CN104289075B - Loaded type ion liquid for absorbing SO2 gas and preparation method thereof - Google Patents
Loaded type ion liquid for absorbing SO2 gas and preparation method thereof Download PDFInfo
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- CN104289075B CN104289075B CN201410517409.0A CN201410517409A CN104289075B CN 104289075 B CN104289075 B CN 104289075B CN 201410517409 A CN201410517409 A CN 201410517409A CN 104289075 B CN104289075 B CN 104289075B
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Abstract
The invention relates to loaded type ion liquid for absorbing SO2 gas and a preparation method thereof. The loaded type ion liquid is [R1Mim]R2-X, wherein Mim is methylimidazole, R1 is CH3(OCH2CH2)n; R2 is one of 20 types of common amino acids; and a carrier X is active carbon fibers or active carbon. The loaded type ion liquid integrates dual advantages of ether group functionalized ion liquid and a porous material, and the disadvantages of the ion liquid that the viscosity is great, the cost is high and the like are overcome; the adsorption effect on SO2 is greatly improved; the loaded type functionalized ion liquid adopts a chemical bonding manner so that the loss of the ion liquid in an application process is avoided; an adsorbent is easy to regenerate and recycle so that the use amount of the ion liquid is greatly reduced and the cost is lowered; and the loaded type ion liquid for absorbing the SO2 gas is advantageous in the aspect of industrial application.
Description
Technical field
The present invention relates to a kind of ionic liquid, more particularly, to one kind are used for absorbing so2The load-type ion liquid of gas, with
When, the present invention relates to the preparation method of this ionic liquid.
Background technology
Social atmospheric pollution is increasingly severe, especially with so now2Pollution maximum to social influence.so2Can be with the air
O2, vapor be quickly generated h under certain condition2so4, h2so4Fall formation acid rain with rainwater；Can also be with the wafing of in the air
Dirt is combined into particulate, forms fumes of sulphuric acid through a series of chemical actions, affects plant growing, destroys aquatic ecosystem
System, impoverishing the soil, corrosion building etc.；so2Respiratory apparatus to human body and eye mask have stronger stimulation；Institute
To solve so2Emission pollution problem is increasingly urgent.
It is mainly to suppress so using flue gas desulfurization2The commercial run of discharge, the method for current flue gas desulfurization has wet method, does
Method and semi-dry desulphurization.Wherein wet desulphurization is most widely used with limestone/gypsum method, but exists very due in absorption process
How not enough, such as one-time investment is big, and equipment requirements are high, and operating cost is high, the problems such as desulfurizer regeneration high energy consumption, to sulfur removal technology
Have also been proposed new requirement, find absorbability height, selection performance is good, chemical stability is good, be not likely to produce the new of secondary pollution
Type absorbent is increasingly paid close attention to by people.
In recent years, ionic liquid makes it separate in gas absorption as a kind of green solvent due to having nonvolatile feature
Field shows powerful application potential.Ionic liquid is a kind of extremely low volatile organic fuse salt, has almost without steam
Pressure, environmentally safe, can be with the feature of recycle and reuse.Ionic liquid is had significantly compared with traditional absorbent solution
Advantage, can absorb and includes so2In interior multiple gases, this is to absorb so2Provide new approach.Although both at home and abroad to desulfurization work(
The research that ionic liquid can be changed makes some progress, but this kind of viscosity of il is larger, and high cost is deposited in sweetening process
Gas-liquid mass transfer resistance big, application cost is high the problems such as, hinder the process of its industrial applications.
Content of the invention
For solving the deficiencies in the prior art, the invention provides a kind of combined function ionic liquid and porous material
Material two-fold advantage, low cost, be suitable to commercial Application for absorbing so2The load-type ion liquid of gas.
For achieving the above object, the present invention for absorbing so2The load-type ion liquid of gas is [r1mim] r2-x,
Wherein mim is Methylimidazole.；R1 is ch3(och2ch2)n；R2 is one kind of 20 kinds of common amino acids；Carrier x is activated carbon or work
Property Carbon fibe.
This load-type ion liquid is that the functionalization imidazole ion liquid containing ether is loaded to activated carbon or active carbon fibre
On dimension carrier, using-the cooh of the amino in the amino acid anion in ionic liquid and carrier active carbon or NACF
Base combines to form the load of chemical bonding, improves its stability and repeat usage, using ether functionalization imidazol ion liquid
In body, the electrostatic force distribution of ether and imidazole ring is formed to so2Molecule absorption effect avtive spot, increased after load from
Sub- liquid adsorption so2Active sites, improve to so2Adsorption effect, simultaneously as the addition of carrier, using the duct of carrier
Structure, increased so2The specific surface area contacting between gas and ionic liquid, greatly improves its industrial applicability.
As the restriction to aforesaid way, the mass ratio of described carrier x and functionalized ion liquid [r1mim] r2 is 1:
0.1～0.5.
As the restriction to aforesaid way, n=1 or 2 or 3 in described r1.
The mass ratio of carrier and functionalized ion liquid is defined, makes combination effect between the two reach optimum, with
Obtain the load-type ion liquid of commercial Application better economy；Because of the interaction between functionalization imidazole ion liquid and carrier
Impact, limits ether as short chain ether structure.
Meanwhile, the present invention for absorbing so2The preparation method of the load-type ion liquid of gas, comprises the following steps:
A, synthetic intermediate [r1mim] [oh]: by [r1mim] [ch3so3] stir at 10 ~ 30 DEG C with anion exchange resin
Mix reaction 30 ~ 90min, sucking filtration, distilled water wash, revolving obtains the aqueous solution of intermediate [r1mim] [oh]；
B, synthetic intermediate [r1mim] r2: the aqueous solution that step a is obtained is added drop-wise in the aqueous solution of r2, at 0 ~ 30 DEG C
Lower stirring reaction 12 ~ 48h, revolving, with organic solvent washing, sucking filtration, then revolving, finally it is vacuum dried, obtain intermediate
[r1mim] r2, obtains the solution of intermediate [r1mim] r2 using solvent dissolving；
C, synthetic product [r1mim] [x-r2]: under inert gas shielding, carrier x is carried out chloride process first, then
With the solution mixing of intermediate [r1mim] r2, at 0 ~ 50 DEG C, react 12 ~ 24h, sucking filtration, surname extraction, prepared support type ionic liquid
Body [r1mim] r2-x.
The preparation of this load-type ion liquid is completed by three steps, with [r1mim] [ch3so3] as raw material, first with
Anion exchange resin is obtained intermediate [r1mim] [oh], to provide the material that can be reacted with subsequent amino-acid, then passes through
The neutralization reaction of strong base weak acid forms functionalized ion liquid [r1mim] r2 as intermediate with aminoacid, due to aminoacid
The presence of anion r2, finally successfully can be loaded with the carrier x processing through chloride, obtain the support type of the present invention from
Sub- liquid.
As the restriction to aforesaid way, in described step a, anion exchange resin is strongly basic anionic resin, often
0.01mol[r1mim][ch3so3] need 50 ~ 100 ml resin.
As the restriction to aforesaid way, in described step b, organic solvent is the mixed solution of methanol and acetonitrile, methanol with
Acetonitrile volume ratio is 1:5 ~ 10；The solvent of described dissolving intermediate [r1mim] r2 is distilled water or dehydrated alcohol.
As the restriction to aforesaid way, the method that in described step c, carrier x carries out chloride process is with volume ratio 1:
1 acetone, alcohol mixed solution soak, sucking filtration, and distilled water boils 2 ~ 8h, sucking filtration, vacuum drying, then with thionyl chloride or oxalyl
Chlorine is by its chloride.
In sum, using technical scheme, obtain for absorbing so2The load-type ion liquid knot of gas
Close the two-fold advantage of ether functionalized ion liquid and porous material, using the effect between carrier and ionic liquid and carrier
The good absorption performance of pore passage structure and ionic liquid, overcomes so2Absorption process intermediate ion liquid viscosity itself is larger, cost
Height, haves such problems as in sweetening process that gas-liquid mass transfer resistance is big, application cost is high, greatly improves to so2Adsorption effect；By
In the present invention support type functionalized ion liquid be chemical bonding mode, it is to avoid in the stream of application process intermediate ion liquid
Lose, be more beneficial for regeneration and the recycling of adsorbent, and greatly reduce the consumption of ionic liquid, reduce cost, work
Industry application aspect has more advantage.
Specific embodiment
Embodiment one
The present embodiment relates to absorb so2The preparation of the load-type ion liquid of gas, reactional equation is as follows:
Embodiment 1.1
It is carrier that the present embodiment is related to from activated carbon fiber (acf), and glycine is anion source for absorbing so2
The preparation method of the load-type ion liquid of gas, comprises the following steps:
A, first in flask add 0.01mol ionic liquid [c3o1mim][ch3so3] and 50ml resin, 20 DEG C are carried out
Stirring 0.5h.Then sucking filtration, washing, revolving, obtain [c3o1Mim] [oh] solution；
B, by [c3o1Mim] solution of [oh] is added dropwise in 0.013mol glycine solution, stirs 12h under room temperature,
Then the acetonitrile-methanol mixed solution that revolving is 9:1 with volume ratio washs, sucking filtration, and revolving obtains functionalized ion liquid
[c3o1mim][ch2nh2coo]；
C, by acf volume ratio be 1:1 acetone, alcohol mixed solution soak, sucking filtration, distilled water boils 4h, sucking filtration, very
Sky is dried to obtain acf-cooh, then with thionyl chloride in backflow stirred under nitrogen atmosphere 24h, sucking filtration, vacuum drying, obtains acf-
Cocl, takes acf-cocl and [c3o1mim][ch2nh2Coo] mass ratio 1:0.3,20 DEG C of reaction 14h, generate under nitrogen protection
Load-type ion liquid [c3o1mim][acf-conh-ch2Coo], surname extraction, put in vacuum drying oven.
Support type functionalized ion liquid [the c that will be obtained3o1mim][acf-conh-ch2Coo] it is placed in u-shaped pipe,
so2/n2Mixed gas are passed through u-shaped pipe, and temperature is 20 DEG C, monitors the concentration of tail gas with flue gas analyzer, until analyser reading
Basicly stable, you can to stop absorption, record so2Adsorbance is 100mg so2/g.
Embodiment 1.2
It is carrier that the present embodiment is related to from activated carbon (ac), and glycine is anion source for absorbing so2Gas
Load-type ion liquid preparation method, comprise the following steps:
A, first in flask add 0.01mol ionic liquid [c5o2mim][ch3so3] and 55ml resin, 25 DEG C are carried out
Stirring 0.5h.Then sucking filtration, washing, revolving, obtain [c5o2Mim] [oh] solution；
B, by [c5o2Mim] solution of [oh] is added dropwise in 0.015mol glycine solution, stirs 14h under room temperature,
Then the acetonitrile-methanol mixed solution that revolving is 8:1 with volume ratio washs, sucking filtration, and revolving obtains functionalized ion liquid
[c5o2mim][ch2nh2coo]；
C, by ac volume ratio be 1:1 acetone, alcohol mixed solution soak, sucking filtration, distilled water boils 2h, sucking filtration, very
Sky is dried to obtain ac-cooh, then with thionyl chloride in backflow stirred under nitrogen atmosphere 24h, sucking filtration, vacuum drying, obtains ac-
Cocl, takes ac-cocl and [c5o2mim][ch2nh2Coo] mass ratio 1:0.2,25 DEG C of reaction 16h under nitrogen protection, generate negative
Load type ionic liquid [c5o2mim][ac-conh-ch2Coo], surname extraction, put in vacuum drying oven.
Support type functionalized ion liquid [the c that will be obtained5o2mim][ac-conh-ch2Coo] it is placed in u-shaped pipe, so2/
n2Mixed gas are passed through u-shaped pipe, and temperature is 20 DEG C, monitors the concentration of tail gas with flue gas analyzer, until analyser reading base
This is stable, you can stops absorption, records so2Adsorbance is 150mg so2/g.
Embodiment 1.3
It is carrier that the present embodiment is related to from activated carbon fiber (acf), and alanine is anion source for absorbing so2
The preparation method of the load-type ion liquid of gas, comprises the following steps:
A, first in flask add 0.01mol ionic liquid [c5o2mim][ch3so3] be stirred with 50ml resin,
Shi Changwei 0.5h, then sucking filtration, washing, revolving, obtain [c5o2Mim] [oh] solution；
B, by [c5o2Mim] solution of [oh] is added dropwise in 0.014mol alanine aqueous solution, stirs 12h under room temperature,
Then the acetonitrile-methanol mixed solution that revolving is 7:1 with volume ratio washs, sucking filtration, and revolving obtains functionalized ion liquid
[c5o2mim][ch2ch2nh2coo]；
C, by acf-cooh and thionyl chloride in backflow stirred under nitrogen atmosphere 24h, sucking filtration, vacuum drying, obtain acf-
Cocl, acf-cocl and [c5o2mim][ch2ch2nh2Coo] react under conditions of nitrogen protection, generate load-type ion liquid
[c5o2mim][acf-conh-ch2ch2Coo], surname extraction, put in vacuum drying oven.
Support type functionalized ion liquid [the c that will be obtained5o2mim][acf-conh-ch2ch2Coo] it is placed in u-shaped pipe,
so2/n2Mixed gas are passed through u-shaped pipe, and temperature is 20 DEG C, monitors the concentration of tail gas with flue gas analyzer, until analyser reading
Basicly stable, you can to stop absorption, record so2Adsorbance is 200mg so2/g.
Embodiment 1.4
It is carrier that the present embodiment is related to from activated carbon (ac), and alanine is anion source for absorbing so2Gas
Load-type ion liquid preparation method, comprise the following steps:
A, first in flask add 0.01mol ionic liquid [c7o3mim][ch3so3] be stirred with 50ml resin,
Shi Changwei 40min, then sucking filtration, washing, revolving, obtain [c7o3Mim] [oh] solution；
B, by [c7o3Mim] solution of [oh] is added dropwise in 0.011mol alanine aqueous solution, stirs 12h under room temperature,
Then the acetonitrile-methanol mixed solution that revolving is 5:1 with volume ratio washs, sucking filtration, and revolving obtains functionalized ion liquid
[c7o3mim][ch2ch2nh2coo]；
C, by ac-cooh and thionyl chloride in backflow stirred under nitrogen atmosphere 24h, sucking filtration, vacuum drying, obtain ac-
Cocl, ac-cocl and [c7o3mim][ch2ch2nh2Coo] react under conditions of nitrogen protection, generate load-type ion liquid
[c7o3mim][ac-conh-ch2ch2Coo], surname extraction, put in vacuum drying oven.
Support type functionalized ion liquid [the c that will be obtained7o3mim][ac-conh-ch2ch2Coo] it is placed in u-shaped pipe,
so2/n2Mixed gas are passed through u-shaped pipe, and temperature is 20 DEG C, monitors the concentration of tail gas with flue gas analyzer, until analyser reading
Basicly stable, you can to stop absorption, record so2Adsorbance is 340mg so2/g.
Embodiment two
The present embodiment is related to support type functionalized ion liquid [c7o3mim][acf-conh-ch2ch2Coo] with unsupported
Acf desulfurization performance comparison.
Support type functionalized ion liquid [the c being obtained respectively7o3mim][acf-conh-ch2ch2Coo] and unsupported
Acf be placed in two u-shaped pipes, so2/n2Mixed gas are passed through u-shaped pipe, and temperature is 20 DEG C, monitors tail gas with flue gas analyzer
Concentration, until analyser reading is basicly stable, you can stop absorption, record so of unsupported acf2Adsorbance is 30mg
so2/ g, load-type ion liquid [c7o3mim][acf-conh-ch2ch2Coo] adsorbance be 340mg so2/ g, support type
Ionic liquid is 11 times of acf.
Embodiment three
The present embodiment is related to support type functionalized ion liquid [c7o3mim][ac-conh-ch2ch2Coo] recycle
Performance.
Test through 5 adsorption-desorptions, adsorbance is constant, and experimental result is as follows:
The load-type ion liquid of the present invention has good recycling performance.
Claims (6)
1. one kind is used for absorbing so2The preparation method of the load-type ion liquid of gas it is characterised in that: this support type ionic liquid
Body is [r1mim] r2-x, and wherein mim is Methylimidazole.；R1 is ch3(och2ch2)n ；R2 is 20 kinds of common amino acids
A kind of；Carrier x is activated carbon or NACF；The preparation method of this load-type ion liquid comprises the following steps:
A, synthetic intermediate [r1mim] [oh]: by [r1mim] [ch3so3] stir at 10 ~ 30 DEG C with anion exchange resin
Reaction 30 ~ 90min, sucking filtration, distilled water wash, revolving obtains the aqueous solution of intermediate [r1mim] [oh]；
B, synthetic intermediate [r1mim] r2: the aqueous solution that step a is obtained is added drop-wise in the aqueous solution of r2, at 0 ~ 30 DEG C
Stirring reaction 12 ~ 48h, revolving, with organic solvent washing, sucking filtration, then revolving, finally it is vacuum dried, obtain intermediate [r1mim]
R2, obtains the solution of intermediate [r1mim] r2 using solvent dissolving；
C, synthetic product [r1mim] [x-r2]: under inert gas shielding, carrier x is carried out chloride process first, then and
The solution mixing of intermediate [r1mim] r2, reacts 12 ~ 24h, sucking filtration, surname extraction, prepared support type ionic liquid at 0 ~ 50 DEG C
Body [r1mim] r2-x.
2. according to claim 1 for absorbing so2The preparation method of the load-type ion liquid of gas, its feature exists
In: the mass ratio of described carrier x and functionalized ion liquid [r1mim] r2 is 1: 0.1～0.5.
3. according to claim 1 for absorbing so2The preparation method of the load-type ion liquid of gas, its feature exists
In: n=1 or 2 or 3 in described r1.
4. according to claim 1 for absorbing so2The preparation method of the load-type ion liquid of gas, its feature exists
In: in step a, anion exchange resin is strongly basic anionic resin, every 0.01mol [r1mim] [ch3so3] need 50 ~
The resin of 100ml.
5. according to claim 1 for absorbing so2The preparation method of the load-type ion liquid of gas, its feature exists
In: organic solvent described in step b is the mixed solution of methanol and acetonitrile, and methanol and acetonitrile volume ratio are 1:5 ~ 10；Described
The solvent of dissolving intermediate [r1mim] r2 is distilled water or dehydrated alcohol.
6. according to claim 1 for absorbing so2The preparation method of the load-type ion liquid of gas, its feature exists
In: the method that in step c, carrier x carries out chloride process is to be soaked with the acetone of volume ratio 1:1, alcohol mixed solution, takes out
Filter, distilled water boils 2 ~ 8h, sucking filtration, vacuum drying, then with thionyl chloride or oxalyl chloride by its chloride.
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| CN104759258B (en) * | 2015-03-23 | 2017-03-08 | 济南大学 | The preparation of bromination 1 butyl 3 Methylimidazole. modified carbon fiber adsorbent |
| CN105498452B (en) * | 2015-11-25 | 2018-02-06 | 河北科技大学 | For absorbing SO2Double imidazole ion liquids of support type ether and preparation method thereof and application method |
| CN105503732B (en) * | 2015-11-25 | 2018-08-10 | 河北科技大学 | For absorbing SO2Double imidazole ion liquids of ether and preparation method thereof and application method |
| CN110064365B (en) * | 2019-04-18 | 2022-02-11 | 河北科技大学 | Application of ionic liquid in preparation of modified activated carbon, modified activated carbon and preparation method thereof |
| CN111186932B (en) * | 2019-12-30 | 2022-11-29 | 安徽得奇环保科技股份有限公司 | Treatment method of nickel-containing wastewater |
| CN113070039B (en) * | 2021-04-22 | 2023-03-24 | 浙江工业大学 | Adsorbing material for removing organic sulfur in coke oven gas and application thereof |
| CN113648788A (en) * | 2021-07-27 | 2021-11-16 | 南京工业大学 | Nano material with high-density ionic liquid on surface |
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| 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 |
| US20080153697A1 (en) * | 2006-12-22 | 2008-06-26 | E. I. Dupont De Nemours And Company | Mixtures of ammonia and ionic liquids |
| 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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