CHEMICAL EQUILIBRIA AND REACTION RATES FOR HYDROFLUORINATION OF UO$sub 2$ FROM "AMMONIUM DIURANATE" AND FROM UO$sub 3$

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Reaction rates for the hydrofluorination of UO/sub 2/ derived from two widely different source materials (sulfated pot-denitrated UO/sub 3/ and "ammonium diuranate," (ADU)) were determined in a thermobalance over a wide range of temperatures (460 deg F to 1150 deg F) and with several HF--H/sub 2/O gas phase mixtures varying from 20 to 100 per cent HF. These data were then organized to yield single plots for each type of feed material. From these plots, maximum instantaneous reaction rates may be determined. These values may be applied to problems dealing with the estimation of minimum retention times required for hydrofluorination ... continued below

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Briggs, G.G. March 12, 1958.

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Description

Reaction rates for the hydrofluorination of UO/sub 2/ derived from two widely different source materials (sulfated pot-denitrated UO/sub 3/ and "ammonium diuranate," (ADU)) were determined in a thermobalance over a wide range of temperatures (460 deg F to 1150 deg F) and with several HF--H/sub 2/O gas phase mixtures varying from 20 to 100 per cent HF. These data were then organized to yield single plots for each type of feed material. From these plots, maximum instantaneous reaction rates may be determined. These values may be applied to problems dealing with the estimation of minimum retention times required for hydrofluorination in counter-current gas-solid contactors. In addition to the rate studies, the thermobalance was used to establish temperatures corresponding to equilibrium in the system, UO/sub 2/(s)-- UF/sub 4/(s)--HF(g) --H/sub 2/O(g), at several selected HF/H/sub 2/O ratios in the gas phase. These data, together with thermodynamic theory, were employed to calculate equilibrium conditions at total pressures other than one atmosphere and for various dilutions of the gas phase with an inert gas. (auth)

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  • Other Information: Decl. Mar. 28, 1960. Orig. Receipt Date: 31-DEC-60

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  • Report No.: NLCO-720
  • Grant Number: AT(30-1)-1156
  • DOI: 10.2172/4152769 | External Link
  • Office of Scientific & Technical Information Report Number: 4152769
  • Archival Resource Key: ark:/67531/metadc865774

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  • March 12, 1958

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  • Sept. 16, 2016, 12:32 a.m.

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Briggs, G.G. CHEMICAL EQUILIBRIA AND REACTION RATES FOR HYDROFLUORINATION OF UO$sub 2$ FROM "AMMONIUM DIURANATE" AND FROM UO$sub 3$, report, March 12, 1958; United States. (digital.library.unt.edu/ark:/67531/metadc865774/: accessed October 23, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.