Cobalt recovery method

Cobalt is recovered with high purity from a liquid to be treated in which cobalt and impurity metals are dissolved. In the cobalt recovery method, the pH is adjusted to 4-7 (step S3) by adding a base to a liquid to be treated; a step (step S4) for solid-liquid separation of the precipitate of the cr...

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Hauptverfasser:	TAKEUCHI TAKAO, MIHO YOSHIAKI, HIRANO SATORU, ISHIDA KAZUHIKO, YOKOYAMA KAHO
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	BASIC ELECTRIC ELEMENTS CHEMISTRY DISPOSAL OF SOLID WASTE ELECTRICITY FERROUS OR NON-FERROUS ALLOYS METALLURGY PERFORMING OPERATIONS PRETREATMENT OF RAW MATERIALS PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY PRODUCTION AND REFINING OF METALS RECLAMATION OF CONTAMINED SOIL SOIL TRANSPORTING TREATMENT OF ALLOYS OR NON-FERROUS METALS
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creator	TAKEUCHI TAKAO MIHO YOSHIAKI HIRANO SATORU ISHIDA KAZUHIKO YOKOYAMA KAHO
description	Cobalt is recovered with high purity from a liquid to be treated in which cobalt and impurity metals are dissolved. In the cobalt recovery method, the pH is adjusted to 4-7 (step S3) by adding a base to a liquid to be treated; a step (step S4) for solid-liquid separation of the precipitate of the crystals of the salt containing the impurity metal precipitated in step S3; adjusting the pH to 7 or more by adding a base to the liquid to be treated after step S4 (step S5); a step (step S6) for solid-liquid separation of a precipitate containing the cobalt salt crystal precipitated in step S5; dissolving the precipitate after step S6 with an inorganic acid (step S7-1); adjusting the pH to 4-7 (step S7-2) by adding a base to the redissolved solution; a step (step S7-3) in which the precipitate of the crystals of the salt containing the impurity metal precipitated in the step S7-2 is precipitated by self weight or centrifugal separation and separated into a supernatant and a slurry containing the precipitate; adjust
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language	chi ; eng
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subjects	BASIC ELECTRIC ELEMENTS CHEMISTRY DISPOSAL OF SOLID WASTE ELECTRICITY FERROUS OR NON-FERROUS ALLOYS METALLURGY PERFORMING OPERATIONS PRETREATMENT OF RAW MATERIALS PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY PRODUCTION AND REFINING OF METALS RECLAMATION OF CONTAMINED SOIL SOIL TRANSPORTING TREATMENT OF ALLOYS OR NON-FERROUS METALS
title	Cobalt recovery method
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