Larson & Taylor PLC
Azeotropic mixture of perfluoroalkyl iodide and hydrogen fluoride, and method for isolating and purifying perfluoroalkyl iodides
The present invention provides a method for isolating and purifying 1,1,1,2,2-pentafluoroethyl iodide or hydrogen fluoride from a mixture of 1,1,1,2,2-pentafluoroethyl iodide and hydrogen fluoride, characterized by distilling an azeotropic mixture of 1,1,1,2,2-pentafluoroethyl iodide and hydrogen fluoride from a mixture containing 1,1,1,2,2-pentafluoroethyl iodide and hydrogen fluoride either after liquid&#8212;liquid separation when the mixture is heterogeneous or directly when the mixture is homogeneous to obtain 1,1,1,2,2-pentafluoroethyl iodide or hydrogen fluoride from the bottom of the distillation column.
Daikin Industries
C C C C
C07C C01B C07C C01B
inventional inventional inventional inventional
Tatsuya Yoshinori Tatsuya Hirokazu Eiji
Otsuka Tanaka Hirata Aoyama Seki