CN1327934C - Method for absorbing SO2 gas by alcoholamine carboxylate ion liquid - Google Patents
Method for absorbing SO2 gas by alcoholamine carboxylate ion liquid Download PDFInfo
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- CN1327934C CN1327934C CNB2005100694066A CN200510069406A CN1327934C CN 1327934 C CN1327934 C CN 1327934C CN B2005100694066 A CNB2005100694066 A CN B2005100694066A CN 200510069406 A CN200510069406 A CN 200510069406A CN 1327934 C CN1327934 C CN 1327934C
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Abstract
The present invention relates to a method for absorbing SO2 by alcohol amine carboxylate ionic liquid in the chemical field. Etha nolam ine, diethanolamine, triethanolmine, diglycolamine, and the like are neutralized with acetic acid, lactic acid or acid with the similar structure respectively at normal temperature to generate a series of corresponding basic ionic liquid, and the ionic liquid is used for absorbing SO2 (a kind of acidic gas) under the conditions of normal temperature and pressure in a mode of pure liquid or in a mode that the liquid is loaded on the carrier. The present invention has the advantages of high absorption efficiency, short equilibration time, etc.
Description
Technical field:
The present invention relates to absorb SO with a kind of with alcoholamine carboxylate ion liquid in the chemical field
2The application of gas.
Background technology:
Ionic liquid is by organic cation and inorganic or organic anion constitutes, be the salt of liquid condition under near temperature normal temperature or the normal temperature.Ionic liquid is as a kind of emerging solvent and reaction medium, because unique physicochemical properties such as it is non-volatile, structure can design, having a extensive future of fields such as extract and separate, catalytic reaction, be expected to replace volatile environmentally harmful conventional organic solvents in 21 century.
In recent years because deleterious acidic gas (SO
2, NO
xAnd CO
2) pollution is serious day by day, and the limitation of existing treatment technology, a lot of people consider with ionic liquid as the solvent that absorbs sour gas.But a lot of ionic liquids of existing research are all very little to these Gas Solubility, and have limitation such as the big cost height of viscosity.The present invention is on the basis of considering the problems referred to above, adopts a class alcoholamine carboxylate ion liquid to absorb sour gas SO
2
Summary of the invention
The present invention adopts a class alcoholamine carboxylate ion liquid to absorb sour gas SO
2
The ionic liquid that is adopted among the present invention is an alcoholamine carboxylate ion liquid, be to be made of cations such as monoethanolamine, diethanol amine, triethanolamine or diglycolamine and acetate or lactic acid anion, and cationic anionic all is not limited to above-mentioned several.
In temperature range is under-50 ℃ to 20 ℃, and pressure absorbs SO with the synthetic ionic liquid of institute in normal pressure to 100 atmospheric pressure
2SO wherein
2Be pure SO
2Gas or contain SO
2Mist, ionic liquid is with the neat liquid form or load on form on other carriers.
The specific embodiment:
The present invention illustrates with following example, but the present invention is not limited to following embodiment, under the scope of described aim, changes and implements to be included in the technical scope of the present invention before and after not breaking away from.
Embodiment 1
Synthetic ion liquid experimental provision mainly is a there-necked flask, on put the condensing reflux pipe, and dropping funel and agitating device are housed, because the raw material viscosity of synthetic reaction is bigger, so stir with mechanical agitator.The monoethanolamine of accurate weighing is placed flask, and open agitator and stir, under high-speed stirred, dropwise drip lactic acid solution, the mole of lactic acid equates with monoethanolamine, drips off in 60 minutes.And at room temperature reacted 20 hours.At last with gained liquid 50 ℃ of dryings 48 hours in vacuum drying chamber, at last ionic liquid of ethanolamine lactate.
The ionic liquid of ethanolamine lactate of accurate weighing is placed an absorption bottle, and absorption bottle places 25 ℃ water bath with thermostatic control, is placed with stirring rotator in the absorption bottle, is placed with magnetic stirring apparatus under the absorption bottle.Speed with 5ml/min feeds SO in absorption bottle
2Gas is opened magnetic stirring apparatus simultaneously.The weighing absorption bottle heavily no longer changes visual its up to the absorption bottle weight and reaches balance at regular intervals.Reached balance in about 3 hours, the final SO that is absorbed that gets
2With the mol ratio of ionic liquid of ethanolamine lactate be 0.89.
Embodiment 2
Synthetic ion liquid experimental provision mainly is a there-necked flask, on put the condensing reflux pipe, and dropping funel and agitating device are housed, because the raw material viscosity of synthetic reaction is bigger, so stir with mechanical agitator.The monoethanolamine of accurate weighing is dissolved in absolute ethyl alcohol and places flask, and open agitator and stir, under high-speed stirred, dropwise drip the acetate ethanolic solution, the mole of acetate equates with monoethanolamine, drips off in 60 minutes.And at room temperature reacted 20 hours.Reaction finishes the back rotary evaporation and removes most of solvent, at last with gained liquid 50 ℃ of dryings 48 hours in vacuum drying chamber, at last the monoethanolamine acetate.
The monoethanolamine acetate ion liquid of accurate weighing is placed an absorption bottle, and absorption bottle places 25 ℃ water bath with thermostatic control, is placed with stirring rotator in the absorption bottle, is placed with magnetic stirring apparatus under the absorption bottle.Speed with 5ml/min feeds SO in absorption bottle
2Gas is opened magnetic stirring apparatus simultaneously.The weighing absorption bottle heavily no longer changes visual its up to the absorption bottle weight and reaches balance at regular intervals.Reached balance in about 3 hours, final the SO that absorbs
2With the mol ratio of monoethanolamine acetate ion liquid be 1.85.
Embodiment 3
Synthetic ion liquid experimental provision mainly is a there-necked flask, on put the condensing reflux pipe, and dropping funel and agitating device are housed, because the raw material viscosity of synthetic reaction is bigger, so stir with mechanical agitator.The triethanolamine of accurate weighing is placed flask, and open agitator and stir, under high-speed stirred, dropwise drip lactic acid solution, the mole of lactic acid equates with the mole of triethanolamine, dripped off in 60 minutes.And at room temperature reacted 20 hours.At last with gained liquid 50 ℃ of dryings 48 hours in vacuum drying chamber, at last the triethanolamine lactate.
The triethanolamine lactate ions liquid of accurate weighing is placed an absorption bottle, and absorption bottle places 25 ℃ water bath with thermostatic control, is placed with stirring rotator in the absorption bottle, is placed with magnetic stirring apparatus under the absorption bottle.Speed with 5ml/min feeds SO in absorption bottle
2Gas is opened magnetic stirring apparatus simultaneously.The weighing absorption bottle heavily no longer changes visual its up to the absorption bottle weight and reaches balance at regular intervals.Reached balance in about 3 hours, final the SO that absorbs
2With the mol ratio of triethanolamine lactate ions liquid be 0.98.
Embodiment 4
Synthetic ion liquid experimental provision mainly is a there-necked flask, on put the condensing reflux pipe, and dropping funel and agitating device are housed, because the raw material viscosity of synthetic reaction is bigger, so stir with mechanical agitator.The triethanolamine of accurate weighing is dissolved in absolute ethyl alcohol and places flask, and open agitator and stir, under high-speed stirred, dropwise drip the ethanolic solution of acetate, the mole of acetate equates with the mole of triethanolamine, dripped off in 60 minutes.And at room temperature reacted 20 hours.Reaction finishes the back rotary evaporation and removes most of solvent, at last with gained liquid 50 ℃ of dryings 48 hours in vacuum drying chamber, at last the triethanolamine acetate.
The triethanolamine acetate ion liquid of accurate weighing is placed an absorption bottle, and absorption bottle places 25 ℃ water bath with thermostatic control, is placed with stirring rotator in the absorption bottle, is placed with magnetic stirring apparatus under the absorption bottle.Speed with 5ml/min feeds SO in absorption bottle
2Gas is opened magnetic stirring apparatus simultaneously.The weighing absorption bottle heavily no longer changes visual its up to the absorption bottle weight and reaches balance at regular intervals.Reached balance in about 3 hours, final the SO that absorbs
2With the mol ratio of triethanolamine acetate ion liquid be 1.91.
Claims (7)
1. one kind absorbs SO with alcoholamine carboxylate ion liquid
2The method of gas is characterized in that alcoholamine carboxylate ion liquid is applied to absorb SO
2Gas.
2. method according to claim 1, the ion liquid cation of employing is cations such as monoethanolamine, diethanol amine, triethanolamine or diglycolamine.
3. method according to claim 1, adopting ion liquid anion is acetate ion or lactate ion.
4. method according to claim 1, alcoholamine carboxylate ion liquid absorbs SO
2Temperature range be-50 ℃ to 20 ℃.
5. method according to claim 1, alcoholamine carboxylate ion liquid absorbs SO
2Pressure limit within normal pressure to 100 atmospheric pressure.
6. method according to claim 1, the SO that such ionic liquid absorbs
2Be pure SO
2Gas and contain SO
2Mist.
7. method according to claim 1, such ionic liquid absorbs SO with neat liquid form and the form that loads on other carriers
2
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100694066A CN1327934C (en) | 2005-05-09 | 2005-05-09 | Method for absorbing SO2 gas by alcoholamine carboxylate ion liquid |
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| CNB2005100694066A CN1327934C (en) | 2005-05-09 | 2005-05-09 | Method for absorbing SO2 gas by alcoholamine carboxylate ion liquid |
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| CN1698928A CN1698928A (en) | 2005-11-23 |
| CN1327934C true CN1327934C (en) | 2007-07-25 |
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| CNB2005100694066A Expired - Fee Related CN1327934C (en) | 2005-05-09 | 2005-05-09 | Method for absorbing SO2 gas by alcoholamine carboxylate ion liquid |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101537300B (en) * | 2009-04-17 | 2011-08-10 | 合肥工业大学 | Recyclable sulfur dioxide gas absorbent and preparation method thereof |
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| GB2444614A (en) * | 2005-09-30 | 2008-06-11 | Bioniqs Ltd | Alkanoyl ammonium salts as ionic liquids |
| CN101628876B (en) * | 2008-07-15 | 2012-07-04 | 南京理工大学 | Method for synthesizing ionic liquid of ethanolamine lactate |
| CN102516092A (en) * | 2011-12-14 | 2012-06-27 | 南京大学扬州化学化工研究院 | Dicarboxylic hydrogen salt ionic liquid with asymmetric chemical structure and weak acidity, and preparation method thereof |
| CN102911151B (en) * | 2012-07-12 | 2014-10-22 | 盐城师范学院 | Method for water-phase synthesis of benzoxanthene derivatives |
| CN103007688B (en) * | 2012-12-24 | 2014-09-24 | 中国科学院过程工程研究所 | Ion solvent for absorbing and separating SO2 in industrial gases |
| CN103432864B (en) * | 2013-07-09 | 2016-09-28 | 南京信息工程大学 | A kind of absorb the organic solution of sulfur dioxide in gaseous mixture |
| CN103521036B (en) * | 2013-10-10 | 2015-10-28 | 浙江大学 | A kind of method adopting metal chelate ionic liquid capture sulfur dioxide |
| CN104162342B (en) * | 2014-08-18 | 2016-04-20 | 南京信息工程大学 | A kind of compound ionic liquid desulfurization and decarburization agent and its preparation method and application |
| CN104402733A (en) * | 2014-09-30 | 2015-03-11 | 河北科技大学 | Low-carbon straight-chain primary amine ionic liquid used for absorbing SO2 and preparation method and application thereof |
| CN105727888A (en) * | 2014-12-11 | 2016-07-06 | 中国石油化工股份有限公司 | Reproducible SO2 adsorbent and preparation method therefor |
| CN105194982A (en) * | 2015-10-14 | 2015-12-30 | 黄锐 | Ionic liquid capable of absorbing sulfur dioxide as well as preparation method and application of ionic liquid |
| CN106854478A (en) * | 2015-12-08 | 2017-06-16 | 中国石油化工股份有限公司 | A kind of absorbing liquid containing ionic liquid activator |
| CN113233989B (en) * | 2021-05-27 | 2022-07-29 | 湖南西林环保材料有限公司 | 1, 4-trihydroxyethylbenzdiammonium sulfate, 1,3, 5-trihydroxyethylbenztriammonium sulfate, synthesis and application thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1385243A (en) * | 2002-06-07 | 2002-12-18 | 华东师范大学 | Diacetone acrylic amide type ionic liquid and preparation thereof |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1385243A (en) * | 2002-06-07 | 2002-12-18 | 华东师范大学 | Diacetone acrylic amide type ionic liquid and preparation thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101537300B (en) * | 2009-04-17 | 2011-08-10 | 合肥工业大学 | Recyclable sulfur dioxide gas absorbent and preparation method thereof |
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| CN1698928A (en) | 2005-11-23 |
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