METHOD OF PRODUCING AQUEOUS SOLUTION OF NICKEL SULPHATE FROM NICKEL-CONTAINING RAW MATERIAL Russian patent published in 2025 - IPC C01G53/10 C22B23/00 C22B1/00 C22B3/04 C22B3/26 C22B3/44 B01D11/00 

FIELD: chemistry.

SUBSTANCE: invention relates to production of aqueous solution of nickel sulphate from nickel-containing raw material. Method includes reducing heat treatment of the first raw material containing nickel and lithium, further leaching of thermally treated product. Annealing of the second raw material containing nickel and sulphur is performed. Leaching residue obtained as a result of the first leaching process and the roasting product of the second raw material are leached. Second leaching product obtained as a result of the second leaching process is neutralized, and extraction with solvents with refining of nickel in neutralized solution obtained as a result of neutralization process.

EFFECT: method enables to extract nickel of high purity from nickel-containing complex materials.

29 cl, 3 dwg, 6 tbl