Seperation of carbon monoxide from nitrogen-contaminated gaseous

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

1999-01-04

2000-05-16

Capossela, Ronald

Refrigeration

Cryogenic treatment of gas or gas mixture

Separation of gas mixture

62632, 62920, F25J 100

Patent

active

060620420

ABSTRACT:
Carbon monoxide is separated from a gaseous mixture containing hydrogen and contaminated with nitrogen by separating hydrogen and carbon monoxide contents to provide a carbon monoxide-enriched nitrogen-containing stream and separating carbon monoxide and nitrogen contents of said stream in a nitrogen-separation column to provide a nitrogen-enriched overheads vapor and a nitrogen-freed bottoms liquid. The overheads vapor is washed with liquid nitrogen to remove carbon monoxide therefrom and the resultant carbon monoxide-enriched liquid nitrogen is returned to said column as additional reflux. The liquid nitrogen wash simultaneously reduces the loss of carbon monoxide with the nitrogen-enriched vapor and provides refrigeration to the process. When the gaseous feed is a synthesis gas also containing methane, the methane and carbon monoxide contents can be separated before or after separation of the nitrogen and carbon monoxide contents.

REFERENCES:
patent: 4311496 (1982-01-01), Fabian
patent: 4478621 (1984-10-01), Fabian
patent: 5351491 (1994-10-01), Fabian
patent: 5351492 (1994-10-01), Agrawal et al.
patent: 5359857 (1994-11-01), Honda

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