Gas separation – Means within gas stream for conducting concentrate to collector
Patent
1977-07-18
1978-12-12
Spitzer, Robert H.
Gas separation
Means within gas stream for conducting concentrate to collector
55 48, 55 66, B01D 5316
Patent
active
041294254
ABSTRACT:
This invention is an improved gas-absorption process for the recovery of a desired component from a feed-gas mixture containing the same. In the preferred form of the invention, the process operations are conducted in a closed-loop system including a gas-liquid contacting column having upper, intermediate, and lower contacting zones. A liquid absorbent for the desired component is circulated through the loop, being passed downwardly through the column, regenerated, withdrawn from a reboiler, and then recycled to the column.
A novel technique is employed to concentrate the desired component in a narrow section of the intermediate zone. This technique comprises maintaining the temperature of the liquid-phase input to the intermediate zone at a sufficiently lower value than that of the gas-phase input to the zone to effect condensation of a major part of the absorbent-vapor upflow to the section. This establishes a steep temperature gradient in the section. The stripping factors below this section are selected to ensure that virtually all of the gases in the downflowing absorbent from the section are desorbed. The stripping factors above the section are selected to ensure re-dissolution of the desired component but not the less-soluble diluent gases. As a result, a peak concentration of the desired component is established in the section, and gas rich in that component can be withdrawn therefrom.
The new process provides important advantages. The chief advantage is that the process operations can be conducted in a single column in which the contacting zones operate at essentially the same pressure.
REFERENCES:
patent: 1853330 (1932-04-01), Barstow et al.
patent: 2661812 (1953-12-01), Gilmore
patent: 2764532 (1956-09-01), Rauh
patent: 2849371 (1958-08-01), Gilmore
patent: 3505784 (1970-04-01), Hochgesand et al.
patent: 3762133 (1973-10-01), Merriman et al.
patent: 3785120 (1974-01-01), Merriman et al.
patent: 3887339 (1975-06-01), Robertson
McCabe et al., Unit Operations of Chemical Eng., 2nd Edition, 1967, pp. 648-652, 672-674.
Shreve, Chemical Process Industries, 3rd Edition, 1967, pp. 107-116.
King, Separation Processes, 1971, pp. 334-339, 341-344, 347-350.
Eby Robert S.
Stephenson Michael J.
Carlson Dean E.
Hamel Stephen D.
Lewis Fred O.
Spitzer Robert H.
The United States of America as represented by the United States
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