| 摘要 |
The invention relates to a method for liquefying a hydrocarbon-rich flow (1), especially a natural gas flow, whereby the hydrocarbon-rich flow is liquefied by heat-exchange (E1) against a coolant mixture flow (22). The coolant mixture flow consists of two components, one of the components being part of the hydrocarbon-rich flow to be liquefied and the other component being heavy hydrocarbon, at least propane or propylene. The inventive method is characterized in that prior to cooling (E1) and refrigeration expansion (e, f) of the two components, the coolant mixture is separated (D2) into a higher-boiling (25) and a lower-boiling (23) coolant fraction. |
