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US 7,090,809 B2Granted
Production of aluminum compounds and silica from ores
AssigneeATI-Aluminum Technologies Israel Ltd.
InventorsSimcha Harel, Lev Shapira
Life of this patent
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Abstract
A method for the production of inorganic aluminum substances and amorphous silica from aluminum oxide containing ores, comprising: (a) leaching of said ores with fluorosilicic acid to obtain aluminum fluosilicate solution; (b) filtering said leached solution from insoluble materials; and (c) washing said insoluble materials.
Claims15
A method of treating an aluminum oxide containing source, the method comprising:
- (a) providing the aluminum oxide containing source;
- (b) leaching the aluminum oxide containing source with fluosilicic acid in a leaching stage, to obtain an aluminum fluosilicate solution and a solid residue;
- (c) separating said aluminum fluosilicate solution from said residue, and (d) defluorinating said aluminum fluosilicate solution by heating said solution with sulfuric acid.
A method of treating an aluminum oxide containing source, the method comprising:
- (a) providing the aluminum oxide containing source;
- (b) leaching the aluminum oxide containing source with fluosilicic acid in a leaching stage, to obtain an aluminum fluosilicate solution and a solid residue;
- (c) separating said aluminum fluosilicate solution from said residue, and (d) boiling said solution, subsequent to said separating of said aluminum fluosilicate solution from said residue, so as to evaporate silicon tetrafluoride.
Dependencies are inferred from the claim text.