Published February 17, 1984 | Version v1
Patent Metadata-only

Process for the valorization of uranium and rare earths contained in impure UF4 obtained by solvent extraction of phosphoric acid

Creators

Description

UF4 is dissolved in 2 steps at an appropriate temperature. In the first step insufficient amounts of HNO3 and Al compound for a complete dissolution are added the suspension obtained is stirred for at least 1/2 hr. In the second step more HNO3 and Al compound are added under stirring for a complete dissolution of UF4. Uranyle nitrate is extracted by a solvent containing a phosphoric acid ester and rare earth are recovered in the aqueous phase by precipitation with alkali

Availability note (English)

Available from Institut National de la Propriete Industrielle, Paris (France).

Abstract (French)

On effectue la dissolution de l'UF4 en deux etapes a une temperature appropriee, la premiere etape consistant a introduire des quantites insuffisantes d'acide nitrique et du compose d'aluminium pour dissoudre completement le tetrafluorure d'uranium impur et a maintenir sous agitation la suspension obtenue pendant un temps d'au moins 0,5 heure, la deuxieme etape consistant a introduire les quantites d'acide nitrique et du compose d'aluminium au moins suffisante pour mettre en solution l'uranium non dissous dans la premiere etape et en maintenant sous agitation la suspension. Le nitrate d'uranyle est traite par le solvant d'extraction contenant l'ester phosphorique et les terres rares sont precipites de la solution aqueuse par traitement par un alcali

Additional details

Additional titles

Original title (French)
Procede de valorisation de l'uranium et des terres rares contenues dans de l'UF

Publishing Information

Imprint Pagination
12 p.
IPC:
Int. Cl. C01g43/00; B01f1/00; C01f17/00; C01b25/234.
IPC
Int. Cl. C01g43/00; B01f1/00; C01f17/00; C01b25/234.
Patent number
FR patent document 2531697/A/

INIS

Country of Publication
France
Country of Input or Organization
France
INIS RN
16026423
Subject category
S11: NUCLEAR FUEL CYCLE AND FUEL MATERIALS;
Resource subtype / Literary indicator
Non-conventional Literature
Descriptors DEI
PHOSPHORIC ACID; PHOSPHORIC ACID ESTERS; PRECIPITATION; PURIFICATION; RARE EARTHS; SOLVENT EXTRACTION; URANIUM; URANIUM TETRAFLUORIDE; URANYL NITRATES
Descriptors DEC
ACTINIDE COMPOUNDS; ACTINIDES; ELEMENTS; ESTERS; FLUORIDES; FLUORINE COMPOUNDS; HALIDES; HALOGEN COMPOUNDS; HYDROGEN COMPOUNDS; INORGANIC ACIDS; METALS; NITRATES; NITROGEN COMPOUNDS; ORGANIC COMPOUNDS; ORGANIC PHOSPHORUS COMPOUNDS; OXYGEN COMPOUNDS; PHOSPHORUS COMPOUNDS; SEPARATION PROCESSES; URANIUM COMPOUNDS; URANIUM FLUORIDES; URANYL COMPOUNDS

Optional Information

Secondary number(s)
FR patent application 8214353.