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Expired Canadian patentCanada

Process for the production of nitriles and oxides

CA 1339424 C · Owner: The Boc Group, Inc. · Inventors: Ramachandran, Ramakrishnan; Maclean, Donald L.; Satchell, Donald P. Jr.

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Abstract From the Canadian patent

An improved process is provided for the production of nitriles and oxides from hydrocarbons by reaction with oxygen, air or a gas enriched in oxygen relative to air preferably the latter, and ammonia where a nitrile is desired, in the presence of a suitable catalyst. An alkane, e.g. propane, is converted to an alkene in a dehydrogenator. The product stream is introduced into an ammoxidation/oxidation reactor. The product formed therein is recovered in a conventional quench tower. The gaseous effluent from the quench tower is treated in a PSA unit to form a gas stream containing the unreacted alkane and alkene as well as a minor amount, i.e. less than about 1 percent by volume, of osygen and …

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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 2, 1997. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 2, 2014.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledFebruary 15, 1989
GrantedSeptember 2, 1997
Term endedSeptember 2, 2014
Patent numberCA 1339424 C
Classification (IPC)C07C255/08 +2 more

Timeline

Timeline From CIPO dates

199019931996199920022005200820112014Application filedFeb 15, 1989Patent grantedSep 2, 1997Term endedSep 2, 2014

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