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.:
Date of Patent:
Apr. 12, 2011
Filed:
Sep. 20, 2007
Takashi Kambe, Tsutiura, JP;
Hitoshi Kihara, Chiba, JP;
Norihisa Nara, Tsutiura, JP;
Hiroshi Kawakami, Tsutiura, JP;
Takashi Kambe, Tsutiura, JP;
Hitoshi Kihara, Chiba, JP;
Norihisa Nara, Tsutiura, JP;
Hiroshi Kawakami, Tsutiura, JP;
Taiyo Nippon Sanso Corporation, Tokyo, JP;
Abstract
A method of enriching a heavy oxygen isotope by distillation of the present invention includes: a first distillation step of feeding oxygen and ozone generated by an ozonizerinto a distillation columnfilled with a diluent gas, and separating the oxygen, and the ozone and the diluent gas; a photodecomposition step of introducing a mixed gas of the ozone and the diluent gas from a bottom of the distillation column into a photoreaction cell, and irradiating the mixed gas with a laser light to selectively decompose the ozone containing the heavy oxygen isotope; and a second distillation step of returning non-decomposed ozone and oxygen containing the heavy oxygen isotope to the distillation column, and separating the oxygen, and the ozone and the diluent gas.