| 摘要 |
Preparation of phosphorus pentafluoride is carried out in the liquid phase by fluorination of phosphorus trichloride with hydrofluoric acid in the presence of chlorine. Preferably, the HF/PCl3 molar ratio is ≥ 5, especially 6-30, and the Cl2/PCl3 molar ratio is ≥ 1, more preferably 1-1.4, especially 1-1.2. Preferably the process may be carried out in a discontinuous manner by introducing PCl3, HF and Cl2 in this order into a low temperature reactor, stirring the reaction mixture until the pressure is constant, gradually reducing the reactor pressure and then separating the reaction products. |
