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:
Apr. 07, 2015
Filed:
Sep. 04, 2013
Applicant:
Dundee, Technologies Durables Inc., Montreal, CA;
Inventors:
Jean-Marc Lalancette, Sherbrooke, CA;
Bertrand Dubreuil, Trois-Rivières, CA;
David Lemieux, Thetford Mines, CA;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B09B 1/00 (2006.01); B09B 3/00 (2006.01); C03C 3/087 (2006.01);
U.S. Cl.
CPC ...
B09B 3/0025 (2013.01); C03C 3/087 (2013.01);
Abstract
A method for sequestrating arsenic oxides, comprising forming an insoluble and stable glass incorporating a fully oxidized form of arsenic generated by oxidation of an initial lower oxide of arsenic and stabilization by calcium salt formation. The glass composition for sequestration of arsenic comprises from 50 to 75% silica; from 0.5 to 3% AlO; from 1 to 15% MnO; from 5 to 15% CaO; from 1 to 20% AsOand from 8 to 14% NaO, less than four percent of iron oxides, magnesium oxide and other oxides.