Patent ID: 7648562
Filing Date: 2010-01-19
Classification: B01D,C01B,Y02C,Y02P

Abstract:
1. A method for separating by adsorption, in a PSA unit with one or more adsorbers, operating in pressure cycles with given operating parameters, at least one feed gas mixture at a first pressure P 1 with production of at least a first gas mixture stream at a second pressure P 2 lower than P 1 , and at least one second gas mixture stream at a third pressure P 3 lower than P 2 , comprising the step of compressing the second stream in at least two compressors in parallel to a fourth pressure P 4 higher than P 3 , wherein the step of compressing is carried out in a modified mode at a temporary shutdown of one of the compressors of the second stream, and at least one of the said operating parameters of the PSA unit is changed to increase the pressure of the second stream at the outlet of the PSA unit to a fifth pressure P 5 higher than P 3 during the modified mode.