CN116770069A - Method for removing iron ions and recycling acid from high-concentration iron-containing waste liquid - Google Patents
Method for removing iron ions and recycling acid from high-concentration iron-containing waste liquid Download PDFInfo
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- CN116770069A CN116770069A CN202310756827.4A CN202310756827A CN116770069A CN 116770069 A CN116770069 A CN 116770069A CN 202310756827 A CN202310756827 A CN 202310756827A CN 116770069 A CN116770069 A CN 116770069A
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 94
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 62
- -1 iron ions Chemical class 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000002253 acid Substances 0.000 title claims abstract description 14
- 238000004064 recycling Methods 0.000 title claims abstract description 8
- 239000002699 waste material Substances 0.000 title description 4
- 239000007788 liquid Substances 0.000 title description 3
- 238000006243 chemical reaction Methods 0.000 claims abstract description 40
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000001301 oxygen Substances 0.000 claims abstract description 19
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 19
- 239000006228 supernatant Substances 0.000 claims abstract description 17
- 239000012066 reaction slurry Substances 0.000 claims abstract description 15
- 159000000000 sodium salts Chemical class 0.000 claims abstract description 7
- 238000007599 discharging Methods 0.000 claims abstract description 6
- 238000003756 stirring Methods 0.000 claims abstract description 6
- 238000004062 sedimentation Methods 0.000 claims abstract description 4
- 238000000151 deposition Methods 0.000 claims abstract description 3
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 13
- 229910052938 sodium sulfate Inorganic materials 0.000 claims description 13
- 235000011152 sodium sulphate Nutrition 0.000 claims description 13
- 230000035484 reaction time Effects 0.000 claims description 8
- GPRLSGONYQIRFK-UHFFFAOYSA-N hydron Chemical compound [H+] GPRLSGONYQIRFK-UHFFFAOYSA-N 0.000 claims description 7
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 claims description 4
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 claims description 4
- 150000001450 anions Chemical class 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- WBHQBSYUUJJSRZ-UHFFFAOYSA-M sodium bisulfate Chemical compound [Na+].OS([O-])(=O)=O WBHQBSYUUJJSRZ-UHFFFAOYSA-M 0.000 claims description 2
- 229910000342 sodium bisulfate Inorganic materials 0.000 claims description 2
- 235000010344 sodium nitrate Nutrition 0.000 claims description 2
- 239000004317 sodium nitrate Substances 0.000 claims description 2
- 235000010265 sodium sulphite Nutrition 0.000 claims description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 239000000243 solution Substances 0.000 description 37
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 12
- 239000011259 mixed solution Substances 0.000 description 12
- 239000001257 hydrogen Substances 0.000 description 8
- 229910052739 hydrogen Inorganic materials 0.000 description 8
- 238000004458 analytical method Methods 0.000 description 6
- 238000003556 assay Methods 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- 229920006395 saturated elastomer Polymers 0.000 description 6
- 239000002893 slag Substances 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 238000002386 leaching Methods 0.000 description 4
- 238000001179 sorption measurement Methods 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- IEECXTSVVFWGSE-UHFFFAOYSA-M iron(3+);oxygen(2-);hydroxide Chemical compound [OH-].[O-2].[Fe+3] IEECXTSVVFWGSE-UHFFFAOYSA-M 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 229960004887 ferric hydroxide Drugs 0.000 description 2
- 238000009854 hydrometallurgy Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 239000005708 Sodium hypochlorite Substances 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- 239000003929 acidic solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229920001429 chelating resin Polymers 0.000 description 1
- 238000009388 chemical precipitation Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229910001448 ferrous ion Inorganic materials 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229910052706 scandium Inorganic materials 0.000 description 1
- SIXSYDAISGFNSX-UHFFFAOYSA-N scandium atom Chemical compound [Sc] SIXSYDAISGFNSX-UHFFFAOYSA-N 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Landscapes
- Compounds Of Iron (AREA)
Abstract
The invention provides a method for removing iron ions and recycling acid from a high-concentration iron-containing solution, which comprises the following steps: s1, pouring an iron-containing solution and a proper amount of sodium salt into a stirring tank for stirring uniformly; s2, adding the uniformly stirred iron-containing solution into a pressure reaction kettle, and continuously introducing oxygen in the reaction process for reaction; and S3, discharging the reaction slurry into a sedimentation tank after the reaction is finished, standing for a period of time, and then depositing filter residues into the bottom of the tank, and discharging supernatant through a discharge port for recycling. The invention has low production cost, green and high efficiency.
Description
Technical Field
The invention relates to the technical field of hydrometallurgy, in particular to a method for removing iron ions and recycling acid from a high-concentration iron-containing solution.
Background
In hydrometallurgy industry, sulfuric acid is commonly used as a leaching agent to leach pre-recovered elements in materials, and then the leaching solution is purified and separated to obtain a final product. However, sulfuric acid, which is an inorganic strong acid, reacts with most metal elements and has poor leaching selectivity. Thus, after separation of valuable elements, acidic solutions rich in low-value elements such as iron, magnesium, manganese, etc. are often produced. In practice, such solutions are often treated by chemical precipitation, resin adsorption, and the like.
The conventional method for removing iron ions in the solution mostly adopts alkaline substances such as lime, sodium hydroxide, magnesium oxide and the like to adjust the pH value of the solution to 2.5-3.5, so that the iron ions are removed in the form of ferric hydroxide, and if divalent iron ions exist in the solution, hydrogen peroxide, sodium hypochlorite and the like are additionally added for pre-oxidation, a large amount of alkaline substances are needed to neutralize residual acid in the solution, so that the method wastes residual acid, generates a large amount of iron-containing waste residues, and increases the treatment cost.
In the prior art, ferrous ions in the solution are oxidized into trivalent in advance, an adsorption carrier is added, then metal oxide or metal carbonate is added to adjust the pH value of the solution to 2.0-4.2, iron is removed in a ferric hydroxide form, iron-removing slag is used as an adsorption material, the method realizes the efficient removal and recycling of the iron ions, but the method is only suitable for treating the solution with the concentration of the iron ions below 5g/L, and is not suitable for treating the solution with high content of the iron ions. Meanwhile, the method adopts alkali substances to adjust the pH of the solution, has high production cost, and is easy to form ferric hydroxide colloid substances in the reaction process, thereby influencing the molding and application of the adsorption material.
The acidity of the scandium-containing solution is adjusted to 0.5-8 mol/L in advance, then chloride ions and iron ions in the solution are added to form complex anions, and then chelating resin is used for adsorbing and removing impurity ions such as iron, zirconium and the like.
Disclosure of Invention
Aiming at the problems that the prior art needs to remove iron ions under the weak acid condition or the method for removing iron ions is complex and needs to use a large amount of reagents, the invention provides a simple method for removing iron ions under the strong acid condition.
Specifically, the invention provides the following technical scheme:
a method for removing iron ions and recovering acid from a high concentration iron-containing solution comprising:
s1, pouring an iron-containing solution and a proper amount of sodium salt into a stirring tank for stirring uniformly;
s2, adding the uniformly stirred iron-containing solution into a pressure reaction kettle, and continuously introducing oxygen in the reaction process for reaction;
and S3, discharging the reaction slurry into a sedimentation tank after the reaction is finished, standing for a period of time, and then depositing filter residues into the bottom of the tank, and discharging supernatant through a discharge port for recycling.
Optionally, in step S1, the iron-containing solution is obtained by concentrating a solution obtained by extracting valuable elements with sulfuric acid as a leaching agent, and anions are mainly sulfate radicals; iron content is 50-75 g/L (Fe) 2+ ：40～60g/L、Fe 3+ : 10-15 g/L) solution ph=0-0.1.
Optionally, in step S1, the sodium salt is selected from one or more of sodium sulfate, sodium sulfite, sodium nitrate or sodium bisulfate, preferably sodium sulfate; the addition amount of sodium salt is 15-35 g/L. The solution comes from a sulfuric acid system, and sodium sulfate is adopted, so that the solution has low price and low production cost; sodium sulfate is added for iron removal, the generated corresponding product is sulfuric acid, other impurities are not introduced, and the solution after iron removal can be reused.
Optionally, in the step S2, the reaction temperature is 140-180 ℃, the reaction time is 1-2 h, the oxygen introducing pressure is 1.2-1.5 MPa, and the reaction process is as follows:
12FeSO 4 +3O 2 +2Na2SO 4 +18H 2 O＝4NaFe 3 (SO 4 ) 2 (OH) 6 +6H 2 SO 4
3Fe 2 (SO 4 ) 3 +Na 2 SO 4 +12H 2 O＝2NaFe 3 (SO 4 ) 2 (OH) 6 +6H2SO 4
optionally, in the step S3, the standing time is 10-30 min, suspended particles are not in supernatant, the concentration of iron ions is 3-6 g/L, and the concentration of hydrogen ions is 2-2.5 mol/L.
The technical scheme provided by the invention has the beneficial effects that at least:
1) The invention can realize the removal of iron ions under the strong acid condition, the iron removal rate can reach 90 percent, no extra alkali substances are needed to be added to adjust the pH value, the medicament consumption is saved, and the production cost is low.
2) The invention removes iron in the pH value of the solution=0-0.1, the acidity of the reaction system is higher (the acidity of the end point of the reaction can reach 2.0-2.5 mol/L), the other ions can be effectively prevented from entering the iron-removing slag phase, and the iron-removing slag is easy to process and apply.
3) The invention can generate new sulfuric acid in the iron removal process, the concentration of hydrogen ions in the solution after iron removal can reach 2.0-2.5 mol/L, and the part of residual acid can be recycled, thereby being environment-friendly.
4) The iron-removing slag obtained by the invention has large particles and high sedimentation speed, and can realize solid-liquid separation without filter pressing equipment.
The invention realizes the efficient removal of iron ions from the high-concentration iron-containing solution, and simultaneously recovers and recycles the residual acid, thereby having low production cost, greenness and high efficiency.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is an XRD pattern of iron-removing slag prepared by the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
Comparative example 1
S1, 300ml of a solution with the iron ion concentration of 55g/L, pH =0.05 (hydrogen ion concentration of 0.9 mol/L) is taken, 2g of sodium sulfate is added, and the mixture is stirred for 10min at room temperature (25 ℃) to obtain a mixed solution.
S2, pouring the mixed solution of S1 into an autoclave for reaction, setting the reaction temperature to 170 ℃, the oxygen introducing pressure to 1.2MPa (saturated vapor pressure to 0.85 MPa), and the reaction time to 1.5h, closing an oxygen introducing valve after the reaction is finished, and pouring out reaction slurry.
S3, standing the reaction slurry poured out from the S2 for 10min, taking a supernatant for analysis and assay, wherein the content of iron ions in the obtained supernatant is 25.5g/L and the concentration of hydrogen ions is 1.8mol/L. (this comparative example illustrates that the sodium sulfate is not added in sufficient amount and the iron removal rate is very low)
Comparative example 2
S1, 300ml of a solution with the iron ion concentration of 55g/L, pH =0.05 (hydrogen ion concentration of 0.9 mol/L) is taken, 10g of sodium sulfate is added, and the mixture is stirred for 10min at room temperature (25 ℃) to obtain a mixed solution.
S2, pouring the mixed solution of S1 into an autoclave for reaction, setting the reaction temperature at 140 ℃, the oxygen introducing pressure at 1.2MPa (saturated vapor pressure at 0.45 MPa) and the reaction time at 1.5h, closing an oxygen introducing valve after the reaction is finished, and pouring out reaction slurry.
S3, standing the reaction slurry poured out from the S2 for 10min, taking a supernatant for analysis and assay, wherein the content of iron ions in the obtained supernatant is 17.5g/L and the concentration of hydrogen ions is 2.01mol/L. (this comparative example illustrates that the reaction temperature is insufficient and the solution iron removal rate is insufficient)
Comparative example 3
S1, 300ml of a solution with the iron ion concentration of 55g/L, pH =0.05 (hydrogen ion concentration of 0.9 mol/L) is taken, 10g of sodium sulfate is added, and the mixture is stirred for 10min at room temperature (25 ℃) to obtain a mixed solution.
S2, pouring the mixed solution of S1 into an autoclave for reaction, setting the reaction temperature to 170 ℃, the oxygen introducing pressure to 0.90MPa (saturated vapor pressure to 0.85 MPa), and the reaction time to 1.5h, closing an oxygen introducing valve after the reaction is finished, and pouring out reaction slurry.
S3, standing the reaction slurry poured out from the S2 for 10min, taking a supernatant for analysis and assay, wherein the content of iron ions in the obtained supernatant is 14.6g/L and the concentration of hydrogen ions is 1.97mol/L. (this comparative example illustrates that the reaction has insufficient oxygen pressure, i.e., insufficient oxygen pressure, insufficient iron removal from the solution)
Example 1
S1, 300ml of a solution with the iron ion concentration of 55g/L, pH =0.05 (hydrogen ion concentration of 0.9 mol/L) is taken, 10g of sodium sulfate is added, and the mixture is stirred for 10min at room temperature (25 ℃) to obtain a mixed solution.
S2, pouring the mixed solution of S1 into an autoclave for reaction, setting the reaction temperature to 170 ℃, the oxygen introducing pressure to 1.2MPa (saturated vapor pressure to 0.85 MPa), and the reaction time to 1.5h, closing an oxygen introducing valve after the reaction is finished, and pouring out reaction slurry.
S3, standing the reaction slurry poured out from the S2 for 10min, taking a supernatant for analysis and assay, wherein the content of iron ions in the obtained supernatant is 5.5g/L and the concentration of hydrogen ions is 2.3mol/L.
Example 2
S1, 300ml of a solution with the iron ion concentration of 55g/L, pH =0.05 (hydrogen ion concentration of 0.9 mol/L) is taken, 10g of sodium sulfate is added, and the mixture is stirred for 10min at room temperature (25 ℃) to obtain a mixed solution.
S2, pouring the mixed solution of S1 into a pressurized reaction kettle for reaction, setting the reaction temperature to 180 ℃, and the oxygen introducing pressure to be 1.2MPa (saturated vapor pressure to be 0.95 MPa) and the reaction time to be 1.5h, closing an oxygen introducing valve after the reaction is finished, and pouring out reaction slurry.
S3, standing the reaction slurry poured out from the S2 for 10min, taking a supernatant for analysis and assay, wherein the content of iron ions in the obtained supernatant is 3.5g/L and the concentration of hydrogen ions is 2.6mol/L.
Example 3
S1, 300ml of a solution with the iron ion concentration of 55g/L, pH =0 (hydrogen ion concentration of 1 mol/L) is taken, 10g of sodium sulfate is added, and the mixture is stirred for 10min at room temperature (25 ℃) to obtain a mixed solution.
S2, pouring the mixed solution of S1 into a pressurized reaction kettle for reaction, setting the reaction temperature to 170 ℃, and the oxygen introducing pressure to be 1.2MPa (saturated vapor pressure to be 0.85 MPa) and the reaction time to be 1.5 hours, closing an oxygen introducing valve after the reaction is finished, and pouring out reaction slurry.
S3, standing the reaction slurry poured out from the S2 for 10min, taking a supernatant for analysis and assay, wherein the content of iron ions in the obtained supernatant is 8.5g/L and the concentration of hydrogen ions is 2.05mol/L.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (5)
1. A method for removing iron ions and recovering acid from a high concentration iron-containing solution, comprising:
s1, pouring an iron-containing solution and a proper amount of sodium salt into a stirring tank for stirring uniformly;
s2, adding the uniformly stirred iron-containing solution into a pressure reaction kettle, and continuously introducing oxygen in the reaction process for reaction;
and S3, discharging the reaction slurry into a sedimentation tank after the reaction is finished, standing for a period of time, and then depositing filter residues into the bottom of the tank, and discharging supernatant through a discharge port for recycling.
2. The method according to claim 1, wherein in step S1, the anions in the iron-containing solution are mainly sulfate; the iron content is 50-75 g/L; solution ph=0 to 0.1.
3. The method according to claim 1, wherein in step S1, the sodium salt is selected from one or more of sodium sulfate, sodium sulfite, sodium nitrate or sodium bisulfate, preferably sodium sulfate; the addition amount of sodium salt is 15-35 g/L.
4. The method according to claim 1, wherein in step S2, the reaction temperature is 140 to 180 ℃, the reaction time is 1 to 2 hours, and the oxygen introducing pressure is 1.2 to 1.5MPa.
5. The method according to claim 1, wherein in step S3, the standing time is 10 to 30 minutes, no suspended particles are present in the supernatant, the iron ion concentration is 3 to 6g/L, and the hydrogen ion concentration is 2 to 2.5mol/L.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310756827.4A CN116770069A (en) | 2023-06-25 | 2023-06-25 | Method for removing iron ions and recycling acid from high-concentration iron-containing waste liquid |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310756827.4A CN116770069A (en) | 2023-06-25 | 2023-06-25 | Method for removing iron ions and recycling acid from high-concentration iron-containing waste liquid |
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| CN116770069A true CN116770069A (en) | 2023-09-19 |
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| CN202310756827.4A Pending CN116770069A (en) | 2023-06-25 | 2023-06-25 | Method for removing iron ions and recycling acid from high-concentration iron-containing waste liquid |
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| CN115652091A (en) * | 2022-09-13 | 2023-01-31 | 六盘水中联工贸实业有限公司 | Method for removing and recovering sodium from zinc electrolysis waste liquid with high sodium content |
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2023
- 2023-06-25 CN CN202310756827.4A patent/CN116770069A/en active Pending
Patent Citations (8)
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| CN101476041A (en) * | 2008-12-12 | 2009-07-08 | 佛山市邦普镍钴技术有限公司 | Method for separating and recycling copper, nickel and regenerative plastic from waste electroplating plastic |
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