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:
Jun. 15, 2010
Filed:
Jun. 17, 2005
Applicants:
François Cansell, Pessac, FR;
Marie Gaudre, Le Haillan, FR;
Jean-michel Tauzia, Blanquefort, FR;
Inventors:
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C02F 1/72 (2006.01); C02F 101/16 (2006.01); C02F 101/20 (2006.01); C02F 101/38 (2006.01);
U.S. Cl.
CPC ...
Abstract
The invention relates to a method for processing an aqueous effluent (E) containing in solution at least one type of metal (M) nitrite or nitrate whose oxide is stable in an aqueous medium consisting (I) in introducing cations NH+ in aqueous solution, generally in the form of an aqueous ammonia solution, into the aqueous effluent and, subsequently (II) in processing the obtainable medium at a temperature ranging from 100 to 700° C. and a pressure of 1-50 MPa (i.e. from 10 to 500 bar), thereby converting the metal (M) nitrite or nitrate into metal (M) oxide, nitrogen and water.