AZEOTROPES OF CHLOROFLUOROETHANES WITH HYDROGEN FLUORIDE

摘要

A process is disclosed for recovering HF from a product mixture comprising HF and at least one compound having the formula CF3CCl2+xF1-x (where x is 0 or 1). The process includes the steps of distilling the product mixture to remove all products which have a lower boiling point than the lowest boiling azeotrope containing HF and said at least one compound; and distilling said azeotrope to recover HF as an azeotropic composition containing HF and said at least one compound. Also disclosed are azeotrope and azeotrope-like compositions which consist essentially of hydrogen fluoride in combination with from about 10 to 27 mole percent CCl3CF3 or from about 35 to 56 mole percent CCl2FCF3.