FIELD: chemistry.
SUBSTANCE: invention can be applied in inorganic chemistry. Method of cadmium nitrate purification includes dissolution of crystalline cadmium nitrate in distilled water and addition with mixing of water solution of sodium hydroxide, taken in quantity, which constitutes 4.4-6.0% of stoichiometrically necessary for total sedimentation of cadmium hydroxide, to obtained cadmium nitrate solution. After that, formed sediment of cadmium hydroxide is filtered, and water solution of cadmium nitrate is additionally processed with nitric acid to pH 2, then evaporated and subjected to crystallisation at pH 2 and separated by centrifuging.
EFFECT: invention makes it possible to obtain cadmium nitrate of high degree of purity, which contains admixtures of metals at the level 10-5 -10-6 wt %.
2 cl, 1 tbl, 5 ex
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