FIELD: chemistry.
SUBSTANCE: to obtain a high-purity product, atmospheric stripping of light impurities is carried out first, after which the desired product is extracted via azeotropic rectification with water in the presence of a stabiliser - sodium or potassium carbonates, hydrocarbonates, sulphites or mixtures thereof in amount of 1-20% or more preferably 3-5% of the weight of the added water.
EFFECT: high degree of purity of 1,2,3,4,4-hexafluoro-1,2,3,4-tetrachlorobutane, prevention of corrosion and contamination of equipment.
1 cl, 3 tbl, 2 ex
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