Refrigeration – Processes – Circulating external gas
Patent
1983-09-12
1986-01-28
Sever, Frank
Refrigeration
Processes
Circulating external gas
26 34, 26 37, 26 38, 26 39, F25J 304
Patent
active
045668876
ABSTRACT:
A process and apparatus for the production of nitrogen from air by the cryogenic fractionation of the air at superatmospheric pressure and which permits the production of variable quantities of nitrogen from a constant supply of air at superatmospheric pressure by periodically distilling less than all of the air which is supplied at superatmospheric pressure and work expanding a stream of air at superatmospheric pressure provided from the balance of said supply whereby to produce additional refrigeration for the process, and recovering condensed nitrogen vapor thereby formed in excess of that required for reflux.
REFERENCES:
patent: 4372764 (1983-02-01), Theobald
Costain Petrocarbon Limited
Sever Frank
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