Method and apparatus for purification of a mixture rich in carbon dioxide at low temperature

In a method for purifying of a mixture containing the low temperature carbon dioxide to produce a fluid rich in carbon dioxide, rich in carbon dioxide mixture is cooled in a first heat exchanger brazed aluminum plates (9 ), consisting of wave plates separated by mat, at least one fluid (19) derived from the cooled mixture is sent to a purification step comprising a distillation step and / or at least two successive stages of partial condensation, the purification step produces a gas depleted in carbon dioxide (25) which is heated in the first exchanger, the purification step produces a liquid rich in carbon dioxide (33) which is expanded and sent to a second heat exchanger ( 35) where it is heated by means of a fluid (13) method, the heat exchanger performing indirect heat exchange between only the liquid rich in carbon dioxide and the fluid u process the rich liquid carbon dioxide vaporises at least partially in the second exchanger and the vaporized gas formed is heated in the first exchanger to form a high carbon dioxide gas (37) may be the final product of the process .