Егор Назаров » Публикация

Аннотация The new conception of processing of nuclear fuel is offered now at leading scientific schools [1]. This conception includes uranium and plutonium extraction from the nuclear fuel in carbonate media with future extraction refining. One of the main problems is separation of target elements from the well soluble in carbonate solutions salts of radiogenic elements. One of them is cesium which carbonate has solubility up to 2.5 mol/L. We had studied the solvent extraction of cesium by mixture of dibenzo-18-crown-6 and by 4',4''(5'')-ditertbutyldicyclohexano-18-crown-6 with methyl-trialkylammonium carbonate (MTAA) in toluene from carbonate medias by method of isomolecular series. Also we had studied solvent extraction of cesium by solutions of 1,2-bis[o-(ethoxyhydroxyphosphoryl)phenoxy]ethane, 1,5-Bis[o-(ethoxyhydroxyphos-phoryl)phenoxy]-3-oxapentane and 1,8-Bis[o-(ethoxyhydroxyphosphoryl]-3,6-dioxa-octane in presence of the сation MTAA in toluene from carbonate medias. It has been fond that of solution in toluene of the 1,5-Bis[o-(ethoxyhydroxyphosphoryl)phenoxy]-3-oxapentane in presence of the MTAA cation is the best extracting system for cesium extraction from carbonate solutions. Stoichiometric of the extracted complexes and the isotherm of extraction of cesium by 1,5-Bis[o-(ethoxyhydroxyphosphoryl)phenoxy]-3-oxapentane in presence of the MTAA cation in toluene from carbonate media were obtained.