Light component separation from a carbon dioxide mixture

Details Light component separation from a carbon dioxide mixture Light component separation from a carbon dioxide mixture

2004-11-12

2008-11-25

Jones, Melvin (Department: 3744)

Refrigeration

Cryogenic treatment of gas or gas mixture

Separation of gas mixture

Reexamination Certificate

active

07454923

ABSTRACT:
A method of separating one or more first light components from a carbon dioxide containing gaseous mixture that contains at least 30 mole percent carbon dioxide. In accordance with the method, a feed stream composed of the carbon dioxide is cooled to effect at least in part, liquefaction of the carbon dioxide containing gaseous mixture. The feed stream and a stripping gas stream are introduced into a liquid-vapor contact column to initiate counter-current vapor liquid mass transfer and the formation of a gaseous column overhead stream and a liquid column bottoms stream. The stripping gas stream contains one or more second light components having boiling point lower than that of carbon dioxide and higher than that of the first light component(s) to enrich the gaseous column overhead stream with the first light component(s).

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