Gas separation – Means within gas stream for conducting concentrate to collector
Patent
1992-04-15
1993-06-01
Spitzer, Robert
Gas separation
Means within gas stream for conducting concentrate to collector
55197, 55208, 55386, B01D 1508
Patent
active
052155560
ABSTRACT:
Apparatus and method for temperature gradient capillary gas chromatography wherein the chromatography column is surrounded by an inner tube and the inner tube is surrounded by an outer tube. A first heat transfer fluid is heated to a first temperature and is flowed between the inner tube and the column in the same direction as the flow of carrier gas through the capillary column. A second heat transfer fluid is heated to a second temperature and is flowed in the opposite direction between the outer tube and the inner tube, the second temperature being lower than the first temperature. The invention is also an improved capillary gas chromatography method of the type that generally includes the steps of flowing a carrier gas through a capillary gas chromatography column to a detector, introducing a sample to be analyzed into the column and then detecting chromatographically resolved components of interest of the sample, the method having an optimum carrier gas velocity through the column, wherein the improvement of the instant invention is to establish a negative temperature gradient along at least a portion of the longitudinal length of the capillary gas chromatography column and to flow the carrier gas through the capillary gas chromatography column at less than the optimum carrier gas velocity.
REFERENCES:
patent: 2377900 (1945-06-01), Podbielniak
patent: 3035383 (1962-05-01), Sanford et al.
patent: 3043127 (1962-07-01), DeFord et al.
patent: 3057183 (1962-10-01), DeFord
patent: 3146616 (1964-09-01), Loyd
patent: 3152470 (1964-10-01), Reinecke et al.
patent: 3225520 (1965-12-01), Burow
patent: 3225521 (1965-12-01), Burow
patent: 3309504 (1967-03-01), Rosso et al.
patent: 3440397 (1969-04-01), Vesper et al.
patent: 3449938 (1969-06-01), Giddings
patent: 3926800 (1975-12-01), Stephens
patent: 4004881 (1977-01-01), Ligon, Jr.
patent: 4484061 (1984-11-01), Zelinka et al.
patent: 4872334 (1989-10-01), Watanabe
patent: 4923486 (1990-05-01), Rubey
patent: 5028243 (1991-07-01), Rubey
patent: 5114439 (1992-05-01), Yast et al.
Gas-Liquid Chromathermography, Analytical Chemistry, vol. 32, No. 3, Mar. 1960, pp. 436-437 A. Glenn Nerheim.
Temperature Gradients in Gas Chromatography, Journal of Chromatography, 373 (1986) 21-44, V. G. Berezkin et al.
Hiller Joseph F.
Hughes Glen H.
Martin Daniel P.
Snyder Ronald J.
Spitzer Robert
Stevens Timothy S.
The Dow Chemical Company
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