METHOD FOR EXTRACTION OF LITHIUM AND TRANSITION METAL, USING HEATING Russian patent published in 2023 - IPC C22B7/00 C22B3/06 C22B26/12 C22B23/00 C22B47/00 

FIELD: extraction.

SUBSTANCE: invention relates to a method for extraction of transition metals from spent lithium-ionic batteries containing nickel. Lithium-containing material based on oxide of the specified transition metals is heated to a temperature from 400 to 900°C. Lithium-containing material based on oxide of the specified transition metals is material, a source of which is lithium-ionic batteries or parts of lithium-ionic batteries. The resulting thermally processed material is processed with water in CO₂ atmosphere at pressure of 10-50 bar, after which it is processed with acid selected from sulfuric acid, hydrochloric acid, nitric acid, methane sulfonic acid, oxalic acid, and citric acid. pH values from 2.5 to 7.5 are established, and Al, Cu, Fe, Zn compounds or combinations of at least two above-mentioned compounds are removed from a solution or a suspension obtained at the stage of establishment of pH value.

EFFECT: method allows for extraction of nickel, cobalt, and manganese with high yield and low level of impurities in such a form, in which they can be easily converted into cathode active materials.

12 cl, 1 ex