Process for the separation of air

Details Process for the separation of air Process for the separation of air

1986-05-30

1987-05-05

Capossela, Ronald C.

Refrigeration

Processes

Circulating external gas

62 39, 62 43, F25J 500

Patent

active

046629165

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 feed air stream is expanded to provide work, which is used to drive an auxiliary compressor for feed air substream compression.

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patent: 2627731 (1953-02-01), Benedict
patent: 2982108 (1961-05-01), Grunberg et al.
patent: 3492828 (1976-02-01), Ruckborn
patent: 3736762 (1973-06-01), Toyama et al.
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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