Process for restarting an auxilliary column for argon/oxygen sep

Details Process for restarting an auxilliary column for argon/oxygen sep Process for restarting an auxilliary column for argon/oxygen sep

1995-03-01

1996-04-09

Kilner, Christopher

Refrigeration

Processes

Circulating external gas

62 22, 62 24, 62 37, F25J 304

Patent

active

055050514

ABSTRACT:
During restarting an argon column (2), two valves (15, 17) provided at the output of a pump (3) are controlled while maintaining a constant level in the base of the argon column, at the outset at a predetermined first control level (N2), then while progressively lowering the controlled value of the constant level. Use in installations for air distillation whose argon column, of the packed type, has a sufficient height to purify the argon of oxygen to an oxygen content less than 100 ppm.

REFERENCES:
patent: 3912476 (1975-10-01), Mikawa et al.
patent: 4784677 (1988-11-01), Al-Chalabi
patent: 4994098 (1991-02-01), Agrawal et al.
patent: 5084081 (1992-01-01), Rohde
patent: 5209070 (1993-05-01), Darredeau
patent: 5311744 (1994-05-01), Sweeney et al.
patent: 5313800 (1994-05-01), Howard et al.
patent: 5406800 (1995-04-01), Bonaquist
patent: 5448893 (1995-09-01), Howard et al.

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