METHOD AND APPARATUS FOR SEPARATING A FLOW RICH IN CARBON DIOXIDE BY DISTILLATION TO PRODUCE LIQUID CARBON DIOXIDE

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United States of America Patent

APP PUB NO 20240210106A1
SERIAL NO

18288745

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Abstract

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In a method for separating a flow containing at least 95 mol % of carbon dioxide and at least one impurity lighter than carbon dioxide by distillation, the flow is cooled to a first intermediate temperature between those of the cold end and the hot end of a heat exchange means in order to form a liquid flow at a first temperature and a first pressure and it is split into at least two to form a first fraction and a second fraction, the first fraction is expanded to the pressure of a distillation column, referred to as second pressure, which is lower than the first pressure, and it is sent to an intermediate level of the distillation column, the second fraction is cooled in the heat exchange means to the cold end thereof, it is expanded to the pressure of the distillation column and is sent to a level of the distillation column above the point of arrival of the first fraction, a liquid flow containing at least 99 mol % of carbon dioxide is withdrawn from the bottom of the column, and a fraction of the liquid flow is pressurized in a pump and sent to the top of the column.

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Patent Owner(s)

Patent OwnerAddress
L'AIR LIQUIDE SOCIETE ANONYME POUR L'ETUDE ET L’EXPLOITATION DES PROCEDES GEORGES CLAUDEPARIS

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
LECLERC, Mathieu Champigny Sur Marne, FR 31 53
TRAN, Michael Champigny Sur Marne, FR 47 872

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