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:
Nov. 21, 2000
Filed:
May. 27, 1999
Applicant:
Inventors:
Robert J Allen, Saugus, MA (US);
James R Giallombardo, Beverly, MA (US);
Daniel Czerwiec, Wellesley, MA (US);
Emory S De Castro, Nahant, MA (US);
Khaleda Shaikh, Concord, MA (US);
Assignee:
De Nora S.p.A, , IT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C25B / ;
U.S. Cl.
CPC ...
20429014 ; 20429001 ; 204282 ; 204283 ; 204252 ; 204291 ; 502223 ; 429 40 ; 429 42 ; 429 44 ; 429 14 ; 205620 ; 205622 ; 205624 ; 205625 ; 205635 ;
Abstract
The invention relates to a novel rhodium sulfide catalyst for the reduction of oxygen in industrial electrolyzers. The catalyst is highly resistant towards corrosion and poisoning by organic species, thus resulting particularly suitable for use in aqueous hydrochloric acid electrolysis, when technical grade acid containing organic contaminants is employed.