Patent ID: 6051052
Filing Date: 2000-04-18
Classification: B01D

Abstract:
A method for the separation of a gaseous mixture by adsorption under pressure variation between a cycle high pressure and a cycle low pressure in an adsorption unit including at least one adsorber containing at least one adsorbent and having an inlet and an outlet, using a repetitive cycle consisting of the following sequential successive stages:stage I, repressurization from the low pressure of the cycle,stages II and III, during one of which the high pressure of the cycle is reached,stage IV, during which the low pressure of the cycle is reached, and including at least a sub-stage of depressurization and a subsequent sub-stage of purge/elutionwherein each stage (I to IV) involves a fixed gas flow at one end of the adsorber and a free gas flow at the other end of the adsorber, the fixed flows addressing, in alternation, the inlet and outlet of the adsorber from one stage (I to IV) to the next.