Vapor phase oxidation process for glyoxal
CA 1064963 A · Owner: American Cyanamid Company · Inventors: Trecek, James B.; Wiesner, George L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The process for preparing glyoxal from ethylene glycol wherein a gaseous mixture of ethylene glycol oxygen, and inert diluent gas is reacted in the presence of a catalyst containing as essential ingredients phosphorus with copper with silver, or with both copper and silver to form glyoxal, is improved by incorporating in said gaseous mixture an amount of a vapor of a bromine compound sufficient to improve the yield of glyoxal but not so much as to significantly increase glycol aldehyde formation or reduce the conversion of the ethylene glycol below about 90?.
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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
- Granted October 23, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 23, 1996.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.