Process for the production of perfluoroalkylsulphonyl fluorides and electrodes for performance of the process
CA 2103757 C · Owner: Bulan, Andreas · Inventors: Schlecker, Hartmut; Moretto, Hans-Heinrich; Bulan, Andreas
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides a process for the production of perfluoroalkylsulphonyl fluorides of the formula C n F2n+1SO2F with n=6-10 by electrochemical fluorination of alkylsulphonyl halides of the general formula C n H2n+1SO2X with n=6-10 and X=F Cl, Br or I in, hydrogen fluoride, which process is characterised in that electrodes are used which consist of nickel with a columnar structure or which are coated with nickel with a columnar structure. The invention also provides electrodes for the production of perfluoroalkylsulphonyl fluorides from the corresponding alkylsulphonyl halides by electrochemical fluorination in hydrogen fluoride, which electrodes are characterised in that they …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed August 10, 1993 and granted October 28, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 10, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 10, 2015.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.