Cryogenic rectification system for producing higher purity helium
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United States of America Patent
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Jun 30, 1998
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N/A
app pub date -
Aug 1, 1997
filing date -
Aug 1, 1997
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Abstract
The production of higher purity helium wherein a feed comprising helium, nitrogen and hydrocarbons is processed in a system comprising two columns operating at different pressure levels, with the product helium produced in the higher pressure column and nitrogen and hydrocarbons cycled to the lower pressure column.
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