EP 0011516 B1 19830928 - PROCESS FOR THE RECUPERATION OF URANIUM PRESENT IN PHOSPHATIC COMPOUNDS
Title (en)
PROCESS FOR THE RECUPERATION OF URANIUM PRESENT IN PHOSPHATIC COMPOUNDS
Publication
Application
Priority
FR 7825815 A 19780908
Abstract (en)
[origin: EP0011516A1] 1. A process for recovering the uranium present in phosphate compounds by means of an organic phase containing a dialkyl-pyrophosphoric acid, characterized in that said organic phase also contains at least one mol of a solubilising agent for uranium ammonium dialkyl-pyrophosphate per mol of dialkyl-pyrophosphoric acid, and in that the process comprises the following steps, carried out at a temperature not exceeding 50 degrees C : a) bubbling anhydrous ammonia gas into the organic phase already charged with uranium, to precipitate the ammonium salt of the excess dialkyl-pyrophosphoric acid ; and, b) effecting a liquid-solid separation to separate from the organic phase the ammonium salt of the dialkyl-pyrophosphoric acid precipitated in the course of the previous step a), said solubilising agent for the uranium ammonium dialkyl-pyrophosphate being a liposoluble compound which possesses electron pairs capable of forming hydrogen bonds with the pyrophosphoric acid diesters.
IPC 1-7
IPC 8 full level
C01G 43/00 (2006.01); C22B 60/02 (2006.01)
CPC (source: EP)
C22B 60/026 (2013.01)
Designated contracting state (EPC)
AT BE CH DE FR GB IT LU NL SE
DOCDB simple family (publication)
EP 0011516 A1 19800528; EP 0011516 B1 19830928; AT E4794 T1 19831015; DE 2966225 D1 19831103; FR 2435444 A1 19800404; FR 2435444 B1 19810116
DOCDB simple family (application)
EP 79400627 A 19790907; AT 79400627 T 19790907; DE 2966225 T 19790907; FR 7825815 A 19780908