FIELD: chemistry.
SUBSTANCE: invention can be used to obtain dodecahydrate aluminium-ammonium sulphate and to treat production wastes - spent solutions from etching printed circuit boards and spent solutions from electrolytic oxidation of aluminium. The target product is obtained by crystallisation from the reaction water solution, containing aluminium (III), ammonium sulphate. The reagents used in preparing the solution are aluminium metal and wastes from radioelectronic production - spent solution from etching printed circuit boards. The invention allows for obtaining pure crystalline dodecahydrate aluminium (III)-ammonium sulphate with 98% output, recycling of toxic wastes, reduce expenses on environment conservation and reduce the cost price of the target product.
EFFECT: obtaining pure crystalline dodecahydrate aluminium (III)-ammonium with 98% output, recycling of toxic wastes, reduction of cost price of target product.
15 cl, 6 ex
