CN103111160B - Method for absorbing NO2 gas by using imidazolium ionic liquid composite material - Google Patents
Method for absorbing NO2 gas by using imidazolium ionic liquid composite material Download PDFInfo
- Publication number
- CN103111160B CN103111160B CN201310090184.0A CN201310090184A CN103111160B CN 103111160 B CN103111160 B CN 103111160B CN 201310090184 A CN201310090184 A CN 201310090184A CN 103111160 B CN103111160 B CN 103111160B
- Authority
- CN
- China
- Prior art keywords
- ionic liquid
- composite material
- gas
- liquid composite
- absorption
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Abstract
The invention discloses a method for absorbing NO2 gas by using an imidazolium ionic liquid composite material. The method comprises the following steps of: step A, mixing an imidazolium ionic liquid with organic alkali to prepare the imidazolium ionic liquid composite material, wherein the mole use amount ratio of the imidazolium ionic liquid to the organic alkali is 1:(1-5); step B, absorbing and separating the NO2 gas, namely, passing the NO2-containing gas to be treated through the imidazolium ionic liquid composite material obtained in the step A so as to absorb and separate the NO2; and step C, deabsorbing the NO2 gas. The method can be used for overcoming the defects of the prior art, has the characteristics of uniqueness in method, environmental friendliness, simplicity in process, high NO2 absorption efficiency, circulation and reuse of the absorbing material, resource utilization of the obtained NO2 gas and the like, and is applicable to industrial continuous operation.
Description
Technical field
The present invention relates to ionic liquid environmental protection application and gas denitrifying technology field, particularly relate to a kind of for cyclic absorption NO
2the ionic liquid composite material of gas.
Background technology
Nitrogen oxide (NOx) is one of index of the contaminant transport model of China during " 12 ".Wherein, nitrogen dioxide (NO
2) come from fuel combustion, automotive emission and some chemical industry process, be wherein main source with the flue gas of coal-burning power plant.NO
2not only can form acid rain, cause photochemical fog, also be the main cause forming haze weather, health and environment are caused and greatly threatens and destroy.
Existing gas denitrifying technology divides wet method and dry method two class, dry method mainly comprises selective-catalytic-reduction denitrified (SCR), SNCR denitration (SNCR), plasma activation, absorption method etc., and wet method comprises alkaline solution absorption method, oxidative absorption method, absorbs reducing process and Absorption via Chemical Complexation etc.The advantages such as Dry denitration technology often operating cost is higher, and wet denitration technology has that operating temperature is low, process equipment is simple, less energy consumption, disposal cost are low, but there is the solution after absorbing waste gas and be difficult to process, easily cause the problem of secondary pollution.
The new demand of reply wet denitration technology, ionic liquid has good prospect due to the physicochemical properties of its uniqueness in denitrating flue gas.Ionic liquid by organic cation and inorganic or organic anion is formed, below 100 DEG C in the salt of liquid condition, there is the features such as steam forces down, electric conductivity is high, stable chemical nature, solvability strong, room temperature is in a liquid state.Duan etc. (Journal of the Air & Waste Management Association, 2011,61,1393) have studied NO
2the absorption of gas in caprolactam-tetrabutyl ammonium halide ionic liquid, NO when finding 25 DEG C
2the molar fraction solubility of gas in caprolactam-TBAB ionic liquid, up to 0.809, amounts to 0.355gNO
2/ g ionic liquid, illustrates good application prospect.It is 1500cp(Journal of Hazardous Materials that this seminar there was reported the viscosity of this ionic liquid 50 DEG C time, 2011,194,48) and, as NO
2gas absorbent, the application industrially of higher viscosity means higher energy consumption.Along with denitrating technique research deeply, find that uptake is large, energy consumption is low, be convenient to realize NO
2the New Absorbent of recycling is current urgent task.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of ionic liquid composite material be made up of glyoxaline ion liquid and organic base and absorbs NO
2the method of gas, the method can overcome the deficiencies in the prior art, has that method uniqueness, environmental friendliness, technical process are simple, NO
2the NO that absorption efficiency is high, absorbing material can recycle, obtain
2gas can the feature such as recycling, is applicable to industrial continuous operation.
For solving the problems of the technologies described above, the technical solution used in the present invention is as follows.
Imidazolium ionic liquid composite material is utilized to absorb NO
2the method of gas, its step comprises:
A, to mix obtained ionic liquid composite material with organic base by glyoxaline ion liquid, wherein, the mole dosage of glyoxaline ion liquid and organic base is than being 1:(1-5);
B, NO
2the absorption and separation of gas: make containing NO
2pending gas by steps A gained ionic liquid composite material, carry out NO
2absorption and separation;
C, NO
2the De contamination of gas.
As a preferred technical solution of the present invention, in steps A, described glyoxaline ion liquid is 1-butyl-3-methyl imidazolium tetrafluoroborate, 1-butyl-3-methylimidazole hexafluorophosphate or 1-ethyl-3-methylimidazole trifluoroacetate; Described organic base is N-alkyl imidazole or replaces amine; Alkyl in described N-alkyl imidazole comprises methyl, ethyl, propyl group or butyl; Described replacement amine is monoethanolamine, diethanol amine, triethanolamine or tri-n-butylamine.
As a preferred technical solution of the present invention, the technological parameter in step B is: absorption pressure is 0.1kPa-0.1MPa, and temperature range is 20 DEG C-100 DEG C, NO
2the flow velocity of gas is 1mL/min-60mL/min.
As a preferred technical solution of the present invention, the technological parameter in step B is: normal pressure, and temperature range is 20 DEG C-30 DEG C, NO
2the flow velocity of gas is 10mL/min-20mL/min.
As a preferred technical solution of the present invention, in step C, adopt heating under reduced pressure or nitrogen sweeping method desorption NO from ionic liquid composite material
2gas, realizes recycling and NO of ionic liquid composite material
2the recovery of gas.
As a preferred technical solution of the present invention, the technological parameter of step C is: desorption pressures is 0.1kPa-0.1MPa, and desorption temperature is 20 DEG C-100 DEG C.
As a preferred technical solution of the present invention, the technological parameter of step C is: desorption pressures is 4kPa-10kPa, and desorption temperature is 70 DEG C-100 DEG C.
As a preferred technical solution of the present invention, its step comprises:
A, precise 1-ethyl-3-methylimidazole trifluoroacetate and triethanolamine or N-ethyl imidazol(e), namely obtain EMIMTA ionic liquid composite material in room-temperature, homogenous mixing;
B, EMIMTA ionic liquid composite material is put into absorption plant, at 25 DEG C, in absorption bottle, pass into NO with the speed of 30mL/min
2gas, weighed the weight of absorption bottle until constant weight every ten minutes;
C, NO
2the De contamination of gas: adopt heating under reduced pressure or nitrogen sweeping method desorption NO from ionic liquid composite material
2gas, realizes recycling and NO of ionic liquid composite material
2the recovery of gas.
As another kind of optimal technical scheme of the present invention, its step comprises:
A, precise 1-butyl-3-methyl imidazolium tetrafluoroborate and N-butyl imidazole, namely obtain BMIMBF in room-temperature, homogenous mixing
4ionic liquid composite material;
B, by BMIMBF
4ionic liquid composite material puts into absorption plant, at 25 DEG C, pass into NO with the speed of 30mL/min in absorption bottle
2gas, weighed the weight of absorption bottle until constant weight every ten minutes;
C, NO
2the De contamination of gas: adopt heating under reduced pressure or nitrogen sweeping method desorption NO from ionic liquid composite material
2gas, realizes recycling and NO of ionic liquid composite material
2the recovery of gas.
As another kind of optimal technical scheme of the present invention, its step comprises:
A, precise 1-butyl-3-methylimidazole hexafluorophosphate and tri-n-butylamine or N-methylimidazole, namely obtain BMIMPF in room-temperature, homogenous mixing
6ionic liquid composite material;
B, by BMIMPF
6ionic liquid composite material puts into absorption plant, at 25 DEG C, pass into NO with the speed of 30mL/min in absorption bottle
2gas, weighed the weight of absorption bottle until perseverance every ten minutes;
C, NO
2the De contamination of gas: adopt heating under reduced pressure or nitrogen sweeping method desorption NO from ionic liquid composite material
2gas, realizes recycling and NO of ionic liquid composite material
2the recovery of gas.
The beneficial effect adopting technique scheme to produce is: ionic liquid composite material of the present invention can be used for the desulfurization removing nitric aspect of flue gas, compare existing desulfurization removing nitric technology, there is the advantages such as high-selenium corn amount, low energy consumption, non-secondary pollution and efficent use of resources; The present invention has good application prospect as gas absorbent.Its concrete beneficial effect is described below:
1. ionic liquid composite material of the present invention by allocating the proportioning of ionic liquid and N-alkyl imidazole, can obtain different physical propertys (such as different density, viscosity, water-soluble etc.), to facilitate at different occasion choice for uses; And this composite preparation process is simple, raw material sources are extensive, make method of the present invention be convenient to preparation of industrialization.
2. the fusing point of ionic liquid composite material of the present invention is all lower than 10 DEG C, and this makes this material be all exist with liquid condition in very wide temperature range, is conducive to the absorption mass transfer of gas.
3. ionic liquid composite material of the present invention is the viscosity of 25 DEG C to be generally less than 20cp, and compared with the ionic liquid gas absorbent of existing bibliographical information, viscosity is far smaller than ionic liquid itself, such as BMIMBF
4be 110.308cp the viscosity of 25 DEG C; Lower viscosity means lower energy consumption, makes absorption and desorption process easily realize continuous operation.
4. ionic liquid composite material of the present invention is at absorption NO
2front and back remain liquid, as a comparison, applicant adopts acetamide-potassium rhodanide ionic liquid composite material to carry out the absorption of nitrogen dioxide, not only uptake is very little, and ionic liquid composite material is easy to solidification after absorption nitrogen dioxide, form chewing gum sample paste sample, viscosity is larger, cause being difficult to industrially continuous-flow type continuous operations, and imidazolium ionic liquid composite material of the present invention has lower viscosity, all all exist with liquid condition before and after using, make absorption and desorption process easily realize continuous operation.
5. imidazolium ionic liquid composite material mass-transfer efficiency of the present invention is high, and purification efficiency is high, and saturated absorption amount reaches as high as 0.844gNO
2/ g; Compared with the 0.355gNO of prior art
2/ g has the progressive significantly improving and give prominence to.
6. ionic liquid composite material of the present invention is at absorption NO
2can to be purged by nitrogen after gas or the method for heating under reduced pressure carries out desorb, and then to realize reusing; This composite recycles Be very effective, NO
2absorption efficiency remains on more than 99%, demonstrates very excellent adsorption-desorption performance; Further, isolated NO
2gas can also use as nitrogenous source, avoids the wasting of resources.
Detailed description of the invention
Following examples describe the present invention in detail.Various raw material used in the present invention and items of equipment are conventional commercial product, all can be bought by market and directly obtain.
Embodiment 1
1) precise 1-ethyl-3-methylimidazole trifluoroacetate (EMIMTA) 3.38g and triethanolamine 3.02g, namely obtains EMIMTA ionic liquid composite material in room-temperature, homogenous mixing.
2) 6.40gEMIMTA ionic liquid composite material is put into absorption bottle, at 25 DEG C, in absorption bottle, pass into NO with the speed of 30mL/min
2gas.The weight of absorption bottle is weighed until constant weight every ten minutes.Obtaining Balance Absorption amount is 0.844g/g.
3) NO will be absorbed with
2imidazolium ionic liquid composite material be loaded in cucurbit, water pump decompression under (4.24kPa) in 100 DEG C of distillations, every ten minutes weighing absorption bottle weight until constant weight.The imidazolium ionic liquid composite material be quantitatively recycled, continues the absorption process be applied to next time.This process carries out 4 times continuously, NO in ionic liquid composite material
2removal efficiency remains on more than 99%, and the ionic liquid composite material of recovery is to NO
2uptake keeps constant.
Embodiment 2
1) precise 1-butyl-3-methyl imidazolium tetrafluoroborate (BMIMBF
4) 3.00g and N-butyl imidazole 2.97g, namely obtain BMIMBF in room-temperature, homogenous mixing
4ionic liquid composite material.
2) by 5.97gBMIMBF
4ionic liquid composite material puts into absorption bottle, at 22 DEG C, pass into NO with the speed of 25mL/min in absorption bottle
2gas.The weight of absorption bottle is weighed until constant weight every ten minutes.Obtaining Balance Absorption amount is 0.469gNO
2/ g ionic liquid composite material.
3) NO will be absorbed with
2imidazolium ionic liquid composite material be loaded in cucurbit, water pump decompression under (4kPa) in 100 DEG C of distillations, every ten minutes weighing absorption bottle weight until constant weight.The imidazolium ionic liquid composite material be quantitatively recycled, continues the absorption process be applied to next time.This process carries out 4 times continuously, NO in ionic liquid composite material
2removal efficiency remains on more than 99%, and the ionic liquid composite material of recovery is to NO
2uptake keeps constant.
Embodiment 3
1) precise 1-ethyl-3-methylimidazole trifluoroacetate (EMIMTA) 4.05g and N-ethyl imidazol(e) 4.06g, namely obtains EMIMTA ionic liquid composite material in room-temperature, homogenous mixing.
2) 8.11gEMIMTA ionic liquid composite material is put into absorption bottle, at 25 DEG C, in absorption bottle, pass into NO with the speed of 30mL/min
2gas.The weight of absorption bottle is weighed until constant weight every ten minutes.Obtaining Balance Absorption amount is 0.479g/g.
3) NO will be absorbed with
2imidazolium ionic liquid composite material be loaded in cucurbit, water pump decompression under (4.5kPa) in 100 DEG C of distillations, every ten minutes weighing absorption bottle weight until constant weight.The imidazolium ionic liquid composite material be quantitatively recycled, continues the absorption process be applied to next time.This process carries out 4 times continuously, NO in ionic liquid composite material
2removal efficiency remains on more than 99%, and the ionic liquid composite material of recovery is to NO
2uptake keeps constant.
Embodiment 4
1) precise 1-butyl-3-methylimidazole hexafluorophosphate (BMIMPF
6) 3.11g and tri-n-butylamine 3.13g, namely obtain BMIMPF in room-temperature, homogenous mixing
6ionic liquid composite material.
2) by 6.24gBMIMPF
6ionic liquid composite material puts into absorption bottle, at 28 DEG C, pass into NO with the speed of 35mL/min in absorption bottle
2gas.The weight of absorption bottle is weighed until constant weight every ten minutes.Obtaining Balance Absorption amount is 0.326gNO
2/ g ionic liquid composite material.
3) NO will be absorbed with
2imidazolium ionic liquid composite material be loaded in cucurbit, water pump decompression under (4.5kPa) in 100 DEG C of distillations, every ten minutes weighing absorption bottle weight until constant weight.The imidazolium ionic liquid composite material be quantitatively recycled, continues the absorption process be applied to next time.This process carries out 4 times continuously, NO in ionic liquid composite material
2removal efficiency remains on more than 99%, and the ionic liquid composite material of recovery is to NO
2uptake keeps constant.
Embodiment 5
1) precise 1-butyl-3-methylimidazole hexafluorophosphate (BMIMPF
6) 4.08g and N-methylimidazole 3.89g, namely obtain BMIMPF in room-temperature, homogenous mixing
6ionic liquid composite material.
2) by 7.97gBMIMPF
6ionic liquid composite material puts into absorption bottle, at 25 DEG C, pass into NO with the speed of 30mL/min in absorption bottle
2gas.The weight of absorption bottle is weighed until constant weight every ten minutes.Obtaining Balance Absorption amount is 0.242gNO
2/ g ionic liquid composite material.
3) NO will be absorbed with
2imidazolium ionic liquid composite material be loaded in cucurbit, water pump decompression under (4.5kPa) in 100 DEG C of distillations, every ten minutes weighing absorption bottle weight until constant weight.The imidazolium ionic liquid composite material be quantitatively recycled, continues the absorption process be applied to next time.This process carries out 4 times continuously, NO in ionic liquid composite material
2removal efficiency remains on more than 99%, and the ionic liquid composite material of recovery is to NO
2uptake keeps constant.
Embodiment 6
Applicant finds out technical scheme of the present invention by a large amount of tests, and early stage has been carried out contrast test in research, such as:
1. compare as with of the present invention, by 8.59gBMIMBF
4ionic liquid puts into absorption bottle, at 25 DEG C, pass into NO with the speed of 30mL/min in absorption bottle
2gas.The weight of absorption bottle is weighed until constant weight every ten minutes.Obtaining Balance Absorption amount is 0.233gNO
2/ gBMIMBF
4.By contrast display ionic liquid compound absorbing material of the present invention, there is higher saturated absorption rate.
2. compare as with of the present invention, by 4.08gBMIMPF
6ionic liquid puts into absorption bottle, at 25 DEG C, pass into NO with the speed of 30mL/min in absorption bottle
2gas.The weight of absorption bottle is weighed until constant weight every ten minutes.Obtaining Balance Absorption amount is 0.037gNO
2/ gBMIMPF
6.
3. as a comparison, 4.05gEMIMTA ionic liquid is put into absorption bottle, at 25 DEG C, in absorption bottle, NO is passed into the speed of 30mL/min
2gas.The weight of absorption bottle is weighed until constant weight every ten minutes.Obtaining Balance Absorption amount is 0.435gNO
2/ gEMIMTA.
Foregoing description only proposes, not as the single restrictive condition to its technical scheme itself as the enforceable technical scheme of the present invention.
Claims (1)
1. utilize imidazolium ionic liquid composite material to absorb NO
2the method of gas, its characterization step comprises:
1) precise 1-ethyl-3-methylimidazole trifluoroacetate 3.38g and triethanolamine 3.02g, namely obtains EMIMTA ionic liquid composite material in room-temperature, homogenous mixing;
2) 6.40gEMIMTA ionic liquid composite material is put into absorption bottle, at 25 DEG C, in absorption bottle, pass into NO with the speed of 30mL/min
2gas; The weight of absorption bottle is weighed until constant weight every ten minutes;
3) NO will be absorbed with
2imidazolium ionic liquid composite material be loaded in cucurbit, water pump is decompressed to 4.24kPa in 100 DEG C of distillations, weighs the weight of absorption bottle until constant weight every ten minutes; The imidazolium ionic liquid composite material be quantitatively recycled, continues the absorption process be applied to next time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310090184.0A CN103111160B (en) | 2013-03-20 | 2013-03-20 | Method for absorbing NO2 gas by using imidazolium ionic liquid composite material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310090184.0A CN103111160B (en) | 2013-03-20 | 2013-03-20 | Method for absorbing NO2 gas by using imidazolium ionic liquid composite material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103111160A CN103111160A (en) | 2013-05-22 |
| CN103111160B true CN103111160B (en) | 2014-12-17 |
Family
ID=48409569
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310090184.0A Expired - Fee Related CN103111160B (en) | 2013-03-20 | 2013-03-20 | Method for absorbing NO2 gas by using imidazolium ionic liquid composite material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103111160B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105214458B (en) * | 2015-09-11 | 2017-09-22 | 河北科技大学 | Absorb SO2Composite absorber and its application method |
| CN106731491A (en) * | 2016-11-22 | 2017-05-31 | 浙江大学 | One kind traps nitric oxide production method using halide anion functionalized ion liquid |
| CN106770602A (en) * | 2017-03-15 | 2017-05-31 | 中国科学院兰州化学物理研究所 | The detection method of micro 1 methylimidazole in a kind of glyoxaline ion liquid |
| CN108514892A (en) * | 2018-04-04 | 2018-09-11 | 江苏华本环境科技有限公司 | A kind of preparation method and applications of low-temperature denitration catalyst |
| CN109621640B (en) * | 2018-12-28 | 2021-02-26 | 河北科技大学 | For absorbing SO2Supported ionic liquid color-changing material and preparation method and application thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101189052B (en) * | 2005-04-07 | 2012-02-08 | 马寺松气体股份有限公司 | fluid storage and purification method and system |
-
2013
- 2013-03-20 CN CN201310090184.0A patent/CN103111160B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101189052B (en) * | 2005-04-07 | 2012-02-08 | 马寺松气体股份有限公司 | fluid storage and purification method and system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103111160A (en) | 2013-05-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103111160B (en) | Method for absorbing NO2 gas by using imidazolium ionic liquid composite material | |
| CN102179137A (en) | Method for treating organic waste gas | |
| CN103878034B (en) | The renovation process of a kind of arsenic and phosphorism denitrifying catalyst with selective catalytic reduction | |
| CN104107629A (en) | System and method for capturing carbon dioxide in smoke | |
| CN103721550A (en) | Absorbent capable of simultaneously performing desulfurization, denitrification and VOCs (Volatile Organic Compounds) removal on flue gas as well as preparation and application of absorbent | |
| CN102527195A (en) | Method for absorbing SO2 gas by using acetamide-inorganic salt eutectic ionic liquid | |
| CN101601961A (en) | Absorb SO with halogenated alkyl quaternary ammonium salt ionic liquid 2The method of gas | |
| CN102824837A (en) | Complete equipment and method for wet processing of sludge incineration offgas | |
| CN102389774A (en) | Method for preparing oil gas absorbing composite material | |
| CN105771553A (en) | Low-concentration formaldehyde waste gas collecting and processing technique and special equipment | |
| CN101537304B (en) | Cyclic amine sulfur dioxide gas absorbent and preparation method thereof | |
| CN102716654A (en) | Method and device for flue gas denitration by spray absorption and electrochemical reduction | |
| CN103170216A (en) | Alcohol amine type ion liquor-containing compound absorbent capable of capturing carbon dioxide | |
| CN104907106A (en) | Waste SCR flue gas denitration catalyst regeneration and recovery integration processing method | |
| CN102671628B (en) | Microporous molecular sieve-functionalized ionic liquid composite material and preparation method thereof | |
| CN105214450B (en) | A kind of selective absorbing SO2Absorbent and absorb SO2Process | |
| CN106362549A (en) | Method for capturing nitric oxide by using amino acid anion functional ionic liquid | |
| CN104772021B (en) | Polyalcohol ethylenediamine solution traps CO in industrial gas2Method | |
| CN109012078A (en) | Hypergravity strengthens composite absorption liquid and removes NOxMethod | |
| CN108993133A (en) | COS, CS in a kind of promotion natural gas2The method of removing | |
| CN102641656A (en) | Ammonia recovery device | |
| CN103331140A (en) | Demercuration adsorbent and preparation method thereof | |
| CN103084034B (en) | Clean treatment method of compound fertilizer granulation tail gas | |
| CN103084035B (en) | Clean treatment device of compound fertilizer granulation tail gas | |
| CN103961978B (en) | A kind of method containing tertiary amine groups and itrile group pyridines functionalized ion liquid capture sulfur dioxide |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141217 Termination date: 20160320 |