Organic compounds -- part of the class 532-570 series – Organic compounds – Amino nitrogen containing
Patent
1989-05-15
1991-02-26
Raymond, Richard L.
Organic compounds -- part of the class 532-570 series
Organic compounds
Amino nitrogen containing
C07C23303
Patent
active
049963228
ABSTRACT:
Amides having different molecular kinetic diameters or heats of adsorption, such as formamide and N-(1-alkoxyethyl)formamide, are separated under mild conditions with a molecular sieve which selectively adsorbs one of the amides, such as formamide. N-vinylformamide can be purified by removing formamide remaining in synthesis process streams using this technique. The adsorbed amide can be desorbed by heating the molecular sieve in either inert or reactive atmospheres. Preferred molecular sieves include the zeolites of types A, X, Y, molecular sieves of the MFI topology, chabazite, and mordenite. Calcium chabazite is particularly versatile and effective.
REFERENCES:
patent: 4139572 (1979-02-01), Miwa et al.
patent: 4334097 (1982-06-01), Schmidt
patent: 4444986 (1984-04-01), Dessau
patent: 4567300 (1986-01-01), Murao et al.
patent: 4575434 (1986-03-01), Frank et al.
patent: 4578515 (1986-03-01), Dawson et al.
patent: 4633018 (1986-12-01), Zinnen
patent: 4714783 (1987-12-01), Zinnen et al.
S. A. Tahoun and M. M. Mortland, "Complexes of Montmorillonite with Primary, Secondary, and Tertiary Amides: I. Protonation of Amides on the Surface of Montmorillonite," Soil Science 102(4), pp. 248-254, and 10(5), pp. 314-321 (1966).
R. M. Barrer, "Zeolites and Clay Minerals as Sorbents and Molecular Sieves," pp. 5-14, Academic Press, (1978).
D. W. Breck, "Adsorption by Dehydrated Zeolite Crystals," Zeolite Molecular Sieves, pp. 633-645 and 699-709, Kruger Publishing Co., Malabar, Florida (1984).
D. M. Ruthven, "Zeolites as Selective Adsorbents," Chemical Engineering Process, pp. 42-50, Feb. 1988.
Coe Charles G.
Gaffney Thomas R.
Listemann Mark L.
Miller Mildred A.
Pierantozzi Ronald
Air Products and Chemicals Inc.
Marsh William F.
Raymond Richard L.
Rodgers Mark L.
Russell Mark W.
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