Air separation method and apparatus to produce nitrogen

Details Air separation method and apparatus to produce nitrogen Air separation method and apparatus to produce nitrogen

1995-05-31

1996-04-16

Capossela, Rondald C.

Refrigeration

Processes

Circulating external gas

62 39, F25J 302

Patent

active

055071481

ABSTRACT:
An air separation method and apparatus for producing nitrogen is provided in which oxygen enriched liquid, produced as a column bottoms of a distillation column, is partially vaporized and phase separated. The vapor phase is expanded to provide refrigeration while the liquid phase, after pressure reduction, is introduced into the head condenser to condense reflux to the column. Alternatively, part of the oxygen enriched liquid can be fully vaporized and then expanded to provide refrigeration. In such case, another part of the oxygen enriched liquid can be used to condense reflux to the column. Part of the air to be separated is liquefied against the oxygen enriched liquid to be vaporized and then introduced into a lower portion of the column to maintain production and purity levels that would have been obtained had all the oxygen enriched liquid stream been used in condensing reflux to the column.

REFERENCES:
patent: 4843828 (1989-07-01), Gladman
patent: 5163296 (1992-11-01), Ziemer et al.
patent: 5349822 (1994-09-01), Nagamura et al.
patent: 5396772 (1995-03-01), McKeigue et al.

Affiliated with

Also associated with

Rating

Air separation method and apparatus to produce nitrogen does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Air separation method and apparatus to produce nitrogen, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Air separation method and apparatus to produce nitrogen will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-317983