Production of intermediate purity oxygen by plural distillation

Details Production of intermediate purity oxygen by plural distillation Production of intermediate purity oxygen by plural distillation

1975-01-20

1977-02-01

Lutter, Frank W.

Refrigeration

Processes

Circulating external gas

62 31, 62 41, F29J 302

Patent

active

040060012

ABSTRACT:
In a process for the production of oxygen of intermediate purity by a two-stage low-temperature rectification of air in two distinct and spaced apart rectifying columns, wherein an oxygen-rich liquid fraction is withdrawn from the sump of a low-pressure column, conveyed by means of a pump to a condenser located at the head of a high-pressure column, and vaporized at that location in indirect heat exchange with condensing nitrogen

REFERENCES:
patent: 2002940 (1935-05-01), Frankl
patent: 2728205 (1955-12-01), Becker et al.
patent: 2833127 (1958-05-01), Vesque et al.
patent: 3210951 (1965-10-01), Gaumer, Jr.
patent: 3298184 (1967-01-01), Smith

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