CN106430270A - Method for producing polymeric aluminum sulfate by utilizing electrode foil corrosion waste sulfuric acid - Google Patents
Method for producing polymeric aluminum sulfate by utilizing electrode foil corrosion waste sulfuric acid Download PDFInfo
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- CN106430270A CN106430270A CN201610775527.0A CN201610775527A CN106430270A CN 106430270 A CN106430270 A CN 106430270A CN 201610775527 A CN201610775527 A CN 201610775527A CN 106430270 A CN106430270 A CN 106430270A
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- Prior art keywords
- sulfuric acid
- waste sulfuric
- aluminium
- electrode foil
- membrane
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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
Abstract
The invention relates to a method for producing polymeric aluminum sulfate by utilizing electrode foil corrosion waste sulfuric acid. High-quality polymeric aluminum sulfate is finally obtained by using electrode foil corrosion waste sulfuric acid as the raw material, carrying out ultra-filtration treatment, reacting in a tapered reaction kettle and adding citric acid in the polymerization reaction process. Compared with the prior art, the method is simple, makes full use of the electrode foil corrosion waste sulfuric acid, and has the advantages of low energy consumption, high production efficiency, high product quality, high added value of the product, and the like.
Description
Technical field
The present invention relates to electrode foil corrodes the recoverying and utilizing method of Waste Sulfuric Acid, particularly to a kind of useless using electrode foil corrosion
The method of gas washing in SA production poly aluminium sulfate.
Background technology
At present, there is more spent acid output, wherein in the corrosion chambering process that electrode foil produces：Sulphuric acid for 28%, Al3+ is
0.8%, hydrochloric acid and nitric acid are 1%, and density is 1140kg/m3, and room temperature is colourless.Electrode foil corrodes the recovery processing technique of Waste Sulfuric Acid
For：Spent acid ion exchange resin adds Calx and adjusts pH precipitation discharge.Although this technique passes through resin energy absorbed portion
Sulphuric acid, but after rinsing through water the concentration of sulphuric acid less than 20%, the sulfuric acid concentration that needs less than etching process, and aluminium ion therein
Concentration over-standard, not only wants enriching sulphuric acid during reuse, it is also contemplated that the impact to etching process for the aluminium ion concentration, cause partially recycled
Acid is unable to reuse；On the other hand add lime precipitation operation and produce substantial amounts of gypsum solid waste, must deliver in Solid Waste Treatment
The heart is processed, and costly, still needs to daily discharge substantial amounts of waste water, the wasting of resources simultaneously.
Patent CN102079512A discloses the work reclaiming sulphuric acid and sulfate from the spent acid of method for producing gtitanium dioxide with sulphuric acid
Skill, by using three condensations of three evaporations, not utilizing to the heat energy evaporating steam every time, energy consumption is big；Use membrane filter pressing
Machine is filtered, due to aluminum sulfate colloid formed in pressure-filtering process densification filter layer, affect the rate of filtration, and be difficult into
Row continuous operation, and do not reclaim out other material in discarded material yet.
Patent CN103935966A discloses the recovery processing technique that a kind of electrode foil corrodes Waste Sulfuric Acid, its pass through preheating,
Triple effect evaporation, cooling, condensation-crystallization, centrifugation, it is dried reclaiming sulphuric acid therein, technological process is long, low production efficiency, separately
Outer triple effect evaporator equipment investment is big, and process economy is poor.
Content of the invention
In order to overcome the above-mentioned deficiencies of the prior art, the invention provides a kind of production using electrode foil corrosion Waste Sulfuric Acid is gathered
The method of aluminum sulfate, it is excellent that the method has that response speed is fast, reaction conversion ratio is high, energy consumption is low, product poly aluminium sulfate quality is high
Point, the method is not only made full use of to electrode foil corrosion Waste Sulfuric Acid, and process is simple, and added value of product is high, product
Poly aluminium sulfate can be directly used for industrial water and the wastewater treatment of factory.
The solution of the present invention is：A kind of utilization electrode foil corrodes the method that Waste Sulfuric Acid produces poly aluminium sulfate, concrete step
Suddenly as follows：
1）Carry out pretreatment by pumping in ultrafiltration membrane treatment device from the electrode foil corrosion Waste Sulfuric Acid in Waste Sulfuric Acid storage tank, remove it
In solid, floccule, metal impurities, described ultrafilter membrane is inoranic membrane, and the aperture of ultrafilter membrane is 35-50nm；
2）Pretreated Waste Sulfuric Acid is inputted from taper reactor middle and lower part；
3）After pulverizing, particle diameter adds from taper reactor top for the aluminium of 80-120 mesh, and described aluminium is aluminium hydroxide or oxygen
Change aluminum；
4）Stirring reaction, control mixing speed is 100-150rpm, and reaction pH is 6.5-7.0, and reaction temperature is 90 DEG C -110 DEG C,
Response time is 1.0-1.5h;
5) calcium aluminate, citric acid to step 4 are added at 70 DEG C -90 DEG C）React in the solution obtaining, carry out polyreaction, instead
1-2h between seasonable, obtains polymerization liquid；
6）By step 5）After the polymerization liquid obtaining cools to 35 DEG C -45 DEG C, add high-molecular coagulant adopting polyacrylamide, protect
Warm 1-2h, obtains solution；
7）By step 6）The solution obtaining filters, and obtains the poly aluminium sulfate solution of brown.
Preferably, step 1）In ultrafilter membrane be selected from ceramic membrane, ultrafiltration pressure be 0.1-0.2MPa.
Preferably, step 3）Middle aluminium and step 1）The weight of middle sulfur waste acid starting material is than for 0.3-0.4：1.
Preferably, step 5）The addition of middle calcium aluminate is the 40%-50% of aluminium weight, and the addition of citric acid is aluminium
The 3%-10% of weight.
Preferably, step 6）The addition of middle polyacrylamide is the 1%-5% of aluminium weight.
The present invention compared with prior art has advantages below：
（1）The utilization rate of spent acid is high, does not adopt the operations such as evaporation, the distillation of high energy consumption and equipment simultaneously；
（2）Pretreatment is carried out using ultrafilter membrane, effectively eliminates the impurity in spent acid, improve the quality of product；
（3）Using taper reactor, response speed is fast, and reaction is abundant, the high income of reaction, and reaction efficiency carries than common response device
High 30-50%；
（4）Add citric acid in polyreaction, improve the quality of product so that the mass fraction of insoluble matter in final products
<0.1%, basicity is 50%-60%, alumina content（wt%）For 8%-10%, meet national standard.
Specific embodiment
With reference to embodiment, the present invention will be described in detail, and embodiment is only the preferred embodiment of the present invention,
It is not limitation of the invention.
Embodiment 1
A kind of utilization electrode foil corrodes the method that Waste Sulfuric Acid produces poly aluminium sulfate, comprises the following steps that：
1）Carry out pretreatment by pumping in ultrafiltration membrane treatment device from the electrode foil corrosion Waste Sulfuric Acid in Waste Sulfuric Acid storage tank, remove it
In solid, floccule, metal impurities, described ultrafilter membrane is ceramic membrane, and the aperture of ultrafilter membrane is 50nm, and ultrafiltration pressure is
0.15 MPa；
2）Pretreated Waste Sulfuric Acid is inputted from taper reactor middle and lower part；
3）After pulverizing, particle diameter adds from taper reactor top for the aluminium of 80-120 mesh, and described aluminium is aluminium hydroxide；Aluminum
Material and step 1）The weight of middle sulfur waste acid starting material is than for 0.3；
4）Stirring reaction, control mixing speed is 100rpm, and reaction pH is 6.8, and reaction temperature is 100 DEG C, and the response time is
1.0h;
5) calcium aluminate, citric acid to step 4 are added at 70 DEG C）React in the solution obtaining, carry out polyreaction, during reaction
Between 1h, obtain polymerization liquid；The addition of calcium aluminate is the 40% of aluminium weight, and the addition of citric acid is aluminium weight
3.5%；
6）By step 5）After the polymerization liquid obtaining cools to 35 DEG C, add high-molecular coagulant adopting polyacrylamide, insulation
1.0h, obtains solution；The addition of polyacrylamide is the 1% of aluminium weight；
7）By step 6）The solution obtaining filters, and obtains the poly aluminium sulfate solution of brown.
After testing, the poly aluminium sulfate solution obtaining is wherein：The mass fraction of aluminium oxide is 8.6%, and basicity is 57.3%, no
The mass fraction of molten thing is 0.08%.
Embodiment 2
A kind of utilization electrode foil corrodes the method that Waste Sulfuric Acid produces poly aluminium sulfate, comprises the following steps that：
1）Carry out pretreatment by pumping in ultrafiltration membrane treatment device from the electrode foil corrosion Waste Sulfuric Acid in Waste Sulfuric Acid storage tank, remove it
In solid, floccule, metal impurities, described ultrafilter membrane is ceramic membrane, and the aperture of ultrafilter membrane is 45nm, and ultrafiltration pressure is
0.15 MPa；
2）Pretreated Waste Sulfuric Acid is inputted from taper reactor middle and lower part；
3）After pulverizing, particle diameter adds from taper reactor top for the aluminium of 80-120 mesh, and described aluminium is aluminium hydroxide；Aluminum
Material and step 1）The weight of middle sulfur waste acid starting material is than for 0.4；
4）Stirring reaction, control mixing speed is 100rpm, and reaction pH is 6.5, and reaction temperature is 100 DEG C, and the response time is
1.0h;
5) calcium aluminate, citric acid to step 4 are added at 75 DEG C）React in the solution obtaining, carry out polyreaction, during reaction
Between 1h, obtain polymerization liquid；The addition of calcium aluminate is the 45% of aluminium weight, and the addition of citric acid is aluminium weight
5%；
6）By step 5）After the polymerization liquid obtaining cools to 40 DEG C, add high-molecular coagulant adopting polyacrylamide, insulation
1.5h, obtains solution；The addition of polyacrylamide is the 1.5% of aluminium weight；
7）By step 6）The solution obtaining filters, and obtains the poly aluminium sulfate solution of brown.
After testing, the poly aluminium sulfate solution obtaining is wherein：The mass fraction of aluminium oxide is 9.1%, and basicity is 59.0%, no
The mass fraction of molten thing is 0.03%.
Comparative example 1
In addition to not adopting ultrafilter membrane pretreatment, remaining is identical with example 1.
After testing, the poly aluminium sulfate solution obtaining is wherein：The mass fraction of aluminium oxide is 8.5%, and basicity is 55.9%, no
The mass fraction of molten thing is 0.25%.
Comparative example 2
Except being replaced in addition to taper reactor using conventional reactor, remaining is identical with example 1.
After testing, the poly aluminium sulfate solution obtaining is wherein：The mass fraction of aluminium oxide is 7.6%, and basicity is 53.2%, no
The mass fraction of molten thing is 0.08%.
In addition, step 4）、5）、6）The total operating time of three needs could obtain for more than 5 hours to refer to embodiment 1 mass
Mark close product it is seen that reaction can substantially be accelerated using taper reactor so that reaction is abundant, improve production efficiency.
Comparative example 3
Except in step 5）Outside without citric acid, remaining is identical with example 2.
After testing, the poly aluminium sulfate solution obtaining is wherein：The mass fraction of aluminium oxide is 8.8%, and basicity is 57.6%, no
The mass fraction of molten thing is 0.04%.
The present invention can be summarized without prejudice to the concrete form of the spirit or essential characteristics of the present invention with others.The present invention's
Above-described embodiment all can only be considered the description of the invention rather than restriction, every substantial technological according to the present invention to more than
Any trickle amendment, equivalent variations and modification that embodiment is made, belong in the range of technical solution of the present invention.
Claims (4)
1. a kind of utilization electrode foil corrode Waste Sulfuric Acid produce poly aluminium sulfate method it is characterised in that：Comprise the following steps that：
1）Carry out pretreatment by pumping in ultrafiltration membrane treatment device from the electrode foil corrosion Waste Sulfuric Acid in Waste Sulfuric Acid storage tank, remove it
In solid, floccule, metal impurities, described ultrafilter membrane is inoranic membrane, and the aperture of ultrafilter membrane is 35-50nm；
2）Pretreated Waste Sulfuric Acid is inputted from taper reactor middle and lower part；
3）After pulverizing, particle diameter adds from taper reactor top for the aluminium of 80-120 mesh, and described aluminium is aluminium hydroxide or oxygen
Change aluminum；
4）Stirring reaction, control mixing speed is 100-150rpm, and reaction pH is 6.5-7.0, and reaction temperature is 90 DEG C -110 DEG C,
Response time is 1.0-1.5h;
5) calcium aluminate, citric acid to step 4 are added at 70 DEG C -90 DEG C）React in the solution obtaining, carry out polyreaction, instead
1-2h between seasonable, obtains polymerization liquid；
6）By step 5）After the polymerization liquid obtaining cools to 35 DEG C -45 DEG C, add high-molecular coagulant adopting polyacrylamide, protect
Warm 1-2h, obtains solution；
7）By step 6）The solution obtaining filters, and obtains the poly aluminium sulfate solution of brown.
2. according to claim 1 a kind of utilization electrode foil corrode Waste Sulfuric Acid produce poly aluminium sulfate method it is characterised in that：
Step 1）In ultrafilter membrane be selected from ceramic membrane, ultrafiltration pressure be 0.1-0.2MPa.
3. according to claim 1 a kind of utilization electrode foil corrode Waste Sulfuric Acid produce poly aluminium sulfate method it is characterised in that：
Step 3）Middle aluminium and step 1）The weight of middle sulfur waste acid starting material is than for 0.3-0.4：1.
4. according to claim 1 a kind of utilization electrode foil corrode Waste Sulfuric Acid produce poly aluminium sulfate method it is characterised in that：
Step 5）The addition of middle calcium aluminate is the 40%-50% of aluminium weight, and the addition of citric acid is the 3%-10% of aluminium weight, step
Rapid 6）The addition of middle polyacrylamide is the 1%-5% of aluminium weight.
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| CN201610775527.0A CN106430270A (en) | 2016-08-31 | 2016-08-31 | Method for producing polymeric aluminum sulfate by utilizing electrode foil corrosion waste sulfuric acid |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108358409A (en) * | 2018-03-07 | 2018-08-03 | 江苏天楹环保能源成套设备有限公司 | A kind of steel wire rope sludge and spent acid method for innocent treatment |
| CN108545765A (en) * | 2018-05-17 | 2018-09-18 | 深圳市长隆科技有限公司 | A method of Waste Acid From Hua Cheng Foil spent acid is prepared into aluminium polychloride and polyaluminium sulfate |
| CN108715456A (en) * | 2018-08-14 | 2018-10-30 | 徐晨 | A kind of recoverying and utilizing method of electrode foil corrosion waste nitric acid |
| CN112575360A (en) * | 2020-12-11 | 2021-03-30 | 佛山市戴盟科技有限公司 | Tank-discharge-free additive for anodic oxidation tank and production process thereof |
| CN108203083B (en) * | 2018-01-30 | 2021-11-16 | 新疆智诚同欣环保科技有限公司 | Method and device for recovering waste sulfuric acid and waste aluminum sulfate during electrode foil production |
| CN115477411A (en) * | 2022-08-22 | 2022-12-16 | 乳源瑶族自治县东阳光化成箔有限公司 | Treatment method for simultaneously treating high-concentration and low-concentration electrode foil sulfuric acid waste liquid |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108203083B (en) * | 2018-01-30 | 2021-11-16 | 新疆智诚同欣环保科技有限公司 | Method and device for recovering waste sulfuric acid and waste aluminum sulfate during electrode foil production |
| CN108358409A (en) * | 2018-03-07 | 2018-08-03 | 江苏天楹环保能源成套设备有限公司 | A kind of steel wire rope sludge and spent acid method for innocent treatment |
| CN108545765A (en) * | 2018-05-17 | 2018-09-18 | 深圳市长隆科技有限公司 | A method of Waste Acid From Hua Cheng Foil spent acid is prepared into aluminium polychloride and polyaluminium sulfate |
| CN108715456A (en) * | 2018-08-14 | 2018-10-30 | 徐晨 | A kind of recoverying and utilizing method of electrode foil corrosion waste nitric acid |
| CN112575360A (en) * | 2020-12-11 | 2021-03-30 | 佛山市戴盟科技有限公司 | Tank-discharge-free additive for anodic oxidation tank and production process thereof |
| CN112575360B (en) * | 2020-12-11 | 2022-05-10 | 佛山市戴盟科技有限公司 | Tank-discharge-free additive for anodic oxidation tank and production process thereof |
| CN115477411A (en) * | 2022-08-22 | 2022-12-16 | 乳源瑶族自治县东阳光化成箔有限公司 | Treatment method for simultaneously treating high-concentration and low-concentration electrode foil sulfuric acid waste liquid |
| CN115477411B (en) * | 2022-08-22 | 2024-01-26 | 乳源瑶族自治县东阳光化成箔有限公司 | Treatment method for simultaneously treating high-low concentration electrode foil sulfuric acid waste liquid |
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Application publication date: 20170222 |