FIELD: chemistry of metalloorganic compounds, chemical technology.
SUBSTANCE: invention relates to the improved method for preparing cobalt (II) oxalate dihydrate. Method for preparing cobalt (II) oxalate dihydrate involves preparing reaction aqueous solution containing cobalt (II) and oxalate, crystallization of the end substance from solution, separation of precipitate from solution and drying a precipitate. For preparing the reaction aqueous solution method involves using cobalt-containing waste in production as a cobalt (II) source wherein waste of production represents the chemical cobalt plating spent solution. The mole ratio cobalt (II) : oxalate in the reaction aqueous solution = 1.0:(0.9-4.5), and pH value is from 0.0 to 8.0. Invention provides reducing material consumptions in preparing the end substance, retaining its purity and high yield, expanding assortment of cobalt-containing materials used in preparing cobalt (II) oxalate dihydrate, treatment of waste production from cobalt. Invention can be used for extraction of cobalt from waste production of cobalt covers. Prepared substance can be used as pigment, in preparing catalyst used in synthesis of inorganic and organic substances, in preparing metallic cobalt and its compounds.
EFFECT: improved preparing method.
12 cl, 12 ex
