Process and installation for producing nitrogen and oxygen

Details Process and installation for producing nitrogen and oxygen Process and installation for producing nitrogen and oxygen

1993-10-12

1995-04-11

Capossela, Ronald C.

Refrigeration

Processes

Circulating external gas

62 38, 62 40, F25J 302

Patent

active

054047250

ABSTRACT:
A column (4) for producing nitrogen comprises, below the air introduction point, a section (17, 18) enriched in oxygen and a sump reboiler (9) supplied by recycled high pressure nitrogen. The expanded liquid (at 19) for supplying the overhead condenser (8) is withdrawn at an intermediate level between the level of air introduction and the reboiler, and the liquid in the sump of the column, after vaporization, constitutes a minority product of the installation consisting essentially of oxygen.

REFERENCES:
patent: 4303428 (1981-12-01), Vandenbussche
patent: 4883518 (1989-11-01), Skolaude et al.

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