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:
Sep. 11, 1990
Filed:
Oct. 13, 1989
Samuel Stucki, Nussbaumen, CH;
Dieter Winkler, Lauchringen, DE;
Asea Brown Boveri Ltd., Baden, CH;
Abstract
A process for complete removal of nitrites and nitrates from an aqueous solution (1) by means of electrolysis, wherein the aqueous solution (1) is fed to the cathode space (4) of an electrolysis cell (2) and an aqueous solution (10), still containing only non-participating residual salts, is discharged from the anode space (6), whereas the gas (7) formed at the cathode is fed to a catalyst bed (8). In the latter, the gases H.sub.2, NH.sub.3, NO and N.sub.2 O collected in the cathode space (4) are converted to the non-toxic substances N.sub.2 and H.sub.2 O. In addition, partial combustion of H.sub.2 by O.sub.2 from the anode space (6) for maintaining the temperature of the catalyst bed (8).