Extraction of trace metals from fly ash

Patent · 15 August 1983

OSTI ID:6975097

Blander, M; Wai, C M; Nagy, Z

A process is described for recovering silver, gallium and/or other trace metals from a fine grained industrial fly ash associated with a process for producing phosphorous. The fly ash has a silicate base and contains surface deposits of the trace metals as oxides, chlorides or the like. The process is carried out by contacting the fly ash with AlCl/sub 3/ in an alkali halide melt to react the trace metals with the AlCl/sub 3/ to form compositions soluble in the melt and a residue containing the silicate and aluminum oxide or other aluminum precipitate, and separating the desired trace metal or metals from the melt by electrolysis or other separation techniques.

• DOE Contract Number: W-31109-ENG-38
• Assignee: Dept. of Energy
• Patent Number(s): None
• Application Number: ON: DE84011044
• OSTI ID: 6975097
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320305* -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Industrial Waste Management
AEROSOL WASTES
ALUMINIUM CHLORIDES
ALUMINIUM COMPOUNDS
ASHES
CHLORIDES
CHLORINE COMPOUNDS
ELECTROLYSIS
ELEMENTS
EXTRACTION
FLY ASH
GALLIUM
HALIDES
HALOGEN COMPOUNDS
LYSIS
MANAGEMENT
MATERIALS RECOVERY
METALS
PROCESSING
RECOVERY
RESIDUES
SEPARATION PROCESSES
SILVER
TRACE AMOUNTS
TRANSITION ELEMENTS
WASTE MANAGEMENT
WASTE PROCESSING
WASTES