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Title: PROCESS OF RECOVERING URANIUM

Abstract

A method is presented for separating and recovering uranium from a complex mixure of impurities. The uranium is dissolved to produce an aqueous acidic solution including various impurities. In accordance with one method, with the uranium in the uranyl state, hydrogen cyanide is introduced into the solution to complex the impurities. Subsequently, ammonia is added to the solution to precipitate the uraniunn as ammonium diuranate away from the impurities in the solution. Alternatively, the uranium is precipitated by adding an alkaline metal hydroxide. In accordance with the second method, the uranium is reduced to the uranous state in the solution. The reduced solution is then treated with solid alkali metal cyanide sufficient to render the solution about 0.1 to 1.0 N in cyanide ions whereat cyanide complex ions of the metal impurities are produced and the uranium is simultaneously precipituted as uranous hydroxide. Alternatively, hydrogen cyanide may be added to the reduced solution and the uranium precipitated subsequently by adding ammonium hydroxide or an alkali metal hydroxide. Other refinements of the method are also disclosed.

Inventors:
Issue Date:
OSTI Identifier:
4202220
Patent Number(s):
2919175
Assignee:
U.S. Atomic Energy Commission
Patent Classifications (CPCs):
C - CHEMISTRY C22 - METALLURGY C22B - PRODUCTION AND REFINING OF METALS
C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01G - COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
NSA Number:
NSA-14-007484
Resource Type:
Patent
Resource Relation:
Other Information: Orig. Receipt Date: 31-DEC-60
Country of Publication:
United States
Language:
English
Subject:
CHEMISTRY; ACIDS; ALKALINE EARTH METALS; AMMONIA; AMMONIUM COMPOUNDS; COMPLEXES; CYANIDES; HYDROXIDES; IMPURITIES; IONS; RECOVERY; SEPARATION PROCESSES; SOLUTIONS; URANATES; URANIUM; URANIUM HYDROXIDES; URANYL COMPOUNDS; WATER

Citation Formats

Kilner, S B. PROCESS OF RECOVERING URANIUM. United States: N. p., 1959. Web.
Kilner, S B. PROCESS OF RECOVERING URANIUM. United States.
Kilner, S B. Tue . "PROCESS OF RECOVERING URANIUM". United States.
@article{osti_4202220,
title = {PROCESS OF RECOVERING URANIUM},
author = {Kilner, S B},
abstractNote = {A method is presented for separating and recovering uranium from a complex mixure of impurities. The uranium is dissolved to produce an aqueous acidic solution including various impurities. In accordance with one method, with the uranium in the uranyl state, hydrogen cyanide is introduced into the solution to complex the impurities. Subsequently, ammonia is added to the solution to precipitate the uraniunn as ammonium diuranate away from the impurities in the solution. Alternatively, the uranium is precipitated by adding an alkaline metal hydroxide. In accordance with the second method, the uranium is reduced to the uranous state in the solution. The reduced solution is then treated with solid alkali metal cyanide sufficient to render the solution about 0.1 to 1.0 N in cyanide ions whereat cyanide complex ions of the metal impurities are produced and the uranium is simultaneously precipituted as uranous hydroxide. Alternatively, hydrogen cyanide may be added to the reduced solution and the uranium precipitated subsequently by adding ammonium hydroxide or an alkali metal hydroxide. Other refinements of the method are also disclosed.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1959},
month = {12}
}