Disclosed herein are azeotrope and near-azeotrope compositions comprising
E-1,3,3,3-tetrafluoropropene and hydrogen fluoride. These azeotrope and
near-azeotrope compositions are useful in processes to produce
E-1,3,3,3-tetrafluoropropene and in processes to purify
E-1,3,3,3-tetrafluoropropene from mixtures of
E-1,3,3,3-tetrafluoropropene with 1,1,1,3,3-pentafluoropropane and/or
with hydrogen fluoride.