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Title: Extraction of trace metals from fly ash

Abstract

A process 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 having a silicate base and containing surface deposits of the trace metals as oxides, chlorides or the like, with the process being 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:
 [1];  [2];  [3]
+ Show Inventor Affiliations
  1. Palos Park, IL
  2. Moscow, ID
  3. Woodridge, IL
Issue Date:
Research Org.:
Argonne National Laboratory (ANL), Argonne, IL (United States)
OSTI Identifier:
865182
Patent Number(s):
4475993
Assignee:
United States of America as represented by United States (Washington, DC)
Patent Classifications (CPCs):
C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01G - COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
C - CHEMISTRY C22 - METALLURGY C22B - PRODUCTION AND REFINING OF METALS
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DOE Contract Number:  
W-31109-ENG-38
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
extraction; trace; metals; fly; ash; process; recovering; silver; gallium; fine; grained; industrial; associated; producing; phosphorous; silicate; base; containing; surface; deposits; oxides; chlorides; carried; contacting; alcl; alkali; halide; melt; react; form; compositions; soluble; residue; aluminum; oxide; precipitate; separating; desired; metal; electrolysis; separation; techniques; fine grained; separation techniques; trace metals; aluminum oxide; fly ash; residue containing; surface deposit; alkali halide; fine grain; separation technique; trace metal; /205/75/

Citation Formats

Blander, Milton, Wai, Chien M, and Nagy, Zoltan. Extraction of trace metals from fly ash. United States: N. p., 1984. Web.
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Blander, Milton, Wai, Chien M, & Nagy, Zoltan. Extraction of trace metals from fly ash. United States.
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Blander, Milton, Wai, Chien M, and Nagy, Zoltan. Sun . "Extraction of trace metals from fly ash". United States. https://www.osti.gov/servlets/purl/865182.
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@article{osti_865182,
title = {Extraction of trace metals from fly ash},
author = {Blander, Milton and Wai, Chien M and Nagy, Zoltan},
abstractNote = {A process 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 having a silicate base and containing surface deposits of the trace metals as oxides, chlorides or the like, with the process being 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 = {Sun Jan 01 00:00:00 EST 1984},
month = {Sun Jan 01 00:00:00 EST 1984}
}
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