Gas separation – Means within gas stream for conducting concentrate to collector
Patent
1980-11-04
1982-03-30
Adee, John
Gas separation
Means within gas stream for conducting concentrate to collector
55 48, 55 55, B01D 3500
Patent
active
043222250
ABSTRACT:
In accordance with the present invention a normally gaseous feed mixture, having a temperature of essentially atmospheric temperature and a pressure substantially above atmospheric pressure, is cooled to a lower temperature sufficient to liquefy a portion of the feed mixture, the cooled feed mixture is separated into a first vapor phase and a first liquid phase, the first vapor phase is further cooled to a temperature sufficiently low to liquefy a portion of the first vapor phase, the cooled first vapor phase is separated into a second vapor phase and a second liquid phase, the pressures of the first liquid phase and the second liquid phase are separately reduced to a pressure sufficiently low to flash portions of the liquid phases, the reduced-pressure, first liquid phase is introduced into the lower portion of a third separation step while the reduced-pressure, second liquid phase is introduced into the upper portion of the third separation step, in which the reduced-pressure, first and second liquid phases are simultaneously separated to produce a third vapor phase and a third liquid phase, at least a portion of the second vapor phase is expanded to a pressure approximately the same as the reduced pressures of the first and second liquid phases but sufficiently low to liquefy a portion of the second vapor phase, the expanded second vapor phase, the remaining portion of the second vapor phase, if any, and the third vapor phase are introduced into the upper portion of a fourth separation step and the third liquid phase is introduced into the fourth separation step at a point below the previously mentioned upper portion of the fourth separation step and the streams introduced into the fourth separation step are simultaneously separated to produce a fourth liquid product enriched in higher boiling components and a fourth vapor product enriched in lower boiling components.
REFERENCES:
patent: Re16052 (1925-04-01), Schill et al.
patent: 2663669 (1953-12-01), Barnes
patent: 2821502 (1958-01-01), Gillett et al.
Bellinger Robert M.
Gray Michael L.
Adee John
Phillips Petroleum Company
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