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:
Jan. 09, 1979
Filed:
Oct. 28, 1977
Tamas Lakatos, Budapest, HU;
Mihaly Miskei, Budapest, HU;
Janos Szolnoki, Budapest, HU;
Ferenc Toth, Almasfuzito, HU;
Laszlo Revesz, Almasfuzito, HU;
Aluminiumipari Tervezo es Kutato Intezet, ALL OF, HU;
Almasfuzitoi Timfoldgyar, ALL OF, HU;
MTA Geokemiai Kutatolaboratorium, ALL OF, HU;
Abstract
The invention relates to a novel process for the selective recovery of the sodium content of red mud originating from alumina plants. According to the process of the invention red mud or a slurry thereof is admixed with a ferric sulfate solution, the resulting suspension is stirred intensively for 0.5 to 1 hour at 15 to 85.degree. C, thereafter, if necessary, the pH of the suspension is adjusted to 4.4 to 4.6 and the solid substance is removed from the suspension. Using the process of the invention the sodium oxide content of red mud can be reduced to below 1.5%.