Loading patent…
AssigneeDaikin Industries, Ltd.
InventorsSeki Eiji, Otsuka Tatsuya, Hirata Tatsuya, Tanaka Yoshinori, Aoyama Hirokazu
Estimating the term…
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-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.
A method for isolating and purifying 1,1,1,2,2-pentafluoroethyl iodide or hydrogen fluoride from a mixture containing 1,1,1,2,2-pentafluoroethyl iodide and hydrogen fluoride, characterized by conducting liquid-liquid separation of a heterogeneous mixture containing 1,1,1,2,2-pentafluoroethyl iodide and hydrogen fluoride and distilling a layer of pentafluoroethyl iodide or a layer of hydrogen fluoride so that an azeotropic mixture of 1,1,1,2,2-pentafluoroethyl iodide and hydrogen fluoride is removed through the top of a distillation column while 1,1,1,2,2-pentafluoroethyl iodide or hydrogen fluoride is obtained from the bottom of the distillation column.
A method for isolating and purifying 1,1,1,2,2-pentafluoroethyl iodide or hydrogen fluoride from a mixture containing 1,1,1,2,2-pentafluoroethyl iodide and hydrogen fluoride, characterized by distilling a homogeneous mixture containing 1,1,1,2,2-pentafluoroethyl iodide and hydrogen fluoride so that an azeotropic mixture of 1,1,1,2,2-pentafluoroethyl iodide and hydrogen fluoride is removed through the top of a distillation column while 1,1,1,2,2-pentafluoroethyl iodide or hydrogen fluoride is obtained from the bottom of the distillation column.
Dependencies are inferred from the claim text.