METHOD FOR PRODUCING HIGH-PURE HYDRATED NICKEL SULFATE Russian patent published in 2023 - IPC C01G53/10 C22B23/00 C22B3/26 B01D11/04 B01D9/02 

FIELD: chemicals.

SUBSTANCE: inventions relate to methods for producing high-purity hydrated nickel sulphate. NiSO₄⋅6H₂O crystals are recovered from the nickel-enriched organic phase. Nickel is extracted with a solvent to form a nickel-rich organic phase, then it is brought into contact with an aqueous separating solution with a concentration of H₂SO₄ sufficient to extract nickel from the organic phase, and with a concentration of Ni²⁺ sufficient to precipitate NiSO₄⋅6H₂O crystals and form a nickel-depleted organic phase. A method is also proposed for obtaining nickel sulphate, including previous stages of processing, such as low-temperature oxidation under pressure in an autoclave of nickel sulphide concentrate

EFFECT: obtaining a productive leaching solution, extraction of cobalt from a productive leaching solution.

15 cl, 9 dwg, 19 tbl, 10 ex