Refrigeration – Processes – Circulating external gas
Patent
1987-05-06
1988-07-19
Warner, Steven E.
Refrigeration
Processes
Circulating external gas
62 27, 62 29, 62 33, 62 39, F25J 302
Patent
active
047582588
ABSTRACT:
An improved process for cryogenically separating a helium-bearing natural gas stream comprising subjecting the natural gas stream to a sequence of alternating cooling and separating steps wherein one or more process-derived streams are utilized to effect cooling of the natural gas streams to temperatures in the cryogenic range. The process provides for the separation and recovery of a natural gas liquids product stream consisting substantially of condensed C.sub.2 and higher hydrocarbons and a gaseous product stream consisting of at least 50 volume percent of helium with the balance being substantially nitrogen.
REFERENCES:
patent: 3512368 (1970-05-01), Harper
patent: 3740962 (1973-06-01), Fan
patent: 3805537 (1974-04-01), Forg et al.
patent: 4305733 (1981-12-01), Scholz et al.
patent: 4312652 (1962-01-01), Mikulla
Kirk-Othmer Encyclopedia of Chemical Technology, vol. 10, pp. 872-873, 2ed (1966).
"Helium Production at the Bureau of Mines Keyes, Okla. Plant" by W. M. Deaton and R. D. Hayes and appearing in Bureau of Mines Information Circular, IC 8018 (1966).
"A New Approach to Helium Recovery" appearing in Kellogram, pp. 4-5, Issue No. 3, (M. W. Kellogg Co., 1963).
Perry's Chemical Engineering Handbook, Section 12, pp. 29-30, 4th Ed. (1963).
Mitchell E. Keith
Reed Donald N.
Rodkey Thomas L.
Addison William G.
Kerr-McGee Corporation
Ward John P.
Warner Steven E.
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