Air separation method and apparatus for producing nitrogen

Details Air separation method and apparatus for producing nitrogen Air separation method and apparatus for producing nitrogen

1997-10-31

1999-02-09

Capossela, Ronald

Refrigeration

Cryogenic treatment of gas or gas mixture

Separation of gas mixture

62901, F25J 300

Patent

active

058680063

ABSTRACT:
A method and apparatus for producing nitrogen within a nitrogen generator in which coolant streams composed of column bottoms and liquid having a nitrogen content greater than column bottoms are withdrawn from the column and then used to condense tower overhead for reflux purposes. The liquid composed of the oxygen-rich liquid after vaporization is expanded in a turboexpander with a performance of work. The other coolant stream is recompressed, cooled and then used to produce boil-up in the bottom of the column in order to produce the liquid vapor ratio in the bottom of the column.

REFERENCES:
patent: 4617037 (1986-10-01), Okada et al.
patent: 5325674 (1994-07-01), Gastinne et al.
patent: 5582034 (1996-12-01), Naumovitz

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