Patent ID: 8206489
Filing Date: 2012-06-26
Classification: B01D

Abstract:
1. A method of deacidizing a gaseous effluent comprising at least one acid compound of the group consisting of: hydrogen sulfide (H 2 S), mercaptans, carbon dioxide (CO 2 ), sulfur dioxide (SO 2 ), carbon oxysulfide (COS) and carbon disulfide (CS 2 ), wherein the following stages are carried out: a) contacting the gaseous effluent with an absorbent solution so as to obtain a gaseous effluent depleted in acid compounds and an absorbent solution laden with acid compounds, the absorbent solution being selected for its property to form two separable phases when it absorbs an amount of acid compounds, b) separating the absorbent solution laden with acid compounds into two fractions: a first absorbent solution fraction depleted in acid compounds and a second absorbent solution fraction enriched in acid compounds, c) regenerating the second absorbent solution fraction enriched in acid compounds obtained in stage b) so as to release part of the acid compounds to provide a regenerated absorbent solution fraction, d) mixing a predetermined amount of water with the first absorbent solution fraction obtained in stage b) or with the regenerated absorbent solution fraction obtained in stage c), then e) recycling the first absorbent solution fraction and the regenerated absorbent solution fraction and the predetermined amount of water as the absorbent solution.