CHEMISTRY SEMI-ANNUAL SUMMARY RESEARCH REPORT FOR JULY-DECEMBER 1958
S>Phyical and Inorganic Chemistry. Pilot plant operations in separation of rare earths using EDTA and HEDTA are reported. Investigation continued on beta , beta diaminodiethylether-N,N,N,N-tetraacetic acid as rare earth eluant. Distillation of Sc and Y is described, and purification by filtering rare earth metals slightly above their melting points through a W filter is reported. Melting point data are given for Sc, Gd, Lu, YbCl/sub 3/, SmCl/sub 3/, and CeCl/sub 3/; the heat capacity of Tl and CrBr/sub 3/ is discussed. Phase studies of La-B, La-Y, Dy- Ta, Tm- Ta, Ni-Y, and Cu-Y were made. The work on acid-base reactions and on the lower oxidation states of Sb continued. The study of relaxation phenomena in the electrical double layer and of the chemical properties of carbon surfaces continued. A study of Cr isotope abundance in chromite ores is discussed. The study of the Y-H/sub 2/O (g) reaction is nearly complete. A mass spectrometric study of stannane is described. Pyrometallurgy. Research continued on Pu extraction from U by molten metal with studies using Ag and MgAg. Data are given on the distribution of Pu between V and La. Analytical Chemistry. Work continued on O/sub 2/ determination by high- temperature KBrF/sub 4/ fluorination. The KBrF/sub 4/ method for O/sub 2/ in Y samples was compared with the spectrographic and inert gas fusion methods. Other methods studied are: Nb in presence of Ta by extraction and spectrophotometry, rare earths in Th by ion exchange and spectrophotometry, U by solvent extraction with organophosphorus compounds, U by EDTA titration, Th by photometric titration with EDTA, alcohols and phenols by quantitative acetylation, aliphatic thiols by titration in acetone with Hg/sup 2+/ solution. Spectrochemistry. Studies are reported on: determination of Gd in Y matrices at high sensitivity, O in V metal, and O in YF/sub 3/. Radiochemistry. Formation of CdI/sub 2/ complexes was studied by extraction into iso-amyl alcohol. Activation analysis of V for C and N using the synchrotron and of Pt for Ir are described. Synthesis procedures for cis -STAPt(NH/sub 3/)/sub 2/Cl/sub 2/! were improved, and the program for computation of the 4 equilibrium constants for successive replacement of chloride ligands in STAPtCl/sub 4/!/sup 2-/ by bromide was improved. The decay of Sb/sup 127/ was studied. X-ray Chemistry. The structure of M M'-dibromobenzoyl- methane was recalculated. (For preceding period see ISC-1049.) (T.R.H.)
- Research Organization:
- Ames Lab., Ames, IA (United States)
- DOE Contract Number:
- W-7405-ENG-82
- NSA Number:
- NSA-13-018894
- OSTI ID:
- 4226045
- Report Number(s):
- ISC-1116
- Resource Relation:
- Other Information: Orig. Receipt Date: 31-DEC-59
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ACETIC ACID- AMINES- EDTA- ETHERS- ETHYL RADICALS- HEDTA- RARE EARTHS- SEPARATION PROCESSES- SOLVENT EXTRACTION
ACIDITY- ANTIMONY COMPOUNDS- CHEMICAL REACTIONS- VALENCE
CARBON- CHEMICAL REACTIONS- ELECTRIC CONDUCTIVITY- LAYERS- RELAXATION- SURFACES
CERIUM CHLORIDES- GADOLINIUM- LUTETIUM- MELTING POINTS- SAMARIUM CHLORIDES- SCANDIUM- YTTERBIUM CHLORIDES
CHEMICAL REACTIONS- REACTION KINETICS- WATER- YTTRIUM
CHROMIUM BROMIDES- SPECIFIC HEAT- THALLIUM
COPPER ALLOYS- PHASE DIAGRAMS- YTTRIUM ALLOYS
DISTILLATION- FILTERS- IMPURITIES- RARE EARTHS- REFINING- SCANDIUM- TUNGSTEN- YTTRIUM
DISTRIBUTION- LANTHAN