NICKEL(II) HYDROXIDE PRODUCTION PROCESS Russian patent published in 2002 - IPC

FIELD: inorganic compounds technology. SUBSTANCE: process for production of nickel(II) hydroxide suitable for manufacture of alkali accumulators involves preparation of solution containing nickel ions and acid residue, interaction of resulting solution with alkali metal hydroxide, separating formed precipitate and imparting it commercial quality. Starting solution is prepared via interaction of aqueous hydrochloric acid, nickel sulfide, and oxidant. Concentration of alkali metal in reaction mixture after the end of reaction ranges from 4 to 10 g/l. Product is dried until moisture content attains 20-25%. EFFECT: increased yield of valid product and reduced operational expenses.