| US 7,585,479 B2 | ||
| Method of deacidizing a gas by partly neutralized multiamines | ||
| Pierre-Louis Carrette, Lyons (France); Renaud Cadours, Francheville (France); Alexandre Gibert, Mornant (France); Monique Prigent, Saint Genis Laval (France); and Pierre Boucot, Ternay (France) | ||
| Assigned to Institut Francais du Petrole, Rueil Malmaison Cedex (France) | ||
| Filed on May 09, 2007, as Appl. No. 11/746,137. | ||
| Claims priority of application No. 06 04103 (FR), filed on May 10, 2006. | ||
| Prior Publication US 2007/0264180 A1, Nov. 15, 2007 | ||
| Int. Cl. B01D 53/40 (2006.01); B01D 53/48 (2006.01); B01D 53/50 (2006.01); B01D 53/52 (2006.01); B01D 53/62 (2006.01) | ||
| U.S. Cl. 423—220 [423/228; 423/242.1; 423/242.7] | 9 Claims |
| 1. Method of deacidizing a gaseous effluent comprising at least one of the acid compounds as follows: H2S, mercaptans, CO2, COS, SO2, CS2, using an absorbent solution comprising reactive compounds with at least two amine functions, wherein the following stages
are carried out:
a) contacting the gaseous effluent with a first fraction of the absorbent solution, so as to obtain a gaseous effluent depleted
in acid compounds and a liquid effluent laden with acid compounds,
b) contacting the liquid effluent obtained in stage a) with a second fraction of absorbent solution laden with molecules more
acid than the acid compounds, so as to cause formation of a first liquid phase depleted in acid compounds and of a second
liquid phase enriched in acid compounds and laden with more acid molecules,
c) separating the first phase from the second phase,
d) regenerating the second phase so as to release a gas stream rich in compounds and a liquid stream poor in acid compounds
and laden with more acid molecules.
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