Process for the purification of bulk gases using chabazite adsor

Details Process for the purification of bulk gases using chabazite adsor Process for the purification of bulk gases using chabazite adsor

1989-04-06

1990-07-24

Spitzer, Robert

Gas separation

Means within gas stream for conducting concentrate to collector

55 68, 55 71, 55 72, 55 75, B01D 5304

Patent

active

049433040

ABSTRACT:
A process is provided for the selective adsorption of one or more minor constituents from a bulk gas stream using a chabazite in which the bulk gas is size excluded from the pore structure of the chabazite or the minor constituent to be separated has a heat of adsorption greater than that of the bulk gas and the process is carried out under conditions such that the partial pressure of the minor constituent is in the linear low pressure region of the isotherm for the minor constituent and the adsorbent is a dehydrated divalent cation-containing chabazite having a Si/Al ratio of 1.8 to 2.7, a cation sitting, f.sub.s, of 0.7 to 1, and a cation distribution, f.sub.d, of 0.62 to 1.

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W. J. Mortier et al., "Positions of Cations and Molecules in Zeolites with the Chabazik Framework," Mat. Res. Bull., vol. 12, pp. 97-102 (1977).
D. W. Breck, Zeolite Molecular Sieves, Structure, Chemistry, and Use, John Wiley & Sons, 1974, pp. 107-110.
S. Cartlidge et al., "Role of potassium in the thermal stability of CHA- and EAB-type zeolites", Zeolites, 1984, vol. 4, Jul., pp. 226-230.
"Zeolite Molecular Sieves," D. W. Breck, John Wiley and Sons, New York, p. 110, (1974).
"Role of potassium in the thermal stability of CHA- and EAB-type zeolites," S. Cartlidge et al, Zeolites, vol. 4, p. 226, (1984).

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