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Expired Canadian patentCanada

Production of olefins

CA 1085878 A · Owner: Mobil Oil Corporation · Inventors: Chang, Clarence D.; Lang, William H.

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

A process for converting alcohols or ethers having no more than four carbon atoms per alkyl group to olefins comprising contacting the alcohol or ether with a catalyst comprising a crystalline aluminosilicate zeolite having a constraint index from 1.0 to 12.0, a silica/alumina ratio of 12 to 3000 and a crystal density in the dry hydrogen form not substantially less than 1.6 g/cc. characterized in that the partial pressure of said alcohol or ether during said contacting is less than atmospheric. These process conditions show a preference for olefin production with over 85% of the freactant feed being convertible to steam and olefins.

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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 September 16, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 16, 1997.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledOctober 19, 1978
GrantedSeptember 16, 1980
Term endedSeptember 16, 1997
Patent numberCA 1085878 A
Classification (IPC)C07C1/20

Timeline

Timeline From CIPO dates

1979198119831985198719891991199319951997Application filedOct 19, 1978Patent grantedSep 16, 1980Term endedSep 16, 1997

Sources & verification

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