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Expired Canadian patentCanada

Process and plant for recovering elementary sulfur

CA 1062881 A · Owner: Metallgesellschaft Aktiengesellschaft · Inventors: Thomsen, Adolf

CIPO record

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

The present invention relates to a process of recovering elementary sulfur from a reaction gas catalytically reactive to form elementary sulfur in a vapor state in an exothermic reaction, comprising the steps of: a) passing said gas at a temperature within the activation range of said reaction downwardly through a first horizontal bed of a catalyst body maintained at a temperature within the activation temperature range for said reaction from an input side of said body toward a discharge side thereof, thereby forming a hot gas containing elementary sulfur in vapor state, said gas having a subatmospheric pressure; b) partially condensing the sulfur in the vapor state of the hot gas produced …

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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 25, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 25, 1996.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Filed—
GrantedSeptember 25, 1979
Term endedSeptember 25, 1996
Patent numberCA 1062881 A
Classification (IPC)C01B17/04 +1 more

Timeline

Timeline From CIPO dates

198019821984198619881990199219941996Patent grantedSep 25, 1979Term endedSep 25, 1996

Sources & verification

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