Use of cryogenic temperatures in processing gases containing...

F - Mech Eng,Light,Heat,Weapons – 25 – J

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F25J 3/02 (2006.01) B01D 53/14 (2006.01) C01B 3/52 (2006.01) C01B 21/04 (2006.01) C07C 7/11 (2006.01) C10L 3/10 (2006.01)

Patent

CA 2557871

A process for separating the components of a multi-component gas stream is disclosed. The multi-component gas stream (1) is contacted with a solvent (7) in an extractor (6) at cryogenic temperatures to produce an overhead stream (9) enriched with unabsorbed component(s) and a rich solvent bottoms stream (8) enriched with absorbed component(s). The rich solvent bottoms stream is then flash evaporated (11) to regenerate the lean solvent (15) and to recover the absorbed component(s) as an overhead stream (14), which is compressed to produce a product stream. The regenerated solvent is recycled to the extractor.

L'invention concerne un procédé de séparation des constituants d'un flux de gaz multi-constituant. Le flux de gaz (1) multi-constituant est mis en contact avec un solvant (7) dans un extracteur (6) à des températures cryogéniques afin de produire un flux supérieur (9) enrichi en constituant(s) non absorbé(s) et un flux de résidus de fond (8) à solvant riche enrichi en constituant(s) absorbé(s). Le flux de résidus de fond à solvant riche est alors soumis à une évaporation éclair (11) afin de régénérer le solvant pauvre (15) et afin de récupérer le constituant/les constituants absorbé/absorbés sous la forme d'un flux supérieur (14), lequel est comprimé pour produire un flux de produit. Le solvant régénéré est recyclé dans l'extracteur.

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