High pressure oxygen pumped LOX rectifier

Details High pressure oxygen pumped LOX rectifier High pressure oxygen pumped LOX rectifier

1984-02-27

1986-08-05

Sever, Frank

Refrigeration

Processes

Circulating external gas

62 22, 62 28, 62 30, 62 31, 62 33, 62 34, 62 42, F25J 304

Patent

active

046041168

ABSTRACT:
A process and apparatus are disclosed for producing pressurized oxygen at up to about 10 ATA directly in a cryogenic distillation process without need of an oxygen compressor. The process involves a split supply pressure air supply wherein the elevated pressure fraction gasifies pumped liquid oxygen. An essential aspect of the invention is that this gasification takes place in an elevated pressure rectifier; thus the elevated pressure fraction of air is converted into partially separated liquids as opposed to the more wasteful conversion to liquid air which occurs in the conventional process. The improvement may be adapted to any cryogenic distillation configuration and be used to produce any purity of product oxygen. A particularly high purity (99.5%) and low energy example is presented.

REFERENCES:
patent: 2280383 (1942-04-01), DeBaufre
patent: 4433989 (1984-02-01), Erickson

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