METHOD AND DEVICE FOR CRYOGENIC SEPARATION OF A MIXTURE OF CARBON MONOXIDE, HYDROGEN AND METHANE FOR THE PRODUCTION OF CH4

摘要

In a process for separating a mixture of carbon monoxide, hydrogen and methane, the mixture (1) is sent to a washing column (K1), a tank liquid (9) withdrawn from the tank of the column of washing is depleted in hydrogen compared to the mixture and is sent to a stripping column (K2), a tank liquid (15) from the stripping column is sent to a separation column (K3), and a liquid enriched in methane (21) withdrawn from the tank of the separation column is vaporized to form a final product (25).