RECOVERY OF THORIUM AND URANIUM VALUES FROM AQUEOUS SOLUTIONS
Abstract
This patent deals with the separation and recovery of uranium from monazite sand. After initial treatment of the sand with sodium hydroxide, a precipitate is obtuined which contains the uranium, thorium, rare earths and some phosphorus. This precipitate is then dissolved in nitric acid. The bulk of the rare earths are removed from thls soiution by adding aa excess of alkali carbonate, causing precipitation of the rare earths together with part of the thorium present. The solution still contains a considerable amount of thorium, some rare earths, and practically all of the uranium originally present. Thorium and rare earth values are readily precipitated from such solution, and the uranium values thus isolated, by the addition of an excess hydrogen peroxide. The pH value of the solution is preferably adjusted to at least 9 prior to the addition of the peroxide.
- Inventors:
- Issue Date:
- Research Org.:
- Originating Research Org. not identified
- OSTI Identifier:
- 4307612
- Patent Number(s):
- 2823976
- Assignee:
- U.S. Atomic Energy Commission
- Patent Classifications (CPCs):
-
C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01F - COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
C - CHEMISTRY C22 - METALLURGY C22B - PRODUCTION AND REFINING OF METALS
- NSA Number:
- NSA-12-010242
- Resource Type:
- Patent
- Resource Relation:
- Other Information: Orig. Receipt Date: 31-DEC-58
- Country of Publication:
- United States
- Language:
- English
- Subject:
- PATENTS; ALKALI METALS; CARBONATES; HYDROGEN PEROXIDES; MONAZITES; NITRIC ACID; PATENT; PHOSPHORUS; PRECIPITATION; RARE EARTHS; RECOVERY; SEPARATION PROCESSES; SODIUM HYDROXIDES; SOLUTIONS; THORIUM; URANIUM; WATER
Citation Formats
Calkins, G D. RECOVERY OF THORIUM AND URANIUM VALUES FROM AQUEOUS SOLUTIONS. United States: N. p., 1958.
Web.
Calkins, G D. RECOVERY OF THORIUM AND URANIUM VALUES FROM AQUEOUS SOLUTIONS. United States.
Calkins, G D. Tue .
"RECOVERY OF THORIUM AND URANIUM VALUES FROM AQUEOUS SOLUTIONS". United States.
@article{osti_4307612,
title = {RECOVERY OF THORIUM AND URANIUM VALUES FROM AQUEOUS SOLUTIONS},
author = {Calkins, G D},
abstractNote = {This patent deals with the separation and recovery of uranium from monazite sand. After initial treatment of the sand with sodium hydroxide, a precipitate is obtuined which contains the uranium, thorium, rare earths and some phosphorus. This precipitate is then dissolved in nitric acid. The bulk of the rare earths are removed from thls soiution by adding aa excess of alkali carbonate, causing precipitation of the rare earths together with part of the thorium present. The solution still contains a considerable amount of thorium, some rare earths, and practically all of the uranium originally present. Thorium and rare earth values are readily precipitated from such solution, and the uranium values thus isolated, by the addition of an excess hydrogen peroxide. The pH value of the solution is preferably adjusted to at least 9 prior to the addition of the peroxide.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Feb 18 00:00:00 EST 1958},
month = {Tue Feb 18 00:00:00 EST 1958}
}