Dealkynation of olefin and diolefin streams
CA 1058641 A · Owner: The Dow Chemical Company · Inventors: Frevel, Ludo K.; Kressley, Leonard J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Lower alkynes are effectively removed from olefin and diolefin streams by contacting the stream containing dissolved hydrogen with a finely divided metal catalyst consisting of copper plus at least one polyvalent activator metal supported on a high surface area gamma alumina containing 0.1 to 1.5 weight percent sodium oxide. The catalyst is easily regenerated by oxidation and hydrogen reduction at moderate temperatures.
Read the whole patent
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 July 17, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 17, 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.