Purification of organic fluorine alcohols from azeotropic mixtures with non-fluorinated alcohols using extractive distillation

The extractive distillation process of 2,2,2-trifluoroethanol – isopropanol azeotropic mixture using N-methyl-2-pyrrolidone as a separating agent has been experimentally studied. The experiments were carried out on a batch column with regular packing. The results are shown that using this separating agent makes it possible to eliminate thermodynamic constraints imposed by binary azeotrope and to recover 2,2,2-trifluoroethanol with a purity of more than 0,99.