METHOD OF METAL RECOVERY
A method by which tantalum compounds and niobium compounds dissolved in water such as a liquid detergent are insolubilized and recovered. An aqueous solution containing tantalum compounds and/or niobium compounds dissolved therein is regulated so as to have a pH and an oxidation-reduction potential...
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Main Authors | , |
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Format | Patent |
Language | English French Japanese |
Published |
11.12.2003
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Edition | 7 |
Subjects | |
Online Access | Get full text |
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Abstract | A method by which tantalum compounds and niobium compounds dissolved in water such as a liquid detergent are insolubilized and recovered. An aqueous solution containing tantalum compounds and/or niobium compounds dissolved therein is regulated so as to have a pH and an oxidation-reduction potential E which satisfy E<60x(10-pH) to thereby insolubilize the tantalum compounds and/or niobium compounds. The tantalum compounds and/or niobium compounds thus insolubilized are recovered through a membrane treatment. Thus, the metal compounds can be more effectively recovered. This method is especially suitable for use in the treatment of a wastewater generated in the production of a tantalum powder or niobium powder through the reduction of a raw tantalum compound and/or raw niobium compound in a diluting salt.
L'invention concerne un procédé permettant de récupérer des composés à base de tantale et des composés à base de niobium dissous dans l'eau, tels que des détergents liquides, consistant à les rendre insolubles et à les récupérer. Le procédé consiste à réguler une solution aqueuse contenant des composés à base de tantale et/ou des composés à base de niobium dissous dans la solution afin d'obtenir un pH et un potentiel d'oxydoréduction satisfaisant la formule E<60X(10-pH) pour rendre les composés à base de tantale et/ou les composés à base de niobium insolubles. Les composés à base de tantale et/ou de niobium sont ensuite récupérés par traitement sur membrane. Ainsi, les composés métalliques peuvent être récupérés plus efficacement. Ce procédé est destiné à être utilisé tout particulièrement dans le traitement des eaux usées générées dans la production d'une poudre de tantale ou d'une poudre de niobium par réduction d'un composé à base de tantale brut et/ou d'un composé à base de niobium brut dans un sel diluant. |
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AbstractList | A method by which tantalum compounds and niobium compounds dissolved in water such as a liquid detergent are insolubilized and recovered. An aqueous solution containing tantalum compounds and/or niobium compounds dissolved therein is regulated so as to have a pH and an oxidation-reduction potential E which satisfy E<60x(10-pH) to thereby insolubilize the tantalum compounds and/or niobium compounds. The tantalum compounds and/or niobium compounds thus insolubilized are recovered through a membrane treatment. Thus, the metal compounds can be more effectively recovered. This method is especially suitable for use in the treatment of a wastewater generated in the production of a tantalum powder or niobium powder through the reduction of a raw tantalum compound and/or raw niobium compound in a diluting salt.
L'invention concerne un procédé permettant de récupérer des composés à base de tantale et des composés à base de niobium dissous dans l'eau, tels que des détergents liquides, consistant à les rendre insolubles et à les récupérer. Le procédé consiste à réguler une solution aqueuse contenant des composés à base de tantale et/ou des composés à base de niobium dissous dans la solution afin d'obtenir un pH et un potentiel d'oxydoréduction satisfaisant la formule E<60X(10-pH) pour rendre les composés à base de tantale et/ou les composés à base de niobium insolubles. Les composés à base de tantale et/ou de niobium sont ensuite récupérés par traitement sur membrane. Ainsi, les composés métalliques peuvent être récupérés plus efficacement. Ce procédé est destiné à être utilisé tout particulièrement dans le traitement des eaux usées générées dans la production d'une poudre de tantale ou d'une poudre de niobium par réduction d'un composé à base de tantale brut et/ou d'un composé à base de niobium brut dans un sel diluant. |
Author | MORIYA, NORIO MATSUKAWA, HISASHI |
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DocumentTitleAlternate | PROCEDE DE RECUPERATION DE METAUX |
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RelatedCompanies | CABOT SUPERMETALS K.K MORIYA, NORIO MATSUKAWA, HISASHI |
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Snippet | A method by which tantalum compounds and niobium compounds dissolved in water such as a liquid detergent are insolubilized and recovered. An aqueous solution... |
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SubjectTerms | CHEMISTRY CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS FERROUS OR NON-FERROUS ALLOYS GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS METALLURGY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL PRETREATMENT OF RAW MATERIALS PRODUCTION AND REFINING OF METALS SEPARATION TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE TRANSPORTING TREATMENT OF ALLOYS OR NON-FERROUS METALS TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE |
Title | METHOD OF METAL RECOVERY |
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