Method for producing mixed metal salt
AssigneeJx Metals Circular Solutions Co., Ltd.
InventorsJunichi Arakawa, Kazunori Tajiri
Life of this patent
Estimating the term…
Abstract
A method for producing mixed metal salts containing manganese ions and at least one of cobalt ions and nickel ions, the method including: an Al removal step of subjecting an acidic solution containing at least manganese ions and aluminum ions, and at least one of cobalt ions and nickel ions, to removal of the aluminum ions by extracting the aluminum ions into a solvent, the acidic solution being obtained by subjecting battery powder of lithium ion batteries to a leaching step; and a precipitation step of neutralizing an extracted residual liquid obtained in the Al removal step under conditions where a pH is less than 10.0, to precipitate mixed metal salts comprising a metal salt of manganese and a metal salt of at least one of cobalt and nickel.
Claims6
A method for producing mixed metal salts comprising manganese ions and at least one of cobalt ions and nickel ions, the method comprising:
- an Al removal step of subjecting an acidic solution comprising at least manganese ions and aluminum ions, and at least one of cobalt ions and nickel ions, to removal of the aluminum ions by extracting the aluminum ions into a solvent, the acidic solution is obtained by subjecting battery powder of lithium ion batteries to a leaching step;
- and
- a precipitation step of neutralizing an extracted residual liquid obtained in the Al removal step under conditions where a pH is less than 10.0, to precipitate mixed metal salts comprising a metal salt of manganese and a metal salt of at least one of cobalt and nickel,
- wherein a metal extraction step of extracting and back-extracting at least one of cobalt, nickel and manganese is not carried out between the Al removal step and the precipitation step.
Dependencies are inferred from the claim text.