FIELD: processing of waste of coke production. SUBSTANCE: hydrochloric acid or sulfuric acid is added into liquid waste, the process is carried out till pH is 3-4. Precipitate is separated, filtrate is treated by 60-80 % solution of tributyl phosphate being saturated by hydrogen chloride acid or by sulfuric acid. pH is maintained within 1.5-3.5 range, optimal pH being 2.8-3.3. Duration of the treatment is 1-30 s, optimal duration being 2-5 s. Organic phase is separated and is treated by ammonium hydroxide or by sodium hydroxide, the process takes place at pH 1.5-2.5. Thus prepared aqueous phase comprises thiocyanate of ammonium, or sodium, or potassium. EFFECT: improved efficiency of the method. 4 cl
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