METHOD FOR SEPARATING OXYGEN GAS

WIPO Patent Application WO/2004/007056

A1

A method for separating an oxygen gas from a raw material gas containing oxygen by the single tower type pressure swing adsorption method, which comprises repeating one cycle comprising a series of steps (Figures 3A to 3B) of an adsorption step (Figure 3A) wherein a raw material gas is introduced to an adsorption tower (1) to allow an adsorbing agent to adsorb needless components in the raw material, and the resulting gas enriched in oxygen is derived from the adsorption tower (1), a recovering step (Figure 3B) wherein a gas semi-enriched in oxygen in the adsorption tower (1) is recovered into a recycle vessel (3), a desorption step (Figure 3C) of desorbing at least a part of the needless components from the adsorbing agent and deriving it from the adsorption tower (1), a cleaning step (Figure 3D) of introducing at least a part of the gas semi-enriched in oxygen held in the recycle vessel (3) to the adsorption tower (1) and discharging an exhaust gas from the adsorption tower (1), while maintaining the pressure in the adsorption tower (1) to a constant level, and a pressure raising step (Figures 3E and 3F) of raising the pressure inside the absorption tower (1).

YAMAMOTO MORIHIKO (JP)
SASANO HIROAKI (JP)
MIYAKE MASANORI (JP)

PCT/JP2003/008684

January 22, 2004

July 08, 2003

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SUMITOMO SEIKA CHEMICALS (JP)
YAMAMOTO MORIHIKO (JP)
SASANO HIROAKI (JP)
MIYAKE MASANORI (JP)

B01D53/053; (IPC1-7): B01D53/053

WO2002049959A1

2002-06-27

EP0853966A1	1998-07-22
JP2000237522A	2000-09-05
EP0771583A1	1997-05-07
US3788036A	1974-01-29

Yoshida, Minoru (Tamatsukuri-motomachi Tennoji-k, Osaka-shi Osaka, JP)

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