| 摘要 |
An azeotropic or near-azeotropic composition comprising CH3CF2CF3 (1,1,1,2,2-pentafluoropropane, HFC-245cb) and CHFCHCF3 (trans-1,3,3,3-tetrafluoropropane, 1234zeE). The compositions may further comprise a lubricant, a stabiliser and/or a flame retardant. The compositions may be used in the manufacture of one or more hydrofluoroolefins, preferably CHFCHCF3 (trans-1,3,3,3-tetrafluoropropane, 1234zeE) or CH2CFCF3 (2,3,3,3-tetrafluoropropene, 1234yf). The composition may be used as a heat transfer composition in various heat transfer devices. The devices may be selected from a mechanical power generation device, a refrigeration device and a air conditioning system. Methods for cooling or heating an article via condensation or evaporation of the composition in the vicinity of an article is also provided. Various methods of use are also disclosed. A process for the separation of the claimed composition is also provided, preferably wherein the process uses pressure swing distillation. A process for preparing CH2CFCF3 (2,3,3,3-tetrafluoropropene, 1234yf) is also provided. |
