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Title: 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:
 [1];  [1]
  1. 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 C22 - METALLURGY C22B - PRODUCTION AND REFINING OF METALS
C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01F - COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH 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 = {1981},
month = {1}
}