Gas separation – Means within gas stream for conducting concentrate to collector
Patent
1988-12-22
1989-11-14
Spitzer, Robert
Gas separation
Means within gas stream for conducting concentrate to collector
55 58, 55 62, 55 66, 55 68, 55 74, 55 75, 55162, 55179, 55387, 55389, B01D 5304
Patent
active
048804436
ABSTRACT:
The apparatus comprises four cylindrical absorbent beds of small particle size (16.times.40 mesh) molecular sieve, two with zeolite and two with carbon molecular sieve. The units are integrated with each carbon bed in series with one of the zeolite beds, with valving at the inlets to the zeolite beds and at the outlets from the carbon beds. The oxygen purity of the gas is increased by selectively adsorbing and exhausting the nitrogen component in the zeolite beds and the argon component in the carbon beds. In a two step cycle, during step 1 of the cycle one pair of beds (one zeolite and one carbon) receives high pressure air as feed gas which pressurizes the beds and establishes a product oxygen flow. Simultaneously, the high pressure gas in the other pair of beds is vented to a lower pressure usually the ambient surroundings, and this depressurization serves to desorb the nitrogen and argon previously adsorbed during the high pressure phase of the cycle. In step 2 of the cycle the adsorbent beds exchange roles. This constant cycling results in a continuous product stream of very high purity oxygen (up to 99.1%). The separation is conducted at a temperature of 297.degree. K. The secondary purifier does not require a regenerative purge flow for the carbon beds for efficient operation, which minimizes the feed gas consumption.
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WO85/01451, PCT Application of Dangieri et al., published on Apr. 11, 1985.
Miller George W.
Theis Clarence F.
Franz Bernard E.
Singer Donald J.
Spitzer Robert
The United States of America as represented by the Secretary of
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