Method of recovering uranium from wet process phosphoric acid with enhanced content of uranium

Patent · Tue Jan 24 04:00:00 EST 1984

OSTI ID:6708963

Yoshikawa, S; Nakamura, R

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.

• Assignee: Central Glass Co. Ltd. (Japan)
• Patent Number(s): US 4427641
• OSTI ID: 6708963
• Country of Publication: United States
• Language: English

Related Subjects

050400* -- Nuclear Fuels-- Feed Processing
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
ACTINIDES
ADSORPTION
ALKALINE EARTH METAL COMPOUNDS
CALCIUM COMPOUNDS
CALCIUM SULFATES
CHEMICAL COMPOSITION
CHEMICAL PREPARATION
DISSOLUTION
ELEMENTS
EXTRACTION
GYPSUM
HYDROGEN COMPOUNDS
HYDROGEN PEROXIDE
INORGANIC ACIDS
ION EXCHANGE
LEACHING
METALS
MINERALS
NONMETALS
OXIDIZERS
OXYGEN
OXYGEN COMPOUNDS
PEROXIDES
PHOSPHATE ROCKS
PHOSPHORIC ACID
RECOVERY
REDUCING AGENTS
ROCKS
SEDIMENTARY ROCKS
SEPARATION PROCESSES
SOLVENT EXTRACTION
SORPTION
SULFATE MINERALS
SULFATES
SULFUR COMPOUNDS
SULFUR CONTENT
SULFURIC ACID
SYNTHESIS
URANIUM