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

WIPO Patent Application WO/2022/228764

A1

In a method for separating a flow (0) containing at least 95 mol% of carbon dioxide and at least one impurity lighter than carbon dioxide by distillation, the flow (1) is cooled to a first intermediate temperature between those of the cold end and the hot end of a heat exchange means (10) 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 (7) and a second fraction (9), the first fraction is expanded to the pressure of a distillation column (20), 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column above the point of arrival of the first fraction, a liquid flow containing at least 99 mol% of carbon dioxide is withdrawn from the bottom of the column, and a fraction (3) of the liquid flow is pressurised in a pump (PI) and sent to the top of the column.

WO/2003/004951	METHOD FOR THE LIQUEFACTION AND DENITROGENATION OF NATURAL GAS, SYSTEM FOR CARRYING OUT SAID METHOD
JPH07139876	REFINING METHOD FOR KRYPTON AND XENON
WO/2009/083227	METHOD AND DEVICE FOR SEPARATING OFF LOW-BOILING COMPONENTS FROM HYDROCARBON MIXTURES

TRAN MICHAEL (FR)
LECLERC MATHIEU (FR)

PCT/EP2022/056139

November 03, 2022

March 10, 2022

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AIR LIQUIDE (FR)

F25J3/02; F25J3/08

JPS5520206A	1980-02-13
FR2975478A1	2012-11-23
US20130111949A1	2013-05-09
EP3315463A1	2018-05-02
US20200318897A1	2020-10-08
FR2100737A1	1972-03-24

MERCEY, Fiona (FR)

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