Process and device for treating a gas by refrigeration and conta

Details Process and device for treating a gas by refrigeration and conta Process and device for treating a gas by refrigeration and conta

1997-12-19

1999-11-09

Kilner, Christopher B.

Refrigeration

Cryogenic treatment of gas or gas mixture

Separation of gas mixture

62635, 62929, F25J 300

Patent

active

059791802

ABSTRACT:
Process for treating a gas comprising one or more constituents to be separated, wherein the gas to be processed (G) is mixed at least partly with a solvent S selected to selectively retain at least part of the gas constituents to be separated, the mixture of gas (G) and of solvent (S) is cooled by circulating in at least one heat exchange zone so as to obtain, at the outlet of said heat exchange zone, at least a gas phase (G.sub.1) depleted in at least one of the constituents to be separated and a solvent phase (S.sub.1) enriched in said constituents, said enriched solvent phase (S.sub.1) is separated from said gas phase (G.sub.1) and it is recycled to the heat exchange zone in order to cool said gas-solvent mixture (stage b), said solvent phase (S.sub.1) consisting, at the outlet of the heat exchange zone, of at least a gas phase (G.sub.2) enriched in the constituents to be separated and of a liquid solvent phase (S), the gas phase (G.sub.2) and the liquid solvent phase (S) from stage (c) are separated and the solvent phase at least freed of the constituent(s) is recycled to the initial mixing stage.

REFERENCES:
patent: 3824766 (1974-07-01), Valentine et al.
patent: 4528002 (1985-07-01), Linde

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