Process of materials recovery from energy storage devices, wherein the process comprises cleaning, washing, deep discharging and then crushing the devices to recover floating non-magnetic materials and magnetic materials. Further the black mass is treated with baking process, water soaking process, gravity filtration process, leaching process, Cobalt salt recovery process, Manganese salt recovery process, Nickel salt recovery process, Sodium salt recovery process, Lithium salt recovery process and then selective absorption of respective ions using Ion-exchange resin and liquid-liquid extraction using organic solvent for beneficiation to recover pure Cobalt ions, Manganese ions, Nickel ions and Lithium ions. Further the process of the present invention facilitates in recovering all possible battery grade materials from used energy storage devices. The process of the present invention uses less water, energy, economical, safe, environment friendly without generating any hazardous gases while the process has very low carbon foot prints.

Process of materials recovery from energy storage devices, wherein the process comprises cleaning, washing, deep discharging and then crushing the devices to recover floating non-magnetic materials and magnetic materials. Further the black mass is treated with baking process, water soaking process, gravity filtration process, leaching process, Cobalt salt recovery process, Manganese salt recovery process, Nickel salt recovery process, Sodium salt recovery process, Lithium salt recovery process and then selective absorption of respective ions using Ion-exchange resin and liquid-liquid extraction using organic solvent for beneficiation to recover pure Cobalt ions, Manganese ions, Nickel ions and Lithium ions. Further the process of the present invention facilitates in recovering all possible battery grade materials from used energy storage devices. The process of the present invention uses less water, energy, economical, safe, environment friendly without generating any hazardous gases while the process has very low carbon foot prints.

A method for producing a mixed metal solution 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 while leaving at least a part of the manganese ions in the acidic solution in an aqueous phase, the acidic solution being obtained by subjecting battery powder of lithium ion batteries to a leaching step; and a metal extraction step of bringing an extracted residual liquid obtained in the Al removal step to an equilibrium pH of 6.5 to 7.5 using a solvent containing a carboxylic acid-based extracting agent, extracting at least one of the manganese ions and at least one of the cobalt ions and the nickel ions into the solvent, and then back-extracting the manganese ions and at least one of the cobalt ions and nickel ions.

A method for producing a mixed metal solution 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 while leaving at least a part of the manganese ions in the acidic solution in an aqueous phase, the acidic solution being obtained by subjecting battery powder of lithium ion batteries to a leaching step; and a metal extraction step of bringing an extracted residual liquid obtained in the Al removal step to an equilibrium pH of 6.5 to 7.5 using a solvent containing a carboxylic acid-based extracting agent, extracting at least one of the manganese ions and at least one of the cobalt ions and the nickel ions into the solvent, and then back-extracting the manganese ions and at least one of the cobalt ions and nickel ions.

The present invention relates to a process for the purification of Manganese sulfate monohydrate (1). The present invention also specifically relates to a cost-effective process for the preparation of pharmaceutical grade Manganese sulfate monohydrate (1) having purity greater than 99.9998% (w/w).

Provided is a method for producing a lithium-containing solution that allows suppressing production cost for lithium production by increasing a lithium content rate in a solution after an eluting step, and suppressing amount of a solution used in a process after the eluting step. The method for producing a lithium-containing solution includes an adsorption step, an eluting step of bringing post-adsorption lithium manganese oxide into contact with an acid-containing solution to obtain an eluted solution, and a manganese oxidation step performed in this order. The eluted solution is separated into a high concentration lithium-eluted solution and a low concentration lithium-eluted solution. The acid-containing solution includes a solution prepared by adding acid to the low concentration lithium-eluted solution. With this aspect, since only the low concentration lithium-eluted solution is added to the acid-containing solution, a hydrogen ion concentration in the acid-containing solution can be increased by adding just a small amount of acid, which consequently allows suppressing amount of the acid-containing solution and allows suppressing amount of the eluted solution used in the manganese oxidation step.

Provided is a method for producing a lithium-containing solution that allows suppressing production cost for lithium production by increasing a lithium content rate in a solution after an eluting step, and suppressing amount of a solution used in a process after the eluting step. The method for producing a lithium-containing solution includes an adsorption step, an eluting step of bringing post-adsorption lithium manganese oxide into contact with an acid-containing solution to obtain an eluted solution, and a manganese oxidation step performed in this order. The eluted solution is separated into a high concentration lithium-eluted solution and a low concentration lithium-eluted solution. The acid-containing solution includes a solution prepared by adding acid to the low concentration lithium-eluted solution. With this aspect, since only the low concentration lithium-eluted solution is added to the acid-containing solution, a hydrogen ion concentration in the acid-containing solution can be increased by adding just a small amount of acid, which consequently allows suppressing amount of the acid-containing solution and allows suppressing amount of the eluted solution used in the manganese oxidation step.