Gas separation – Means within gas stream for conducting concentrate to collector
Patent
1988-12-22
1990-05-08
Spitzer, Robert
Gas separation
Means within gas stream for conducting concentrate to collector
55197, 55208, 55270, 55386, B01D 1508
Patent
active
049234862
ABSTRACT:
Gas chromatographic methods and apparatus are disclosed whereby improved separation times and efficiency are achieved by provision of a time-programmable curvilinearly-shaped negative temperature gradient along the length of the chromatographic column. The gas phase sample traveling through the column always passes to a column zone having a lower temperature than the previous column zone. Accordingly, upon elution, sample bandwidths are compressed. Separation times may be decreased when compared to conventional isothermal or temperature programmed gas chromatography.
REFERENCES:
patent: 3043127 (1962-07-01), De Ford et al.
patent: 3043128 (1962-07-01), Ayers
patent: 3057183 (1962-10-01), De Ford
patent: 3146616 (1964-09-01), Loyd
patent: 3149941 (1964-09-01), Barnitz et al.
patent: 3225521 (1965-12-01), Burow
patent: 3438243 (1969-04-01), Parks, Jr. et al.
patent: 3449938 (1969-06-01), Giddings
patent: 3486299 (1969-12-01), Weiser, Jr. et al.
patent: 3538744 (1970-11-01), Karasek
patent: 3581465 (1971-06-01), Haruki et al.
patent: 3949806 (1976-04-01), Dunges
patent: 4042350 (1977-08-01), Phillips
patent: 4067227 (1978-01-01), Johns et al.
patent: 4181508 (1980-01-01), Schmid et al.
patent: 4293415 (1981-10-01), Bente III et al.
patent: 4376641 (1983-03-01), Nestrick et al.
patent: 4484061 (1984-11-01), Zelinka et al.
patent: 4726822 (1988-02-01), Cates et al.
Nogare et al., "Programmed Temperature Gas Chromatography", Analytical Chemistry, vol. 32, No. 7, Jun. 1960, pp. 767-770.
"Multidimensional High Resolution Gas Chromatographic Investigations of Hydrocarbon Fuels and Various Turbine Engine Fuel Precursors", Wayne A. Rubey.
"New Variant of Chromathermography", Institute of Petrochemical Synthesis, Academy of Sciences of the USSR,Zavodskaya Laboratoriya, vol. 36, No. 11, pp. 1299-1301, Nov. 1970, Berezkin et al.
"Temperature Gradients in Gas Chromatography", Journal of Chromatography, 373, pp. 21-44 (1986), Berezkin et al.
"New Method of Thermochromatographic Analysis", Zavodskaya Laboratoriya, vol. 45, No. 12, pp. 1082-1084, Dec. 1979, Zizin et al.
"Chromathermodistillation and Overloaded Chromathermography", Yanovskii et al, Russian Journal of Physical Chemistry, 55(7), pp. 1024-1026 (1981).
"Application of Chromatography for the Determination of Impurities", Berezkin et al, Chromatographia, vol. 8, No. 8, pp. 395-398, Aug. 1975.
"Chromatographie en Phase Gazeuse Realisee Simultanement avec une Programmation de Temperature et une Programmation du Gradient Longitudinal Negatif De Parametres--Theorie de la Reetention et Influence des Parametres", Coudert et al, J. Chromatogr. 58 (1971) 159-167.
Spitzer Robert
University of Dayton
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