Air separation process

Details Air separation process Air separation process

1986-05-30

1987-05-05

Capossela, Ronald C.

Refrigeration

Processes

Circulating external gas

62 18, 62 39, 62 43, F25J 500

Patent

active

046629181

ABSTRACT:
A process is set forth for the separation of air by cryogenic distillation in a single column to produce a nitrogen product and an oxygen-enriched product. In the process, at least a portion of the nitrogen product is compressed and recycled to provide reboil at the bottom of the distillation column and to provide some additional reflux to the upper portion of the column. In addition, part of the compressed nitrogen recycle stream is expanded to provide work.

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patent: 4222756 (1980-09-01), Thorogood
patent: 4303428 (1981-12-01), Vandenbussche
patent: 4400188 (1983-08-01), Patel et al.
patent: 4410343 (1983-10-01), Ziemer
patent: 4464188 (1984-08-01), Agrawal et al.

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