REGENERATION BY LIQUID-LIQUID EXTRACTION OF ACIDS FROM AQUEOUS SOLUTION CONTAINING METALS

The invention concerns a method for regenerating hydrochloric and/or sulphuric acids from an aqueous solution containing metals, characterised in that it comprises the following successive steps which consist in: extracting the acid to be regenerated by contacting the aqueous solution containing met...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	PAREAU, DOMINIQUE, SCHNEIDER, HELENE, HITA, ALAIN, LAHITTE, CLAUDE, STAMBOULI, MONCEF, DURAND, GERARD
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	CHEMICAL SURFACE TREATMENT CHEMISTRY CLEANING OR DEGREASING OF METALLIC MATERIAL BY CHEMICALMETHODS OTHER THAN ELECTROLYSIS COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL DIFFUSION TREATMENT OF METALLIC MATERIAL INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL METALLURGY
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Beschreibung
Zusammenfassung:	The invention concerns a method for regenerating hydrochloric and/or sulphuric acids from an aqueous solution containing metals, characterised in that it comprises the following successive steps which consist in: extracting the acid to be regenerated by contacting the aqueous solution containing metals with an organic solvent, said organic solvent containing at least an amine and optionally at least an organic acid; separating the organic and aqueous phases; and extracting the acid to be regenerated by contacting the organic phase recovered at the preceding step with water.