolamine lactate ionic liquid in an absorption bottle, place the absorption bottle in a constant temperature water bath at 25°C, place a stirring rotor in the absorption bottle, and place a magnetic stirrer und...

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PUM

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Abstract

This invention relates to a method of absorbing SO2 gas by the hydramine carboxylate ion liquid, which belongs to the chemical field. In the normal temperature, the aminoethyl alcohol, diethylehthanolamine, triethanolamine, and the diglycol have neutralization reaction with the acetic acid, lactic acid or the acid with similar structure, and then create a series of corresponding alkaline ion liquor. It cost small balancing time through using that ion liquor or loaded in the carrier to absorb the acid gas SO2.

Description

[0001] Technical field: the present invention relates to the use of a kind of alcohol amine carboxylate ionic liquid to absorb SO in the field of chemical industry 2 gas application. Background technique: [0002] Ionic liquids are salts composed of organic cations and inorganic or organic anions that are liquid at or near normal temperature. As a new solvent and reaction medium, ionic liquid has broad application prospects in the fields of extraction, separation and catalytic reaction due to its unique physical and chemical properties such as non-volatility and designable structure. It is expected to replace volatile and environmentally harmful solvents in the 21st century. traditional organic solvents. [0003] In recent years, due to acidic harmful gas (SO 2 , NO x and CO 2 ) pollution is becoming more and more serious, and the limitations of existing treatment technology, many people consider using ionic liquid as a solvent for absorbing acid gas. However, many ionic ...

Claims

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Application Information

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IPC IPC(8): B01D53/14
Inventor 张锁江袁晓亮陈玉焕张延强
Owner 北京中科艾内茵科技有限公司
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