Single column distillative separation employing bottom additives

Details Single column distillative separation employing bottom additives Single column distillative separation employing bottom additives

1993-05-14

1994-09-13

Capossela, Ronald C.

Refrigeration

Processes

Circulating external gas

62 29, F25J 300

Patent

active

053457722

ABSTRACT:
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.

REFERENCES:
patent: Re32600 (1988-02-01), Ryan et al.
patent: 4383841 (1983-05-01), Ryan et al.
patent: 4383842 (1983-05-01), O'Brien
patent: 4881960 (1989-11-01), Ranke

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