Patent ID: 6984258

Claim:
A process for treating a gas by adsorption in an adsorber, comprising: a) compressing a gas to be treated; b) making the gas to be treated from step (a) flow through an adsorber in adsorption phase; c) making a stream of regeneration fluid flow through the adsorber in a regeneration phase; c1) during a first part of the adsorber regeneration phase, indirect heat exchange between the gas to be treated from step (a) and a regeneration fluid stream is established in a heat exchanger so as to cool the gas to be treated from step (a) and intended for step (b) and to heat the regeneration fluid intended for step (c), and c2) during a second part of the adsorber regeneration phase, the regeneration fluid is made to flow through the adsorber without making it undergo the heat exchange of step (c1); and d) performing auxiliary refrigeration of the gas to be treated during said step (c2); and heating the regeneration fluid coming from step (c1) by means of an auxiliary heat injection before this regeneration fluid is made to pass through the adsorber.