| US 7,470,829 B2 | ||
| Method for processing a natural gas with extraction of the solvent contained in the purified natural gas | ||
| Renaud Cadours, Francheville (France); Fabrice Lecomte, Paris (France); Lionel Magna, Lyon (France); and Cécile Barrere-Tricca, Soucieu En Jarrest (France) | ||
| Assigned to Institut Francais du Petrole, Ruiel Malmaison Cedex (France) | ||
| Filed on Feb. 14, 2005, as Appl. No. 11/57,026. | ||
| Claims priority of application No. 04 01504 (FR), filed on Feb. 13, 2004. | ||
| Prior Publication US 2005/0205468 A1, Sep. 22, 2005 | ||
| Int. Cl. C07C 7/10 (2006.01) | ||
| U.S. Cl. 585—833 [208/189] | 14 Claims |
| 1. Method for processing a natural gas containing acid compounds such as hydrogen sulfide and carbon dioxide, comprising the
following steps:
a) bringing the natural gas into contact with a solvent that takes up the acid compounds so as to obtain a purified gas containing
solvent as well as a solvent charged with acid compounds,
b) bringing the purified gas obtained in step a) into contact with a non-aqueous ionic liquid so as to obtain a solvent-impoverished
purified gas and an ionic liquid charged with solvent, the general formula of the ionic liquid being Q+ A−, where Q+ designates an ammonium, phosphonium, and/or sulfonium cation, and A− designates an anion able to form a liquid salt, and
c) regenerating the solvent charged with acid compounds, obtained in step a), by expansion and/or by heating.
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