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Title: METHOD OF PROCESSING MONAZITE SAND

Abstract

A method is given for the pretreatment of monazite sand with sodium hydroxide. When momazite sand is reacted with sodium hydroxide, the thorium, uranium, and rare earths are converted to water-insoluble hydrous oxides; but in the case of uranium, the precipitate compound may at least partly consist of a slightly soluble uranate. According to the patent, monazite sand is treated with an excess of aqueous sodium hydroxide solution, and the insoluble compounds of thorium, uranium, and the rare earths are separated from the aqueous solution. This solution is then concentrated causing sodium phosphate to crystallize out. The crystals are removed from the remaining solution, and the solution is recycled for reaction with a mew supply of momazite sand.

Inventors:
Issue Date:
OSTI Identifier:
4337220
Patent Number(s):
2811411
Assignee:
U.S. Atomic Energy Commission
Patent Classifications (CPCs):
C - CHEMISTRY C22 - METALLURGY C22B - PRODUCTION AND REFINING OF METALS
NSA Number:
NSA-12-004597
Resource Type:
Patent
Resource Relation:
Other Information: Orig. Receipt Date: 31-DEC-58
Country of Publication:
United States
Language:
English
Subject:
PATENTS; ANGULAR DISTRIBUTION; CROSS SECTIONS; CRYSTALLIZATION; D-WAVE; ELEMENTARY PARTICLES; ENERGY RANGE; ENRICHMENT; ERRORS; FIELD THEORY; HYDROGEN; LIQUIDS; MEASURED VALUES; MONAZITES; OXIDES; PATENT; PHASE SHIFT; PIONS; PROTONS; QUANTUM MECHANICS; RARE EARTHS; SAND; SCATTERING; SCINTILLATION COUNTERS; SEPARATION PROCESSES; SODIUM HYDROXIDES; SODIUM PHOSPHATES; SOLUTIONS; TARGETS; THORIUM; URANATES; URANIUM; WATER

Citation Formats

Calkins, G D. METHOD OF PROCESSING MONAZITE SAND. United States: N. p., 1957. Web.
Calkins, G D. METHOD OF PROCESSING MONAZITE SAND. United States.
Calkins, G D. Tue . "METHOD OF PROCESSING MONAZITE SAND". United States.
@article{osti_4337220,
title = {METHOD OF PROCESSING MONAZITE SAND},
author = {Calkins, G D},
abstractNote = {A method is given for the pretreatment of monazite sand with sodium hydroxide. When momazite sand is reacted with sodium hydroxide, the thorium, uranium, and rare earths are converted to water-insoluble hydrous oxides; but in the case of uranium, the precipitate compound may at least partly consist of a slightly soluble uranate. According to the patent, monazite sand is treated with an excess of aqueous sodium hydroxide solution, and the insoluble compounds of thorium, uranium, and the rare earths are separated from the aqueous solution. This solution is then concentrated causing sodium phosphate to crystallize out. The crystals are removed from the remaining solution, and the solution is recycled for reaction with a mew supply of momazite sand.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1957},
month = {10}
}