Method of producing high-purity helium
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United States of America Patent
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Issued Date -
Dec 4, 2003
app pub date -
May 22, 2003
filing date -
May 28, 2002
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A method of producing high-purity helium, which contains the step of: producing high-purity helium of 99.99 mol % or higher, by a process in which crude helium having a helium concentration of 40 to 90 mol % is, at least, permeated through a separation membrane module composed of a plurality of glass hollow fiber membrane.
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