CN108545765A - A method of Waste Acid From Hua Cheng Foil spent acid is prepared into aluminium polychloride and polyaluminium sulfate - Google Patents
A method of Waste Acid From Hua Cheng Foil spent acid is prepared into aluminium polychloride and polyaluminium sulfate Download PDFInfo
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- CN108545765A CN108545765A CN201810473034.0A CN201810473034A CN108545765A CN 108545765 A CN108545765 A CN 108545765A CN 201810473034 A CN201810473034 A CN 201810473034A CN 108545765 A CN108545765 A CN 108545765A
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/48—Halides, with or without other cations besides aluminium
- C01F7/56—Chlorides
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/68—Aluminium compounds containing sulfur
- C01F7/74—Sulfates
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
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Abstract
The present invention relates to a kind of methods that Waste Acid From Hua Cheng Foil spent acid is prepared into aluminium polychloride and polyaluminium sulfate, including following processing step：Waste Acid From Hua Cheng Foil waste acid liquor and absorbing liquid are each led into diffusion dialysis film, are recycled acid solution and acid waste water containing aluminium ion；Acid waste water containing aluminium ion is passed through NF membrane, obtains acidic aqueous solution and aluminium ion concentrate；Aluminium ion concentrate is passed through distillation film, obtains the high dope of aluminium ion and distilled water；The high dope of aluminium ion is prepared into aluminium system water treatment agent, i.e. aluminium polychloride and polyaluminium sulfate.The beneficial effects of the present invention are：90% acid recovery in Waste Acid From Hua Cheng Foil spent acid reduces subsequent treatment cost；And realize recycling.
Description
Technical field
The present invention relates to field of industrial waste water treatment, especially a kind of method of Waste Acid From Hua Cheng Foil waste acid resource.
Background technology
With domestic clean manufacturing require continuous improvement, according to《People's Republic of China's promotion law on cleaner production》Want
It asks, carries out in an all-round way clean manufacturing in China.Maximum one of the problem that clean manufacturing faces is the discharge of a large amount of acid waste liquid,
These waste liquids are related to numerous national economy major fields such as China's steel and iron industry, metallurgy, electronics, rare earth.It is with Waste Acid From Hua Cheng Foil industry
Example, a medium-sized low-field electrode foil manufacturing enterprise, (main component is sulphur to about tens tons of the spent acid of generation 25% -30% daily
Acid, hydrochloric acid, nitric acid), the processing for being directed to this kind of acid waste liquid at present mainly has lime neutralization, evaporative crystallization and diffusive dialysis method.
There is prodigious drawback in first two method, lime neutralizes not only waste of resource but also the waste residue of generation still pollutes environment；And it steams
It is power that hair crystallization, which needs heat source, and operating cost is very high, and general enterprises are difficult to bear；Though there is Some Enterprises to use diffusion dialysis
Acid in Recycling of waste liquid, but the equivalent raffinate generated still uses neutralisation treatment, waste of resource, while environment is also resulted in secondary
Pollution.The presence of these problems seriously hinders the sustainable development and scientific and technological progress of relevant industries, to the existence ring of the mankind
Border constitutes serious threat.Therefore there is an urgent need for a kind of method of resource, handle the spent acid of the sector, according to clean manufacturing
Requirement, thoroughly realize waste acid resource.
Invention content
The present invention be directed to many defects present in background technology, solve by following technical solution.
A method of Waste Acid From Hua Cheng Foil spent acid is prepared into aluminium polychloride and polyaluminium sulfate, is included the following steps：
Step 1, Waste Acid From Hua Cheng Foil waste acid liquor and absorbing liquid are each led into diffusion dialysis film, be recycled acid solution and containing aluminium from
Sub- acid waste water；
Step 2, the acid waste water containing aluminium ion in step 1 is passed through NF membrane, obtains acidic aqueous solution and aluminium ion is dense
Contracting liquid；
Step 3, the aluminium ion concentrate in step 2 is passed through distillation film, obtains the high dope of aluminium ion and distilled water；
Step 4, the high dope of aluminium ion in step 3 is prepared into aluminium system water treatment agent, i.e. aluminium polychloride or polymerization
Aluminum sulfate：
Prepare aluminium polychloride：
It takes the high dope of the aluminium ion of 100~160 parts by weight in container, being heated to 80~95 DEG C, adds under stirring
The calcium aluminate powder for entering 6~12 parts by weight is then heated to 100~108 DEG C, continues to be stirred to react 60~180 minutes, then cool down
To after 80~90 DEG C, colourless or flaxen polymeric aluminum chlorides solution is finally obtained by filtration；
Prepare polyaluminium sulfate：
It takes the high dope of the aluminium ion of 80~120 parts by weight in container, in the state of stirring, 7~10 weight is first added
The aluminium hydrate powder of part, is then slowly added into the industrial sulphuric acid of 2~5 parts by weight, then continues to be heated to 100~105 DEG C, continue
It is stirred to react 30~80 minutes, after being finally cooled to 80~90 DEG C, colourless or flaxen polyaluminum sulfate aluminum solutions is obtained by filtration.
Further, the Waste Acid From Hua Cheng Foil spent acid is the waste hydrochloric acid or Waste Sulfuric Acid generated in corrosion process, aluminium in step 1
Ion concentration is 0.25~0.6mol/L.
Further, the operating condition of the NF membrane nanofiltration in step 2 is：40~70bar of pressure, membrane flux are 5~8L/
(m2·h)；Aluminium ion concentration is 0.5~1.0mol/L in the aluminium ion concentrate.
Further, the distillation film in step 3 is used but is not limited to using steam as the behaviour of the low temperature direct contact type of heat source
Make mode；Aluminium ion concentration is 1.0~1.5mol/L in the high dope of the aluminium ion.
Further, the distillation film in step 3, using but be not limited to the acidproof material of PTFE.
Further, the diffusion dialysis in step 1, the membrane distillation in the nanofiltration and step 3 in step 2 may be used but not
It is limited to use level-one membrane separating process.
Further, the high dope of aluminium ion in step 4 is respectively liquor alumini chloridi and aluminum sulfate solution.
To sum up, it the present invention provides a kind of method of Waste Acid From Hua Cheng Foil waste acid resource, realizes：90% in Waste Acid From Hua Cheng Foil spent acid
Acid recovery reduces subsequent treatment cost；Aluminium ion whole recycling in Waste Acid From Hua Cheng Foil spent acid, no waste discharge；Low energy consumption is transported
Row reduces by 50%~90% than existing evaporative crystallisation process energy consumption；Byproduct condensation aluminium chloride or polyaluminium sulfate purity are high, can
For drinking water field；The diluted acid isolated can be recycled with reuse to production line, realization, contamination-free discharge；Meet
The clean manufacturing requirement of Waste Acid From Hua Cheng Foil corrosion process, creates value for enterprise, has great dissemination.
Description of the drawings
Fig. 1 is the flow diagram of preparation method of the present invention.
Specific implementation mode
Below in conjunction with the embodiment of the present invention, technical scheme of the present invention is clearly and completely described, it is clear that institute
The embodiment of description is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention,
Every other embodiment obtained by those of ordinary skill in the art without making creative efforts, belongs to this hair
The range of bright protection.
As shown in Figure 1, a kind of method that Waste Acid From Hua Cheng Foil spent acid is prepared into aluminium polychloride and polyaluminium sulfate, including it is as follows
Step：
Step 1, Waste Acid From Hua Cheng Foil waste acid liquor and absorbing liquid are each led into diffusion dialysis film, be recycled acid solution and containing aluminium from
Sub- acid waste water；
Step 2, the acid waste water containing aluminium ion in step 1 is passed through NF membrane, obtains acidic aqueous solution and aluminium ion is dense
Contracting liquid；
Step 3, the aluminium ion concentrate in step 2 is passed through distillation film, obtains the high dope of aluminium ion and distilled water；
Step 4, the high dope of aluminium ion in step 3 is prepared into aluminium system water treatment agent, i.e. aluminium polychloride or polymerization
Aluminum sulfate：
Prepare aluminium polychloride：
It takes the high dope of the aluminium ion of 100~160 parts by weight in container, being heated to 80~95 DEG C, adds under stirring
The calcium aluminate powder for entering 6~12 parts by weight is then heated to 100~108 DEG C, continues to be stirred to react 60~180 minutes, then cool down
To after 80~90 DEG C, colourless or flaxen polymeric aluminum chlorides solution is finally obtained by filtration；
Prepare polyaluminium sulfate：
It takes the high dope of the aluminium ion of 80~120 parts by weight in container, in the state of stirring, 7~10 weight is first added
The aluminium hydrate powder of part, is then slowly added into the industrial sulphuric acid of 2~5 parts by weight, then continues to be heated to 100~105 DEG C, continue
It is stirred to react 30~80 minutes, after being finally cooled to 80~90 DEG C, colourless or flaxen polyaluminum sulfate aluminum solutions is obtained by filtration.
It is described by following multiple specific embodiments.
Specific embodiment one：
Waste Acid From Hua Cheng Foil waste hydrochloric acid 300t/d, concentration of hydrochloric acid 1.5mol/L, aluminium ion concentration 0.3mol/L.Absorbing liquid is using originally
Water, waste hydrochloric acid and tap water are with 1:1 flow is recycled acid and acid chlorization aluminum solutions by the both sides of diffusion dialysis film,
Concentration of hydrochloric acid 1.2mol/L in recovery acid, aluminium ion concentration 0.03mol/L, concentration of hydrochloric acid 0.3mol/L in liquor alumini chloridi, aluminium
Ion concentration 0.27mol/L.
Then acid chlorization aluminum solutions enter NF membrane, and liquor alumini chloridi is concentrated under about 40bar pressure, concentrate aluminium
Ion concentration reaches 0.54mol/L, concentration of hydrochloric acid 0.3mol/L, and penetrates the concentration of hydrochloric acid 0.3mol/L of NF membrane, containing a small amount of
Aluminium ion, concentration 0.049mol/L.
Then aluminium chloride concentrate enters distillation film, the aluminium chloride concentrate under the hot mass transfer effect of steam (70~80 DEG C)
Middle moisture evaporation enters condensation side through distillation film, forms acid distilled water, and concentration of hydrochloric acid 0.09mol/L is finally distilling
The concentration side of film obtains the high dope of aluminium chloride, and (equivalent aluminium oxide contains by aluminium ion concentration 1.5mol/L, concentration of hydrochloric acid 0.67mol/L
Amount is about 7.6%).Finally, the high dope of aluminium chloride is heated to 95 DEG C, and 6% calcium aluminate powder (Al is added under stirring2O3≧
50%) 105 DEG C, are then heated to, continues to be stirred to react 120 minutes, is subsequently cooled to 80~90 DEG C, be obtained by filtration colourless or light
The polymeric aluminum chlorides solution of yellow；
The hydrochloric acid solution that the recycling hydrochloric acid of diffusion dialysis process, nanofiltration penetrate contains a small amount of aluminium ion, is not influencing
To production line, the distilled water containing a small amount of hydrochloric acid that membrane distillation generates in the process can make diffusion dialysis for reuse under conditions of production
Absorbing liquid.Each workshop section's quantum of output variation of aluminium ion solution is as follows：
| Workshop section | Flow t/d |
| Stoste | 300.0 |
| Diffusion dialysis | 300.0 |
| Nanofiltration | 135.0 |
| Membrane distillation | 48.6 |
Operating cost and traditional triple effect negative pressure evaporation comparison under this new process operating mode is as follows：
Then have：
There is available 85 DEG C or so of hot water in general factory, therefore energy consumption operating cost is reduced compared to traditional handicraft
60.1~90.0%.
Product indices under this operating mode meet the standard of Drinking Water polyaluminium chloride national standard.Specific data are such as
Under：
Specific embodiment 2
Waste Acid From Hua Cheng Foil Waste Sulfuric Acid 300t/d, sulfuric acid concentration 3.0mol/L, aluminium ion concentration 0.4mol/L.Absorbing liquid is using originally
Water, Waste Sulfuric Acid and tap water are with 1:0.5 flow is recycled acid and aluminum sulfate is molten by the both sides of level-one diffusion dialysis film
Liquid, sulfuric acid concentration 3.0mol/L in recovery acid, aluminium ion concentration 0.04mol/L, sulfuric acid concentration 1.5mol/L in aluminum sulfate waste water,
Aluminium ion concentration 0.38mol/L.
Then two level diffusion dialysis absorbing liquid uses pure water, and aluminum sulfate waste water and pure water are with 1:1 flow is expanded by two level
The both sides for dissipating dialyser are recycled diluted acid and dilute sulfuric acid aluminum solutions, recycle sulfuric acid concentration 1.2mol/L in diluted acid, and aluminium ion is dense
0.038mol/L is spent, sulfuric acid concentration 0.3mol/L, aluminium ion concentration 0.34mol/L in aluminum sulfate waste water.
Level-one diffusion dialysis recovery acid and two level diffusion dialysis recycling diluted acid mixing after, sulfuric acid concentration 1.8mol/L, aluminium from
Sub- concentration 0.04mol/L.
Into NF membrane, aluminium ion concentration reaches 0.7mol/L in aluminium ion concentrate under about 60bar pressure, and sulfuric acid is dense
0.3mol/L is spent, and penetrates the sulfuric acid solution acid concentration 0.35mol/L of NF membrane, containing a small amount of aluminium ion, concentration 0.09mol/
L。
Then aluminum sulfate concentrate enters distillation film, the aluminum sulfate concentrate under the hot mass transfer effect of steam (70~80 DEG C)
Middle moisture evaporation enters condensation side through distillation film, forms distilled water, and it is highly concentrated finally to obtain aluminum sulfate in the concentration side of distillation film
Liquid, aluminium ion concentration 1.0mol/L, sulfuric acid concentration 0.43mol/L.(equivalent alumina content about 5.0%)
Finally, the high dope of aluminium ion enters reaction kettle, in the state of stirring, 6% aluminium hydrate powder is added, then slowly
Industrial sulphuric acid (98%) is added, mass concentration 2% continues to be heated to 105 DEG C, is stirred to react 30 minutes, is subsequently cooled to 80
~90 DEG C, colourless or flaxen polyaluminum sulfate aluminum solutions are obtained by filtration.
The sulfuric acid solution that the recycling sulfuric acid of diffusion dialysis process, nanofiltration penetrate contains a small amount of aluminium ion, is not influencing
Reuse is to production line under conditions of production.The distilled water that membrane distillation process generates can be used as pure water for diffusion dialysis absorbing liquid.
Each workshop section's quantum of output variation of aluminium ion solution is as follows：
| Workshop section | Flow t/d |
| Stoste | 300.0 |
| Level-one diffusion dialysis | 300.0 |
| Two level diffusion dialysis | 300.0 |
| Nanofiltration | 125.0 |
| Membrane distillation | 87.2 |
Energy consumption and traditional triple effect negative pressure evaporation comparison under this operating mode is as follows：
Then have：
There is available 85 DEG C or so of hot water in general factory, therefore energy consumption operating cost is reduced compared to traditional handicraft
73.1~88.3%.
Product indices under this operating mode meet professional standard (the no polyaluminium sulfate relevant criterion, therefore ginseng of aluminum sulfate
Examine the standard).Specific data are as follows：
Specific embodiment 3
Waste Acid From Hua Cheng Foil waste hydrochloric acid 100t/d, concentration of hydrochloric acid 2.0mol/L, aluminium ion concentration 0.5mol/L.Absorbing liquid is using pure
Water, waste hydrochloric acid and pure water are with 1:1 flow is recycled acid and liquor alumini chloridi, recovery acid by the both sides of diffusion dialysis film
Middle concentration of hydrochloric acid 1.6mol/L, aluminium ion concentration 0.05mol/L, concentration of hydrochloric acid 0.4mol/L in liquor alumini chloridi, aluminium ion are dense
Spend 0.35mol/L.
Then liquor alumini chloridi enters NF membrane, and liquor alumini chloridi is concentrated under about 50bar pressure, concentrate aluminium ion
Concentration reaches 0.7mol/L, concentration of hydrochloric acid 0.4mol/L, and penetrates the concentration of hydrochloric acid 0.4mol/L of NF membrane, containing a small amount of aluminium from
Son, concentration 0.06mol/L.
Then aluminium chloride concentrate enters distillation film, the aluminium chloride concentrate under the hot mass transfer effect of hot water (70~80 DEG C)
Middle moisture evaporation enters condensation side through distillation film, forms acid distilled water, and concentration of hydrochloric acid 0.19mol/L is finally distilling
The concentration side of film obtains the high dope of aluminium chloride, aluminium ion concentration 1.5mol/L, concentration of hydrochloric acid 0.43mol/L.(equivalent aluminium oxide contains
Amount is about 7.6%)
Finally, the high dope of aluminium chloride is heated to 95 DEG C after entering reaction kettle, and 8% calcium aluminate powder is added under stirring
(Al2O3≤ 50%), continue to be heated to 105 DEG C, be stirred to react 120 minutes, be subsequently cooled to 80~90 DEG C, be obtained by filtration colourless
Or flaxen polymeric aluminum chlorides solution；
The dilute hydrochloric acid solution that the recycling hydrochloric acid of diffusion dialysis process, nanofiltration penetrate contains a small amount of aluminium ion, in not shadow
To production line, the distilled water containing a small amount of hydrochloric acid that membrane distillation generates in the process can make diffusion and ooze for reuse under conditions of ringing production
Analyse absorbing liquid.
Each workshop section's quantum of output variation of aluminium ion solution is as follows：
| Workshop section | Flow t/d |
| Stoste | 100.0 |
| Diffusion dialysis | 100.0 |
| Nanofiltration | 45.0 |
| Membrane distillation | 21.0 |
Energy consumption and traditional triple effect negative pressure evaporation comparison under this operating mode is as follows：
Then have：
There is available 85 DEG C or so of hot water in general factory, therefore energy consumption operating cost is reduced compared to traditional handicraft
65.7~89.7%.
Product indices under this operating mode meet the standard of Drinking Water polyaluminium chloride national standard.Specific data are such as
Under：
Specific embodiment 4
Waste Acid From Hua Cheng Foil Waste Sulfuric Acid, sulfuric acid concentration 2.5mol/L, aluminium ion concentration 0.5mol/L.Absorbing liquid uses pure water, sulfuric acid
Aluminium waste water and pure water are with 1:0.8 flow is recycled acid and aluminum sulfate solution by the both sides of diffusion dialysis film, in recovery acid
Sulfuric acid concentration 2.7mol/L, aluminium ion concentration 0.06mol/L, sulfuric acid concentration 0.38mol/L in aluminum sulfate waste water, aluminium ion concentration
0.45mol/L。
Aluminum sulfate waste water enters NF membrane, and aluminium ion concentration reaches 0.6mol/ in aluminium ion concentrate under 50bar pressure
L, sulfuric acid concentration 0.38mol/L, and the sulfuric acid solution acid concentration 0.38mol/L of NF membrane is penetrated, containing a small amount of aluminium ion, concentration
0.19mol/L。
Then aluminum sulfate concentrate enters distillation film, the aluminum sulfate concentrate under the hot mass transfer effect of steam (70~80 DEG C)
Middle moisture evaporation enters condensation side through distillation film, forms distilled water, and it is highly concentrated finally to obtain aluminum sulfate in the concentration side of distillation film
Liquid, aluminium ion concentration 1.0mol/L, sulfuric acid concentration 0.63mol/L.(equivalent alumina content about 5.0%)
Finally, the high dope of aluminium ion is added 8% aluminium hydrate powder, is then slowly added into 2% in the state of stirring
Industrial sulphuric acid (98%), continuous heating are stirred to react 30 minutes to 105 DEG C, are subsequently cooled to 80~90 DEG C, be obtained by filtration colourless
Or flaxen polyaluminum sulfate aluminum solutions.
The sulfuric acid solution that the recycling sulfuric acid of diffusion dialysis process, nanofiltration penetrate contains a small amount of aluminium ion, is not influencing
Reuse is to production line under conditions of production.The distilled water that membrane distillation process generates can be used as pure water for diffusion dialysis absorbing liquid.
Each workshop section's quantum of output variation of aluminium ion solution is as follows：
| Workshop section | Flow t/d |
| Stoste | 200.0 |
| Diffusion dialysis | 200.0 |
| Nanofiltration | 127.5 |
| Membrane distillation | 76.5 |
Energy consumption and traditional triple effect negative pressure evaporation comparison under this operating mode is as follows：
Then have：
There is available 85 DEG C or so of hot water in general factory, therefore energy consumption operating cost is reduced compared to traditional handicraft
73.1~88.3%.
Product indices under this operating mode meet professional standard (the no polyaluminium sulfate relevant criterion, therefore ginseng of aluminum sulfate
Examine the standard).Specific data are as follows：
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
Understanding without departing from the principles and spirit of the present invention can carry out these embodiments a variety of variations, modification, replace
And modification, the scope of the present invention is defined by the appended.
Claims (7)
1. a kind of method that Waste Acid From Hua Cheng Foil spent acid is prepared into aluminium polychloride and polyaluminium sulfate, which is characterized in that including as follows
Step：
Step 1, Waste Acid From Hua Cheng Foil waste acid liquor and absorbing liquid are each led into diffusion dialysis film, is recycled acid solution and containing aluminium ion acid
Property waste water；
Step 2, the acid waste water containing aluminium ion in step 1 is passed through NF membrane, obtains acidic aqueous solution and aluminium ion concentrate；
Step 3, the aluminium ion concentrate in step 2 is passed through distillation film, obtains the high dope of aluminium ion and distilled water；
Step 4, the high dope of aluminium ion in step 3 is prepared into aluminium system water treatment agent, i.e. aluminium polychloride or polyaluminum sulfate
Aluminium：
Prepare aluminium polychloride：
The high dope of the aluminium ion of 100~160 parts by weight is taken in container, being heated to 80~95 DEG C, it is added 6 under stirring~
The calcium aluminate powder of 12 parts by weight is then heated to 100~108 DEG C, continues to be stirred to react 60~180 minutes, is subsequently cooled to 80
After~90 DEG C, colourless or flaxen polymeric aluminum chlorides solution is finally obtained by filtration；
Prepare polyaluminium sulfate：
It takes the high dope of the aluminium ion of 80~120 parts by weight in container, in the state of stirring, 7~10 parts by weight is first added
Aluminium hydrate powder is then slowly added into the industrial sulphuric acid of 2~5 parts by weight, then continues to be heated to 100~105 DEG C, continues to stir
Reaction 30~80 minutes, after being finally cooled to 80~90 DEG C, is obtained by filtration colourless or flaxen polyaluminum sulfate aluminum solutions.
2. according to the method described in claim 1, it is characterized in that, the Waste Acid From Hua Cheng Foil spent acid is corrosion process in step 1
The waste hydrochloric acid or Waste Sulfuric Acid of middle generation, aluminium composition are 0.25~0.6mol/L.
3. according to the method described in claim 1, it is characterized in that, the operating condition of the NF membrane nanofiltration in step 2 is：Pressure
40~70bar, membrane flux are 5~8L/ (m2·h)；Aluminium ion concentration is 0.5~1.0mol/ in the aluminium ion concentrate
L。
4. according to the method described in claim 1, it is characterized in that, distillation film in step 3, use but be not limited to be with steam
The mode of operation of the low temperature direct contact type of heat source；Aluminium ion concentration is 1.0~1.5mol/L in the high dope of the aluminium ion.
5. according to the method described in claim 1, it is characterized in that, distillation film in step 3, using but be not limited to the resistance to of PTFE
Sour material.
6. according to the method described in claim 1-5, which is characterized in that nanofiltration in diffusion dialysis, step 1 in step 1 and
Membrane distillation in step 3 includes using level-one membrane separating process.
7. according to the method described in claim 1, it is characterized in that, the high dope of aluminium ion in step 4 is respectively that aluminium chloride is molten
Liquid and aluminum sulfate solution.
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| CN110759554A (en) * | 2019-11-01 | 2020-02-07 | 扬州宏远电子股份有限公司 | Recycling and zero-discharge treatment method for ammonium adipate wastewater generated in aluminum foil formation |
| CN111495190A (en) * | 2020-04-28 | 2020-08-07 | 江苏永葆环保科技有限公司 | Comprehensive utilization method of aluminum-containing waste acid |
| CN112279440A (en) * | 2020-05-27 | 2021-01-29 | 江苏国瑞科技有限公司 | Recycling process of waste acid |
| CN113493278A (en) * | 2021-03-17 | 2021-10-12 | 波塞冬(江苏)新材料科技有限公司 | Membrane reactor system for preparing polyaluminum chloride from aluminum-containing wastewater |
| CN114477570A (en) * | 2022-01-17 | 2022-05-13 | 宿迁市华力新材料科技有限公司 | Wash paper tinsel waste water recovery system |
| CN115180761A (en) * | 2022-07-15 | 2022-10-14 | 中国海洋大学 | Resource utilization method of acidic wastewater in corrosion foil production |
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| CN114477570A (en) * | 2022-01-17 | 2022-05-13 | 宿迁市华力新材料科技有限公司 | Wash paper tinsel waste water recovery system |
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