CN103007688B - Ion solvent for absorbing and separating SO2 in industrial gases - Google Patents
Ion solvent for absorbing and separating SO2 in industrial gases Download PDFInfo
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- CN103007688B CN103007688B CN201210568157.5A CN201210568157A CN103007688B CN 103007688 B CN103007688 B CN 103007688B CN 201210568157 A CN201210568157 A CN 201210568157A CN 103007688 B CN103007688 B CN 103007688B
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Abstract
The invention belongs to the technical field of gas purification, and relates to an ion solvent for absorbing SO2 in industrial gases. The ion solvent is a system formed by imidazole derivatives and conventional ionic liquids, and the system has the advantages of large absorbing capacity, low viscosity and easiness for regeneration, which can be used as the absorbent of SO2 and other acidic gases.
Description
Technical field:
The invention belongs to gas purification technique field, relate in industrial gas and contain SO
2purification, specifically SO in a kind of absorption and separation industrial gasses
2ion solvent.
Background technology:
China is coal production and consumption big country, has brought serious environmental pollution, particularly SO taking coal as main energy resource structure to China
2discharge make China become the multiple country of acid rain.China SO according to statistics
2average annual concentration reaches national grade ii standard (0.06mg/m
3) city account for 74.3%, exceed national grade III Standard (0.10mg/m
3) city account for 9.1% of statistics city, there is 298, the city (account for statistics city 56.5%) of acid rain.SO
2the short range impact of polluting is serious harm resident health, animal husbandry, agricultural and urban architecture facility, long-range impact is to form acid rain, relates to the area outside a thousand li, and the direct economic loss causing exceedes and exceeds 100 billion, this has become one of key factor of restriction socio-economic development, so to SO
2discharge carry out effectively administering most important.
Flue gas desulfurization is to control SO
2the technical way polluting.External flue gas desulfurization technique research starts from the fifties in 19th century.Since the sixties in 20th century, the states such as the U.S., Germany, Japan have started the broad scale research exploitation and application to flue gas desulfurization technique, the flue gas desulfurization technique of operation at present, great majority are traditional desulfur technologies: Wet Flue Gas Desulfurization Technique, semi-dry desulphurization technology and desulfurization by dry method.Wherein wet desulphurization is the most ripe, most widely used, but also has more defect, and as corrosion, can it directly affect system and move with security and stability.Dry method, Summary of Semi-dry Flue Gas Desulfurization have reduced investment, take up an area the advantages such as few, and shortcoming is that reaction speed is slow, and desulfurization degree is low, absorbent utilization rate is low, and wearing and tearing, scale formation is more serious, and aspect plant maintenance, difficulty is larger, stability, the reliability of equipment operation are not high, and the life-span is shorter etc.
In recent years, ionic liquid is applied to flue gas desulfurization research as a kind of novel green solvent, has development prospect widely.Application number is to have synthesized respectively alcoholamine carboxylate ion liquid in the Chinese patents such as 200510069406.6,200810025024.7 and 200910116567.4, dicarboxylic acids class ionic liquid, and cyclammonium class ionic liquid is for SO
2absorption.But these functionalized ion liquids are synthetic complicated at present, cost is high, and viscosity is all larger simultaneously, and in absorption process, mass transfer rate is slow, has limited its industrial applications.
Absorb SO for current ionic liquid
2exist problem, the present invention propose utilize imdazole derivatives and conventional ion liquid composite, form novel ion solvent for SO
2absorption, this ion solvent uptake is large, viscosity is low, can recycle.
Summary of the invention:
The object of this invention is to provide SO in a kind of absorption and separation industrial gasses
2ion solvent.
Absorption SO of the present invention
2ion solvent is the system of imdazole derivatives and the composite formation of conventional ion liquid.
Ion solvent of the present invention, wherein ionic liquid mass fraction scope is: 10% ~ 60%.
Imdazole derivatives of the present invention, its general structure is as follows:
Wherein, R
1for H atom, CH
3or C
2h
5; R
2for H atom, C
nh
2n+1(n is integer, 1≤n≤8).
Conventional ion liquid anion of the present invention is BF
4 -, PF
6 -, NTf
2 -, NO
3 -, HSO
3 -, HSO
4 -, H
2pO
4 -, Cl
-, Br
-, I
-, SCN
-deng; Cationic structural general formula is as follows:
Wherein, R
1for H atom, CH
3or C
2h
5; R
2for C
nh
2n+1(n is integer, 1≤n≤8); R
3for C
nh
2n+1(n is integer, 1≤n≤4);
Ion solvent of the present invention, absorption temperature is: 10 ~ 60 DEG C, absorption pressure: 0.1 ~ 3.0MPa; Regeneration condition: 70 ~ 150 DEG C, 0.01 ~ 1.0Mpa; Absorbent after regeneration can recycle.
Ion solvent of the present invention can be for SO
2volumetric concentration scope, in 0.01% ~ 20% gas sweetening, is applicable to the SO of the heterogeneity systems such as industrial coal flue gas, metallurgy industry flue gas, steamer tail gas, waste gas of sulphuric acid plant
2absorb.
The advantages such as it is large that ion solvent of the present invention has uptake, and viscosity is low, easy regeneration, the present invention is SO in industrial gasses
2absorption and separation a kind of new method is provided.
Detailed description of the invention:
Embodiment 1
Get 8.1gN-methylimidazole and 7.7g1-ethyl-3-methylimidazole tetrafluoroborate ([Emim] BF
4) in round-bottomed flask (N-methylimidazole content is 51%), 23 DEG C, under 0.1MPa, absorb SO
2after 55min, absorbent has increased 14.3g, and the uptake of ion solvent reaches 0.9g SO
2/ g absorbent.
Embodiment 2
Get 6.4g N-ethyl imidazol(e) and 6.4g1-butyl-3-methylimidazole hexafluorophosphate ([Bmim] PF
6) in round-bottomed flask (N-methylimidazole content is 50%), 13 DEG C, under 0.1MPa, absorb SO
2after 160min, absorbent has increased 17.5g, and the uptake of ion solvent reaches 1.3g SO
2/ g absorbent.
Embodiment 3
Get 11.6g1-methyl-N-butyl imidazole and 1.3g chlorination 1-butyl-2-methyl-3-methylimidazole salt ([Bmmim] Cl) (N-methylimidazole content is 90%) in round-bottomed flask, 13 DEG C, under 0.1MPa, absorb SO
2after 100min, absorbent has increased 18.8g, and the uptake of ion solvent reaches 1.4g SO
2/ g absorbent.
Embodiment 4
Get 6.5g1-ethyl-N-butyl imidazole and 6.5g N-butyl-pyridinium nitrate ([BPy] NO
3) in round-bottomed flask (N-methylimidazole content is 50%), 15 DEG C, under 0.1MPa, absorb SO
2after 120min, absorbent has increased 12.7g, and the uptake of ion solvent reaches 1.0g SO
2/ g absorbent.
Claims (4)
1. SO in absorption and separation industrial gasses
2ion solvent, it is characterized in that, described ion solvent is the system that imdazole derivatives and conventional ion liquid form, ion solvent intermediate ion liquid mass fraction scope is: 10%～60%, described imdazole derivatives, its general structure is as follows:
Wherein, R
1for H atom, CH
3or C
2h
5; R
2for H atom, C
nh
2n+1, wherein n is integer, 1≤n≤8;
Described conventional ion liquid anion is BF
4 -, PF
6 -, NTf
2 -, NO
3 -, HSO
3 -, HSO
4 -, H
2pO
4 -, Cl
-, Br
-, I
-, SCN
-; Cationic structural general formula is as follows:
Wherein, R
1for H atom, CH
3or C
2h
5; R
2for C
nh
2n+1, wherein n is integer, 1≤n≤8; R
3for C
nh
2n+1wherein n is integer, 1≤n≤4.
2. ion solvent according to claim 1, absorbs temperature: 10～60 DEG C, and absorption pressure: 0.1～3.0MPa.
3. ion solvent according to claim 1, ion solvent can regeneration, regeneration condition: 70～150 DEG C, 0.01～1.0MPa.
4. ion solvent according to claim 1, applicable industrial gasses comprise industrial coal flue gas, metallurgy industry flue gas, steamer tail gas, waste gas of sulphuric acid plant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210568157.5A CN103007688B (en) | 2012-12-24 | 2012-12-24 | Ion solvent for absorbing and separating SO2 in industrial gases |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210568157.5A CN103007688B (en) | 2012-12-24 | 2012-12-24 | Ion solvent for absorbing and separating SO2 in industrial gases |
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| Publication Number | Publication Date |
|---|---|
| CN103007688A CN103007688A (en) | 2013-04-03 |
| CN103007688B true CN103007688B (en) | 2014-09-24 |
Family
ID=47957127
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
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Country Status (1)
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| CN (1) | CN103007688B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105327687A (en) * | 2015-11-19 | 2016-02-17 | 华侨大学 | CO2 absorbent as well as preparation method and application thereof |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107088349B (en) * | 2017-06-28 | 2020-06-26 | 重庆科技学院 | Compound ionic liquid desulfurizer and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19858473A1 (en) * | 1998-12-17 | 2000-06-21 | Linde Ag | Desulfurization of gas containing variable amounts of hydrogen sulfide and carbon oxysulfide comprises scrubbing the gas with a variable mixture of chemical and physical absorbents |
| CN1698928A (en) * | 2005-05-09 | 2005-11-23 | 中国科学院过程工程研究所 | Method for absorbing SO2 gas by alcoholamine carboxylate ion liquid |
| CN1709553A (en) * | 2005-06-02 | 2005-12-21 | 中国科学院过程工程研究所 | Amino acid ion liquid for acidic gas absorption |
| CN101274204A (en) * | 2007-03-28 | 2008-10-01 | 成都华西化工研究所 | Absorbing agent for removing and recovering sulfur dioxide from gaseous mixture |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101107203B1 (en) * | 2010-08-19 | 2012-01-25 | 한국과학기술연구원 | Sulfur dioxide absorbent containing ionic liquid |
| JP2012219018A (en) * | 2011-04-04 | 2012-11-12 | Asahi Kasei Corp | Phosphorus atom-containing ionic liquid |
-
2012
- 2012-12-24 CN CN201210568157.5A patent/CN103007688B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19858473A1 (en) * | 1998-12-17 | 2000-06-21 | Linde Ag | Desulfurization of gas containing variable amounts of hydrogen sulfide and carbon oxysulfide comprises scrubbing the gas with a variable mixture of chemical and physical absorbents |
| CN1698928A (en) * | 2005-05-09 | 2005-11-23 | 中国科学院过程工程研究所 | Method for absorbing SO2 gas by alcoholamine carboxylate ion liquid |
| CN1709553A (en) * | 2005-06-02 | 2005-12-21 | 中国科学院过程工程研究所 | Amino acid ion liquid for acidic gas absorption |
| CN101274204A (en) * | 2007-03-28 | 2008-10-01 | 成都华西化工研究所 | Absorbing agent for removing and recovering sulfur dioxide from gaseous mixture |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2012-219018A 2012.11.12 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105327687A (en) * | 2015-11-19 | 2016-02-17 | 华侨大学 | CO2 absorbent as well as preparation method and application thereof |
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| CN103007688A (en) | 2013-04-03 |
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