The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 29, 2011
Filed:
Nov. 10, 2003
Philip N. Baldwin, Jr., Colorado Springs, CO (US);
Norman K. Murray, Covington, LA (US);
Charles Richard Lee, Vicksburg, MS (US);
Michael W. Farrall, Cary, NC (US);
Philip N. Baldwin, Jr., Colorado Springs, CO (US);
Norman K. Murray, Covington, LA (US);
Charles Richard Lee, Vicksburg, MS (US);
Michael W. Farrall, Cary, NC (US);
Other;
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.