Am/Cm Oxalate Precipitation and Washing Demonstration

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The purpose of this report is to discuss the findings of the Am/Cm Oxalate Precipitation and Washing Demonstration carried out at TNX during December 1995. This demonstration consisted of two steps: oxalate precipitation and precipitate washing. The first step reacted Am/Cm stimulant solution with oxalic acid resulting in the formation of insoluble lanthanide oxalates and soluble metal oxalates. The second step consisted of washing the precipitate with equal volumes of a nitric acid/oxalic acid solution to remove unwanted cations (miscellaneous metals) from the slurry. Quantitative results consist of: the solubility of the metallic impurities and lanthanide oxalates under process conditions, ... continued below

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39 p.

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Beck, S.B. June 11, 1996.

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This report is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. It has been viewed 76 times . More information about this report can be viewed below.

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Description

The purpose of this report is to discuss the findings of the Am/Cm Oxalate Precipitation and Washing Demonstration carried out at TNX during December 1995. This demonstration consisted of two steps: oxalate precipitation and precipitate washing. The first step reacted Am/Cm stimulant solution with oxalic acid resulting in the formation of insoluble lanthanide oxalates and soluble metal oxalates. The second step consisted of washing the precipitate with equal volumes of a nitric acid/oxalic acid solution to remove unwanted cations (miscellaneous metals) from the slurry. Quantitative results consist of: the solubility of the metallic impurities and lanthanide oxalates under process conditions, the settling rate of the oxalates, the specific volume of the oxalate precipitate, and the minimum distance the solution transfer jet can be place from the oxalate solids to prevent entrainment. Finally, discussion of how to decrease lanthanide losses is presented in terms of transfer jet location, initial nitric acid concentration, and wash nitric acid concentration. Solubilizing the precipitate and adjusting the nitric acid concentration prior to vitrification were not performed in this demonstration.

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39 p.

Notes

OSTI as TI96060098

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  • Other Information: PBD: 11 Jun 1996

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  • Other: TI96060098
  • Report No.: WSRC-TR--96-0116
  • Grant Number: AC09-89SR18035
  • DOI: 10.2172/274895 | External Link
  • Office of Scientific & Technical Information Report Number: 274895
  • Archival Resource Key: ark:/67531/metadc667889

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Office of Scientific & Technical Information Technical Reports

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  • June 11, 1996

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  • June 29, 2015, 9:42 p.m.

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  • Feb. 9, 2016, 4:38 p.m.

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Beck, S.B. Am/Cm Oxalate Precipitation and Washing Demonstration, report, June 11, 1996; Aiken, South Carolina. (digital.library.unt.edu/ark:/67531/metadc667889/: accessed December 11, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.