Recirculation of argon sidearm column for fast response

Details Recirculation of argon sidearm column for fast response Recirculation of argon sidearm column for fast response

1999-01-29

2000-06-06

Capossela, Ronald

Refrigeration

Cryogenic treatment of gas or gas mixture

Separation of gas mixture

62656, 62924, F25J 100

Patent

active

060704330

ABSTRACT:
A process for separating mixtures which comprise oxygen, nitrogen, and argon by cryogenic distillation in a distillation system where the system is comprised of a distillation column that produces a nitrogen-enriched stream, an oxygen-enriched stream, and an argon-enriched stream, and a sidearm column which has a sump and receives the argon-enriched stream from the distillation column. During an interruption of flow of the argon-enriched stream into the sidearm column, the liquid inventory in the sidearm column is collected at a point above the sump and recirculated through the sidearm column during re-startup of the sidearm column.

REFERENCES:
patent: 5100447 (1992-03-01), Krishnamurthy et al.
patent: 5255522 (1993-10-01), Agrawal et al.
patent: 5448893 (1995-09-01), Howard et al.
patent: 5505051 (1996-04-01), Darredeau et al.

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