| 摘要 |
1,264,921. Separating uranium and plutonium electrolytically. GES FUER KERNFORSCHUN G.m.b.H. 2 Feb., 1970 [5 Feb., 1969], No. 4818/70. Heading B1F. [Also in Divisions C7 and G6] U and Pu contained in the organic and/or aqueous phase, e.g. uranyl and tetravalent Pu nitrate dissolved in tributyl phosphate and alkane and mixed with diluted nitric acid, are separated by liquid-liquid extraction with the Pu being electrolytically reduced to the trivalent state during extraction in the region of thorough mixing, and transferred into the aqueous phase. Hexavalent U may be simultaneously reduced to the tetravalent state. Reduction may be effected by electrodes installed directly in the extraction apparatus, e.g. a multi-stage mixer-settler with the cathode arranged in the mixer region, and the anode arranged in the settler region in a diaphragm closed at its bottom end and extending into the aqueous phase. The cathode may be of Au foil or coatng, Ti, Ta, Nb, C or graphite; the anode may be a Pt coated Ti, Ta or Nb wire with helical lower end. The diphragm may be a clay pipe made impermeable in the region of the organic phase by S impregnation or a glass or ceramic coating. |
