Air separating method using external cold source
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United States of America Patent
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Jun 22, 1993
Issued Date -
N/A
app pub date -
Oct 13, 1992
filing date -
Sep 18, 1990
priority date (Note) -
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Abstract
The invention concerns the separation of air with an external cold source. An internal cold source is provided to supply cold heat to a compressed inert gas by expansion of a part of a liquefied inert gas when the cold from the external cold source proves to be insufficient. This part of the liquefied inert gas is combined with recycling and compressed gases. The desired production of liquid oxygen and nitrogen is thus assured in spite of variations in the external cold source.
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