Method of liquefying a natural gas with two interconnected stages

摘要

Method of liquefying a natural gas wherein a first coolant mixture M1 is used for the first cooling stage and a second coolant mixture M2 for the second cooling stage, said mixture M2 being cooled in the first cooling stage by means of the first coolant mixture (by vaporization after expansion) in order to obtain a condensed, single-phase mixture M2 at the outlet and in that mixture M2 is vaporized to cool the second cooling stage at least partially.