Separation of carbon monoxide from nitrogen-contaminated gaseous

Details Separation of carbon monoxide from nitrogen-contaminated gaseous Separation of carbon monoxide from nitrogen-contaminated gaseous

1999-01-29

2000-06-06

Doerrler, William

Refrigeration

Cryogenic treatment of gas or gas mixture

Separation of gas mixture

62920, F25J 302

Patent

active

060704306

ABSTRACT:
Carbon monoxide is separated from a gaseous mixture containing hydrogen and carbon monoxide and contaminated with nitrogen by partially condensing the mixture to provide a hydrogen-enriched vapor feed fraction and a carbon monoxide-enriched liquid feed fraction; separating nitrogen from carbon monoxide in said liquid fraction in a distillation column to provide nitrogen-freed liquid carbon monoxide bottoms and nitrogen-enriched vapor overheads; condensing at least a portion of said overheads against a recycle heat pump stream derived from said gaseous mixture and containing hydrogen and carbon monoxide; and returning at least a portion of said condensed overheads to said nitrogen-separation column as reflux. The recycle heat pump stream usually is provided by condensation from the hydrogen-enriched vapor feed fraction and/or by separation from the carbon monoxide-enriched liquid feed fraction.

REFERENCES:
patent: 4217759 (1980-08-01), Shenoy
patent: 4478621 (1984-10-01), Fabian
patent: 5832747 (1998-11-01), Bassett et al.

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