Polyvalent ion exchanged adsorbent for air separation

Details Polyvalent ion exchanged adsorbent for air separation Polyvalent ion exchanged adsorbent for air separation

1982-11-15

1984-11-06

Spitzer, Robert

Gas separation

Means within gas stream for conducting concentrate to collector

55 75, 55389, 502 79, 502 85, B01D 5304

Patent

active

044810180

ABSTRACT:
The invention relates to faujasite-containing compositions in which the original hydrogen or monovalent forms are ion exchanged to their polyvalent form and then thermally activated to promote dehydration and dehydroxylation of the faujasite while maintaining substantially the same zeolite content. The resulting compositions containing faujasites substantially in their dehydrated/dehydroxylated state have been found to have surprisingly high selectivities and capacities for the separation of air into nitrogen and oxygen.

REFERENCES:
patent: 2882244 (1959-04-01), Milton
patent: 3140932 (1964-07-01), McKee
patent: 3140933 (1964-07-01), McKee
patent: 3313091 (1967-04-01), Berlin
patent: 4322394 (1982-03-01), Mezey et al.
Barrer et al., "Ion Exchange and Thermodynamics of Intracrystalline _Sorption", Proceedings of the Royal Society (London), A249, pp. 464-483, _1959.
Donald W. Breck, Zeolite Molecular Sieves, 1974, Chapter Six, _"Chemical Properties and Reactions of Zeolites", pp. 441-528.
D. Atkinson & G. Curthoys, Journal of Chemical Education, "The Determination of Heat of Adsorption by Gas-Solid Chromatography", pp. 564-566.
A. U. Kiselev & Y. I. Yashin, "Gas-Adsorption Chromatography", 1969 pp. 120-125.
Chem. Soc. Faraday Transl. 1981, "Heats and Entropies of Adsorption of Saturated Hydrocarbon by Zeolites X and Y", by D. Atkinson & Curthoys, pp. 897-907.
Journal of Colloid and Interface Science, vol. 28, No. 2, 1968, R. J. Neddenreip, "Sodium Cation Adsorption Sites in Zeolite Types X and Y, pp. 293-304.
Z. Chem. vol. 15, No. 1, 1975, pp. 36-37, Translation, "Separating Ability of Zeolitic Molecular Sieves Toward Nitrogen/Oxygen Mixtures", E. Wolfe, et al.
J. B. Uytterhoeven et al., "Studies of the Hydrogen Held by Solids XVI, Infrared Spectroscopy of X-and Y-Type Zeolites Containing Univalent and Divalent Cations, pp. 425-434.
IzV. Akad, Nauk Gruz., SSR, Ser. Khim., vol. 1, No. 4, pp. 399-402, 1975, T. G. Andronikashuili et al. "Chromatographic Separation of a Mixture of Oxygen and Nitrogen on Cation-Modified Synthetic Mordenites", Translation.
Special Publication No. 33, The Properties and Applications of Zeolites, pp. 92-102.
The Journal of Physical Chemistry, vol. 72, No. 4, 1968, "X-Ray Evidence for Residual Water in Calcined Divalent Cation Faujasite-Type Zeolites", pp. 1400-1401, D. H. Olsen.
Res. Bull. vol. 3, pp. 633-624, J. M. Bennett et al., 1968, "Positions of Cations and Molecules in Zeolites with the Faujasite, Type Framework".
J. W. Ward, A Spectroscopic Study of the Surface of Zeolite Y-vol. 72, No. 12, 1968, "I Infrared Spectra of Structural Hydroxyl Groups and Adsorbed Water on Alkali, Alkaline Earth, and Rare Earth Ion-Exchanged Zeolites", pp. 4211-4223.
Journal of Catalysis 10, pp. 34-46, 1968, J. W. Ward, "The Nature of _Active Sites on _Zeolites III. The Alkali and Alkaline Earth Ion-Exchange Forms".
Canadian Journal of Chemistry, vol. 42, 1964, H. W. Habgood, "Adsorptive _and Gas Chromatographc _Properties of Various Cationic Forms of Zeolite X", pp. 2340-2350.
"Adsorption by Dehydrated Zeolite Crystals", Chapter 8, pp. 593-724, D. W. Breck.
Earth Science and Astronomy, pp. 215-220, H. Minato et al., "Adsorption of CO.sub.2 and N.sub.2 Gases on some Natural Zeolites and their Ion-Exchanged Forms, H. Minato et al.
A.I.Ch.E. Journal, A. L. Myers et al., pp. 121-127,"Thermodynamics of Mixed-Gas Adsorption".
Chemistry and Industry, 1967. p. 829, K.S.W. Sing, "Assessment of Microporosity".
Journal of Colloid and Interface Science 21, pp. 405-414, 1966, J. H. deBoer et al. "The t-Curve of Multimolecular N.sub.2 -Adsorption".
vol. II, Preparation and Examination of Practical Catalysts, pp. 7-13 "Experimental Methods in Catalytic Research", A. P. Bolton.
P. K. Basu et al., Molecular Sieve for Oxygen Enrichment of Air, Jul. 1982, vol. 1, pp. 35-40.
C. W. Roberts, Molecular Sieves for Industrial Separation and Adsorption Applications, Special Pub., #33, Chem. Society, 1980.

Affiliated with

Also associated with

Rating

Polyvalent ion exchanged adsorbent for air separation does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Polyvalent ion exchanged adsorbent for air separation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Polyvalent ion exchanged adsorbent for air separation will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1040903