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:
Feb. 09, 2010
Filed:
Oct. 21, 2003
Nicolas Mugnier, Queensland, AU;
Patrick Leizour, Aix en Provence, FR;
Nicolas Mugnier, Queensland, AU;
Patrick Leizour, Aix en Provence, FR;
Pechiney Rhenalu, Paris, FR;
Abstract
Process for the treatment of bauxite () by alkaline digestion, typically using the Bayer process in order to obtain alumina hydrate, characterized in that ground bauxite () is added directly into an alkaline solution () that is drawn off and that will be reinserted into the Bayer aluminate liquor circuit (), the said alkaline solution () being heated at a temperature such that after the said ground bauxite () and the said alkaline solution have been brought into contact, the temperature of the slurry resulting from this mix is greater than a temperature close to the boiling temperature at atmospheric pressure, in other words typically greater than 95° C. and preferably greater than or equal to the boiling temperature at atmospheric pressure.