| 摘要 |
PURPOSE:To obtain the subject compound useful as a fluorocarbon substitute, having excellent characteristics as a solvent, etc., by combining 1,1-dichloro-2,2,2- trifluoroethane with methanol. CONSTITUTION:A fluorinated hydrocarbon-based azeotropic mixture comprising 1,1-dichloro-2,2,2-trifluoroethane (R123) and methanol. An azeotropic mixture comprising 90 to 99.9wt.% R123 And 0.1 to 10wt.% methanol, preferably 98.8wt.% R123 and 1.2wt.% methanol is used as the azeotropic mixture. The azeotropic mixture can reduce the amount of fluorocarbon used while satisfying excellent characteristics of fluorocarbon. The azeotropic mixture has a little change of composition even by recycling and is especially useful as a cleaning solvent. |
