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METHOD OF TWO-STAGE LASER PRODUCTION OF HIGHLY-ENRICHED ISOTOPE C-13
METHOD OF TWO-STAGE LASER PRODUCTION OF HIGHLY-ENRICHED ISOTOPE C-13
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机译:同位素C-13的两阶段激光生产方法
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FIELD: production of isotopes C-13. SUBSTANCE: mixture of CF2HCl with buffer gas (nitrogen) is fed to laser reactor 1 located inside pulse CO2 laser 2. Molecules of CF2HCl are exposed to radiation in laser reactor 1 at first stage for obtaining C2F4. Bromine vapor is added to mixture at outlet of laser reactor 1 and mixture is directed to photo-chemical reactor 3 where it is exposed to radiation of filament lamps. C2F2Br2 thus obtained and excess of bromine are entrapped in adsorber 4 are directed to bromination reactor 5 where CF2Br2, enriched with isotope C-213 is obtained. After passing adsorber 4, gases are directed to cryogenic condenser 7 where nitrogen is separated and are again directed to reactor 1 by means of gas blower 8. Liquid mixture of C-13-dificient freon and HCl from cryogenic condenser are fed to evaporator 9 and are passed through adsorber 10 and dehydrator 11. Then, dehydrated freon is liquefied by means of compressor 12 and is accumulated in receiver 13. Isotope C-13-rich CF2Br2, obtained at first stage is separated in rectifying column 6 and is fed to second stage to laser reactor 1 having added oxygen. Highly-enriched COF2 at content of C-13 exceeding 99% obtained in laser reactor 1 may be used for synthesis of isotopically modified compound of carbon or may be hydrolyzed to CO2. Residual CF2Br2 and Br2 are entrapped in adsorber 4. COF2 may be successively passed through condenser 7 and adsorber 10 for obtaining Na132CO3, from which carbon dioxide may be obtained by action of acid. EFFECT: avoidance of losses of laser radiation; increased productivity at high enrichments. 1 dwg, 1 ex
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