Ultra-high purity oxygen production

Details Ultra-high purity oxygen production Ultra-high purity oxygen production

1995-08-11

1996-12-10

Kilner, Christopher

Refrigeration

Cryogenic treatment of gas or gas mixture

Separation of gas mixture

62647, 62648, 62900, F25J 304, F25J 500

Patent

active

055820328

ABSTRACT:
A process for producing an ultra-high purity fluid product comprising the steps of collecting in the lower portion of a cryogenic fractionation zone an ultra-high purity fluid product; providing reboil to said fractionation zone by condensing a portion of a lesser purity composition of the same fluid product by indirect heat exchange in a first reboiler; and vaporizing said portion of said lesser purity composition by indirect heat exchange with a warmer stream of an impure fluid.

REFERENCES:
patent: 2209748 (1940-07-01), Schlitt
patent: 2729954 (1956-01-01), Etienne
patent: 3127260 (1964-03-01), Smith
patent: 4579566 (1986-04-01), Brugerolle
patent: 4615716 (1986-10-01), Cormier et al.
patent: 5341646 (1994-08-01), Agrawal et al.
patent: 5363656 (1994-11-01), Nagamura et al.

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