Method for enriching oxygen isotope
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United States of America Patent
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Feb 20, 2018
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app pub date -
Oct 1, 2013
filing date -
Oct 18, 2012
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Abstract
The present invention provides a method for enriching an oxygen isotope which enables the oxygen isotope to be enriched without requiring regular replenishment of large amounts of the nitric oxide raw material and with a small liquid NO hold-up volume, without reducing the separation efficiency for the oxygen isotope. By performing a chemical exchange between a water acquired by adding hydrogen to an oxygen having a crudely enriched oxygen isotope produced by a first distillation device, and a nitric oxide discharged from a second distillation device, a nitric oxide having an enriched concentration of the oxygen isotope and a water having a reduced concentration of the oxygen isotope are obtained, and the nitric oxide is supplied to the second distillation device, while an oxygen obtained by electrolysis of the water having a reduced concentration of the oxygen isotope is returned to the first distillation device.
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