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. 07, 1988
Filed:
Dec. 30, 1981
Anthony B LaConti, Lynnfield, MA (US);
Thomas G Coker, Lexington, MA (US);
Oronzio de Nora Impianti Elettrochimici S.p.A., Milan, IT;
Abstract
A unitary membrane-electrode assembly includes an electrode structure with multiple layers having different overvoltages for the desired electrochemical reaction. In the preferred arrangement the layer attached to the membrane has the higher overvoltage thereby preferentially locating the reaction zone a small but controlled distance away from the electrode membraneinterface. In a NaCl brine electrolysis process the use of a dual layer electrode as the cathode is particularly useful because it eliminates formation of concentrated caustic at the membrane surface. As a result, back migration of OH.sup.- ions is reduced and cathodic current efficiency is increased.