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US 2019/0056176 A1Published application
Process and device for the cryogenic separation of synthesis gas
AssigneeLinde Aktiengesellschaft
InventorMartin LANG
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AssigneeLinde Aktiengesellschaft
InventorMartin LANG
Estimating the term…
The invention relates to a process and device for the cryogenic separation of a methane-containing feed gas predominantly consisting of hydrogen and carbon monoxide, that is partially condensed in this case by cooling, in order to obtain a hydrogen-containing first liquid phase predominantly consisting of carbon monoxide and methane, from which first liquid phase, in an H2 separation column that is heated via a circulation heater, a second liquid phase is generated by separating off hydrogen, from which second liquid phase, in a CO/CH4 separation column, a carbon monoxide-rich gas phase is obtained having a purity that permits release thereof as carbon monoxide product. It is characteristic in this case that a low-methane material stream is withdrawn from the H2 separation column and is then applied to the CO/CH4 separation column as reflux.
Process for the cryogenic separation of a methane-containing feed gas (1) predominantly consisting of hydrogen and carbon monoxide, that is partially condensed in this case by cooling, in order to obtain a hydrogen-containing first liquid phase (5) predominantly consisting of carbon monoxide and methane, from which first liquid phase, in an H2 separation column (T1) that is heated via a circulation heater (8), a second liquid phase (11) is generated by separating off hydrogen (9), from which second liquid phase, in a CO/CH4 separation column (T2), a carbon monoxide-rich gas phase (28) is obtained having a purity that permits release thereof as carbon monoxide product (29), characterized in that a low-methane material stream (26, 34) is withdrawn from the H2 separation column (T1) and is then applied to the CO/CH4 separation column (T2) as reflux.
Device for the cryogenic separation of a methane-containing feed gas (1) predominantly consisting of hydrogen and carbon monoxide, having at least one heat exchanger (E1, E2) for cooling and partial condensation of the feed gas (1), a separator (D1) in which a first liquid phase (5) can be separated off from the partially condensed feed gas (2), an H2 separation column (T1) that is heatable via a circulation heater (8) and in which a second liquid phase (11) can be generated from the first liquid phase (5) by separating off hydrogen (9), and also a CO/CH4 separation column (T2), in which a carbon monoxide-rich gas phase (28) can be separated off from the second liquid phase (11) at a purity that permits release thereof as carbon monoxide product (29), characterized in that the H2 separation column (T1) is connected to the CO/CH4 separation column (T2) in such a manner that a low-methane material stream (26, 34) can be withdrawn from the H2 separation column (T1) via a take-off site and can be applied to the CO/CH4 separation column (T2) as reflux.
Dependencies are inferred from the claim text.