Method of recovering uranium from wet process phosphoric acid with enhanced content of uranium
Abstract
In preparing wet process phosphoric acid by decomposing a phosphate rock containing uranium with sulfuric acid and phosphoric acid on condition that hemihydrate gypsum is formed in an acid solution either at the stage of decomposing the phosphate rock or subsequently, uranium contained in the phosphate rock can almost entirely be retained in the obtained phosphoric acid solution by forming the hemihydrate gypsum in the presence of an oxidizing agent, such as a soluble chlorate, hydrogen peroxide or oxygen gas, in the acid solution in a quantity sufficient to render the entire uranium dissolved in the acid solution hexavalent because hemihydrate gypsum adsorbs almost exclusively tetravalent ions of uranium. The uranium is then recovered.
- Inventors:
- Publication Date:
- OSTI Identifier:
- 6708963
- Patent Number(s):
- US 4427641
- Application Number:
- TRN: 84-016103
- Assignee:
- Central Glass Co. Ltd. (Japan)
- Resource Type:
- Patent
- Resource Relation:
- Patent Priority Date: Priority date 28 Jul 1980, Japan; Other Information: PAT-APPL-287151
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS; GYPSUM; ADSORPTION; PHOSPHATE ROCKS; LEACHING; URANIUM; DISSOLUTION; RECOVERY; SOLVENT EXTRACTION; CHEMICAL COMPOSITION; CHEMICAL PREPARATION; HYDROGEN PEROXIDE; ION EXCHANGE; OXIDIZERS; OXYGEN; PHOSPHORIC ACID; REDUCING AGENTS; SULFUR CONTENT; SULFURIC ACID; ACTINIDES; ALKALINE EARTH METAL COMPOUNDS; CALCIUM COMPOUNDS; CALCIUM SULFATES; ELEMENTS; EXTRACTION; HYDROGEN COMPOUNDS; INORGANIC ACIDS; METALS; MINERALS; NONMETALS; OXYGEN COMPOUNDS; PEROXIDES; ROCKS; SEDIMENTARY ROCKS; SEPARATION PROCESSES; SORPTION; SULFATE MINERALS; SULFATES; SULFUR COMPOUNDS; SYNTHESIS; 050400* - Nuclear Fuels- Feed Processing
Citation Formats
Yoshikawa, S, and Nakamura, R. Method of recovering uranium from wet process phosphoric acid with enhanced content of uranium. United States: N. p., 1984.
Web.
Yoshikawa, S, & Nakamura, R. Method of recovering uranium from wet process phosphoric acid with enhanced content of uranium. United States.
Yoshikawa, S, and Nakamura, R. 1984.
"Method of recovering uranium from wet process phosphoric acid with enhanced content of uranium". United States.
@article{osti_6708963,
title = {Method of recovering uranium from wet process phosphoric acid with enhanced content of uranium},
author = {Yoshikawa, S and Nakamura, R},
abstractNote = {In preparing wet process phosphoric acid by decomposing a phosphate rock containing uranium with sulfuric acid and phosphoric acid on condition that hemihydrate gypsum is formed in an acid solution either at the stage of decomposing the phosphate rock or subsequently, uranium contained in the phosphate rock can almost entirely be retained in the obtained phosphoric acid solution by forming the hemihydrate gypsum in the presence of an oxidizing agent, such as a soluble chlorate, hydrogen peroxide or oxygen gas, in the acid solution in a quantity sufficient to render the entire uranium dissolved in the acid solution hexavalent because hemihydrate gypsum adsorbs almost exclusively tetravalent ions of uranium. The uranium is then recovered.},
doi = {},
url = {https://www.osti.gov/biblio/6708963},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jan 24 00:00:00 EST 1984},
month = {Tue Jan 24 00:00:00 EST 1984}
}