| 摘要 |
A method is described of liquefying a hydrocarbon-rich fraction 1, in particular natural gas, where the hydrocarbon-rich fraction which is to be liquefied is cooled and liquefied against a coolant mixture. The coolant mixture, before its cooling, is separated 'D' into a gas phase 5 and a liquid phase 6. The gas and the liquid phases are cooled 'E' separately, and not until after cooling has been performed, are they expanded 'a', 'b' and recombined 8. Preferably, the coolant mixture comprises the components nitrogen, methane, ethane, ethylene, propane, butane and/or pentane. Parts of the gaseous or liquefied hydrocarbon-rich fraction may be added to the coolant mixture to replace selected components, such as methane or nitrogen. |
