Lower pressure fractionation of waste gas from ammonia synthesis

Details Lower pressure fractionation of waste gas from ammonia synthesis Lower pressure fractionation of waste gas from ammonia synthesis

1982-12-14

1984-09-25

Sever, Frank

Refrigeration

Processes

Circulating external gas

62 31, 62 34, 62 39, 62 41, 62 42, F25J 304

Patent

active

044733852

ABSTRACT:
In a low temperature process for the fractionation of ammonia synthesis waste gas (N.sub.2, H.sub.2, Ar, CH.sub.4) comprising two successive separating stages and a nitrogen refrigeration cycle for supplying reboiler heat to each of the stages and also liquid nitrogen, wherein nitrogen is compressed in a compressor to a final pressure, cooled, expanded, and partially liquefied, gaseous and revaporized liquid nitrogen being recompressed, the improvement comprising compressing the nitrogen to a medium pressure, e.g., 6-20 bar, withdrawing a portion of resultant medium-pressure nitrogen from the compressor, compressing remaining medium-pressure nitrogen to the final pressure, e.g., 30-50 bar, cooling resultant medium-pressure nitrogen in parallel with resultant final-pressure nitrogen, further cooling the medium-pressure nitrogen by supplying reboiler heat to the two separating columns, expanding resultant cooled medium-pressure nitrogen to at least partially liquefy the same, expanding resultant cooled final-pressure nitrogen to at least partially liquefy the same, and combining both resultant at least partially liquefied nitrogen streams in a phase separator.

REFERENCES:
patent: 3327487 (1967-06-01), Karwat

Affiliated with

Also associated with

Rating

Lower pressure fractionation of waste gas from ammonia synthesis does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Lower pressure fractionation of waste gas from ammonia synthesis, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Lower pressure fractionation of waste gas from ammonia synthesis will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1768240