Distillative separations of gas mixtures containing methane, car

Details Distillative separations of gas mixtures containing methane, car Distillative separations of gas mixtures containing methane, car

1983-03-18

1984-07-31

Sever, Frank

Refrigeration

Processes

Circulating external gas

55 68, 62 20, 62 28, F25J 304

Patent

active

044628145

ABSTRACT:
Distillative separations of hydrocarbon feed mixtures containing at least methane and carbon dioxide, as well as other components, such as ethane, higher hydrocarbons, and hydrogen sulfide are disclosed. In the separations described, methane is preferably separated from an acid gas under conditions of composition, temperature and pressure which would normally produce acid gas solids. Acid gas solids are prevented by adding a liquid solids-preventing agent into this distillation column. A second distillation column is subsequently employed to further separate the feed gas mixture. The second distillation column is operated under conditions which an azeotrope would normally form between the light hydrocarbon and carbon dioxide, which azeotrope would limit the carbon dioxide overhead composition. The azeotrope is prevented by introducing an agent for preventing azeotrope formation. Alternatively, the second distillation column may be operated to separate carbon dioxide from hydrogen sulfide. In this case, a liquid agent is added to the second distillation column to increase the relative volatility of carbon dioxide to hydrogen sulfide. All liquid agents preferably comprise a C.sub.3 -C.sub.6 alkane, such as butane, or a mixture of such alkanes.

REFERENCES:
patent: 3983711 (1976-10-01), Solomon
patent: 4097250 (1978-06-01), Pagani et al.
patent: 4115086 (1978-09-01), Jordon
patent: 4185978 (1980-01-01), McGalliard
patent: 4311495 (1982-01-01), Styring

Affiliated with

Also associated with

Rating

Distillative separations of gas mixtures containing methane, car does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Distillative separations of gas mixtures containing methane, car, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Distillative separations of gas mixtures containing methane, car will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-184043