Separation process and installation of a gas mixture...

Details Separation process and installation of a gas mixture... Separation process and installation of a gas mixture...

F - Mech Eng,Light,Heat,Weapons

25

J

F25J 3/02 (2006.01)

Patent

CA 2429319

The invention concerns a method and an installation for separating a gas mixture and gases obtained by said installation. The invention concerns a method and an installation for cryogenic separation of constituents of a natural gas under pressure (14) with a first phase separator (B1) whereof the constituents of each of the phases are separated in a distillation column (C1). Part of the gas fraction (5) derived from the head of the column (C1) is recycled at the last stage thereof. The method further comprises diverting (9) part of a first head fraction (3) derived from the first phase separator. Additionally, the method comprises separating a first base fraction (4) derived from the first separator, in a second separator (B2). The invention also relates to other embodiments.

Procédé et installation de séparation d'un mélange gazeux et gaz obtenus par cette installation. La présente invention concerne un procédé et une installation de séparation cryogénique des constituants d'un gaz naturel sous pression (14) par un premier séparateur de phases (B1) dont les constituants de chacune des phases sont séparés dans une colonne de distillation (C1). Une partie de la fraction gazeuse (5) issue de la tête de la colonne (C1) est recyclée au dernier étage de celle-ci. Le procédé comprend en outre la dérivation (9) d'une partie d'une première fraction de tête (3) issue du premier séparateur de phase. Le procédé comprend de plus la séparation d'une première fraction de pied (4) issue du premier séparateur, dans un second séparateur (B2). D'autres modes de réalisation sont également décrits.

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