Processes for treating fly ashes
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United States of America Patent
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Nov 10, 2015
Grant Date -
Mar 19, 2015
app pub date -
Mar 11, 2013
filing date -
Mar 29, 2012
priority date (Note) -
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status (Latency Note)
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Abstract
There are provided processes for treating fly ash. For example, the processes can comprise leaching fly ash with HCl so as to obtain a leachate comprising aluminum ions and a solid, and separating the solid from the leachate; reacting the leachate with HCl so as to obtain a liquid and a precipitate comprising the aluminum ions in the form of AlCl3, and separating the precipitate from the liquid; and heating the precipitate under conditions effective for converting AlCl3 into Al2O3 and optionally recovering gaseous HCl so-produced.
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International Classification(s)
- C22B:PRODUCTION OR REFINING OF METALS
- C01B:NON-METALLIC ELEMENTS; COMPOUNDS THEREOF
- A62D:CHEMICAL MEANS FOR EXTINGUISHING FIRES; PROCESSES ....
- C01G:COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLAS....
- C01F:COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUM....
- C01D:COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, ....
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