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Title: Extraction of trace metals from fly ash

Abstract

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.

Inventors:
; ;
Issue Date:
OSTI Identifier:
6975097
Application Number:
ON: DE84011044
Assignee:
Dept. of Energy
DOE Contract Number:  
W-31-109-ENG-38
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; FLY ASH; MATERIALS RECOVERY; ALUMINIUM CHLORIDES; ELECTROLYSIS; EXTRACTION; GALLIUM; SILVER; TRACE AMOUNTS; AEROSOL WASTES; ALUMINIUM COMPOUNDS; ASHES; CHLORIDES; CHLORINE COMPOUNDS; ELEMENTS; HALIDES; HALOGEN COMPOUNDS; LYSIS; MANAGEMENT; METALS; PROCESSING; RECOVERY; RESIDUES; SEPARATION PROCESSES; TRANSITION ELEMENTS; WASTE MANAGEMENT; WASTE PROCESSING; WASTES; 320305* - Energy Conservation, Consumption, & Utilization- Industrial & Agricultural Processes- Industrial Waste Management

Citation Formats

Blander, M, Wai, C M, and Nagy, Z. Extraction of trace metals from fly ash. United States: N. p., 1983. Web.
Blander, M, Wai, C M, & Nagy, Z. Extraction of trace metals from fly ash. United States.
Blander, M, Wai, C M, and Nagy, Z. Mon . "Extraction of trace metals from fly ash". United States.
@article{osti_6975097,
title = {Extraction of trace metals from fly ash},
author = {Blander, M and Wai, C M and Nagy, Z},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1983},
month = {8}
}