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Expired Canadian patentCanada

Process for preparing hydrotreating catalysts prepared from hydrogels and catalysts thus prepared

CA 1312596 C · Owner: Kemp, Richard A. · Inventors: Kemp, Richard A.

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Abstract From the Canadian patent

Process for preparing wide-pore catalysts prepared by incorporating a metals solution containing an element selected from the group consisting of molybdenum, tungsten and mixtures thereof and, an element selected from the group consisting of nickel cobalt and, mixtures thereof, into a phosphated alumina hydrogel support prepared in the presence of a methanol and/or ethanol containing solution. The final calcined catalysts have surface areas greater than 300 m2/g, crush strengths greater than 40.5 N and more than 20% of their pores greater than 15 nm.

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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 January 12, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 12, 2010.
  • 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 9, 1987
GrantedJanuary 12, 1993
Term endedJanuary 12, 2010
Patent numberCA 1312596 C
Classification (IPC)B01J27/18 +2 more

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedOct 9, 1987Patent grantedJan 12, 1993Term endedJan 12, 2010

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