METHOD FOR LIQUEFYING NATURAL GAS WITH HIGH PRESSURE FRACTIONING

摘要

The invention relates to a method for liquefying a natural gas that comprises the following steps: cooling a natural gas (1'); feeding the cooled natural gas (1) into a fractioning column (2) so as to separate it into a methane-rich gaseous phase (3, 5) and a liquid phase rich in compounds heavier than ethane (8); and liquefying the methane-rich flow in order to obtain the liquid natural gas (5'). According to the invention, the method comprises selecting the operational conditions of the fractioning column so that said liquid phase includes a methane molar amount representing 10% to 150% of the ethane molar amount.