FIELD: process engineering.
SUBSTANCE: invention relates to tellurium extraction from wastes resulted from production of zinc or cadmium telluride. Proposed method comprises decomposition of wastes in sodium or potassium hydroxide melt and cooling the latter. Cooled melt is dissolved in water solution of ammonium. After dissolution, solution is filtered to produce pure tellurium precipitate.
EFFECT: simplified production process.
4 ex
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