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Expired Canadian patentCanada

Obtaining but-2-enes from c.sub.4-hydrocarbon mixtures which contain but-1-ene and may or may not contain but-2-enes

CA 1251473 A · Owner: Basf Aktiengesellschaft · Inventors: Lindner, Alfred; Mross, Wolf D.; Volkamer, Klaus

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Abstract From the Canadian patent

But-2-enes are obtained from C4-hydrocarbon mixtures which contain but-1-ene and may or may not contain but-2-enes by catalytic isomerization of the but-1-ene to but-2-enes in an isomerization zone at elevated temperatures by a process in which the isomerization is carried out in combination with a distillative separation zone, the said hydrocarbon mixture being fed to the isomerization zone and/or distillative separation zone, the isomerization mixture obtained from the isomerization zone is passed into the distillative separation zone, a but-1-ene-containing fraction is removed above the lower third of the distillative separation zone and passed into the isomerization zone, and the …

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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 March 21, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 21, 2006.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJuly 26, 1985
GrantedMarch 21, 1989
Term endedMarch 21, 2006
Patent numberCA 1251473 A
Classification (IPC)C07C5/25 +2 more

Timeline

Timeline From CIPO dates

1986198919921995199820012004Application filedJuly 26, 1985Patent grantedMarch 21, 1989Term endedMarch 21, 2006

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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.