Am/Cm Oxalate Precipitation and Washing Demonstration
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.
- Research Organization:
- Savannah River Site (SRS), Aiken, SC (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC09-89SR18035
- OSTI ID:
- 274895
- Report Number(s):
- WSRC-TR-96-0116; ON: TI96060098; TRN: 94T00583
- Resource Relation:
- Other Information: PBD: 11 Jun 1996
- Country of Publication:
- United States
- Language:
- English
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