Title:
MANUFACTURE OF OXYGEN-RICH AIR
Document Type and Number:
Japanese Patent JPS61222905
Kind Code:
A
Abstract:
A pressure swing adsorption process is provided for the direct production from ambient air of a moderately enriched oxygen product gas. The production of a product gas having an oxygen concentration of 23 to 30% is effected by a three step cycle wherein (1) the feed air is charged to a bed of nitrogen selective adsorbent until the bed is brought from atmospheric pressure to a pressure in the range of up to 10 atmospheres, (2) reducing the bed pressure to an intermediate level by withdrawal of oxygen enriched product gas therefrom and (3) finally venting the bed to restore atmospheric pressure. By an alternative mode including a fourth step of purging the bed following the venting step, a product of 23 to 45% oxygen concentration is obtained.
Inventors:
UIRUBAA KURAIMAA KURATSUTSU
SHIBAJI SAAKAA
SHIBAJI SAAKAA
Application Number:
JP6197286A
Publication Date:
October 03, 1986
Filing Date:
March 19, 1986
Export Citation:
Assignee:
AIR PROD & CHEM
International Classes:
C01B13/02; B01D53/04; B01D53/047; C01B21/04; (IPC1-7): B01D53/04; C01B13/02; C01B21/04
Domestic Patent References:
| JP55184707A | ||||
| JPS57106504A | 1982-07-02 | |||
| JP40019930A | ||||
| JPS59184707A | 1984-10-20 |
Attorney, Agent or Firm:
Yoshihisa Oshida
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