FIELD: inorganic chemistry. SUBSTANCE: in process which comprises dissolution the starting compounds and the reaction thereof in alcoholic solution, ammonium perrenate is dissolved in ammonia-ethanol solution, aqueous solutions of tetraethyl ammonium hydroxide and ammonium polysulfide are then successively added, and hydrogen sulfide is passed through the reaction mixture, the precipitate is filtered off and the mother solution is recycled to the process. The yield 96%. EFFECT: more efficient preparation process. 2 cl
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