Cryogenic process for removing acid gases from gas mixtures by means of a solvent

摘要

A process for removing acid gases from natural or synthesis gases by absorption, comprising the following stages: (a) cooling the natural or synthesis gas to be purified to condense part of the CO2 contained in said gas; (b) feeding the cooled and partly condensed gas to an absorption column in order to reduce the acid gas content to the required value; (c) regenerating the solvent or solvents used in the acid gas absorption, the solvent or solvents used being chosen from esters, alcohols and ethers of low molecular weight.