Radon Production

Radon is obtained as a by-product of uraniferous ores processing after transferring into 1% solutions of hydrochloric or hydrobromic acids. H₂, O₂, He, Rn, CO₂, H₂O and hydrocarbons- containing gas mixture extracted from the solutions is purified removing H₂ and O₂ after which on 1000°K - heated copper grids and by KOH and P₂O₅ sorption - from acids and moisture. Radon is condensed by liquid nitrogen and purified from residue gases by sublimation.