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Title: PROCESSING OF MONAZITE SAND

Abstract

A process for the recovery of thorium, uranium, and rare earths from monazite sands is presented. The sands are first digested and dissolved in concentrated NaOH, and the solution is then diluted causing precipitation of uranium, thorium and rare earth hydroxides. The precipitate is collected and dissolved in HCl, and the pH of this solution is adjusted to about 6, precipitating the hydroxides of thorium and uranium but leaving the rare earths in solution. The rare earths are then separated from the solution by precipitation at a still higher pH. The thorium and uranium containing precipitate is redissolved in HNO/sub 3/ and the two elements are separated by extraction into tributyl phosphate and back extraction with a weakly acidic solution to remove the thorium.

Inventors:
;
Publication Date:
Research Org.:
Originating Research Org. not identified
OSTI Identifier:
4329541
Patent Number(s):
US 2815264
Assignee:
U.S. Atomic Energy Commission DTIE; NSA-12-006990
NSA Number:
NSA-12-006990
Resource Type:
Patent
Resource Relation:
Other Information: Orig. Receipt Date: 31-DEC-58
Country of Publication:
United States
Language:
English
Subject:
PATENTS; ACIDS; BUTYL PHOSPHATES; HYDROCHLORIC ACID; HYDROXIDES; MONAZITES; PATENT; PRECIPITATION; RARE EARTHS; RECOVERY; SAND; SODIUM HYDROXIDES; SOLUTIONS; SOLVENT EXTRACTION; THORIUM; THORIUM HYDROXIDES; URANIUM; URANIUM HYDROXIDES

Citation Formats

Calkins, G.D., and Bohlmann, E.G.. PROCESSING OF MONAZITE SAND. United States: N. p., 1957. Web.
Calkins, G.D., & Bohlmann, E.G.. PROCESSING OF MONAZITE SAND. United States.
Calkins, G.D., and Bohlmann, E.G.. Sun . "PROCESSING OF MONAZITE SAND". United States. doi:.
@article{osti_4329541,
title = {PROCESSING OF MONAZITE SAND},
author = {Calkins, G.D. and Bohlmann, E.G.},
abstractNote = {A process for the recovery of thorium, uranium, and rare earths from monazite sands is presented. The sands are first digested and dissolved in concentrated NaOH, and the solution is then diluted causing precipitation of uranium, thorium and rare earth hydroxides. The precipitate is collected and dissolved in HCl, and the pH of this solution is adjusted to about 6, precipitating the hydroxides of thorium and uranium but leaving the rare earths in solution. The rare earths are then separated from the solution by precipitation at a still higher pH. The thorium and uranium containing precipitate is redissolved in HNO/sub 3/ and the two elements are separated by extraction into tributyl phosphate and back extraction with a weakly acidic solution to remove the thorium.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun Dec 01 00:00:00 EST 1957},
month = {Sun Dec 01 00:00:00 EST 1957}
}