Patent ID: 11873539
Assignee: HATCH LTD.
Field: Materials, metallurgy (Chemistry)
Classification: CPC C  Y | IPC C

Claim 18:
19. The process of claim 1, further comprising:
treating the ferronickel alloy with a pressure oxidation (POX) leach;
providing a discharge liquor from the oxidizing leach, the liquor comprising uncrystallised metal sulfate;
producing a nickel product by crystallizing the uncrystallised metal sulfate to form a crystallized nickel sulfate or a co-crystallized nickel and cobalt sulfate in a mother liquor;
separating the crystallized nickel sulfate or co-crystallized nickel and cobalt sulfate from the mother liquor, the mother liquor comprising a remaining uncrystallised metal sulfate;
basifying a portion of the mother liquor to convert the remaining uncrystallised metal sulfate to a basic metal salt, and
using the basic metal salt upstream of crystallizing the metal sulfate.