THE UNIVERSAL SOLVENT EXTRACTION (UNEX) PROCESS. I. DEVELOPMENT OF THE UNEX PROCESS SOLVENT FOR THE SEPARATION OF CESIUM, STRONTIUM, AND THE ACTINIDES FROM ACIDIC RADIOACTIVE WASTE
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- 30 January 2001
- journal article
- Published by Informa UK Limited in Solvent Extraction and Ion Exchange
- Vol. 19 (1), 1-21
- https://doi.org/10.1081/sei-100001370
Abstract
A synergistic extraction mixture containing chlorinated cobalt dicarbollide (CCD), carbamoylmethyl phosphine oxide (CMPO), and polyethylene glycol (PEG) has been investigated for the simultaneous recovery of cesium, strontium, lanthanides, and actinides from highly acidic media. The extraction properties of this mixture depend on the concentration ratio of the components. For recovery of all major radionuclides, the optimal ratio of [CCD]:[PEG]: [CMPO] = 5:1:1 should be used. The use of diphenyl-N,N-dibutylcarbamoylmethyl phosphine oxide and PEG-400 provides the most efficient recovery of cesium, strontium, lanthanides, and actinides. The possibility of using polyfluorinated ethers, esters, ketones, and sulfones as diluents was examined. Phenyltrifluoromethyl sulfone was the most suitable diluent tested. The use of this diluent allows good extraction properties, chemical and radiation stability, excellent explosion/fire-safety properties, and favorable hydrodynamic characteristics. The extraction of radionuclides from HNO3 media by mixtures of CCD:PEG:CMPO in phenyltrifluoromethyl sulfone and the subsequent stripping behavior were evaluated.Keywords
This publication has 10 references indexed in Scilit:
- Development of a universal solvent for the decontamination of acidic liquid radioactive wastesCzechoslovak Journal of Physics, 1999
- Synergetic Extraction in Systems with Dicarbollide and Bidentate PhosphonateSeparation Science and Technology, 1994
- Extraction of cesium with derivatives of carborane into nitrobenzeneJournal of Radioanalytical and Nuclear Chemistry, 1991
- Extraction of fission products with 1,2-dichloroethane solutions of hexabromo derivative of cobalt dicarbollide from nitric acid mediumJournal of Radioanalytical and Nuclear Chemistry, 1991
- Extraction of alkali metals into nitrobenzene in the presence of univalent polyhedral borate anionsJournal of Inorganic and Nuclear Chemistry, 1976
- Synergistic effect of polyethylenglycols in extraction of alkaline earth cations by nitrobenzeneJournal of Inorganic and Nuclear Chemistry, 1976
- Preparation of aryl difluoromethyl ether, thioether and sulphone derivatives. Electronic properties of the difluoromethoxy, -methylthio and -methylsulphonyl substituents.Tetrahedron Letters, 1965
- Carbametallic Boron Hydride Derivatives. I. Apparent Analogs of Ferrocene and Ferricinium IonJournal of the American Chemical Society, 1965
- The Effect of Fluorine Substitution on the Electronic Properties of Alkoxy, Alkylthio and Alkylsulfonyl GroupsJournal of the American Chemical Society, 1963
- The Preparation of Aryl Difluoromethyl Ethers1The Journal of Organic Chemistry, 1960