DE-SILICONISING OF ACID SOLUTIONS

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FIELD : metallurgy. SUBSTANCE : invention relates to hydrometallurgy of nonferrous and rare metals and can be used at preparation of extraction and sorption withdrawal and separation of element at removal of silicon-containing elements from acid solutions. Proposed method comprises processing of said acid solution at their mixing with flocculant, a sodium methyl siliconate, and separation of formed product. Processing is performed at addition of isopropyl alcohol in amount of 0.5-2.5% relative to volume of processed solution. Sodium methyl siliconate aqueous solution is added in amount of 0.7-1.5 vol. % of initial solution volume. Initial solutions are processed at 40-60°C. EFFECT : de-siliconising to magnitudes smaller than 0, 1 g/dm3 of SiO2. 3 cl, 10 ex