RECOVERY OF 1,1,1,3,3,3-HEXAFLUORO-2-PROPANOL

摘要

PURPOSE: To efficiently obtain the subject compound useful as a raw material for medicines and pesticides or as a solvent, by adding an alkaline water to a mixture of a hydrophobic organic solvent and 1,1,1,3,3,3-hexafluoro-2-propanol to conduct aqueous phase extraction followed by acidifying the resultant aqueous phase. ;CONSTITUTION: In recovering 1,1,1,3,3,3-hexafluoro-2-propanol from its mixture with a hydrophobic organic solvent (e.g. toluene), water containing an alkali (e.g. sodium hydroxide) at 0.5 equivalent based on the 1,1,1,3,3,3-hexafluoro-2- propanol is added to the mixture to extract the 1,1,1,3,3,3-hexafluoro-2propanol into the aqueous phase Then, 98% sulfuric acid is added to the resultant aqueous phase isolated so as to acidify the aqueous phase at pH2.0 followed by distillation, thus economically efficiently recovering the 1,1,1,3,3,3-hexafluoro-2-propanol.;COPYRIGHT: (C)1994,JPO&Japio