METHOD FOR TWO-STEP PRODUCTION OF HIGHLY ENRICHED CARBON ISOTOPE C BY LASER METHOD Russian patent published in 2020 - IPC B01D59/34 

FIELD: physics.

SUBSTANCE: invention relates to a method of producing a highly enriched carbon ¹³C isotope by method of infrared multi-photon dissociation of molecules by pulsed CO₂ laser radiation. Method involves irradiation of chlorodifluoromethane CF₂HCl molecules with pulse CO₂ laser with formation of isotope-enriched ¹³C tetra-fluoroethylene C₂F₄ at first dressing stage, conversion of tetrafluoroethylene to difluorodibromomethane CF₂Br₂ and irradiation of difluorodibromomethane molecules with pulsed CO₂ laser radiation at generation frequencies of 1,075–1,088 cm^-1 at second dressing stage, wherein ¹²CF₂Br₂ molecules are dissociated, and enrichment to desired isotope ¹³C is achieved in residual gas ¹³CF₂Br₂.

EFFECT: invention increases efficiency of the separation process, lowers the prime cost of the end product and enables to achieve concentration of isotope ¹³C is more than 99 %.

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