| 摘要 |
For the separation of C5+ hydrocarbons from a gaseous stream containing light hydrocarbons, C1-C5, and, in some cases, lower boiling components, e.g., hydrogen, the gaseous feedstream, under pressure, is cooled, partially condensed, and separated into a liquid fraction and a gaseous fraction. The liquid fraction is separated by rectification under a lower pressure into a product stream consisting essentially of C5+ hydrocarbons and a residual gas stream predominating in components lower boiling than C5. The gaseous fraction separated after the partial condensation is introduced into a recontacting column wherein C5+ components still contained in the gas are scrubbed out. The scrubbing step is performed with a partial condensate of the overhead product of the rectification. The loaded scrubbing liquid is then introduced into the rectification as reflux. |
