Patent ID: 6290754
Filing Date: 2001-09-18
Classification: B01D,C10L,Y02C

Abstract:
A regenerative process for deacidification of a gas to be treated which contains CO.sub.2 and liquid hydrocarbons comprising the steps of:contacting the gas to be treated, in an absorption zone, with an absorbent liquid including methyldiethanolamine (MDEA) and an activator of absorption of CO.sub.2 by the amine, thereby producing a treated gas with reduced CO.sub.2 content and an absorbent liquid loaded with CO.sub.2,subjecting the loaded absorbent liquid to a regeneration treatment to release CO.sub.2 which it has bound, to produce 1) at least one acid gas fraction rich in CO.sub.2 and 2) at least one regenerated absorbent liquid; andrecycling into the absorption zone the at least one regenerated absorbent liquid,wherein the overall liquid hydrocarbon content in the gas to be treated is greater than 14 liters of liquid hydrocarbons per million standard cubic meters of gas, andwherein said activator consists of at least one compound of formula H.sub.2 N--C.sub.n H.sub.2n --NH--CH.sub.2 --CH.sub.2 OH in which n represents an integer ranging from 1 to 4.