Chemistry: electrical and wave energy – Processes and products – Processes of treating materials by wave energy
Patent
1989-01-17
1990-07-17
Miller, Edward A.
Chemistry: electrical and wave energy
Processes and products
Processes of treating materials by wave energy
20415722, B01D 5934
Patent
active
049419560
ABSTRACT:
An enrichment method of carbon 13 by use of the multistage laser irradiation. A mixture of CHClF.sub.2 and Br.sub.2 is used as a start substance. The mixture is irradiated with laser rays emitted from a carbon dioxide gas laser to obtain CBr.sub.2 F.sub.2 enriched with carbon 13. This CBr.sub.2 F.sub.2 enriched with carbon 13 is once more irradiated with laser rays emitted from a carbon dioxide gas laser to produce C.sub.2 Br.sub.2 F.sub.4 which is further enriched with carbon 13. Alternatively, the product CBr.sub.2 F.sub.2 of the first laser irradiation is once more irradiated together with O.sub.2 to produce COF.sub.2 which is further enriched with carbon 13.
REFERENCES:
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patent: 4313807 (1982-02-01), de Mevergnies et al.
patent: 4406763 (1983-04-01), Hsu et al.
patent: 4436709 (1984-03-01), Gauthier et al.
Chemical Abstracts, vol. 101, 1984, p. 436.
Effects of NH.sub.3 on .sup.13 C-Selective Infrared Multiple Photon Decomposition of CF.sub.2 HCl by a CO.sub.2 Laser, Bull. Chem. Soc. Jpn., 60 4217 4222 (1987).
Arai Shigeyoshi
Isomura Shohei
Kaetsu Hayato
Sugita Kyoko
Mai Ngoclan T.
Miller Edward A.
Rikagaku Kenkyusho
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