Process for introducing a multicomponent liquid feed stream at p

Details Process for introducing a multicomponent liquid feed stream at p Process for introducing a multicomponent liquid feed stream at p

1995-11-28

1997-06-03

Capossela, Ronald C.

Refrigeration

Cryogenic treatment of gas or gas mixture

Separation of gas mixture

62924, F25J 300

Patent

active

056343566

ABSTRACT:
A process is set forth for introducing a multicomponent liquid feed stream at pressure P.sub.2 into a distillation column operating at lower pressure P.sub.1. The process comprises removing a split stream from the feed stream, reducing its pressure and using the resulting stream to subcool the feed stream. After being subcooled, the feed stream is also reduced in pressure and both streams are fed to different stages of the distillation column. An important embodiment of the present invention is within the standard double column air separation cycle where the multicomponent liquid stream is the crude liquid oxygen stream from the bottom of the high pressure column which must be reduced in pressure prior to its introduction into the low pressure column.

REFERENCES:
patent: 5157926 (1992-10-01), Guilleminot
patent: 5475980 (1995-12-01), Grenier et al.
R. E. Latimer, "Distillation of Air" in Chemical Engineering Progress, 63(2), 35-39, (1967).

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