CN108452777A - A kind of macroreticular resin method of modifying for adsorbing low-concentration sulfur dioxide in air - Google Patents
A kind of macroreticular resin method of modifying for adsorbing low-concentration sulfur dioxide in air Download PDFInfo
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- CN108452777A CN108452777A CN201810017744.2A CN201810017744A CN108452777A CN 108452777 A CN108452777 A CN 108452777A CN 201810017744 A CN201810017744 A CN 201810017744A CN 108452777 A CN108452777 A CN 108452777A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
- B01J20/26—Synthetic macromolecular compounds
- B01J20/265—Synthetic macromolecular compounds modified or post-treated polymers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/508—Sulfur oxides by treating the gases with solids
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/80—Organic bases or salts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/06—Polluted air
Abstract
The present invention relates to a kind of macroreticular resin method of modifying for adsorbing low-concentration sulfur dioxide in air, and macroporous polystyrene type resin is fully swollen in three-neck flask with dichloroethanes.Dimethoxym ethane solution is added in another three-neck flask, then thionyl chloride solution is added dropwise thereto, so that its reaction is generated chloromethyl ether, reaction mixture is all poured into the three-neck flask equipped with resin.Anhydrous zinc chloride powder is added into the three-neck flask equipped with resin as catalyst, fully reacts, cooling, filtering, extracting obtains chloromethyl resin.Chloromethyl resin is added in organic solvent and binary trimethylamine again, fully reacts under stirring, then cools down, filters, finally obtains required aminated resin with acetone extraction.This method uses indirect chloromethylation, greatly reduces the risk that operating personnel contact chloromethyl ether, and the chloromethylation effect stability of resin.Aminated reagent is that more fully trimethylamine is reacted with sulfur dioxide molecule, substantially increases adsorption capacity of the resin to low-concentration sulfur dioxide.
Description
Technical field
The invention belongs to air cleaning and environment-friendly developing material fields, and in particular to one kind is for adsorbing low concentration two in air
The macroreticular resin method of modifying of sulfur oxide.
Background technology
Sulfur dioxide is one of the major pollutants in air as a kind of sour gas, it can form acid rain, is caused
Haze causes huge threat to the living environment of the mankind and animals and plants.Meanwhile the sulfur dioxide in air is existing for water
Under the conditions of can also accelerate the corrosion of the metal electrons element such as circuit board, influence the normal production run of certain industries.Although in cigarette
With the help of desulfurization device, the discharge of SO 2 from fume can be effectively reduced, but its removal efficiency can not reach
Absolutely, it still has in a small amount of sulfur dioxide (SO2) emissions to air.Due to China's large-scale use in the past few decades
Fossil fuel provides the production and living the required energy, and smoke discharge amount is huge, therefore causes in the whole country especially
The concentration of sulfur dioxide in urban air（30-100 μg/m3）Generally higher than international average is horizontal（5-15 μg/m3）[1], so
How to remove the sulfur dioxide of low concentration in air is an environmental problem for being badly in need of solution.
Absorption method is a kind of method that can effectively remove pollutants in air, has been widely applied to gas separation and net
Change field.The field of purification of sulfur dioxide in removing air is inhaled compared with traditional Limestone-gypsum Wet Flue Gas Desulfurization Process technology
Attached method has the advantages that low energy consumption, non-secondary pollution, material repeats utilization.Porous material due to its huge specific surface area and
Abundant pore structure is most suitable sorbing material.Currently used porous material such as activated carbon, activated carbon fibre are mesoporous
Silicon materials, molecular sieve etc. have sulfur dioxide different degrees of adsorption effect, but these basic materials are only in aperture point
It has a clear superiority on cloth, the control of pore size homogeneity, weak intermolecular interaction is relied primarily in adsorption gas molecule
Power（Such as Van der Waals force）, so it is to the purging sulfur dioxide effect of low concentration and bad [2].
It is an excellent method for improving porous material absorption performance that Surface chemical functional group of wood, which is modified,.In porous material hole
Method of the surface of gap by impregnating or being grafted, introduces different chemical functional groups, makes it that chemistry occur with by binding molecule
Reaction especially when adsorbed material concentration is relatively low, still has more to greatly improve the absorption property of porous material
Objective adsorbance.Absorption for sulfur dioxide, common method of modifying be to porous material pore surface introduce primary amine or
Secondary amine group improves the adsorption capacity to sulfur dioxide using the reaction mechanism of acid-base neutralization, but in dry or humidity
Under the conditions of lower, due to the shortage of water in air so that the effect is unsatisfactory for the adsorption mechanism, therefore the present invention proposes one
Kind is grafted the method for modifying of tertiary amine group to macroreticular resin pore surface, is shared using between tertiary amine group and sulfur dioxide molecule
The reaction mechanism of electronics pair improves the adsorption capacity to sulfur dioxide, make its also have to sulfur dioxide in dry conditions compared with
Good adsorption effect achievees the purpose that remove low-concentration sulfur dioxide in air with this.
[1].Klimont, Z., Smith, S. J., and Cofala, J. (2013). The last decade
of global anthropogenic sulfur dioxide: 2000–2011 emissions. Environmental
Research Letters, 8(1), 014003.
[2].Deng, H., Yi, H., Tang, X., Yu, Q., Ning, P., and Yang, L. (2012).
Adsorption equilibrium for sulfur dioxide, nitric oxide, carbon dioxide,
nitrogen on 13X and 5A zeolites. Chemical Engineering Journal, 188: 77-85。
Invention content
The invention discloses a kind of resin modified method for adsorbing low-concentration sulfur dioxide in air, this method is overall
On be divided into the chloromethylation of resin and aminated modification.Wherein the chloromethylation of resin is using to health
The smaller indirect chloromethylation of harm, aminated organic amine used are binary trimethylamine, to reach negative in resin table
The purpose for carrying tertiary amine group, to improve its adsorption effect to low-concentration sulfur dioxide in air.
The present invention to achieve the above objectives, is adopted the technical scheme that：
A kind of resin modified method for adsorbing low-concentration sulfur dioxide in air includes the following steps：
（1）：It is first that resin ultrapure water is clean, it is put into first equipped with thermometer, blender and reflux condensing tube
In three-neck flask, dichloroethane solution, which is added, makes it fully be swollen, and the mass ratio of resin and dichloroethanes is 1 ~ 3:20；
（2）：Dimethoxym ethane solution is added into second three-neck flask equipped with thermometer, dropping funel and reflux condensing tube, so
Thionyl chloride solution is slowly added dropwise thereto afterwards, obtained reaction mixture is all poured into step after being added dropwise to complete（1）
In fill in the three-neck flask of resin, the mass ratio of resin and dimethoxym ethane is 1 ~ 3:10, the mass ratio of dimethoxym ethane and thionyl chloride
It is 1 ~ 1.2:1；
（3）：Anhydrous zinc chloride powder is added into the three-neck flask for fill resin as catalyst, under stirring fully instead
It answers, postcooling is completed in reaction, filtering, by resin with acetone extraction 10 hours in Soxhlet extractor, then dry 3 at 60 DEG C
Hour, chloromethylation resin is obtained, the wherein mass ratio of resin and anhydrous zinc chloride is 1 ~ 3:1；
（4）：Chloromethylation resin is put into the third three-neck flask equipped with thermometer, blender and reflux condensing tube
In, organic solution is added as reaction dissolvent, is first fully swollen chloromethylation resin, chloromethyl resin and organic solution
Mass ratio be 1 ~ 1.5:40；
（5）：To step（4）Third three-neck flask in be added binary trimethylamine, fully reacted under stirring, react
Complete postcooling, filtering is then dry 3 small at 60 DEG C by gained resin with acetone extraction 10 hours in Soxhlet extractor
When, aminated modified resin is obtained, the mass ratio of wherein chloromethylation resin and binary trimethylamine is 1 ~ 2:10.
In the present invention, step（1）Described in swelling temperature be 30 ~ 35 DEG C, swelling time be 12 ~ 14 hours.
In the present invention, step（2）Described in be added dropwise thionyl chloride speed be 2 ~ 4 mL/ minutes, temperature maintains 40 ~ 45
℃。
In the present invention, step（3）Described in agitator speed be 300 ~ 400 rpm, the reaction time be 10 ~ 12 hours, temperature
Degree maintains 40 ~ 45 DEG C.
In the present invention, step（4）In be used as reaction dissolvent organic solution be N,N-dimethylformamide.
In the present invention, step（4）Described in swelling temperature be 25 ~ 35 DEG C, swelling time be 14 ~ 16 hours.
In the present invention, step（5）Described in binary trimethylamine be tetramethylethylenediamine or Isosorbide-5-Nitrae-lupetazin, stir
It is 400 ~ 450 rpm to mix device rotating speed, and the reaction time is 12 ~ 14 hours, and temperature maintains 80 ~ 85 DEG C.
The beneficial effects of the present invention are：
The present invention relates to a kind of for adsorbing the resin modified method of low-concentration sulfur dioxide in air, and is commonly used
The aminated method of modifying of porous material is compared, it is advantageous that：
（1）In method of modifying of the present invention, chloromethylation step is and traditional straight using indirect chloromethylation
It connects and is compared using the method for chloromethyl ether, time and concentration that operating personnel touch chloromethyl ether can be greatly reduced, effectively
Chloromethyl ether is avoided to endanger human carcinogen.Meanwhile this method also ensures the stability of resin chloromethylation effect, makes resin
Chlorinity is maintained in the range of 2.2 ~ 2.3mmol/g.
（2）In method of modifying of the present invention, aminated step operation is simple, and reaction condition is easier to reach.
（3）In method of modifying of the present invention, selected organic amine be two kinds of binary trimethylamines, according to us it
Preceding correlative study finds tertiary amine group compared to primary amine and secondary amine group, it is easier to it reacts with sulfur dioxide, therefore this
Aminated modified resin is more excellent compared to other materials to the adsorption effect of sulfur dioxide obtained by invention.
Description of the drawings
Fig. 1 is resin modified flow chart involved in the present invention.
Fig. 2 is resin modified reaction mechanism figure involved in the present invention.
Specific implementation mode
Embodiment 1
Taking the polystyrene type D101 macroporous absorbent resins that 20 g are bought, grain size is 0.3 ~ 1.25 mm, specific surface area is 550 ~
600 m2/ g, 9 ~ 10 nm of average pore size are fully cleaned up with ultra-pure water.The pretreated resin 15g of above-mentioned process is taken to be put into dress
There is a thermometer, in the three-neck flask of reflux condensing tube, 100 g dichloroethane solutions are added in blender, molten under the conditions of 30 DEG C
Swollen 12 hours.Thermometer is housed to another, it is molten that 50 g dimethoxym ethanes are added in the three-neck flask of reflux condensing tube in dropping funel
Liquid, it is 40 DEG C to keep temperature, and 50 g thionyl chloride solution are slowly added dropwise thereto, and rate of addition is 3 mL/ minutes, is dripped
Obtained reaction mixture is all poured into the three-neck flask for filling resin after.Then it is burnt to three necks for filling resin
5 g anhydrous zinc chlorides powder are added in bottle and are used as catalyst, it is abundant in the state that 40 DEG C and rotating speed are the stirring of 300 rpm
Postcooling is completed in reaction 10 hours, reaction, filtering, by resin with acetone extraction 10 hours in Soxhlet extractor, then 60
It is 3 hours dry at DEG C, obtain chloromethylation resin.The above-mentioned chloromethyl resins of 2 g are taken to be put into equipped with thermometer, stirring
In the three-neck flask of reflux condensing tube, the n,N-Dimethylformamide solution of 80 g is added as reaction dissolvent, 30 DEG C of items in device
Swellable resins 14 hours under part.The tetramethylethylenediamine of 20 g is added thereto again, is stirring for 400 rpm in 80 DEG C and rotating speed
It mixes and is fully reacted under state 12 hours, postcooling is completed in reaction, and filtering is small with acetone extraction 10 in Soxhlet extractor by resin
When, it is then 3 hours dry at 60 DEG C, obtain aminated modified resin.
The aminated resin for taking 1 g to be modified through tetramethylethylenediamine, loading internal diameter are 0.7 cm, the organic glass of long 5 cm
In adsorption column, both ends stopper fixation with mineral wool.Adsorption column upstream connects the sulfur dioxide calibrating gas of a concentration of 40 ppm, gas
Body flow control is 400 mL/ minutes, and adsorption temp control is 25 DEG C.One flue gas analyzer of adsorption column downstream connection, can be real-time
The concentration of sulfur dioxide in on-line checking gas downstream.Adsorption column downstream sulfur dioxide concentration carries out integral and calculating to the time, can
To obtain adsorbance of the tetramethylethylenediamine modified resin to sulfur dioxide.Specific resin modified result and sulfur dioxide absorption are real
It tests and the results are shown in Table 1.
Embodiment 2
Taking the polystyrene type D101 macroporous absorbent resins that 20 g are bought, grain size is 0.3 ~ 1.25 mm, specific surface area is 550 ~
600 m2/ g, 9 ~ 10 nm of average pore size are fully cleaned up with ultra-pure water.The pretreated resin 15g of above-mentioned process is taken to be put into dress
There is a thermometer, in the three-neck flask of reflux condensing tube, 100 g dichloroethane solutions are added in blender, molten under the conditions of 30 DEG C
Swollen 12 hours.Thermometer is housed to another, it is molten that 50 g dimethoxym ethanes are added in the three-neck flask of reflux condensing tube in dropping funel
Liquid, it is 40 DEG C to keep temperature, and 50 g thionyl chloride solution are slowly added dropwise thereto, and rate of addition is 3 mL/ minutes, is dripped
Obtained reaction mixture is all poured into the three-neck flask for filling resin after.Then it is burnt to three necks for filling resin
5 g anhydrous zinc chlorides powder are added in bottle and are used as catalyst, it is abundant in the state that 40 DEG C and rotating speed are the stirring of 300 rpm
Postcooling is completed in reaction 10 hours, reaction, filtering, by resin with acetone extraction 10 hours in Soxhlet extractor, then 60
It is 3 hours dry at DEG C, obtain chloromethylation resin.The above-mentioned chloromethyl resins of 2 g are taken to be put into equipped with thermometer, stirring
In the three-neck flask of reflux condensing tube, the n,N-Dimethylformamide solution of 80 g is added as reaction dissolvent, 30 DEG C of items in device
Swellable resins 14 hours under part.Isosorbide-5-Nitrae-lupetazin of 20 g is added thereto again, is 400 rpm's in 80 DEG C and rotating speed
It is fully reacted under stirring 12 hours, postcooling is completed in reaction, and resin is used acetone extraction 10 by filtering in Soxhlet extractor
Hour, it is then 3 hours dry at 60 DEG C, obtain aminated modified resin.
The aminated resin for taking 1 g to be modified through Isosorbide-5-Nitrae-lupetazin, loading internal diameter are 0.7 cm, organic glass of long 5 cm
In glass adsorption column, both ends stopper fixation with mineral wool.Adsorption column upstream connects the sulfur dioxide calibrating gas of a concentration of 40 ppm,
Gas flow rate control is 400 mL/ minutes, and adsorption temp control is 25 DEG C.One flue gas analyzer of adsorption column downstream connection, can be real
When on-line checking gas downstream in sulfur dioxide concentration.Adsorption column downstream sulfur dioxide concentration carries out integral and calculating to the time,
It can obtain adsorbance of the 1,4- lupetazins modified resin to sulfur dioxide.Specific resin modified result and sulfur dioxide are inhaled
Attached experimental result is shown in Table 1.
Comparative example 1
Taking the polystyrene type D101 macroporous absorbent resins that 20 g are bought, grain size is 0.3 ~ 1.25 mm, specific surface area is 550 ~
600 m2/ g, 9 ~ 10 nm of average pore size are fully cleaned up with ultra-pure water.The pretreated resin 15g of above-mentioned process is taken to be put into dress
There is a thermometer, in the three-neck flask of reflux condensing tube, 100 g dichloroethane solutions are added in blender, molten under the conditions of 30 DEG C
Swollen 12 hours.Thermometer is housed to another, it is molten that 50 g dimethoxym ethanes are added in the three-neck flask of reflux condensing tube in dropping funel
Liquid, it is 40 DEG C to keep temperature, and 50 g thionyl chloride solution are slowly added dropwise thereto, and rate of addition is 3 mL/ minutes, is dripped
Obtained reaction mixture is all poured into the three-neck flask for filling resin after.Then it is burnt to three necks for filling resin
5 g anhydrous zinc chlorides powder are added in bottle and are used as catalyst, it is abundant in the state that 40 DEG C and rotating speed are the stirring of 300 rpm
Postcooling is completed in reaction 10 hours, reaction, filtering, by resin with acetone extraction 10 hours in Soxhlet extractor, then 60
It is 3 hours dry at DEG C, obtain chloromethylation resin.The above-mentioned chloromethyl resins of 2 g are taken to be put into equipped with thermometer, stirring
In the three-neck flask of reflux condensing tube, the n,N-Dimethylformamide solution of 80 g is added as reaction dissolvent, 30 DEG C of items in device
Swellable resins 14 hours under part.The ethylenediamine of 20 g is added thereto again, is the stirring of 400 rpm in 80 DEG C and rotating speed
Postcooling is completed in lower fully reaction 12 hours, reaction, filtering, by resin with acetone extraction 10 hours in Soxhlet extractor, so
It is 3 hours dry at 60 DEG C afterwards, obtain aminated modified resin.
The aminated resin for taking 1 g to be modified through ethylenediamine, loading internal diameter are 0.7 cm, the organic glass adsorption column of long 5 cm
In, both ends stopper fixation with mineral wool.Adsorption column upstream connects the sulfur dioxide calibrating gas of a concentration of 40 ppm, gas flow rate
Control is 400 mL/ minutes, and adsorption temp control is 25 DEG C.One flue gas analyzer of adsorption column downstream connection, can real-time online inspection
Survey the concentration of sulfur dioxide in gas downstream.Adsorption column downstream sulfur dioxide concentration carries out integral and calculating to the time, can obtain
Adsorbance of the ethylenediamine modified resin to sulfur dioxide.Specific resin modified result and sulfur dioxide Adsorption experimental results are shown in Table 1.
Comparative example 2
It is 0.7 cm to take the unmodified resins of 1 g, loading internal diameter, in the organic glass adsorption column of long 5 cm, both ends mineral wool
Stopper fixation.Adsorption column upstream connects the sulfur dioxide calibrating gas of a concentration of 40 ppm, and gas flow rate control is 400 mL/ points
Clock, adsorption temp control are 25 DEG C.One flue gas analyzer of adsorption column downstream connection, can real-time online detection gas downstream in dioxy
Change the concentration of sulphur.Adsorption column downstream sulfur dioxide concentration carries out integral and calculating to the time, can obtain unmodified resin to dioxy
Change the adsorbance of sulphur.Specific sulfur dioxide Adsorption experimental results are shown in Table 1.
1 different resins material characterization of table and sulfur dioxide absorption result
| Adsorbent | BET specific surface area (m2/g) | Nitrogen element content (%) | Sulfur dioxide time of break-through (min) | Sulfur dioxide saturation time (min) | Adsorbance (mmol/g) | |
| Embodiment 1 | Tetramethylethylenediamine modified resin | 427 | 7.68 | 211 | 337 | 6.23 |
| Embodiment 2 | 1,4- lupetazin modified resins | 369 | 7.23 | 186 | 303 | 5.98 |
| Comparative example 1 | Ethylenediamine modified resin | 454 | 7.44 | 130 | 245 | 3.66 |
| Comparative example 2 | Unmodified resin | 558 | 0.01 | 11 | 25 | 0.21 |
Note：5 % and 95 the % required time that adsorption column downstream sulfur dioxide concentration reaches upstream concentration are referred to as dioxy
Change sulphur time of break-through and saturation time.
Can significantly it be found out by table 1, the absorption by the modified resin of two kinds of binary trimethylamines to sulfur dioxide
Amount is far longer than unmodified resin, and the resin than being modified through ethylenediamine is high by 60 ~ 70%.It is known modified by ethylenediamine
The amine groups type that resin surface is grafted is primary amine and secondary amine, therefore illustrates two kinds of tertiary-amine modified trees involved in the present invention
Fat will be far superior to primary amine and secondary amine modified resin to the adsorption capacity of low-concentration sulfur dioxide.
Claims (7)
1. a kind of resin modified method for adsorbing low-concentration sulfur dioxide in air, it is characterised in that include the following steps：
（1）：It is first that resin ultrapure water is clean, it is put into first equipped with thermometer, blender and reflux condensing tube
In three-neck flask, dichloroethane solution, which is added, makes it fully be swollen, and the mass ratio of resin and dichloroethanes is 1 ~ 3:20；
（2）：Dimethoxym ethane solution is added into second three-neck flask equipped with thermometer, dropping funel and reflux condensing tube, so
Thionyl chloride solution is slowly added dropwise thereto afterwards, obtained reaction mixture is all poured into step after being added dropwise to complete（1）
In fill in the three-neck flask of resin, the mass ratio of resin and dimethoxym ethane is 1 ~ 3:10, the mass ratio of dimethoxym ethane and thionyl chloride
It is 1 ~ 1.2:1；
（3）：Anhydrous zinc chloride powder is added into the three-neck flask for fill resin as catalyst, under stirring fully instead
It answers, postcooling is completed in reaction, filtering, by resin with acetone extraction 10 hours in Soxhlet extractor, then dry 3 at 60 DEG C
Hour, chloromethylation resin is obtained, the wherein mass ratio of resin and anhydrous zinc chloride is 1 ~ 3:1；
（4）：Chloromethylation resin is put into the third three-neck flask equipped with thermometer, blender and reflux condensing tube
In, be added organic solution be used as reaction dissolvent, fully swelling chloromethylation resin, chloromethylation resin with it is organic molten
The mass ratio of liquid is 1 ~ 1.5:40；
（5）：To step（4）Third three-neck flask in be added binary trimethylamine, fully reacted under stirring, react
Complete postcooling, filtering is then dry 3 small at 60 DEG C by gained resin with acetone extraction 10 hours in Soxhlet extractor
When, aminated modified resin is obtained, the mass ratio of wherein chloromethylation resin and binary trimethylamine is 1 ~ 2:10.
2. a kind of resin modified method for adsorbing low-concentration sulfur dioxide in air according to claim 1, special
Sign is, step（1）Described in swelling temperature be 30 ~ 35 DEG C, swelling time be 12 ~ 14 hours.
3. a kind of resin modified method for adsorbing low-concentration sulfur dioxide in air according to claim 1, special
Sign is, step（2）Described in be added dropwise thionyl chloride speed be 2 ~ 4 mL/ minutes, temperature maintains 40 ~ 45 DEG C.
4. a kind of resin modified method for adsorbing low-concentration sulfur dioxide in air according to claim 1, special
Sign is, step（3）Described in agitator speed be 300 ~ 400 rpm, the reaction time is 10 ~ 12 hours, temperature maintains 40 ~
45℃。
5. a kind of resin modified method for adsorbing low-concentration sulfur dioxide in air according to claim 1, special
Sign is, step（4）In be used as reaction dissolvent organic solution be N,N-dimethylformamide.
6. a kind of resin modified method for adsorbing low-concentration sulfur dioxide in air according to claim 1, special
Sign is, step（4）Described in swelling temperature be 25 ~ 35 DEG C, swelling time be 14 ~ 16 hours.
7. a kind of resin modified method for adsorbing low-concentration sulfur dioxide in air according to claim 1, special
Sign is, step（5）Described in binary trimethylamine be that tetramethylethylenediamine or Isosorbide-5-Nitrae-lupetazin, agitator speed are
400 ~ 450 rpm, reaction time are 12 ~ 14 hours, and temperature maintains 80 ~ 85 DEG C.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111282555A (en) * | 2020-04-14 | 2020-06-16 | 西安正阳嘉禾化工科技有限公司 | Broad-spectrum hemoperfusion macroporous adsorption resin and preparation method thereof |
| CN113307438A (en) * | 2021-06-30 | 2021-08-27 | 赛恩斯环保股份有限公司 | Treatment method of nickel-cobalt smelting heavy metal wastewater |
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