FIELD: chemistry.
SUBSTANCE: invention relates to a method for treating a gas mixture by a separation technique. Method for treating a gas mixture that is formed from a product stream of a reactor for synthesizing dimethyl ether from a synthesis gas and which contains dimethyl ether, carbon dioxide and another component that is lower boiling than carbon dioxide, includes cooling the gas mixture at a first pressure level from a first temperature level to a second temperature level and washing the fraction of the gas mixture that remains in the gaseous state at the second temperature level in the absorption column by reflux, advantageously containing carbon dioxide, wherein the reflux is partially formed from the fraction of the gas mixture which is separated in the liquid state during the cooling process.
EFFECT: invention provides an efficient treatment of the gas mixture to produce dimethyl ether.
12 cl, 2 dwg
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Authors
Dates
2018-10-09—Published
2015-01-07—Filed