Process for deacidification of a gas with an absorbing solution in fractional regeneration

摘要

Deacidification of a gaseous effluent (A), comprises: placing (A) in contact with an absorbing solution (II) to obtain (A) deprived of acid compounds (I) and (II) (charged with (I)); separating (II) (charged with (I)) into a first fraction of (II) deprived of (I) and a second fraction of (II) enriched in (I); regeneration of the second fraction to release a part of (I); recycling the first fraction of (II) and the regenerated (II). Deacidification of a gaseous effluent (A) (comprising an acid compound of hydrogen sulfide, mercaptans, carbon dioxide, sulfur dioxide, carbon oxysulfide or carbon disulfide), comprises: contacting (A) with an absorbing solution (II) (having property to form two separable phases when it absorbs a quantity of acid compounds (I)), to obtain (A) deprived of (I) and (II) (charged with (I)); separating (II) (charged with (I)) into a first fraction of (II) deprived of (I) and a second fraction of (II) enriched in (I); regeneration of the second fraction to release a part of (I); and recycling the first fraction of (II) and the regenerated (II).