ANNUAL SUMMARY RESEARCH REPORT IN CHEMISTRY, JULY 1, 1959-JUNE 30, 1960

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Pilot-plant work on ion exchange separation of rare earths indicates that elution with HEDTA on hydrogen-form resin should conserve Sc. Then, after Sc, Lu, Yb, Tm, and Er are diverted to an auxiliary bed, the remaining rare earths can be resolved with EDTA. Data from investigations of rare-earth glycolate solubilities at 20 and 60 deg C are tabulated. In other work, the effectiveness of glycolic acid for fractionally precipitating rare earths was investigated, and the solubilities and composition rare-earth nitrilotriacetates were studied. Data on preparation of Y are given and information on physical, mechanical, and thermal properties of rare-earths is ... continued below

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Pages: 119

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Creator: Unknown. September 1, 1960.

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Pilot-plant work on ion exchange separation of rare earths indicates that elution with HEDTA on hydrogen-form resin should conserve Sc. Then, after Sc, Lu, Yb, Tm, and Er are diverted to an auxiliary bed, the remaining rare earths can be resolved with EDTA. Data from investigations of rare-earth glycolate solubilities at 20 and 60 deg C are tabulated. In other work, the effectiveness of glycolic acid for fractionally precipitating rare earths was investigated, and the solubilities and composition rare-earth nitrilotriacetates were studied. Data on preparation of Y are given and information on physical, mechanical, and thermal properties of rare-earths is presented. Corrosion of Zr- Sc alloys in high temperature water was studied and data on the physical properties of rare-earth salts obtained during the report period are given. Preliminary results on the mass spectra of group IV-B and V-B elements are presented. Synthetic methods for preparing highly pure VOCl/sub 3/ and VOF/sub 3/ are reported. Results of studies on the fragmentation of N/sup 29/ molecule indicate that more /sup 15/N/sup +/ ions than /sup 14/N/sup +/ are produced by electron bombardment at 45 to 100 volts. A wet chemical procedure for N in metals and alloys by isotope dilution with an average precision of plus or minus 5% is reported. A study in which oxygen isotopes are quantitatively released by KBrF/sub 4/ from inorganic compounds snd determined by isotopic dilution is described. Results of investigations of oxygen isotopes in boron minerals found in the Kramer Ore Body at various levels are tabulated. Methods for isotopic assay of C and N, O and N, Si and O, and B and O in compounds are discribed. Research on the cohesion in polyatomic many-electron systems and on the nature of chemicals is reported from which it is concluded that the chemical bond owes its existence to a lowering of the kinetic energy in the bond region which creates the possibility of a closer approach of the valence electrons to the nuclei with a concomitant lowering of the potential energy. Pyrometallurgy. Data on distribution of rare-earths between Mg-Ag and Cl-Cr phases obtained by radiochemical techniques are presented for Nd, Sm, and Tb. In other work, vapor pressure measurements by the Knudsen method were found unsatisfactory for Zn. A dew point method was used for Zn-Mg and Zn-Al systems. Analytical Chemistry. A high-temperature fluorination apparatus for determining in metals and salts was developed which has a precision of plus or minus 2%. Investigation of organophosphorus compounds for metals was continued with the emphasis on bis-(di- n-hexylphosphinyl) methane. Properties of this compound are tabulated along with data on the extraction of various metals by its use. In differential spectrometry it was found that proper use of a relative method in which the sample absorbance is compared with the absorbance of a known reference can result in an appreciable increase in precision and accuracy. Analytical procedure developments are given for Ce, Al, Cr, Zn, Cu, In, Mg, Th, W, U, Mo, Ta, and Zr. Spectrometric techniques are reported for O determination in metal halides. Spark emission spectra for all rare earths except Ce were observed and an x-ray- fluorescent method for Sc in ores is reportsd. Radiochemistry. The cross sections of the Ar/sup 40/( gamma ,p)Cl/sup 39/, and Ar/sup 40/( gamma ,pn)C l/ sup 38/ reactions as a function of photon energy were determined. In experiments with the acid hydrolysis of trans STAPt(NH/sub 3/)/sub 2/Cl/sub 2/! a first acid hydrolysis with the equilibrium constant of 3.6 x 10/sup -4/ moles/l at 25 deg C and a rate constant of 9.8 x 10/sup -5/ sec/sup -/ s/sup 1/ was observed. Crystal structure investigations of dimethyl zinc LiCuCl/sub 2/ - 2H/sub 2/O, bis- metabromobenzoylmethane, and CrCl/sub 2/ are reported. Completion and testing of a high-precision electron unit and initiation of molecular structure studies are described. (J.R.D.)

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Pages: 119

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  • Other Information: Orig. Receipt Date: 31-DEC-61

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  • Report No.: IS-192
  • Grant Number: W-7405-ENG-82
  • DOI: 10.2172/4002891 | External Link
  • Office of Scientific & Technical Information Report Number: 4002891
  • Archival Resource Key: ark:/67531/metadc871030

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  • September 1, 1960

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  • Sept. 16, 2016, 12:32 a.m.

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  • Oct. 26, 2017, 6:56 p.m.

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ANNUAL SUMMARY RESEARCH REPORT IN CHEMISTRY, JULY 1, 1959-JUNE 30, 1960, report, September 1, 1960; Ames, Iowa. (digital.library.unt.edu/ark:/67531/metadc871030/: accessed December 13, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.