Back-extraction of uranium(VI) from organophosphoric acid with hydrazine carbonate

Authors
Watanabe, M Tatsugae, R Shirahashi, K Morita, Y Kubota, M
Citation
M. Watanabe et al., Back-extraction of uranium(VI) from organophosphoric acid with hydrazine carbonate, J RAD NUCL, 250(2), 2001, pp. 377-379
Citations number
8
Categorie Soggetti
Inorganic & Nuclear Chemistry
Journal title
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
ISSN journal
02365731 → ACNP
Volume
250
Issue
2
Year of publication
2001
Pages
377 - 379
Database
ISI
SICI code
0236-5731(200111)250:2<377:BOUFOA>2.0.ZU;2-4
Abstract
The back-extraction of uranium(VI) from di(2-ethylhexyl)phosphoric acid (HD EHP) and diisodecylphosphoric acid (DIDPA) was studied by using hydrazine c arbonate as back-extractant. U(Vl) was back-extracted from n-dodecane solut ions of 0.5M HDEHP - 0.2M TBP and 0.5M DIDPA UM TBP by hydrazine carbonate. The distribution ratios were decreased with an increase of hydrazine carbo nate concentration. The back-extraction equilibria were expressed by slope analysis in consideration of neutralization between the extractant (DIDPA, HDEHP) and hydrazine carbonate, which occurred quantitatively during the ba ck-extraction.