Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Group iiia metal or beryllium
Reexamination Certificate
2011-03-29
2011-03-29
Bos, Steven (Department: 1736)
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
Group iiia metal or beryllium
C423S164000, C423S183000, C423S104000, C423S050000, C423S140000, C423S141000, C423S142000, C423S144000, C210S702000
Reexamination Certificate
active
07914756
ABSTRACT:
A method of treating alkaline industrial by-products, such as red mud generated by Bayer process bauxite refining, is described. Embodiments of the method comprise treating the alkaline industrial by-products with salts of divalent and/or polyvalent cations, thereby lowering pH of the alkaline industrial by-products. The method involves replacement reactions in which relatively insoluble hydroxide salts form precipitates, thereby removing hydroxide ions from solution.
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Baldwin, Jr. Philip N.
Farrall Michael W.
Lee Charles Richard
Murray Norman K.
Bos Steven
Haegele Albert
Leyendecker & Lemire LLC
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