| 摘要 |
FIELD: chemical and nuclear engineering. SUBSTANCE: proposed method is used for industrial-scale production of carbon dioxide enriched by C-13 isotope. Freon-and-oxygen mixture is supplied to inlet of laser reactor 1. The latter is disposed inside pulse-periodic carbon dioxide laser 2. Buffer gas (nitrogen) is supplied to connecting pipes. Gas mixture has in its composition CF2HCl, N2, O2, HCl, C2F2, COF2. at outlet of laser reactor 1 and is doped with iodine vapors. Mixture obtained is conveyed to photochemical reactor 3 irradiated from outside with incandescent lamps of 300 W each. Mixture incorporating CF2HCl, N2, O2, HCl, COF2, J2, in its composition that escapes from photochemical reactor 3 is passed to adsorber wherein iodine vapors are entrapped. CF2HCl, HCl, COF2. are held in cryogenic condenser 5. Mixture of gases N2 and O2 is supplied again to inlet of laser reactor 1 from cryogenic condenser 5 by means of gas blower 6. Liquid is passed from cryogenic condenser 5 to evaporator 7 and then to absorber 8. Freon depleted by isotope C-13 is condensed upon passing drier 9 with aid of compressor 10 and fed to accumulator 11. Liquid flowing from absorber 8 is essentially carbonate. Carbon dioxide enriched by isotope C-13 is obtained by reaction between this carbonate and acid. Proposed method makes it possible to avoid cryogenic rectification stage for freon. In the process laser reactor 1 can be cooled down to temperatures as low as 50 to 100 C. EFFECT: reduced amount of chemical agents used. 1 cl, 1 dwg |
