Patent ID: 7459011
Filing Date: 2008-12-02
Classification: C10L

Abstract:
1. Method for processing a natural gas containing at least one of the following acid compounds: hydrogen sulfide, carbon dioxide, mercaptans, and carbonyl sulfide, where the following steps are taken: a) the natural gas is brought into contact with a solvent that takes up the acid compounds so as to obtain a purified gas and a solvent charged with acid compounds, b) the solvent charged with acid compounds is regenerated so as to obtain a regenerated solvent and release a gaseous effluent containing acid compounds and a fraction of solvent, characterized in that the following steps are carried out: c) the gaseous effluent is brought into contact with a non-aqueous ionic liquid so as to obtain a gas phase containing acid compounds and an ionic liquid charged with solvent, the general formula of the ionic liquid being Q d) the ionic liquid charged with solvent is regenerated to separate the solvent and recover a solvent-impoverished ionic liquid.