Separation of H.sub.2, CO, and CH.sub.4 synthesis gas with metha

Details Separation of H.sub.2, CO, and CH.sub.4 synthesis gas with metha Separation of H.sub.2, CO, and CH.sub.4 synthesis gas with metha

1976-10-06

1978-07-25

Yudkoff, Norman

Refrigeration

Processes

Circulating external gas

62 28, 62 26, 62 31, 55 68, F25J 302

Patent

active

041026594

ABSTRACT:
A process for separation of a synthesis feed gas mixture containing hydrogen, carbon monoxide and methane. The feed gas mixture is countercurrently contacted with methane wash liquid in a first adsorption zone and the recovered absorber bottoms liquid is contacted with hydrogen rich vapor in a second adsorption zone to recover residual hydrogen gas as overhead. Hydrogen rich vapor is generated for the second absorption zone by vaporization of second absorption zone bottoms liquid, with the bottoms liquid recovered from the second absorption zone being fractionated to recover carbon monoxide overhead gas. The process achieves the rejection of hydrogen impurity in the second absorption and associated vaporization steps with minimum degradation of refrigeration temperature levels in the process and high recovery of carbon monoxide product.

REFERENCES:
patent: 3886756 (1975-06-01), Allam et al.

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