Process for producing phosphoric acid

Patent · Tue Jan 19 00:00:00 EST 1982

OSTI ID:5750587

Gerunda, A B; Goers, W E

Phosphoric acid and gypsum are produced from phosphate rock by digesting same with sulfuric acid to produce a high concentration of phosphoric acid and calcium sulfate hemihydrate. The solubilized uranium in the rock is rendered recoverable by reducing same from the +6 valence state to the +4 valence state during the digestion step followed by oxidizing back to the +6 valence state in a subsequent step.

• Assignee: Swiss Aluminium Ltd (Switzerland)
• Patent Number(s): US 4311677
• Application Number: TRN: 82-005845
• OSTI ID: 5750587
• Resource Relation: Patent File Date: Filed date 3 Dec 1979; Other Information: PAT-APPL-099917
• Country of Publication: United States
• Language: English

Related Subjects

11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
GYPSUM
PRODUCTION
PHOSPHORIC ACID
URANIUM
RECOVERY
PHOSPHATE ROCKS
REDOX REACTIONS
SEPARATION PROCESSES
SULFURIC ACID
ACTINIDES
ALKALINE EARTH METAL COMPOUNDS
CALCIUM COMPOUNDS
CALCIUM SULFATES
CHEMICAL REACTIONS
ELEMENTS
HYDROGEN COMPOUNDS
INORGANIC ACIDS
METALS
MINERALS
OXYGEN COMPOUNDS
ROCKS
SEDIMENTARY ROCKS
SULFATES
SULFUR COMPOUNDS
050400* - Nuclear Fuels- Feed Processing