METHOD OF PRODUCING NICKEL (II) HYDROXIDE Russian patent published in 2012 - IPC C01G53/04 

FIELD: chemistry.

SUBSTANCE: invention can be used in chemical industry. The method of producing nickel (II) hydroxide involves treatment of an acidic solution of nickel (II) sulphate in two steps, at the first step with ammonia water to pH 4-4.5, at the second step with sodium hydroxide to pH 11-12. At the second step, the process is carried out by feeding the suspension from the first step into the sodium hydroxide solution. Further, impurities are washed off from the residue in an ascending stream with variable hydrodynamic conditions. The residue is then pressed and dried.

EFFECT: invention increases purity of the product and uniformity of its grain-size distribution.

3 cl, 3 tbl, 3 ex