Reduction of iron in a reductive stripping process for the recovery of uranium from wet process phosphoric acid

Patent · Tue Jul 24 00:00:00 EDT 1984

OSTI ID:6410918

Bierman, L W; Polinsky, S M

Disclosed is a two-stage reductive stripping process for recovering uranium from wet process phosphoric acid, wherein the ferrous ions required for the first-stage reductive strip are supplied by heating a portion of acid raffinate phosphoric acid from the first-stage extraction in the presence of pressurized hydrogen gas. The pressurized hydrogen gas reduces the ferric ions in the raffinate to the ferrous state without any addition of metallic iron or other impurity, so that the uranium-enhanced reductive strip solution supplied to the second stage from the first stage reductive strip has a low concentration of iron impurity, and no further purification to remove iron impurity is required.

• Assignee: J.R. Simplot Co.
• Patent Number(s): US 4461746
• OSTI ID: 6410918
• Resource Relation: Patent File Date: Filed date 16 Feb 1982; Other Information: PAT-APPL-349026
• Country of Publication: United States
• Language: English

Related Subjects

11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
URANIUM
RECOVERY
COMPRESSED GASES
HYDROGEN
IMPURITIES
IRON
PHOSPHATE ROCKS
PHOSPHORIC ACID
PURIFICATION
REDUCTION
REMOVAL
SOLUTION MINING
SOLVENT EXTRACTION
ACTINIDES
CHEMICAL REACTIONS
ELEMENTS
EXTRACTION
FLUIDS
GASES
HYDROGEN COMPOUNDS
INORGANIC ACIDS
METALS
MINING
NONMETALS
ROCKS
SEDIMENTARY ROCKS
SEPARATION PROCESSES
TRANSITION ELEMENTS
050400* - Nuclear Fuels- Feed Processing