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US 8,241,594 B2Granted
Processes for extracting aluminum and iron from aluminous ores
AssigneeOrbite Aluminae Inc.
InventorsRichard Boudreault, Serge Alex, Fabienne Biasotto
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Abstract
There are provided processes for extracting aluminum ions from aluminous ores. Such processes can be used with various types of aluminous ores such as aluminous ores comprising various types of metals such as Fe, K, Mg, Na, Ca, Mn, Ba, Zn, Li, Sr, V, Ni, Cr, Pb, Cu, Co, Sb, As, B, Sn, Be, Mo, or mixtures thereof.
Claims22
A process for extracting aluminum from argillite, said process comprising:
- leaching said argillite with an acid so as to obtain a leachate and a solid residue, and separating said leachate from said solid residue;
- removing at least a portion of iron ions contained in said leachate by reacting said leachate with a base in order to obtain a pH of at least 10 and substantially selectively precipitating said at least a portion of said iron ions and separating said precipitated at least a portion of said iron ions from said leachate so as to obtain an aluminum enriched composition.
A process for extracting aluminum ions from argillite, said process comprising :
- leaching said argillite with HCl so as to obtain a composition comprising a leachate and a solid residue;
- separating said leachate and said solid residue from one another;
- at least partially removing iron from said leachate by substantially selectively precipitating iron ions by reacting said leachate with a base and removing a so-formed precipitate, so as to obtain an Al-rich composition;
- and
- purifying said Al-rich composition by reacting said Al-rich composition with a base for substantially selectively precipitating aluminum ions.
2 more elements
Dependencies are inferred from the claim text.