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:
Mar. 11, 2008
Filed:
May. 21, 2003
Applicants:
Zbigniew Twardowski, Vancouver, CA;
Thomas Drackett, Vancouver, CA;
Stuart R. Harper, Ottawa, CA;
Inventors:
Assignee:
Aker Kvaerner Canada Inc., Vancouver, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C25B 1/24 (2006.01);
U.S. Cl.
CPC ...
Abstract
Chlorine is produced by electrolysis of aqueous HCl, in a membrane electrolyzer, using cathodic mediators such as Fe(III) and/or Cu(II) chlorides and a non-catalysed 3-dimensional cathode, with the real surface area at least ten times higher than its projected area. The HCl electrolysis section is combined with an oxidizer for regeneration of the mediator, product water removal step and optional HCl recovery step. Under optimized conditions chlorine can be produced at very high current densities of 30 kA/m, without initiating undesired Hevolution reaction at the cathode.