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

1995-11-07

1996-12-10

Caposella, Ronald C.

Refrigeration

Cryogenic treatment of gas or gas mixture

Separation of gas mixture

F25J 300

Patent

active

055820344

ABSTRACT:
A method of producing nitrogen is a single column nitrogen generator in which first and second coolant streams are used to condense nitrogen-rich tower overhead to provide reflux for the distillation column. One of the coolant streams is composed of liquid having a higher nitrogen content than oxygen-rich liquid produced in a bottom region of the distillation column. This coolant stream is compressed, cooled and recycled to the bottom of the distillation column in order to increase nitrogen recovery.

REFERENCES:
patent: 4617037 (1986-10-01), Okada et al.
patent: 5349822 (1994-09-01), Nagamura et al.
patent: 5396772 (1995-03-01), Mokeigue et al.

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