| 摘要 |
Disclosed is a method for separating an N-rich fraction from a liquefied hydrocarbon-rich fraction, particularly liquefied natural gas. In said method, the liquefied hydrocarbon-rich fraction is fed to a stripping column, which is used for separating the N-rich fraction, after being liquefied and being supercooled. According to the invention, a first partial flow of the liquefied hydrocarbon-rich fraction (2, 2') is fed to the stripping column (S) as reflux while a second partial flow of the liquefied hydrocarbon-rich fraction (3, 3') is fed to the bottom of the stripping column (S). The second partial flow of the liquefied hydrocarbon-rich fraction (3, 3') has a higher temperature than the first partial flow of the liquefied hydrocarbon-rich fraction (2, 2'). |
