SEMI-ANNUAL SUMMARY RESEARCH REPORT IN CHEMISTRY FOR JANUARY-JUNE 1958. SEPT 15, 1958
ABS>Physical and Inorganic Chemistry. The order of elution of rare earth and common elements with EDTA, HEDTA, and citric acid was established. Neodymium-praseodymium mixtures have been successfully separated using 0.026 M ammonium nitrilotriacetate at pH's of 6.0 and 9.0, 0.0l6 M ammonium diaminodiethylethertetraacetatc at pH 8.9, and 0.0l5 M ammonium diaminoeyclohexanetetrancetate at pH 8.4, using Cu as a retaining ion. The proeess for separating Sc from thortveitite ore is presented. The preparation of YF/sub 3/ by the reaction of Y/sub 2/O/sub 3/ and ammonium bifluoride is presented. Heat capacity measurements on praseodymium from room temperature to 1100 deg have been completed, and the results are summarized. The heat capacity of thulium in the temperature range 13 to 350 deg K was measured. A study of the phases of the YF/sub 3/-Y/sub 2/O /sub 3/ system has begun. The study of the phases of the La--Y alloy system is nearly complete. The surface tensions of the binary fused salt systems AgNO/sub 3/--NaNO/sub 3/ and AgNO/sub 3/ --KNO/sub 3/ have been measured by the maximum bubble pressure method, and results are presented. Pyrometallurgy. Extraction experiments have been run to determine the removal of Pu from U by its extraction in immiscible metals and its distribution coefficients between the metals. Analytical Chemistry. By means of a conductometric method the concentration of HF in the atmosphere in the hydrofiuorination rooms was found to be less than one microgram per liter of air. Work continued on a high-temperature fluorination technique for the determination of O/sub 2/ in metals and salts. An analytical method was developed for the determination of rare earths in Th provided the wt. ratio of Th to rare earth is not greater than 1000. A method for the titrimetric determination of Sc has been developed. Spectrochemistry. The emission spectrometric technique for the determination of O/sub 2/ in metal has been extended to the determination of O/ sub 2/ in Nb in the concentration range 0.007 to 0.5%. A spectrometric method is presented for the determination of nitrogen in steel. The infrared spectra of mono-, di-, and triaryl substituted silanes were studied over the region from 5000 cm-/sup -1/ to 450 cm-/sup -1/ and the various silicon--hydrogen vibrational bands identified. Radiochemistry. The decay of Sb/sup 127/ is presented. The research program on the recoil chemistry of C in organic compounds is continuing. The reactions of the cobalt cyclopentadiene compounds are being studied. (For preceding period see ISC-976.) (W.L.H.)
- Research Organization:
- Ames Lab., Ames, Iowa
- DOE Contract Number:
- W-7405-ENG-82
- NSA Number:
- NSA-13-005280
- OSTI ID:
- 4278279
- Report Number(s):
- ISC-1049
- Resource Relation:
- Other Information: Orig. Receipt Date: 31-DEC-59
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ACETATES- ACIDITY- AMINES- AMMONIUM COMPOUNDS- COPPER COMPOUNDS- CYANIDES- CYCLOALKANES- ETHERS- ETHYL RADICALS- HEXANE- IONS- NEODYMIUM COMPOUNDS- ORGANIC NITROGEN COMPOUNDS- PRASEODYMIUM COMPOUNDS- SEPARATION PROCESSES
ADSORPTION- CHROMATOGRAPHY- CITRIC ACID- EDTA- ELEMENTS- ELUTION- GRAIN SIZE- HEDTA- ION EXCHANGE- LIQUIDS- POWDERS- RARE EARTHS- SEPARATION PROCESSES
AIR- ATMOSPHERE- CHEMICAL REACTIONS- CONCENTRATION- CONDUCTOMETRY- ELECTRIC CONDUCTIVITY- FLUORINATION- HYDROFLUORIC ACID- MEASURED VALUES- QUALITATIVE ANALYSIS- QUANTITY RATIO- TRACE AMOUNTS
AMMONIUM COMPOUNDS- CHEMICAL REACTIONS- FLUO