Treatment of effluent gases

Details Treatment of effluent gases Treatment of effluent gases

2008-05-06

2008-05-06

Smith, Duane (Department: 1797)

Gas separation: processes

Chromatography

C095S045000, C095S127000, C096S101000, C096S106000, C096S004000, C096S134000

Reexamination Certificate

active

07368000

ABSTRACT:
A method is described for recovering a noble gas, such as xenon or krypton, from a first gas mixture comprising a plurality of components, one of which is the noble gas and the others are typically helium and/or nitrogen, argon, and relatively light fluorocarbons. The gas mixture is first conveyed to a gas chromatography column for separating the noble gas from the other components of the gas mixture. As the noble gas travels relatively slowly through the column, the other components are exhausted from the column before the relatively slow noble gas. Following the exhaust of these other components, a purge gas is supplied to the column to flush the noble gas therefrom. A second gas mixture comprising the noble gas and the purge gas is conveyed from the column to a membrane separator to separate the second gas mixture into a noble gas-rich gas stream and a purge gas-rich gas stream, which may be recirculated back to the column for re-use.

REFERENCES:
patent: 3683589 (1972-08-01), Seitz et al.
patent: 3890121 (1975-06-01), Thomas
patent: 4093429 (1978-06-01), Siegler et al.
patent: 4238204 (1980-12-01), Perry
patent: 4444572 (1984-04-01), Avon et al.
patent: 4562000 (1985-12-01), Ringel
patent: 4747854 (1988-05-01), Maroulis et al.
patent: 5213767 (1993-05-01), Smith et al.
patent: 6168649 (2001-01-01), Jensvold et al.
patent: 2005/0235828 (2005-10-01), Ishihara
patent: 2006/0107831 (2006-05-01), Karwacki et al.
patent: 1 181 310 (1970-02-01), None
patent: 1181310 (1970-02-01), None
Wolfgang Theer, Abstract of DD 257996 A1, “Gas Chromatographic Sepn. of Krypton-Xenon Mixt.—Using Inter-Zone Carrier Gas Feed for Simultaneous Separate Desorption,” Jul. 6, 1988; Dresden Komplette Chemieanlag.
Werner Mages and Karl Baur, Abstract of DD 19641643 A1, “Production of Pure Xenon in an Air Separation Plant,” Apr. 16, 1998; Linde AG.
F. Wolf, Abstract of DD 106332 A1, “Sepn of Argon and Helium—From Gas Mix. Using Zeolite Molecular Sieve Type A Charged with Nitrile Cpd,” Jun. 12, 1974.
United Kingdom Search Report of Application No. GB0503239.6; Date of search: Jun. 2, 2005.

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