RECOVERY OF URANIUM AND THORIUM FROM AQUEOUS SOLUTIONS
Abstract
>A process is described for the recovery of uranium and thorium from monazite sand, which is frequently processed by treating it with a hot sodium hydroxide solution whereby a precipitate forms consisting mainly of oxides or hydroxides of the rare earths, thorium and uranium. The precipitate is dissolved in mineral acid, and the acid solution is then neutralized to a pH value of between 5.2 and 6.2 whereby both the uranium and thorium precipitate as the hydroxides, while substantially all the rare earth metal values present remain in the solution. The uranium and thoriunn can then be separated by dissolving the precipitate in a solution containing a mixture of alkali carbonate and alkali bicarbonate: and contacting the carbonate solution with a strong-base anion exchange resin whereby the uranium values are adsorbed on the resin while the thorium remains in solution.
- Inventors:
- Issue Date:
- Research Org.:
- Originating Research Org. not identified
- OSTI Identifier:
- 4330440
- Patent Number(s):
- 2838370
- Assignee:
- U.S. Atomic Energy Commission
- Patent Classifications (CPCs):
-
B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01J - CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY
C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01F - COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- NSA Number:
- NSA-12-014414
- Resource Type:
- Patent
- Resource Relation:
- Other Information: Orig. Receipt Date: 31-DEC-58
- Country of Publication:
- United States
- Language:
- English
- Subject:
- PATENTS; ABSORPTION; ALKALI METALS; ANIONS; CARBONATES; HYDROXIDES; ION EXCHANGE MATERIALS; MONAZITES; OXIDES; PATENT; PRECIPITATION; RARE EARTHS; RECOVERY; RESINS; SAND; SODIUM HYDROXIDES; SOLUTIONS; THORIUM; THORIUM HYDROXIDES; THORIUM OXIDES; URANIUM; URANIUM HYDROXIDES; URANIUM OXIDES; WATER
Citation Formats
Calkins, G D. RECOVERY OF URANIUM AND THORIUM FROM AQUEOUS SOLUTIONS. United States: N. p., 1958.
Web.
Calkins, G D. RECOVERY OF URANIUM AND THORIUM FROM AQUEOUS SOLUTIONS. United States.
Calkins, G D. Tue .
"RECOVERY OF URANIUM AND THORIUM FROM AQUEOUS SOLUTIONS". United States.
@article{osti_4330440,
title = {RECOVERY OF URANIUM AND THORIUM FROM AQUEOUS SOLUTIONS},
author = {Calkins, G D},
abstractNote = {>A process is described for the recovery of uranium and thorium from monazite sand, which is frequently processed by treating it with a hot sodium hydroxide solution whereby a precipitate forms consisting mainly of oxides or hydroxides of the rare earths, thorium and uranium. The precipitate is dissolved in mineral acid, and the acid solution is then neutralized to a pH value of between 5.2 and 6.2 whereby both the uranium and thorium precipitate as the hydroxides, while substantially all the rare earth metal values present remain in the solution. The uranium and thoriunn can then be separated by dissolving the precipitate in a solution containing a mixture of alkali carbonate and alkali bicarbonate: and contacting the carbonate solution with a strong-base anion exchange resin whereby the uranium values are adsorbed on the resin while the thorium remains in solution.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jun 10 00:00:00 EDT 1958},
month = {Tue Jun 10 00:00:00 EDT 1958}
}