Salt-soda sinter process for recovering aluminum from fly ash
Abstract
A method for recovering aluminum values from fly ash comprises sintering the fly ash with a mixture of NaCl and Na.sub.2 CO.sub.3 to a temperature in the range 700.degree.-900.degree. C. for a period of time sufficient to convert greater than 90% of the aluminum content of the fly ash into an acid-soluble fraction and then contacting the thus-treated fraction with an aqueous solution of nitric or sulfuric acid to effect dissolution of aluminum and other metal values in said solution.
- Inventors:
-
- Oak Ridge, TN
- Issue Date:
- Research Org.:
- Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)
- OSTI Identifier:
- 863825
- Patent Number(s):
- 4254088
- Assignee:
- United States of America as represented by United States (Washington, DC)
- Patent Classifications (CPCs):
-
C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01F - COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
C - CHEMISTRY C22 - METALLURGY C22B - PRODUCTION AND REFINING OF METALS
- DOE Contract Number:
- AC04-76
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- salt-soda; sinter; process; recovering; aluminum; fly; ash; method; values; comprises; sintering; mixture; nacl; na; temperature; range; 700; degree; -900; period; time; sufficient; convert; 90; content; acid-soluble; fraction; contacting; thus-treated; aqueous; solution; nitric; sulfuric; acid; effect; dissolution; metal; metal values; time sufficient; fly ash; aqueous solution; sulfuric acid; recovering aluminum; comprises sintering; treated fraction; sinter process; /423/
Citation Formats
McDowell, William J, and Seeley, Forest G. Salt-soda sinter process for recovering aluminum from fly ash. United States: N. p., 1981.
Web.
McDowell, William J, & Seeley, Forest G. Salt-soda sinter process for recovering aluminum from fly ash. United States.
McDowell, William J, and Seeley, Forest G. Thu .
"Salt-soda sinter process for recovering aluminum from fly ash". United States. https://www.osti.gov/servlets/purl/863825.
@article{osti_863825,
title = {Salt-soda sinter process for recovering aluminum from fly ash},
author = {McDowell, William J and Seeley, Forest G},
abstractNote = {A method for recovering aluminum values from fly ash comprises sintering the fly ash with a mixture of NaCl and Na.sub.2 CO.sub.3 to a temperature in the range 700.degree.-900.degree. C. for a period of time sufficient to convert greater than 90% of the aluminum content of the fly ash into an acid-soluble fraction and then contacting the thus-treated fraction with an aqueous solution of nitric or sulfuric acid to effect dissolution of aluminum and other metal values in said solution.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Jan 01 00:00:00 EST 1981},
month = {Thu Jan 01 00:00:00 EST 1981}
}
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