Refrigeration – Processes – Circulating external gas
Patent
1993-05-10
1994-11-01
Capossela, Ronald C.
Refrigeration
Processes
Circulating external gas
62 39, F25J 302
Patent
active
053598571
ABSTRACT:
An air liquefaction separation installation is provided with a rectification column which have a carbon monoxide rectification part connected to the upper part of the rectification column and at upper part of its rectification parts or a main condensation evaporator, a collecting part is provided for withdrawing a part of nitrogen gas having reduced amount of carbon monoxide and/or liquified nitrogen; and a carbon monoxide-containing nitrogen gas withdrawal part and/or liquefied nitrogen gas withdrawal part, connected to the lower part of the carbon monoxide rectification part. According to the present invention, carbon monoxide is removed from nitrogen by a rectification process. Accordingly, cost for installation and operation can be reduced.
REFERENCES:
patent: 4872893 (1989-10-01), Agrawal et al.
patent: 5037462 (1991-08-01), Scheigert
patent: 5123947 (1992-06-01), Agrawal
patent: 5129932 (1992-07-01), Agrawal et al.
patent: 5137559 (1992-08-01), Agrawal
Capossela Ronald C.
Nippon Sanso Corporation
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