Process for removing carbon dioxide from gas mixtures

Details Process for removing carbon dioxide from gas mixtures Process for removing carbon dioxide from gas mixtures

B - Operations, Transporting

01

D

B01D 53/14 (2006.01)

Patent

CA 2473064

The present invention relates to a process for removing carbon dioxide and optionally hydrogen sulphide and/or COS from a gas stream containing these compounds by washing the gas with an aqueous washing solution containing water, sulfolane and a secondary or tertiary amine derived from ethanolamine. More particularly the invention relates to the process described above, the process being carried out in the presence of a primary or secondary amine compound in an amount between 0.5 and 15 wt. % based on water, sulfolane and amine. The invention further relates to an absorbent liquid to be used in the above process.

La présente invention concerne un procédé d'élimination du dioxyde de carbone et facultativement de sulfure d'hydrogène et/ou COS d'un flux de gaz contenant ces composés, par lavage du gaz avec une solution de lavage aqueuse contenant de l'eau, du sulfolane ainsi qu'une amine secondaire ou tertiaire dérivée d'éthanolamine. Plus particulièrement, l'invention concerne le procédé ci-dessus décrit, le procédé étant exécuté en la présence d'un composé amine primaire ou secondaire en une quantité comprise entre 0,5 et 15 % en poids basé sur l'eau, le sulfolane et l'amine. L'invention concerne également un liquide absorbant à utiliser dans le procédé précité.

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