Method and apparatus for purification of high N.sub.2 content ga

Details Method and apparatus for purification of high N.sub.2 content ga Method and apparatus for purification of high N.sub.2 content ga

1985-03-13

1986-05-13

Sever, Frank

Refrigeration

Processes

Circulating external gas

55 68, 55 73, 62 20, F25J 302

Patent

active

045884277

ABSTRACT:
Nitrogen and methane are separated in a nitrogen-methane cryogenic fractionator operating at a temperature between the boiling points of nitrogen and methane. A distillative aid or absorbent is injected into the nitrogen-methane cryogenic fractionator for enhancing separation, for enabling an increase in operating pressure, and for enabling a high separation rate at relatively high temperature.

REFERENCES:
patent: 2475957 (1944-08-01), Gilmore
patent: 2595284 (1952-05-01), Mullins
patent: 2600494 (1952-06-01), Ferro, Jr.
patent: 2603310 (1952-07-01), Gilmore
patent: 2716332 (1950-04-01), Haynes
patent: 2744394 (1956-05-01), Newton
patent: 3894856 (1975-07-01), Lofredo
patent: 4293322 (1981-10-01), Ryan et al.
patent: 4352685 (1982-10-01), Swallow

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