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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 9895662 B1

PDFFull Text
Date of Patent:
Feb. 20, 2018

Filed:

Oct. 01, 2013

Method for enriching oxygen isotope

Applicant:

Taiyo Nippon Sanso Corporation, Tokyo, JP;

Inventors:

Takashi Kambe, Tsuchiura, JP;

Shigeru Hayashida, Kofu, JP;

Takehiro Igarashi, Tokyo, JP;

Assignee:

TAIYO NIPPON SANSO CORPORATION, Tokyo, JP;

Attorney:

Nixon & Vanderhye P.C.

Primary Examiner:

Neil N Turk

Int. Cl.
CPC ...
F25J 3/08 (2006.01); B01D 59/04 (2006.01); C01B 5/02 (2006.01); F25J 3/02 (2006.01); B01D 3/14 (2006.01); C01B 5/00 (2006.01); C01B 21/24 (2006.01); C01B 13/02 (2006.01); H01M 8/04119 (2016.01); B01D 59/50 (2006.01); C01B 3/00 (2006.01); H01M 8/0662 (2016.01); B01D 59/32 (2006.01);
U.S. Cl.
CPC ...
B01D 59/04 (2013.01); B01D 3/14 (2013.01); B01D 3/143 (2013.01); B01D 59/50 (2013.01); C01B 5/00 (2013.01); C01B 5/02 (2013.01); C01B 13/02 (2013.01); C01B 21/24 (2013.01); F25J 3/02 (2013.01); F25J 3/08 (2013.01); H01M 8/04156 (2013.01); B01D 59/32 (2013.01); H01M 8/0662 (2013.01);
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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