Other features and advantages of the natural gas nitrogen-removal

摘要

In a denitrogenation process of a gaseous mixture comprising at least of the methane and nitrogen, the mixture 1 is separated in order to form a gas 5 is enriched in nitrogen and a liquid 7 which is rich in methane and a part 13 of the liquid enriched in methane is vaporized to form a gas rich in methane and at least a portion of the gas rich in methane, is recycled to the gaseous mixture to be separated, if the nitrogen content of the mixture to be separated exceeds a certain threshold.