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Expired Canadian patentCanada

Methods for producing methanol synthesis catalysts

CA 1306989 C · Owner: Unisearch Limited · Inventors: Curry-Hyde, Henry E.; Wainwright, Mark S.; Young, David J.

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Abstract From the Canadian patent

A method for the production of a catalyst suitable for the use in the synthesis of methanol obtained by reacting carbon monoxide, carbon dioxide or mixtures thereof with, hydrogen, in which an alloy containing 0 to 50% zinc 30 to, 75 wt. % aluminium, the balance being substantially all copper is extracted using a zincate ion containing aqueous alkali metal hydroxide solution. Catalyts made by the aforementioned process are disclosed, as is their use in the preparation of methanol.

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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 1, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 1, 2009.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 28, 1988
GrantedSeptember 1, 1992
Term endedSeptember 1, 2009
Patent numberCA 1306989 C
Classification (IPC)B01J25/00 +2 more

Timeline

Timeline From CIPO dates

1989199219951998200120042007Application filedJune 28, 1988Patent grantedSep 1, 1992Term endedSep 1, 2009

Sources & verification

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