A method for preparing pure, gaseous carbon dioxide and an apparatus to be used therewith.

摘要

The invention relates to a method for preparing pure, gaseous CO2 from a gaseous CO2-containing product (2) having a lower degree of purity than the final product, by compressing (4) and cooling (5) the gaseous basic material, whereupon the gaseous impurities are discharged and the purified liquid CO2 (27) is used as a cooling medium for cooling the gas mixture which is used as the basic material, whereby the gas mixture is compressed (8) to a pressure of 40 - 65 bar before the cooling step (12) is carried out. The invention furthermore relates to an apparatus for carrying out this method.