Reductants for reducing metals in acid media

Patent · Tue Feb 22 04:00:00 EST 1983

OSTI ID:6350292

Smith, M A; Tobias, J M; Worthington, R E

Metals such as iron, uranium, vanadium, molybdenum and rare earths are reduced to lower oxidation states in various acid media using silicon metal or an iron-silicon alloy. In particular, ferric iron and hexavalent uranium in wet-process phosphoric acid are reduced to the ferrous and tetravalent states, respectively, using silicon metal or an iron-silicon alloy to provide a feed acid which is suitable for extraction with an extractant which is selective for tetravalent uranium such as a mixture of mono- and di-(alkylphenyl) esters of orthophosphoric acid.

• Assignee: Uranium Recovery Corp
• Patent Number(s): US 4374805
• OSTI ID: 6350292
• Country of Publication: United States
• Language: English

Related Subjects

050800 -- Nuclear Fuels-- Spent Fuels Reprocessing
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
36 MATERIALS SCIENCE
360100* -- Metals & Alloys
ACTINIDES
ALLOYS
CHEMICAL REACTIONS
ELEMENTS
EXTRACTION
HYDROGEN COMPOUNDS
INORGANIC ACIDS
IRON
IRON ALLOYS
METALS
MOLYBDENUM
RARE EARTHS
REDUCING AGENTS
REDUCTION
SEMIMETALS
SEPARATION PROCESSES
SILICON
SILICON ALLOYS
SOLVENT EXTRACTION
TRANSITION ELEMENTS
URANIUM
VANADIUM