INVESTIGATION OF CHEMICAL VAPOR DEPOSITION OF BERYLLIUM FROM ORGANOBERYLLIUM COMPOUNDS. Final Report, June 1963-January 1964

1965

Abstract

because of the limited solubility of the cesiumSantophen-1 complex in the diluent, the utility of this phenol in ore processing is questionable. Separation of Alkali Metals. The extraction and separation of alkali metals from nitrate solutions was studied with several different types of extractants, including substituted phenols, alkylphosphoric acids, sulfonic acids, carboxylic acids, and mixtures of some of these. With all of these reagents, cesium was extracted more strongly than rubidium, which in turn was extracted more strongly than the other alkali metals. Separation factors were higher with the phenols than with the other extractants. Acid Recovery by Amine Extraction. Preliminary tests showed the potential usefulness of tertiary amines for recovering and purifying phosphoric acid from the highly contaminated wet-process acid produced in the fertilizer industry. Water stripping of the amine solvent yielded a product that was more than 1.5 M in H/ sub 2/PO/sub 6/ and was almost free of iron and aluminum. Final-Cycle Plutonium Recovery by Amine Extraction. Batch equilibration tests with both aged and fresh samples of Purex-plant 1BP solution showed that the aged but not the fresh samples contained a considerable quantity of zirconium-niobium species highly extractable by the hydrocarbon diluents used with amines and other extractants. The amounts of zirconium-niobium extractable from the aged solution were sufficient to account for the low decontamination previously obtained when aged plant 1BP solution was used to continuous countercurrent testing of the plutonium- recovery flowsheets. Individual and batch cascade tests with the fresh plant solution showed separation and decontamination factors high enough for use in the projected process. Extraction of Lanthanides and Transplutoniums by Dialkylphosphoric Acids. The behavior of americium and curium relative to the lanthanides in extraction by di(2-ethylhexyl)phosphoric acid (HDEHP) from carboxylic acids was shifted from the behavior in extractions from mineral acids, where americium is similar to promethium. The shift was greatest in extractions from oxydiacetic acid, where cerium was 4 times as extractable as americium, while differences within the element groups were very small. Extractions from nitric acid were increased by adding glycine (aminoacetic acid). Extractions were greatly reduced by adding a phenol to HDEHP. Ditridecylphosphoric acid (HDTDP) was a stronger extractant than HDEHP and gave smaller differences beplease delete the above abstract 1799-

Abstract

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