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:
Feb. 04, 1992
Filed:
Jan. 23, 1990
Makoto Yamasaki, Yokohama, JP;
Yoshiharu Horita, Yokohama, JP;
Takashi Otsubo, Kawasaki, JP;
Takumi Kono, Kawasaki, JP;
Tomozumi Murata, Kawasaki, JP;
Yuji Fujioka, Kawasaki, JP;
Koichi Chiba, Kawasaki, JP;
Maki Sato, Kawasaki, JP;
Naoya Hamada, Sagamihara, JP;
Shigeyoshi Arai, Kyoto, JP;
Syohei Isomura, Wako, JP;
Hayato Kaetsu, Wako, JP;
Nippon Steel Chemical Co., Ltd., Tokyo, JP;
Nippon Steel Corporation, Tokyo, JP;
Rikagaku Kenkyusho, Wako, JP;
Abstract
This invention relates to a process for enriching carbon 13 by mixing a halogenomethane containing one or more fluorine atoms and carbon 13 of natural isotopic abundance with one or two or more additive gases selected from a group of oxygen-containing oxidizing agents, halogens, and hydrogen halides, irradiating the resulting raw material gas mixture by a carbon dioxide laser to cause selective dissociation and reaction of the halogenomethane of carbon 13, separating the unchanged substances from the reaction mixture to obtain a product enriched with carbon 13, further converting the enriched product to carbon monoxide, and enriching carbon 13 by low-temperature distillation of the carbon monoxide. The process has advantages of low overall energy consumption, high yields of carbon 13, easy separability of the unchanged substances and high degrees of carbon 13 enrichment.