Adsorbent for air separation, production method thereof, and air

Details Adsorbent for air separation, production method thereof, and air Adsorbent for air separation, production method thereof, and air

1997-05-29

1999-02-09

Spitzer, Robert

Gas separation: processes

Solid sorption

Including reduction of pressure

95130, 95902, 423716, 4233282, 423331, 423332, 502 79, B01D 53047

Patent

active

058688188

ABSTRACT:
A crystalline zeolite X adsorbent comprising a crystalline zeolite X having an SiO.sub.2 /A.sub.2 O.sub.3 molar ratio of not larger than 3.0, where lithium cations associated with an AlO.sub.2 tetrahedron unit are 80 to less than 88 mol % of the total cations and the content of alkaline earth metal cations is from 0.5 to less than 4.6 mo % is produced by ion-exchanging with lithium cations at least 90 mol % of the cations associated with an Al.sub.2 O.sub.3 tetrahedron unit of a crystalline zeolite X having an SiO.sub.2 /Al.sub.2 O.sub.3 molar ratio of not larger than 3.0, ion-exchanging the crystalline zeolite X again with an aqueous solution of mixed salts of an alkali metal salt and an alkaline earth metal salt to decrease the lithium cations associated with the AlO.sub.2 tetrahedron unit to 80 to less than 88 mol %, followed by washing and drying, and activating the crystalline zeolite X. The crystalline zeolite X adsorbent is used for the recovery of oxygen from air by a pressure swing adsorption method by using the crystalline zeolite adsorbent.

REFERENCES:
patent: 2835343 (1958-05-01), Wolff et al.
patent: 3140933 (1964-07-01), McKee
patent: 4481018 (1984-11-01), Coe et al.
patent: 4544378 (1985-10-01), Coe et al.
patent: 4859217 (1989-08-01), Chao
patent: 5152813 (1992-10-01), Coe et al.
patent: 5174979 (1992-12-01), Chao et al.
patent: 5258058 (1993-11-01), Coe et al.
patent: 5268023 (1993-12-01), Kirner
patent: 5441557 (1995-08-01), Mullhaupt et al.
patent: 5464467 (1995-11-01), Fitch et al.
patent: 5562756 (1996-10-01), Coe et al.
patent: 5584912 (1996-12-01), Li et al.
patent: 5616170 (1997-04-01), Ojo et al.
patent: 5658370 (1997-08-01), Vigor et al.
patent: 5672195 (1997-09-01), Moreau et al.
patent: 5674311 (1997-10-01), Notaro et al.

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