Method of recovering metal from battery waste
OwnerVivek VERMA, Yi CAI +1inventors
InventorsVivek VERMA, Yi CAI, Madhavi SRINIVASAN
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Abstract
A method of recovering metal from battery waste is provided. The method includes providing a battery waste leachate comprising metal ions and sulphate ions in an acidic medium, contacting the battery waste leachate with a reagent comprising ammonium ions to precipitate the metal ions as a double sulphate salt having formula (NH4)2M(SO4)2·6H2O, wherein M is one or more of Ni, Mn and Co, heating the precipitate at a temperature of 400° C. or more to form an anhydrous precipitate, dissolving the anhydrous precipitate in a solution comprising sulphate ions and crystallizing MSO4·6H2O from the resultant solution.
Claims20
A method of recovering metal from battery waste, the method comprising providing a battery waste leachate comprising metal ions and sulphate ions in an acidic medium;
- contacting the battery waste leachate with a reagent comprising ammonium ions to precipitate the metal ions as a double sulphate salt having formula (NH4)2M(SO4)2·6H2O, wherein M is one or more of Ni, Mn and Co;
- heating the precipitate at a temperature of 400° C. or more to form an anhydrous precipitate;
- dissolving the anhydrous precipitate in a solution comprising sulphate ions;
- and
- crystallizing MSO4·6H2O from the resultant solution.
Dependencies are inferred from the claim text.