Process and apparatus for air separation by rectification

Details Process and apparatus for air separation by rectification Process and apparatus for air separation by rectification

1988-07-11

1989-04-25

Warner, Steven E.

Refrigeration

Processes

Circulating external gas

62 24, 62 33, F25J 304

Patent

active

048244538

ABSTRACT:
In a process and apparatus for air separation by rectification air 1 is preliminarily separated in a first rectification stage 2 of a two-stage rectification column to obtain a nitrogen-rich fraction 4 and an oxygen-rich fraction 8. These two fractions are fed to the second rectification stage 6 and separated into oxygen and nitrogen fractions. An argon-enriched fraction, containing essentially oxygen and argon, is removed from the second rectification stage at an intermediate point and is separated in a raw argon column 10 by rectification into an argon-rich fraction 18 and a liquid fraction 19 containing essentially oxygen. The liquid fraction 19 is fed back into the second rectification stage. Another fraction 22 is removed from the raw argon column above the bottom thereof and is separated in a high-purity oxygen column 23 to produce a high-purity oxygen fraction 25, 26 and a lighter residual fraction 24. An additional nitrogen-rich fraction is removed from the head of the first rectification stage and separated in a high-purity nitrogen column 31 producing a bottom liquid fraction 29, which is fed back to the head of the first rectification stage, and a residual gas fraction 33. A high-purity nitrogen fraction 34 is removed at a point several plates below the head of the first rectification stage.

REFERENCES:
patent: 2280383 (1942-04-01), De Boufre
patent: 3688513 (1972-09-01), Streich et al.
patent: 4137056 (1979-01-01), Golouko
patent: 4433989 (1984-02-01), Erickson
patent: 4578095 (1986-03-01), Erickson
patent: 4604116 (1986-08-01), Erickson

Affiliated with

Also associated with

Rating

Process and apparatus for air separation by rectification does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process and apparatus for air separation by rectification, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process and apparatus for air separation by rectification will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1193297