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Expired Canadian patentCanada

Method and apparatus for improved in situ combustion of pyrolysis gases in a kiln

CA 1089794 A · Owner: Mosanto Company · Inventors: Honaker,Donald E.; Jacobs, Louis J. Jr.

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Abstract From the Canadian patent

Temperature control is often a problem in directfired rotary kilns for the pyrolysis of carbonaceous materials wherein at least part of the thermal energy for pyrolysis is obtained by in situ combustion of the pyrolysis gases. The present process and apparatus provides a means by which temperature control, and particularly reduction in intensity of the fireball at the burner end of the kiln and/or moving the fireball away from the burner hood. This is accomplished by (1) controlling the velocity of any burner gases and the velocity of the in situ air (or other oxygen-containing gas) and (2) the distribution of the in situ air at the burner end of the kiln, such that a Craya-Curtet number of …

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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 November 18, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 18, 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 31, 1977
GrantedNovember 18, 1980
Term endedNovember 18, 1997
Patent numberCA 1089794 A
Classification (IPC)C10B49/00 +2 more

Timeline

Timeline From CIPO dates

1978198019821984198619881990199219941996Application filedOct 31, 1977Patent grantedNov 18, 1980Term endedNov 18, 1997

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