| abstract |
【Task】 Separation of (Z) -1-chloro-3,3,3-trifluoropropene from 1-chloro-1,3,3,3-tetrafluoropropane, which is difficult to separate by ordinary distillation operation, on an industrial scale Provide a separable method. [Solution] When a mixture containing (Z) -1-chloro-3,3,3-trifluoropropene and 1-chloro-1,3,3,3-tetrafluoropropane is distilled, a formula is used as an extraction solvent. [Wherein, X is hydrogen (H), fluorine (F), or chlorine (Cl), n is an integer of 0 to 3, and m is an integer of 0 to 2. ] Extracted in the presence of at least one compound selected from the group consisting of halogenated hydrocarbons, halogenated unsaturated hydrocarbons, nitriles, ketones, carbonates, ethers, esters, and alcohols represented by It is characterized by performing distillation. According to the present invention, the target product can be obtained with practical and high purity, and it is an industrially excellent method. [Selection figure] None |