Cryogenic rectification process for separating nitrogen and meth

Details Cryogenic rectification process for separating nitrogen and meth Cryogenic rectification process for separating nitrogen and meth

1988-03-21

1989-11-07

Capossela, Ronald C.

Refrigeration

Processes

Circulating external gas

62 29, 62 42, F25J 302

Patent

active

048789321

ABSTRACT:
A cryogenic rectification process for the separation of nitrogen and methane wherein feed is preseparated in a high pressure column or phase separator into vapor and liquid portions, the vapor is condensed and at least partly employed as reflux for a main column, the liquid is passed into the main column at an intermediate point, and a portion of the liquid is vaporized against itself to provide additional column vapor upflow.

REFERENCES:
patent: 2557171 (1951-06-01), Bodle et al.
patent: 3373574 (1968-03-01), Fisher
patent: 3626448 (1971-12-01), Crawford et al.
patent: 4217759 (1980-08-01), Shenoy
patent: 4664687 (1987-05-01), Bauer
patent: 4710212 (1987-12-01), Hanson et al.

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