[EN] HYDROGEN FLUORIDE-HFC-254EB AZEOTROPE AND ITS USES<br/>[FR] AZÉOTROPE FLUORURE D'HYDROGÈNE-HFC-254EB ET SES UTILISATIONS
申请人:DU PONT
公开号:WO2011053449A1
公开(公告)日:2011-05-05
Described is a process for separating 1,1,1,2-tetrafluoropropane and hydrogen fluoride from a mixture comprising 1,1,1,2-tetrafluoropropane, 1,1,1,2,3-pentafluoropropane and hydrogen fluoride comprising: subjecting said 1,1,1,2-tetrafluoropropane, 1,1,1,2,3-pentafluoropropane and hydrogen fluoride mixture to a distillation step, forming a column distillate composition comprising an azeotropic or near-azeotropic composition of said 1,1,1,2-tetrafluoropropane and hydrogen fluoride, and a bottoms composition of 1,1,1,2,3-pentafluoropropane. The column distillate may optionally be made essentially free of 1,1,1,2,3-pentafluoropropane and the column bottoms composition may optionally be made essentially free of HF. Also described is a process for separating 1,1,1,2-tetrafluoropropane and hydrogen fluoride from a mixture of 1,1,1,2-tetrafluoropropane and hydrogen fluoride. Also described are azeotropic and azeotrope-like compositions comprising 1,1,1,2-tetrafluoropropane and hydrogen fluoride.
描述了一种从包括1,1,1,2-四氟丙烷、1,1,1,2,3-五氟丙烷和氢氟酸的混合物中分离1,1,1,2-四氟丙烷和氢氟酸的过程,包括:将所述1,1,1,2-四氟丙烷、1,1,1,2,3-五氟丙烷和氢氟酸混合物经过蒸馏步骤,形成包括所述1,1,1,2-四氟丙烷和氢氟酸的共沸或接近共沸组成的柱馏物组成,以及1,1,1,2,3-五氟丙烷的底部组成。柱馏物可以选择性地基本上不含1,1,1,2,3-五氟丙烷,柱底组成可以选择性地基本上不含HF。还描述了一种从1,1,1,2-四氟丙烷和氢氟酸的混合物中分离1,1,1,2-四氟丙烷和氢氟酸的过程。还描述了包括1,1,1,2-四氟丙烷和氢氟酸的共沸和类共沸组成。