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Liquid absorbing acidic gases and use thereof in deacidification of gases

  • US 5,277,885 A
  • Filed: 05/06/1993
  • Issued: 01/11/1994
  • Est. Priority Date: 05/24/1988
  • Status: Expired due to Term
First Claim
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1. A process for improved CO2 absorption from a gas by an absorbent liquid which has an improved absorption capacity for CO2 which process comprises contacting said gas and the absorbent liquid in an absorption zone having an upper and lower part, thereby obtaining a treated gas with a reduced content of CO2 and the absorbent liquid with increased CO2 content, and regenerating the absorbent liquid which has an increased CO2 content, thereby releasing the CO2 and producing at least one gaseous fraction containing the released CO2 and at least one portion of the regenerated absorbent liquid and recycling said generated absorbent liquid to the absorption zone, the absorbent liquid being a mixture of one or more tertiary alkanolamines and an activator of improved CO2 absorption by said tertiary alkanolamines, the activator having the general formula ##STR6## wherein X is a divalent radical chosen from C2 -C9 alkylene and C4 -C9 cycloalkylene radicals, the symbols R each being independently, a hydrogen atom or a C1 -C6 monovalent hydrocarbyl radical.

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