Cryogenic adjustment of hydrogen and carbon monoxide content of

Refrigeration – Cryogenic treatment of gas or gas mixture – Separation of gas mixture

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62920, 62931, F25J 100

Patent

active

058327479

ABSTRACT:
The molar ratio of hydrogen and carbon monoxide in synthesis gas is changed by partially condensing at least a portion of the feed gas and separating the partially condensed feed mixture by non-fractionating phase separation. Preferably, the partially condensed feed mixture is separated by a first phase separation into a first liquid stream and a first vapor stream; the first vapor stream is partially condensed and separated by a second phase separation into a second liquid stream and a second vapor stream; the second vapor stream is warmed and expanded to provide refrigeration and partial condensation; and the expanded partially condensed stream is separated by a third phase separation to provide a third liquid stream and a third vapor stream. The synthesis gas product is at least partially derived from the third liquid stream and a portion of the third vapor stream.

REFERENCES:
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patent: 4525187 (1985-06-01), Woodward et al.
patent: 4566886 (1986-01-01), Fabian et al.
patent: 5351491 (1994-10-01), Fabian
patent: 5609040 (1997-03-01), Billy et al.

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