Chemistry: electrical and wave energy – Processes and products – Processes of treating materials by wave energy
Patent
1979-08-23
1985-11-19
Kyle, Deborah L.
Chemistry: electrical and wave energy
Processes and products
Processes of treating materials by wave energy
B01D 5900
Patent
active
045540608
ABSTRACT:
Separation of carbon isotopes by photolysis of CS.sub.2 in cryogenic solutions of nitrogen, krypton and argon with 206 nm light from an iodine resonance lamp is reported. The spectral distribution of the ultraviolet absorption depends on solvent. Thus, in liquid nitrogen the photolytic decomposition rate of .sup.13 CS.sub.2 is greater than that of .sup.12 CS.sub.2 (because the absorption of 206 nm radiation is greater for .sup.13 CS.sub.2), whereas in liquid krypton and liquid argon the reverse is true. The shift in ultraviolet spectrum is a general phenomenon readily characterized as a function of solvent polarizability, and exhibits behavior similar to that for vibrational transitions occurring in the infrared.
REFERENCES:
patent: 3923619 (1975-12-01), De Poorter et al.
patent: 4213836 (1980-07-01), Freund et al.
patent: 4220510 (1980-09-01), Brueck et al.
Loree et al., J. Photochem. 10, 359 (1979).
Freund et al., Analyt. Chem. 50, 1260 (1978).
Clark, R. J. H. et al Eds., Advances in Infrared and Raman Spectroscopy vol. II, 1976, p. 50.
Beattie Willard H.
Freund Samuel M.
Holland Redus F.
Maier, II William B.
Caress Virginia
Freund Samuel M.
Gaetjens Paul D.
Hightower Judson R.
Kyle Deborah L.
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