The invention relates to a rectifying process and device of stable isotopes produced by
neon gas. The rectifying device comprises a
raw material purifying
system and a cryogenic rectification
cascade system, wherein the
raw material purifying
system comprises a first compressor, a water removing and
drying component and a denitrifying and deoxidizing component which are sequentially connected in the
raw material neon gas inlet direction; the cryogenic rectification
cascade system comprises a condensing component and a cryogenic rectification
cascade component which are sequentially connected; the cryogenic rectification cascade component is formed by cascading n stages of rectification towers, wherein n is an integer that is not less than 1; a cascade condenser is arranged between the two adjacent stages of rectification towers, materials from a
tower kettle of the previous stage of rectification
tower are conveyed into a feeding point of the later stage of rectification
tower, part of the materials at the tower top of the previous stage of rectification tower is conveyed into the cascade condenser and is condensed into a
liquid phase to be returned into the previous stage of rectification tower, and the other part of the materials is condensed and returned. Compared with the prior art, the rectifying process and device provided by the invention overcome the defect of difficult amplification of a thermal
diffusion method, are suitable for large-scale production needs of kilograms, dozens of kilograms and even hundreds of kilograms and can realize long-term and stable operation.