Electrolysis: processes – compositions used therein – and methods – Electrolytic synthesis – Preparing nonmetal element
Reexamination Certificate
2003-05-21
2008-03-11
Phasge, Arun S. (Department: 1795)
Electrolysis: processes, compositions used therein, and methods
Electrolytic synthesis
Preparing nonmetal element
C205S620000, C205S621000, C205S622000, C205S624000
Reexamination Certificate
active
07341654
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/m2, without initiating undesired H2evolution reaction at the cathode.
REFERENCES:
patent: 2468766 (1949-05-01), Low
patent: 2666024 (1954-01-01), Low et al.
patent: 3635804 (1972-01-01), Gritzner et al.
patent: 3799860 (1974-03-01), Gritzner et al.
patent: 4311568 (1982-01-01), Balko
patent: 4767511 (1988-08-01), Aragon
patent: 5294319 (1994-03-01), Kaczur et al.
patent: 5385650 (1995-01-01), Howarth et al.
patent: 5411641 (1995-05-01), Trainham, III et al.
patent: 5770035 (1998-06-01), Faita
patent: 6066248 (2000-05-01), Lyke et al.
patent: 6203675 (2001-03-01), Zimmerman et al.
patent: 2250527 (1999-04-01), None
patent: 100 48 004 (2000-04-01), None
patent: 1 365 093 (1974-08-01), None
Abstracts, The Electrochemical Society, Inc. (1998) 193 meeting, May 3-8, No. 871.
De Nora S.p.A. Symposium (1998) May 4-6, pp. 191-203.
Picket, “Electrochemical Reactor Design”, Elsevier Scientific Publ. Co., 232-233 (1979).
UHDE GmbH, “Chlorine and Hydrogen from HCI by Electrolysis”, Hi530, 1000e (Mar. 1993).
Drackett Thomas
Harper Stuart R.
Twardowski Zbigniew
Aker Kvaerner Canada Inc.
Phasge Arun S,.
LandOfFree
Mediated hydrohalic acid electrolysis does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Mediated hydrohalic acid electrolysis, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Mediated hydrohalic acid electrolysis will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3960232