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Expired Canadian patentCanada

Continuous process for the direct conversion of potassium chloride to potassium chlorate by electrolysis

CA 1181718 A · Owner: Atochem North America, Inc. · Inventors: Walker, Morris P.; Hodges, Jimmie R.; Brooks, Wayne E.

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Abstract From the Canadian patent

A continuous closed-loop process for directly producing potassium chlorate by electrolysis of an aqueous potassium chloride solution with a metal anode is described. The process provides surprising advantages in efficiency by comparison with conventional double decomposition processes for producing potassium chlorate from electrolyzed sodium chloride. The metal anode is coated with a precious metal, oxide or alloy or a platinate. The aqueous solution is passed through a heat exchanger using a heated cooling medium which is at a temperatue below the equilibrium temperature of the solution in the cell but above the temperature atwhich potassium chlorate crystallizes from solutions of the …

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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 29, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 29, 2002.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJuly 15, 1981
GrantedJanuary 29, 1985
Term endedJanuary 29, 2002
Patent numberCA 1181718 A
Classification (IPC)C25B1/24 +1 more

Timeline

Timeline From CIPO dates

1982198519881991199419972000Application filedJuly 15, 1981Patent grantedJan 29, 1985Term endedJan 29, 2002

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