liquefaction and denitrogenation process of a natural gas, liquefied natural gas, nitrogen gas, and installation of liquefaction and denitrogenation of a natural gas.

摘要

A process for liquefaction of and nitrogen extraction from natural gas, an installation for implementation of the process, and gases obtained by this process. In the process, a first top fraction is cooled and liquefied, separated into a second top fraction which is relatively volatile and which provides gaseous nitrogen, and into a second bottom fraction which is withdrawn. The first bottom fraction is cooled in order to provide liquefied natural gas essentially free nitrogen.