Multiple reboiler, double column, elevated pressure air separati

Details Multiple reboiler, double column, elevated pressure air separati Multiple reboiler, double column, elevated pressure air separati

1992-02-18

1993-11-02

Capossela, Ronald C.

Refrigeration

Processes

Circulating external gas

62 37, 62 40, F25J 302

Patent

active

052575047

ABSTRACT:
The present invention is a liquid nitrogen reflux means improvement capable of allowing the operation of conventional dual and triple reboiler air separation cycles at elevated pressures. The improvement comprises: (a) heat exchanging a portion of the liquid oxygen bottoms of the second column against a nitrogen vapor stream removed from the higher or lower pressure columns or derived from the gaseous nitrogen product, wherein prior to such heat exchange the pressure of the liquid oxygen bottoms portion or the nitrogen vapor stream or both the pressure of the liquid oxygen bottoms portion and the nitrogen vapor stream is adjusted by an effective amount so that an appropriate temperature difference exists between the liquid oxygen bottoms and the nitrogen vapor stream so that upon heat exchange the nitrogen vapor is totally condensed and the liquid oxygen bottoms portion is at least partially vaporized; (b) utilizing the condensed nitrogen as reflux in at least one of the two distillation columns; and (c) warming the vaporized oxygen to recover refrigeration.

REFERENCES:
patent: 3210951 (1965-10-01), Gaumer
patent: 4224045 (1980-09-01), Olszewski
patent: 4702757 (1987-10-01), Kleinberg
patent: 4732595 (1988-03-01), Yoshino
patent: 4784677 (1988-11-01), Al-Chalabi
patent: 4796431 (1989-01-01), Erickson
patent: 4936099 (1990-06-01), Woodward
patent: 5084081 (1992-01-01), Rohde
patent: 5092132 (1992-03-01), Marshall et al.
patent: 5098456 (1992-03-01), Dray et al.

Affiliated with

Also associated with

Rating

Multiple reboiler, double column, elevated pressure air separati does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Multiple reboiler, double column, elevated pressure air separati, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multiple reboiler, double column, elevated pressure air separati will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1751286