METHOD FOR SOLVENT EXTRACTION OF TRANSURANIUM ELEMENTS

PURPOSE:To suppress extraction of Zr and Mo and to extract actionids of high purity efficiently by a method wherein a waste liquid to which a carboxylic acid having a chelate forming action is added is added to a solvent containing TBP and CMPO. CONSTITUTION:High-level waste liquid 1 to which a carb...

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Bibliographische Detailangaben
Hauptverfasser:	KIMURO HARUMI, YAMASHITA MASATADA
Format:	Patent
Sprache:	eng
Schlagworte:	CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATERTREATMENT OR WASTE MANAGEMENT DECONTAMINATION ARRANGEMENTS THEREFOR GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS NUCLEAR ENGINEERING NUCLEAR PHYSICS NUCLEAR REACTORS PHYSICS PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULARRADIATION OR PARTICLE BOMBARDMENT TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE TREATING RADIOACTIVELY CONTAMINATED MATERIAL
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Beschreibung
Zusammenfassung:	PURPOSE:To suppress extraction of Zr and Mo and to extract actionids of high purity efficiently by a method wherein a waste liquid to which a carboxylic acid having a chelate forming action is added is added to a solvent containing TBP and CMPO. CONSTITUTION:High-level waste liquid 1 to which a carboxylic acid is added and a solvent 2 containing TBP and CMPO are made to flow into a mixing vessel 12 oppositely and mixed by an agitator 11 and a mixed solution 3 thus obtained is introduced into a vessel 14 standing still through a duct 13. The mixed solution 3 is separated into an organic layer O and a water layer A by letting it stand still. The organic layer O is collected and reduced, since it contains actionids (U, Am, Cm, Pu, Np, etc.) of high purity. The water layer A is led to a vitrification device or the like through an outflow passage 16a of an adjustment vessel 16 and disposed of as liquid waste, since it contains Zr, Mo, etc., to be impurities. As for the carboxylic acid, any one of a malic acid, sulfosalicylic acid, sulfamic acid, dilute hydrochloic acid, formic acid, glycolic acid, malonic acid and succinic acid or their mixture is used.