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Expired Canadian patentCanada

Cryogenic process for the selective removal of acidic gases from mixtures of gases by solvents

CA 1270746 C · Owner: Gazzi, Luigi · Inventors: Gazzi, Luigi; Rescalli, Carlo

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Abstract From the Canadian patent

CASE 2152, "CRYOGENIC PROCESS FOR THE SELECTIVE REMOVAL OF ACIDIC GASES FROM MIXTURES OF GASES BY SOLVENTS" Abstract of the Disclosure, A cryogenic process is disclosed for the selective removal of acidic gases from natural gases or from synthesis gases by adsorption in two towers and cooling of the gas outcoming from the first tower to the purpose of condensing a portion of CO2 contained in the same gas which is characterized in that in it a mixture is used constituted by one or more selective solvents selected among low molecular weight esters, alcohols and ethers of the following classes:, - esters of alcohols of general formula R1COOR2 wherein R1 and R2 are alkyl groups of from 1 to 4 …

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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 June 26, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 26, 2007.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 22, 1986
GrantedJune 26, 1990
Term endedJune 26, 2007
Patent numberCA 1270746 C
Classification (IPC)F25J3/02 +2 more

Timeline

Timeline From CIPO dates

1987199019931996199920022005Application filedMay 22, 1986Patent grantedJune 26, 1990Term endedJune 26, 2007

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