Gas separation: processes – Solid sorption – Including reduction of pressure
Patent
1996-05-13
1997-08-12
Spitzer, Robert
Gas separation: processes
Solid sorption
Including reduction of pressure
95101, 95102, 95130, 95902, B01D 53047
Patent
active
056560664
ABSTRACT:
An improved process for the oxygen enrichment of air by vacuum swing adsorption, pressure swing adsorption or a combination thereof, wherein the improvement comprises providing at least one packing at each of the air inlet to and air outlet from the adsorber, the packing at the air inlet side of the adsorber comprising Na-Ca zeolite X with an SiO.sub.2 /Al.sub.2 O.sub.3 ratio of 2.0 to 2.5 and with a CaO/Al.sub.2 O.sub.3 ratio of 0.4 to 0.75, the ratio being dependent upon the air inlet temperature, at an air inlet temperature of 20.degree. to 30.degree. C., the CaO/Al.sub.2 O.sub.3 ratio of the Na-Ca zeolite X at the inlet zone being 0.4 to 0.6, at an air inlet temperature of 30.degree. to 40.degree. C., the CaO/Al.sub.2 O.sub.3 ratio of the Ca zeolite X at the inlet zone being 0.55 to 0.65 and at an air inlet temperature of 40.degree. to 50.degree. C., the CaO/Al.sub.2 O.sub.3 ratio of the Na-Ca zeolite X at the inlet zone being 0.6 to 0.75, the packing at the air outlet side of the adsorber comprising Na-Ca zeolite A with a CaO/Al.sub.2 O.sub.3 ratio of 0.5 to 1.0 or Na-Ca zeolite X with CaO/Al.sub.2 O.sub.3 ratio of 0.4 to 1.0, above the CaO/Al.sub.2 O.sub.3 ratio of the Na-Ca zeolite X at the inlet side.
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Hees Bruno
Puppe Lothar
Reiss Gerhard
Bayer Aktiengesellschaft
Spitzer Robert
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