| 摘要 |
A process for producing trifluoromethyl acetylene (TFMA), the process comprising converting trans-1-chloro-3,3,3-trifluoropropene (Z-1233zd) to TFMA in the presence of at least one base, wherein the process is conducted in the presence of water. Preferred bases include alkali metal and alkaline earth metal bases. More preferably, the base is selected from lithium hydroxide, sodium hydroxide and most preferably, potassium hydroxide. Preferably, the process is conducted in the absence of methanol and/or a phase transfer catalyst. The Z-1233zd may be prepared by hydrofluorinating 1,1,1,3,3-pentachloropropane or 1,1,3,3-tetrachloropropene in the presence or absence of a hydrofluorination catalyst, such as Lewis acid metal halides. Alternatively, a process for preparing a tetrafluoropropene, the process comprising contacting the TFMA with hydrogen fluoride (HF) in the presence of a fluorination catalyst to produce a tetrafluoropropene is described. Preferred tetrafluoropropenes include 1234yf and 1234ze. Preferred fluorination catalysts include Lewis acid metal halides such as Sb(V) halides, preferably SbF5. |
