Patent ID: 6666908
Filing Date: 2003-12-23
Classification: B01D,C10L

Abstract:
A process for deacidizing a natural gas containing acid compounds comprising at least compounds of the carbon dioxide and hydrogen sulfide group, and sulfur compounds comprising at least one of the compounds of the mercaptan, COS and CS2 group, comprising the following stages:a) contacting said natural gas with a regenerated solvent in a primary absorption section so as to produce a gas poor in acid compounds and a solvent containing acid compounds and hydrocarbons, b) contacting said gas poor in acid compounds with a regenerated solvent so as to produce a gas poor in acid compounds and in sulfur compounds and a solvent containing sulfur compounds, c) expanding at least a first fraction of said solvent containing acid compounds and hydrocarbons so as to produce a gaseous effluent containing hydrocarbons and acid compounds, and a solvent containing acid compounds and freed of hydrocarbons, d) contacting said gaseous effluent containing hydrocarbons and acid compounds with at least a first fraction of said solvent containing sulfur compounds so as to produce a gas containing hydrocarbons and sulfur compounds, and freed of acid compounds, as well as a solvent containing acid compounds.