CHEMICAL TECHNOLOGY DIVISION, CHEMICAL DEVELOPMENT SECTION C PROGRESS REPORT FOR OCTOBER-DECEMBER 1961

Author: Brown, K. B.
Published: United States : [publisher not identified], 1962.
[Oak Ridge, Tennessee] : [U.S. Atomic Energy Commission], 1962.
Physical Description: microopaque : positive ; 8 x 13 cm

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Summary

Recovery of Th (and U) from Granitic Rock. Recovery of Th by acid leaching ten addltlonal granite samples (36 to 82 ppm Th) from the Conway formation in N. H. ranged from about 50 to 85%, and averaged about 70%, Study of the effect of grind size on the recovery of Th from Conway and Plkes Peak granites showed no significant differences in the range minus 20 to minus 200 mesh. The Th concentration in a sized Conway granite sample was found to be much greater in the fine than in the coarse fractions, whereas Pikes Peak granite showed only slight Th enrichment in the finer fractions. U recoveries in acid leaching of four different granite samples were not improved by adding an oxidant. Collection and Analysis of Granite Samples. A field survey of the Conway granite formations in N. H. was made. Preliminary analysis of the data indicates that the accessible surface of the Conway granite averages at least 40 ppm Th. Collection and Analysis of Lateritic Soils. The Th concentration ranged 5 to 16 ppm in twenty-two samples of sub-lateritic soil from Miss., Ala., Ga., and Va. Final Cycle Pu Recovery by Amine Extraction. In continued batch countercurrent testing with simulated Purex 1BP solution of the proposed chemical flowsheet for final cycle Pu recovery by amine extraction, the extraction profile with the amine (TLA) concentration decreased from 0.3 to 0.15 M again confirmed the predicted extraction isotherm. The product solution contained 23 g Pu/liter (nominal x20 concentration factor), and the stripped organic and the raffinate contained, resp., 0.001 and <0.002 g/liter. Extraction and Separation of Zr and Hf. Results are summarized for tests on the extraction and separation of Zr and Hf with amines and organophosphorus esters and acids. All three extractant classes showed some promise but the studies were not sufficiently extensive to define complete processes. Separation of Rare Earths and Transplutoniums. Extraction of all lanthanides from concentrated LiCl and mixed LiCl-AlCl/sub 3/ solutions by various tertiary amines was greater than that of Y. Order of extractability and dif ferences from Y varied with composition of both organic and aqueous solutions. Sc varied widely in extractabllity with solution composition, being similar to Eu under some conditions and to Am under others. Amine extractions of rare earths from thiocyanate solutions were very small. Extraction of HNO/sub 3/ and Fe/sub 2/(SO/sub 4/)/sub 3/ from Purex 1WW Solution Approximately 90% of the nitrate and Fe and a major portion of the sulfate were extracted from synthetic Purex 1WW solution with a primary amine. This treatment produces a solution of low salt content which is highly amenable to solvent extraction recovery of Sr and possibly Cs. (auth)

Report Numbers

ORNL-TM-107

Other Subject(s)

Collection

U.S. Atomic Energy Commission depository collection.

Note

DOE contract number: W-7405-ENG-26
NSA number: NSA-16-011788
OSTI Identifier 4807308
Research organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States).

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