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Expired Canadian patentCanada

High surface area rhenium sulfide hydrodesulfurization catalysts prepared by an aqueous technique and a process for using them

CA 1331876 C · Owner: Exxon Research And Engineering Company · Inventors: Passaretti-Miscia, June D.

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Abstract From the Canadian patent

This invention relates to a process for the preparation of high surface area rhenium sulfide hydrodesulfurization catalysts and to a process of using such catalysts for hydrotreating particularly, hydrodesulfurizing heavy hydrocarbons. The catalyst may be supported during use. They are preferably made using an aqueous procedure for forming the solid ReS2+x precursor. The precursor is then heated for a period of time in substantially pure H2S.

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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 6, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 6, 2011.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledSeptember 28, 1988
GrantedSeptember 6, 1994
Term endedSeptember 6, 2011
Patent numberCA 1331876 C
Classification (IPC)B01J37/20 +1 more

Timeline

Timeline From CIPO dates

19891992199519982001200420072010Application filedSep 28, 1988Patent grantedSep 6, 1994Term endedSep 6, 2011

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