Refrigeration – Processes – Circulating external gas
Patent
1982-09-09
1984-04-24
Sever, Frank
Refrigeration
Processes
Circulating external gas
62 31, 62 34, 62 39, F25J 302
Patent
active
044445776
ABSTRACT:
Higher boiling constituents are separated from a normally gaseous feed mixture, predominating in lower boiling constituents and containing significant amounts of such higher boiling constituents, such as natural gas by fractionally distilling a feed mixture having a temperature substantially below atmospheric temperature at a pressure substantially above atmospheric pressure at which temperature and pressure the feed mixture comprises both vapor and liquid phases to produce a first vapor phase substantially enriched in lower boiling constituents and a first liquid phase substantially enriched in higher boiling constituents, expanding at least a part of the first vapor phase to reduce the pressure and temperature and produce an expanded fluid stream comprising a second vapor phase and a second liquid phase, separating the second vapor phase from the second liquid phase, recycling the second liquid phase to the fractional distillation step as a reflux, recovering the second vapor phase as a product and recovering the first liquid phase as a product. In another embodiment, at least a part of the feed mixture is expanded prior to fractional distillation. In other embodiments, the feed mixture is separated into a vapor phase and a liquid phase and at least a part of the vapor phase is expanded and/or the feed mixture is first cooled by indirect heat exchange with the second vapor phase prior to recovery of the latter as a product.
REFERENCES:
patent: 3702541 (1972-11-01), Randall et al.
patent: 4040806 (1977-08-01), Kennedy
patent: 4274850 (1981-06-01), Becker
Phillips Petroleum Company
Sever Frank
LandOfFree
Cryogenic gas processing does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Cryogenic gas processing, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cryogenic gas processing will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-114004