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PREPARATION OF YTTRIUM FLUORIDE IN FLUIDIZED BEDS

Description: The batch fluid-bed hydrofluorination of yttrium oxide to yttrium fluoride of low residual oxygen content was studied in a 3-inch Monel column. Bed temperature, hydrofluorination time, and hydrofluoric acid excess were studied, and the contamination due to equipment corrosion was determined. A sample of the fluoride was converted to metal and analyzed for impurities. A brief investigation of the reaction kinetics was also made on the thermobalance. (auth)
Date: May 1, 1959
Creator: Knudsen, I. E. & Levitz, N. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Separations of yttrium and some rare earths by liquid-liquid extraction

Description: The use of liquid-liquid extraction for the separation of some inorganic compounds was demonstrated. The yttrium-- rare earth concentrates were obtained from Fergusonite ore, Gadolinite ore, and a by-product from an ion-exchange resin separation process. In each case the mixture in terms of oxide was composed of from 50 to 60% yttrium and 5 to 15% heavy rare earths with the light rare earth fraction constituting the remaining material. Tributyl phosphate was generally employed for exracting nit… more
Date: July 1, 1954
Creator: Foos, R. A. & Wilhelm, H. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Progress Relating to Civilian Applications During October 1958

Description: Thermal-conductivity and electrical-resistivity measurements were made on U-1.5 wt,% Zr, encapsulated in Zircaloy-2 with a NaK thermal bond. Data are presented on thermal conductivity measurements made on UO/sub2/ specimens. A method of sink-float measurement to identify factors affecting irradiation- induced volume changes in graphite was continued. The stress-rupture and creep properties of 15% cold-worked Zircaloy-2 are being investigated in the 290 to 400 deg C temperature range in vacuum. … more
Date: November 1, 1958
Creator: Dayton, R. W. & Tipton, C. R., Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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