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Azeotropic mixture of perfluoroalkyl iodide and hydrogen fluoride, and method for isolating and purifying perfluoroalkyl iodides
Azeotropic mixture of perfluoroalkyl iodide and hydrogen fluoride, and method for isolating and purifying perfluoroalkyl iodides
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机译:全氟烷基碘和氟化氢的共沸混合物,以及分离和纯化全氟烷基碘的方法
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摘要
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.
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