WO2023211260A1 - 아연 제련 공정의 부산물로부터 황산망간 일수화물을 제조하는 방법 - Google Patents
아연 제련 공정의 부산물로부터 황산망간 일수화물을 제조하는 방법 Download PDFInfo
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- WO2023211260A1 WO2023211260A1 PCT/KR2023/005959 KR2023005959W WO2023211260A1 WO 2023211260 A1 WO2023211260 A1 WO 2023211260A1 KR 2023005959 W KR2023005959 W KR 2023005959W WO 2023211260 A1 WO2023211260 A1 WO 2023211260A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- manganese
- leaching
- sulfate monohydrate
- manganese sulfate
- impurity removal
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 185
- ISPYRSDWRDQNSW-UHFFFAOYSA-L manganese(II) sulfate monohydrate Chemical compound O.[Mn+2].[O-]S([O-])(=O)=O ISPYRSDWRDQNSW-UHFFFAOYSA-L 0.000 title claims abstract description 57
- 239000006227 byproduct Substances 0.000 title claims abstract description 54
- 239000011701 zinc Substances 0.000 title claims abstract description 25
- 229910052725 zinc Inorganic materials 0.000 title claims abstract description 22
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 title claims abstract description 21
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 13
- 238000007670 refining Methods 0.000 title abstract 2
- 239000011572 manganese Substances 0.000 claims abstract description 107
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims abstract description 104
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 104
- 239000012535 impurity Substances 0.000 claims abstract description 89
- 238000002386 leaching Methods 0.000 claims abstract description 53
- 238000000638 solvent extraction Methods 0.000 claims abstract description 26
- 238000006386 neutralization reaction Methods 0.000 claims abstract description 15
- 238000004140 cleaning Methods 0.000 claims abstract description 14
- 238000002425 crystallisation Methods 0.000 claims abstract description 11
- 230000008025 crystallization Effects 0.000 claims abstract description 11
- 238000001704 evaporation Methods 0.000 claims abstract description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 36
- 238000000227 grinding Methods 0.000 claims description 23
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 20
- 238000005406 washing Methods 0.000 claims description 20
- 239000012074 organic phase Substances 0.000 claims description 19
- 229940099596 manganese sulfate Drugs 0.000 claims description 15
- 239000011702 manganese sulphate Substances 0.000 claims description 15
- 235000007079 manganese sulphate Nutrition 0.000 claims description 15
- 238000005201 scrubbing Methods 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 229910052751 metal Inorganic materials 0.000 claims description 13
- 239000002184 metal Substances 0.000 claims description 13
- 150000007522 mineralic acids Chemical class 0.000 claims description 13
- PUZPDOWCWNUUKD-UHFFFAOYSA-M sodium fluoride Chemical compound [F-].[Na+] PUZPDOWCWNUUKD-UHFFFAOYSA-M 0.000 claims description 13
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 12
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 11
- 229910001385 heavy metal Inorganic materials 0.000 claims description 11
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 239000003638 chemical reducing agent Substances 0.000 claims description 8
- 238000009854 hydrometallurgy Methods 0.000 claims description 8
- 238000011068 loading method Methods 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 8
- 238000001556 precipitation Methods 0.000 claims description 7
- 238000005868 electrolysis reaction Methods 0.000 claims description 6
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 5
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 claims description 5
- 239000011775 sodium fluoride Substances 0.000 claims description 5
- 235000013024 sodium fluoride Nutrition 0.000 claims description 5
- 239000000395 magnesium oxide Substances 0.000 claims description 4
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 4
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 4
- 235000006408 oxalic acid Nutrition 0.000 claims description 4
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 claims description 3
- HIVLDXAAFGCOFU-UHFFFAOYSA-N ammonium hydrosulfide Chemical compound [NH4+].[SH-] HIVLDXAAFGCOFU-UHFFFAOYSA-N 0.000 claims description 3
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 3
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 claims description 3
- 239000000347 magnesium hydroxide Substances 0.000 claims description 3
- 229910001862 magnesium hydroxide Inorganic materials 0.000 claims description 3
- -1 soda hydride Chemical class 0.000 claims description 3
- ZNCPFRVNHGOPAG-UHFFFAOYSA-L sodium oxalate Chemical compound [Na+].[Na+].[O-]C(=O)C([O-])=O ZNCPFRVNHGOPAG-UHFFFAOYSA-L 0.000 claims description 3
- 229940039790 sodium oxalate Drugs 0.000 claims description 3
- 239000000920 calcium hydroxide Substances 0.000 claims description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 2
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 2
- 239000000292 calcium oxide Substances 0.000 claims description 2
- 229910000037 hydrogen sulfide Inorganic materials 0.000 claims description 2
- 229910052979 sodium sulfide Inorganic materials 0.000 claims description 2
- GRVFOGOEDUUMBP-UHFFFAOYSA-N sodium sulfide (anhydrous) Chemical compound [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 claims description 2
- 239000000243 solution Substances 0.000 abstract description 34
- 238000010298 pulverizing process Methods 0.000 abstract description 7
- 239000007864 aqueous solution Substances 0.000 abstract description 6
- SQQMAOCOWKFBNP-UHFFFAOYSA-L manganese(II) sulfate Chemical compound [Mn+2].[O-]S([O-])(=O)=O SQQMAOCOWKFBNP-UHFFFAOYSA-L 0.000 abstract description 4
- 230000003472 neutralizing effect Effects 0.000 abstract description 4
- 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 abstract description 3
- 229910000357 manganese(II) sulfate Inorganic materials 0.000 abstract 2
- 239000011734 sodium Substances 0.000 description 15
- 239000011575 calcium Substances 0.000 description 12
- 239000002994 raw material Substances 0.000 description 11
- 229910052791 calcium Inorganic materials 0.000 description 10
- 239000011777 magnesium Substances 0.000 description 10
- 229910052749 magnesium Inorganic materials 0.000 description 9
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 8
- 229910052708 sodium Inorganic materials 0.000 description 8
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 7
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 7
- 229910052700 potassium Inorganic materials 0.000 description 7
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 239000011591 potassium Substances 0.000 description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 5
- 238000002360 preparation method Methods 0.000 description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- 239000008346 aqueous phase Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 3
- 229910052793 cadmium Inorganic materials 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 229910052744 lithium Inorganic materials 0.000 description 3
- 229910001416 lithium ion Inorganic materials 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- 239000007774 positive electrode material Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 238000002441 X-ray diffraction Methods 0.000 description 2
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 229910017052 cobalt Inorganic materials 0.000 description 2
- 239000010941 cobalt Substances 0.000 description 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- AMWRITDGCCNYAT-UHFFFAOYSA-L hydroxy(oxo)manganese;manganese Chemical compound [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 239000002243 precursor Substances 0.000 description 2
- JBQYATWDVHIOAR-UHFFFAOYSA-N tellanylidenegermanium Chemical compound [Te]=[Ge] JBQYATWDVHIOAR-UHFFFAOYSA-N 0.000 description 2
- ZDFBXXSHBTVQMB-UHFFFAOYSA-N 2-ethylhexoxy(2-ethylhexyl)phosphinic acid Chemical compound CCCCC(CC)COP(O)(=O)CC(CC)CCCC ZDFBXXSHBTVQMB-UHFFFAOYSA-N 0.000 description 1
- 229910004261 CaF 2 Inorganic materials 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 229910019440 Mg(OH) Inorganic materials 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- QUXFOKCUIZCKGS-UHFFFAOYSA-N bis(2,4,4-trimethylpentyl)phosphinic acid Chemical compound CC(C)(C)CC(C)CP(O)(=O)CC(C)CC(C)(C)C QUXFOKCUIZCKGS-UHFFFAOYSA-N 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 239000006182 cathode active material Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- VDQVEACBQKUUSU-UHFFFAOYSA-M disodium;sulfanide Chemical compound [Na+].[Na+].[SH-] VDQVEACBQKUUSU-UHFFFAOYSA-M 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- OQTQHQORDRKHFW-UHFFFAOYSA-L manganese(2+);sulfate;heptahydrate Chemical compound O.O.O.O.O.O.O.[Mn+2].[O-]S([O-])(=O)=O OQTQHQORDRKHFW-UHFFFAOYSA-L 0.000 description 1
- CDUFCUKTJFSWPL-UHFFFAOYSA-L manganese(II) sulfate tetrahydrate Chemical compound O.O.O.O.[Mn+2].[O-]S([O-])(=O)=O CDUFCUKTJFSWPL-UHFFFAOYSA-L 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 239000011707 mineral Chemical class 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- 238000001238 wet grinding Methods 0.000 description 1
Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G45/00—Compounds of manganese
- C01G45/10—Sulfates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D11/00—Solvent extraction
- B01D11/04—Solvent extraction of solutions which are liquid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D9/00—Crystallisation
- B01D9/0018—Evaporation of components of the mixture to be separated
- B01D9/0031—Evaporation of components of the mixture to be separated by heating
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G45/00—Compounds of manganese
- C01G45/003—Preparation involving a liquid-liquid extraction, an adsorption or an ion-exchange
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G45/00—Compounds of manganese
- C01G45/02—Oxides; Hydroxides
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/50—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese
- H01M4/505—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D9/00—Crystallisation
- B01D2009/0086—Processes or apparatus therefor
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2002/00—Crystal-structural characteristics
- C01P2002/70—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data
- C01P2002/72—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data by d-values or two theta-values, e.g. as X-ray diagram
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/40—Electric properties
Definitions
- the present invention relates to a method of producing manganese sulfate monohydrate (MnSO 4 ⁇ H 2 O) from manganese-containing by-products generated during the zinc hydrometallurgical process, and in particular, at a level that can be used as a raw material for a positive electrode active material for lithium ion secondary batteries. It relates to a method of producing high purity manganese sulfate monohydrate (MnSO 4 ⁇ H 2 O).
- Lithium-ion secondary batteries are composed of a positive electrode, a negative electrode, a separator, and an electrolyte, and among these, manganese sulfate monohydrate is widely used to manufacture the positive electrode.
- the positive electrode active material is manufactured by calcination of a precursor and lithium, and in this case, manganese sulfate monohydrate is used as the main material of the precursor.
- manganese sulfate monohydrate was mainly manufactured through a method of performing a leaching process and a crystallization process on low-purity manganese ore or manganese-containing substances.
- manganese ore is mostly dependent on imports from specific countries such as China or India, and if the supply of manganese ore from the relevant country is not smooth, there is a problem in which the supply and demand of manganese sulfate monohydrate becomes difficult.
- the purpose of the present invention is to provide a method for producing manganese sulfate, particularly high-purity manganese sulfate monohydrate, from manganese-containing by-products generated during the zinc hydrometallurgical process.
- a method for producing manganese sulfate monohydrate includes a pulverizing and washing process for pulverizing and washing a manganese-containing by-product, and pulverizing the pulverized manganese-containing by-product after the pulverizing and washing process.
- a leaching process for leaching a neutralization process for neutralizing the leaching solution produced by the leaching process, an impurity removal process for removing impurities from the leaching solution neutralized by the neutralization process, and a process for removing impurities using a solvent extraction method.
- It may include a solvent extraction process for recovering manganese from the liquid in the form of an aqueous manganese sulfate solution, and a crystallization process for producing manganese sulfate monohydrate by evaporating and concentrating the aqueous manganese sulfate solution produced in the solvent extraction process.
- the average particle size of the pulverized manganese-containing by-product may be 1 to 25 ⁇ m.
- the manganese-containing by-product in the grinding and washing process, may be washed with water to remove water-soluble impurities.
- the amount of water introduced for washing may be 1.5 to 3 times the weight ratio of the manganese-containing by-product.
- the leaching process may be performed using an inorganic acid and a reducing agent.
- sulfuric acid may be used as the inorganic acid
- hydrogen peroxide may be used as the reducing agent
- the neutralization process may be performed using at least one of pulverized manganese-containing by-products, sodium hydroxide, calcium hydroxide, magnesium hydroxide, calcium oxide, and magnesium oxide.
- the impurity removal process may include a first impurity removal process for removing heavy metal impurities and a second impurity removal process for removing light metal impurities.
- the first impurity removal process may be performed through a precipitation reaction of heavy metal impurities by adding at least one of soda sulfide, soda hydride, ammonium hydrogen sulfide, hydrogen sulfide, and sodium sulfide as a precipitant. .
- the precipitant may be added at an equivalent ratio of 0.8 to 1.4 relative to the heavy metal contained in the neutralized leaching solution.
- the second impurity removal process may be performed through a precipitation reaction of light metal impurities by adding at least one of sodium fluoride, oxalic acid, and sodium oxalate as a precipitant.
- the precipitant may be added at an equivalent ratio of 1 to 2.5 relative to the light metal contained in the first impurity removal liquid.
- the solvent extraction process includes a loading process for extracting manganese contained in the process solution into an organic phase, a scrubbing process for washing the organic phase from which manganese has been extracted with water, and after the scrubbing process, the It may include a stripping process in which sulfuric acid is added to the organic phase to recover manganese in the form of an aqueous manganese sulfate solution.
- the cleaning liquid after the scrubbing process can be used to dilute the inorganic acid added in the leaching process.
- the crystallization process may be performed at a temperature of 60°C to 100°C.
- the manganese-containing by-product may include at least one of a manganese crust formed on the surface of the anode plate and a manganese slime formed on the bottom of the electrolyzer during the electrolysis process of the zinc hydrometallurgical process.
- manganese sulfate particularly high purity manganese sulfate monohydrate, can be produced from manganese-containing by-products generated in the zinc hydrometallurgical process.
- Manganese sulfate monohydrate according to the present invention can be suitably used as a raw material for a positive electrode active material for lithium secondary batteries.
- Figure 1 is a process diagram of a method for producing manganese sulfate monohydrate from manganese-containing by-products according to an embodiment of the present invention.
- Figure 2 is a process diagram for a solvent extraction process according to an embodiment of the present invention.
- Figure 3 is an XRD analysis graph of manganese sulfate monohydrate produced according to an embodiment of the present invention.
- Figure 1 is a process diagram of a method for producing manganese sulfate monohydrate from manganese-containing by-products according to an embodiment of the present invention.
- the method for producing manganese sulfate monohydrate from manganese-containing by-products includes a raw material preparation process (S100), grinding and washing process (S200), leaching process (S300), and neutralization process. (S400), an impurity removal process (S500), a solvent extraction process (S600), and a crystallization process (S700).
- manganese-containing by-products generated in the electrolysis process of the zinc hydrosmelting process can be prepared as manganese-containing raw materials for producing manganese sulfate monohydrate.
- the manganese-containing by-product may include at least one of the manganese crust formed on the surface of the positive electrode plate and the manganese slime formed on the bottom of the electrolytic cell during the electrolysis process of the zinc hydrometallurgical process.
- manganese may be contained in the form of manganese oxide (MnO 2 ).
- Manganese-containing by-products may contain impurities other than manganese (Mn).
- manganese-containing by-products may include calcium (Ca), potassium (K), lead (Pb), zinc (Zn), magnesium (Mg), sodium (Na), etc. as impurities, and their composition is shown in the table. It can be equal to 1.
- a grinding and washing process (S200) may be performed.
- a grinding process may be performed to reduce the particle size of the manganese-containing by-product, and a washing process may be performed to remove at least some of the impurities contained in the manganese-containing by-product.
- the average particle size of the manganese-containing by-product before the grinding process is performed may be about 700 to 900 ⁇ m, and may be lowered to about 1 to 25 ⁇ m by the grinding process. If the average particle size of the manganese-containing by-product is large, the reactivity is low, so leaching may be substantially difficult in the subsequent leaching process (S300). Accordingly, the leaching efficiency in the leaching process (S300) can be increased by lowering the average particle size of the manganese-containing by-product through a grinding process before performing the leaching process (S300). For example, the grinding process may be performed using a milling machine such as a ball mill or rod mill.
- the cleaning process may be performed simultaneously with the grinding process.
- the grinding process and the washing process can be performed simultaneously using a wet grinding machine, and then some of the impurities (Ca, K, Mg, Na, etc.) contained in the manganese-containing by-product can be removed by solid-liquid separation. there is.
- the grinding process and the cleaning process may be performed separately.
- the manganese-containing by-product in order to effectively remove impurities contained in the manganese-containing by-product, the manganese-containing by-product may be washed using about 1.5 to 3 times the amount of water by weight compared to the manganese-containing by-product.
- a leaching process (S300) may be performed.
- the pulverized manganese-containing by-product can be leached using an inorganic acid and a reducing agent.
- an inorganic acid and a reducing agent at least one of sulfuric acid (H 2 SO 4 ), hydrochloric acid (HCl), and nitric acid (HNO 3 ) can be used as the inorganic acid, and hydrogen peroxide (H 2 O 2 ), iron sulfate (FeSO 4 ), and At least one of oxalic acid (C 2 H 2 O 4 ) may be used.
- mineral acids diluted with water can be used.
- sulfuric acid and hydrogen peroxide can be used as an inorganic acid and a reducing agent, respectively.
- manganese is leached from the manganese-containing by-product in the form of manganese sulfate (MnSO 4 ) through the reaction equation below (Equation 1). A leaching solution may be formed.
- the leaching process (S300) can be performed at approximately 60-70°C.
- the sulfuric acid concentration of the leaching solution may be 25 to 35 g/L, and the pH may be 1 or less.
- the leaching process (S300) not only manganese but also other impurities may be leached.
- impurities such as calcium (Ca), potassium (K), lead (Pb), zinc (Zn), etc. may be leached together with manganese and included in the leaching solution.
- the manganese concentration of the leaching solution obtained in the leaching process (S300) may be about 60 to 130 g/L.
- about 1.5 to 3 times the amount of water by weight compared to the pulverized manganese-containing by-product can be used to dilute the inorganic acid.
- the cleaning solution from the scrubbing process (S620) of the solvent extraction process (S600), which will be described later can be used as water for diluting the inorganic acid.
- S620 scrubbing process of the solvent extraction process
- a neutralization process (S400) may be performed.
- a neutralizing agent may be added to raise the pH of the leaching solution generated in the leaching process (S300).
- the neutralizing agent includes at least one of pulverized manganese-containing by-products, sodium hydroxide (NaOH), calcium hydroxide (Ca(OH) 2 ), magnesium hydroxide (Mg(OH) 2 ), calcium oxide (CaO), and magnesium oxide (MgO).
- NaOH sodium hydroxide
- Ca(OH) 2 calcium hydroxide
- Mg(OH) 2 magnesium hydroxide
- CaO calcium oxide
- MgO magnesium oxide
- the amount of neutralizer separately added can be reduced, thereby reducing costs, and the concentration of manganese in the leaching solution can be increased.
- a reducing agent may be additionally added to dissolve valuable metals contained in the additionally added manganese-containing by-products.
- the same reducing agent as in the leaching reaction (S300) may be used.
- the pH of the neutralized leaching solution may be about 3 to 5, and preferably about 4 to 5.
- an impurity removal process may be performed to remove impurities in the neutralized leaching solution.
- the impurity removal process (S500) may include a first impurity removal process and a second impurity removal process.
- the first impurity removal process may be a heavy metal impurity removal process.
- a sulfide-based precipitant may be added to the neutralized leaching solution.
- soda sulfide (Na 2 S), sodium hydroxide (NaSH), ammonium hydrogen sulfide (NH 4 HS), hydrogen sulfide (H 2 S), and sodium sulfide (Na 2 S) may be used as a precipitant;
- heavy metal impurities such as zinc, lead, cadmium, cobalt, nickel, and copper can be removed.
- sodium hydroxide is used as a precipitant, the reaction equation is as follows (Equation 2).
- the first impurity removal process may be performed at about 60 to 80° C., and the precipitant may be added at an equivalent ratio of about 0.8 to 1.4 based on the heavy metal contained in the neutralized leaching solution.
- the contents of zinc, lead, cadmium, nickel, copper, and cobalt contained in the first impurity removal liquid may each be lowered to 5 mg/L or less.
- a second impurity removal process may be performed, and the second impurity removal process may be a light metal impurity removal process.
- a precipitant for precipitation of light metal impurities may be added to the first impurity removal liquid.
- at least one of sodium fluoride (NaF), oxalic acid (C 2 H 2 O 4 ), and sodium oxalate (Na 2 C 2 O 4 ) may be used as a precipitant, through which light metals such as calcium and magnesium are removed. It can be.
- the reaction equation when sodium fluoride (NaF) can be used as a precipitant is as follows (Equation 3).
- the second impurity removal process may be performed at about 70 to 90° C., and the precipitant may be added at an equivalent ratio of about 1 to 2.5 relative to the light metal contained in the first impurity removal solution.
- the contents of calcium and magnesium contained in the second impurity removal liquid may each be lowered to 50 mg/L or less.
- a solvent extraction process (S600) may be performed.
- manganese may be separated from the process solution (second impurity removal solution) after the impurity removal process (S500) using a solvent extraction method.
- the process solution after the impurity removal process (S500) may contain substances such as sodium and potassium in addition to manganese.
- manganese is selectively extracted in the form of an aqueous manganese sulfate solution using a solvent extraction method. It can be extracted.
- FIG. 2 is a process diagram for the solvent extraction process (S600) according to an embodiment of the present invention.
- the solvent extraction process (S600) may include a loading process (S610), a scrubbing process (S620), and a stripping process (S630).
- the loading process (S610) is a process of extracting manganese contained in the process solution into the organic phase after removing impurities using an organic extractant (organic solvent).
- organic extractant organic solvent
- at least one of Di-2-Ethylhexyl Phosphoric Acid, Mono-2-ethylhexyl (2-Ethylhexyl)phosphonate, and Bis (2,4,4-TRIMETHYLPENTYL) Phosphinic Acid can be used.
- the reaction temperature of the loading process (S610) may be about 30 to 50°C, and the pH may be about 4 to 5.
- the pH may be about 4 to 5.
- at least one of sodium hydroxide (NaOH), sodium carbonate (Na 2 CO 3 ), and sodium sulfate (Na 2 SO 4 ) may be used.
- the organic phase and the aqueous phase can be phase separated by the difference in specific gravity.
- the extraction filtrate (aqueous phase) from which the manganese is separated can be used as a process liquid for the grinding and washing process (S200), and the organic phase moves to the next solvent extraction process (i.e., scrubbing process (S620)).
- a scrubbing process may be performed on the organic phase from which manganese was extracted.
- the organic phase from which the manganese is extracted can be washed with water to remove impurities, including sodium and potassium, remaining in the organic phase. Through this, impurities contained in the organic phase can be removed, and high purity manganese can remain.
- the cleaning liquid after the scrubbing process (S620) can be used to dilute the inorganic acid in the leaching process (S300).
- a stripping process may be performed to recover the manganese extracted in the organic phase in the form of an aqueous manganese sulfate solution.
- diluted sulfuric acid is added to the organic phase from which impurities have been removed by the scrubbing process (S620), so that the manganese extracted from the organic phase can be recovered in the form of an aqueous solution of manganese sulfate (MnSO 4 ). .
- manganese sulfate monohydrate can be produced by evaporating and concentrating the manganese sulfate aqueous solution recovered in the solvent extraction process (S600).
- the process of evaporating and concentrating the aqueous solution of manganese sulfate may be performed at about 50°C to 120°C, and preferably at about 60°C to 100°C. If the temperature of the process of evaporating and concentrating the aqueous solution of manganese sulfate is lower than 50°C, a type of manganese sulfate hydrate other than manganese sulfate monohydrate may be produced. Specifically, when the temperature is 0°C to 10°C, manganese sulfate heptahydrate can be produced, and when the temperature is 10°C to 50°C, manganese sulfate tetrahydrate can be produced.
- Figure 3 is an XRD analysis graph of manganese sulfate monohydrate produced according to an embodiment of the present invention.
- the XRD peak (10) of manganese sulfate monohydrate produced according to an embodiment of the present invention and the XRD peak (20) of manganese sulfate monohydrate of JCPDS are shown. It can be confirmed that the main peaks of the XRD peak (10) of manganese sulfate monohydrate produced according to the results and the XRD peak (20) of manganese sulfate monohydrate of JCPDS are identical.
- Manganese sulfate monohydrate according to an embodiment of the present invention has a manganese content of 32.0 wt% or more, and the content of impurities may be as shown in Table 2 below.
- manganese sulfate monohydrate according to an embodiment of the present invention can be suitably used as a raw material for a cathode active material for a lithium secondary battery.
- a manganese-containing by-product generated in the electrolysis process of the zinc smelting process containing 40% manganese, 2.2% lead, 1.9% zinc, and 2.8% calcium is used as the raw material. It was used as a substance.
- the manganese-containing by-product was pulverized and washed to remove water-soluble impurities such as magnesium, sodium, and zinc. At this time, the removal rates of major impurities were 57% for magnesium, 53% for sodium, and 83% for zinc.
- the average particle size of the manganese-containing by-product before grinding was about 800 ⁇ m, and the average particle size after grinding for 1 hour was about 3.4 ⁇ m.
- manganese was extracted at 40°C using a 30% D2EHPA organic extractant. At this time, sodium hydroxide (NaOH) was added to maintain pH at 4.5. After extracting manganese into the organic phase, the content of manganese remaining in the water phase was 0.2 g/L.
- the manganese in the organic phase was washed with water at 40°C to remove impurities.
- the content of the major impurities removed was 30 mg/L of potassium, 1.0 mg/L of magnesium, and 350 mg/L of sodium.
- the recovered aqueous manganese sulfate solution was crystallized at 100°C to obtain manganese sulfate monohydrate (purity 32.0 wt%).
- the composition of manganese sulfate monohydrate was as shown in Table 3 below.
- the manganese-containing by-product was washed with an amount (1 time) of water equal to the amount of the manganese-containing by-product to remove impurities contained in the manganese-containing by-product.
- the removal rates of major impurities were 49% magnesium, 5% sodium, and 5% zinc.
- the removal rate of calcium, a major impurity was 52% when the equivalence ratio of sodium fluoride was 0.5 times, and 84% when the equivalence ratio of sodium fluoride was 3 times.
Abstract
Description
Mn | Ca | K | Pb | Zn | Ag | Na | Si |
30~45 | 0.1 ~3.5 | 0.1~3.5 | 0.1~4.0 | 0.1~4.0 | 0~0.05 | 0.05~0.3 | 0~0.05 |
Ca | K | Pb | Zn | Al | Cr | Cu | Fe | Mg | Na | Si |
≤100 | ≤120 | ≤10 | ≤10 | ≤20 | ≤10 | ≤5 | ≤10 | ≤150 | ≤150 | ≤100 |
Mn (wt%) |
Ca | K | Pb | Zn | Al | Fe | Mg | Na |
32.0 | 68.2 | 36.2 | 0.2 | 3.7 | 1.1 | 1.5 | 114.2 | 138.2 |
Claims (16)
- 망간 함유 부산물을 분쇄하고 세정하는 분쇄 및 세정 공정;상기 분쇄 및 세정 공정 후의 분쇄된 망간 함유 부산물을 침출하는 침출 공정;상기 침출 공정에 의해 생성된 침출 용액을 중화하는 중화 공정;상기 중화 공정에 의해 중화된 침출 용액으로부터 불순물을 제거하는 불순물 제거 공정;용매 추출법을 이용하여 상기 불순물 제거 공정을 거친 공정액으로부터 망간을 황산망간 수용액의 형태로 회수하는 용매 추출 공정; 및상기 용매 추출 공정에서 생성된 황산망간 수용액을 증발 및 농축하여 황산망간 일수화물을 생성하는 결정화 공정을 포함하는, 황산망간 일수화물을 제조하는 방법.
- 제1 항에 있어서,상기 분쇄된 망간 함유 부산물의 평균 입도는 1 내지 25μm인, 황산망간 일수화물을 제조하는 방법.
- 제1 항 또는 제2 항에 있어서,상기 분쇄 및 세정 공정에서, 상기 망간 함유 부산물을 물로 세정하여 수용성 불순물을 제거하는, 황산망간 일수화물을 제조하는 방법.
- 제3 항에 있어서,상기 분쇄 및 세정 공정에서, 세정을 위해 투입되는 물의 양은 중량비로 상기 망간 함유 부산물 대비 1.5 내지 3배인, 황산망간 일수화물을 제조하는 방법.
- 제1 항 또는 제2 항에 있어서,상기 침출 공정은 무기산 및 환원제를 이용하여 수행되는, 황산망간 일수화물을 제조하는 방법.
- 제5 항에 있어서,상기 침출 공정에서, 상기 무기산으로 황산이 사용되고, 상기 환원제로 과산화수소가 사용되는, 황산망간 일수화물을 제조하는 방법.
- 제1 항 또는 제2 항에 있어서,상기 중화 공정은 분쇄된 망간 함유 부산물, 수산화나트륨, 수산화칼슘, 수산화마그네슘, 산화칼슘, 및 산화마그네슘 중 적어도 하나를 사용하여 수행되는, 황산망간 일수화물을 제조하는 방법.
- 제1 항 또는 제2 항에 있어서,상기 불순물 제거 공정은 중금속류 불순물을 제거하기 위한 제1 불순물 제거 공정 및 경금속류 불순물을 제거하기 위한 제2 불순물 제거 공정을 포함하는, 황산망간 일수화물을 제조하는 방법.
- 제8 항에 있어서,상기 제1 불순물 제거 공정은 침전제로 유화소다, 수유화소다, 황화수소암모늄, 황화수소, 및 황화나트륨 중 적어도 하나를 투입하여 중금속류 불순물의 침전 반응을 통해 수행되는, 황산망간 일수화물을 제조하는 방법.
- 제9 항에 있어서,상기 침전제는 상기 중화된 침출 용액에 포함되어 있는 중금속 대비 0.8 내지 1.4의 당량비로 투입되는, 황산망간 일수화물을 제조하는 방법.
- 제8 항에 있어서,상기 제2 불순물 제거 공정은 침전제로 불화 나트륨, 옥살산, 옥살산 나트륨 중 적어도 하나를 투입하여 경금속류 불순물의 침전 반응을 통해 수행되는, 황산망간 일수화물을 제조하는 방법.
- 제11 항에 있어서,상기 침전제는 제1 불순물 제거액에 포함되어 있는 경금속 대비 1 내지 2.5의 당량비로 투입되는, 황산망간 일수화물을 제조하는 방법.
- 제1 항 또는 제2 항에 있어서,상기 용매 추출 공정은,상기 공정액에 포함되어 있는 망간을 유기상으로 추출하는 로딩 공정;망간이 추출된 상기 유기상을 물로 세정하는 스크러빙 공정; 및상기 스크러빙 공정 후 상기 유기상에 황산을 투입하여 망간을 황산망간 수용액의 형태로 회수하는 스트리핑 공정을 포함하는, 황산망간 일수화물을 제조하는 방법.
- 제13 항에 있어서,상기 스크러빙 공정 후의 세정액은 상기 침출 공정에서 투입되는 무기산의 희석을 위해 사용되는, 황산망간 일수화물을 제조하는 방법.
- 제1 항 또는 제2 항에 있어서,상기 결정화 공정은 60℃ 내지 100℃의 온도에서 수행되는, 황산망간 일수화물을 제조하는 방법.
- 제1 항 또는 제2 항에 있어서,상기 망간 함유 부산물은 아연 습식 제련 공정의 전해 공정 중 양극 판의 표면에 형성되는 망간 크러스트 및 전해조의 바닥에 형성되는 망간 슬라임 중 적어도 하나를 포함하는, 황산망간 일수화물을 제조하는 방법.
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KR20150050632A (ko) * | 2013-10-29 | 2015-05-11 | 주식회사 동부메탈 | 망간합금철 정련로와 전기로 부산물부터 고순도 황산망간일수화물의 제조방법 및 그 제조방법에 의해 제조된 고순도 황산망간일수화물 |
KR20150050630A (ko) * | 2013-10-29 | 2015-05-11 | 주식회사 동부메탈 | 망간합금철 정련로와 전기로 부산물부터 고순도 산화망가니즈의 제조방법 및 그 제조방법에 의해 제조된 고순도 산화망가니즈 |
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KR20210120669A (ko) * | 2020-03-27 | 2021-10-07 | 코스모화학 주식회사 | 폐양극활물질로부터 망간화합물의 회수방법 |
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