METHOD OF REGENERATING AND REUSING COBALT AND TUNGSTEN FROM REACTION WATERS (VERSIONS)

FIELD: waste disposal. SUBSTANCE: invention relates to processing of carboxylic acids' and other compounds' production waste. Reaction solutions are treated with alkali-earth metal hydroxide to precipitate cobalt and tungsten. Precipitate is successively treated with strong inorganic acid...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	ANDREA GARDANO, SAURO STROLOGO, MARKO FOA
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F FERROUS OR NON-FERROUS ALLOYS INORGANIC CHEMISTRY METALLURGY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL PRETREATMENT OF RAW MATERIALS PRODUCTION AND REFINING OF METALS THEIR RELEVANT APPARATUS TRANSPORTING TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	FIELD: waste disposal. SUBSTANCE: invention relates to processing of carboxylic acids' and other compounds' production waste. Reaction solutions are treated with alkali-earth metal hydroxide to precipitate cobalt and tungsten. Precipitate is successively treated with strong inorganic acid to form soluble cobalt salt. The latter is separated from tungstic acid precipitate. In another embodiment of invention, solution is treated with alkali metal hydroxide to precipitate and isolate cobaltous hydroxide. Alkali solution is then treated with alkali-earth metal compound to form alkali- earth metal tungstate, which is treated with strong inorganic acid to produce tungstic acid. EFFECT: enabled reuse of tungsten and cobalt. 19 cl, 4 ex