METHOD FOR SEPARATION OF A MOLECULAR SPECIES BY SUBLIMATION

摘要

The present invention provides a method for separation of a targeted molecular species with high purity from a mixture, by controlling temperatures of sublimation unit calculated by a specific formula.

主权项

1. A method for separation of a targeted molecular species from a mixture of two or more molecular species by a sublimation system comprising
(A) a thermal sublimation unit with a linear tube, comprising (A-1) a sublimation part where the mixture is heated and sublimated and (A-2) a deposition part where sublimated molecular species are deposited, in which the targeted molecular species is deposited in a specific area between position X and position Y in the deposition part and (B) thermal control units which control temperatures of multiple positions of the thermal sublimation unit to decrease as the distance from the sublimate part increases, wherein position X, position Y and temperatures of the thermal sublimation unit are controlled to satisfy the following (i) to (iii): (i) the temperature of the sublimation part is at least higher than the sublimation temperature of the targeted molecular species, (ii) position X is away from deposition areas of molecular species with higher deposition temperatures than the targeted molecular species, and the temperature at the position X is set at the deposition temperature of the targeted molecular species, (iii) the position Y is decided from deposition area of the targeted molecular species, and the temperature at the position Y is higher than deposition temperatures of molecular species with lower deposition temperatures than the targeted molecular species.