METHOD FOR EXTRACTING AND SEPARATING METALLIC ELEMENT

• Main Authors: YAMAMOTO SEIICHI, KITAGAWA KAZUO, MORITOKI MASATO
• Format: Patent
• Language: English
• Published: 08.01.1993
• Subjects: 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; PRETREATMENT OF RAW MATERIALS; PRODUCTION AND REFINING OF METALS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TREATMENT OF ALLOYS OR NON-FERROUS METALS

PURPOSE:To easily and efficiently extract and separate the contained metallic element in a continuous operation by decomposing and extracting a material to be treated in the coexistence of a solvent at high temp. and pressure, and then subjecting the solvent to ion exchange under high pressure. CONSTITUTION:A material 6 to be treated contg. chlorides of Sm and Gd, for example, is arranged in a vessel 5 kept at high temp. and pressure. A solvent 2 such as aq. NaOH is supplied to the vessel 5 from a liq. reservoir 1. An aq. soln. of alkali, acid, salt, etc., and water, etc., are used as the solvent. The vessel 5 is kept at 150 deg.C and 300atm and agitated, if necessary, by an agitator 7. Consequently, the material 6 is decomposed, and metallic elements such as Sm and Gd are extracted into the solvent 2. The solvent 2 is then passed through a ion-exchange column 8 to adsorb the Sm<3+>, Gd<3+>, etc., in the solvent 2 under high pressure or under high temp. and pressure. An eluent 4 such as an aq. EDTA soln. is supplied to the column 8 from a liq. reservoir 3, and the adsorbed Sm<3+>, Gd<3+>, etc., are decomposed, separated and recovered.