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- W83789623 abstract "S>A simplified procedure of operating the ion exchange columns for isolation of uranium-233 in the Thorex Pilot Plant was developed and tested on a laboratory scale. This procedure is based upon volume measurement instead of flowing stream analyses during elution. The essential features are upflow sorption and downflow elution at 70 C with a calculated volume of elutriant containing 3.0 M NH/sub 4/C/sub 2/H/sub 3/O/sub 2/, 1.5 M HC/sub 2/H/sub 3/O/sub 2/, and 0.75 M olumes of demineralized water. Countercurrent flow makes it possible to essentially eliminate acetate recycle through solvent extraction by leaving a small uranium heel on the resin instead of complete elution with large volumes of acetate tailings containing small amounts of uranium. The countercurrent operation also simplifies the procedure since the displacement volume is essentially constant for resin loadings for 25 to 80% of the theoretical capacity. The volume of produce can be calculated by dividing the grams of uranium loaded on the resin by the desired product concentration, for concentrations up to 200 g U/l. The acetate elutriant volume is slightiy less than the produce volume in order to minimize acetate in either the displacement or tailing cuts. Preliminary demonstration of this procedure using amore » column containing 73 ml of Dowex-50W cation exchange resin loaded to 65% capacity gave greater than 99% uranium recovery at 150 g/l, 99% recovery at 180 g/l, and 97% recovery at 200 g/l. When the resin loading was reduced to 30% capacity, 97% uranium was recovered in the product at a concentration of 143 g/l. Lower resin loadings would result in even lover recoveries and concentrations. (auth)« less" @default.
- W83789623 created "2016-06-24" @default.
- W83789623 creator A5086591785 @default.
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- W83789623 date "1955-12-15" @default.
- W83789623 modified "2023-09-23" @default.
- W83789623 title "INVESTIGATION OF COUNTERCURRENT ION EXCHANGE FOR ISOLATION OF URANIUM-233" @default.
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