| 摘要 |
A method for the distillative separation of hydrocarbon feed stream such as a carbon dioxide-containing feed stream in a single distillation column into a vapor carbon dioxide product stream and a side column product stream such as a liquid propane stream employing a recycled C4+ bottom additive stream. The method comprises: Introducing a feed stream into a single cryogenic distillation column; withdrawing a C4+ bottom additive stream from the bottom of the column; recycling the C4+ stream into the single column above the feed point of the feed stream, and withdrawing from a side point in the column above the introduction of the feed stream a vapor product stream enriched in C3+, and cooling the vapor stream to produce a C3 liquid product stream. |
