Title:
MANGANESE REMOVAL METHOD FOR VALUABLE METAL SALT AQUEOUS SOLUTION
Document Type and Number:
Japanese Patent JP2022190693
Kind Code:
A
Abstract:
To provide a manganese removal method for a valuable metal salt aqueous solution capable of sufficiently reducing a concentration of manganese contained in the valuable metal salt aqueous solution.SOLUTION: A removal method for manganese from an aqueous solution of a valuable metal salt removes manganese from an aqueous solution of a valuable metal salt as an extraction residue after solvent extraction of manganese was performed from a solution of a valuable metal obtained by dissolving a battery powder in an acid solution. An additive solution containing an alkali metal hydroxide and sodium hypochlorite at a molar ratio in the range of 0.2 to 2.0:1.0 is added to the aqueous solution of the valuable metal salt, and the aqueous solution after addition is adjusted so that the ORP falls in the range of 1050 to 1250 mV when a silver-silver chloride electrode is used as a reference electrode and simultaneously the pH is adjusted in the range of 1.8 to 6.5 to precipitate and remove manganese compounds.SELECTED DRAWING: None
Inventors:
KUROTAKI MASAYUKI
NAKAZAWA JUN
NAKAZAWA JUN
Application Number:
JP2022095236A
Publication Date:
December 26, 2022
Filing Date:
June 13, 2022
Export Citation:
Assignee:
ASAKA RIKEN KK
International Classes:
C22B3/44; C22B7/00; H01M10/54
Attorney, Agent or Firm:
Creation International Patent Office
Previous Patent: JPWO2022190692
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