| 摘要 |
Separation of hydrogen fluoride (HF) from its mixtures with 1,1,1-trifluoro-2-chloroethane (F133a). By settling the mixture of HF and F133a at a temperature below 0 DEG C, there is obtained a lower organic phase which is poor in HF and an upper phase which is rich in HF. The latter can be directly recycled to the fluorination reactor or subjected to a distillation to separate the HF/F133a azeotrope at the head, which is sent back to the settler, and to recover practically pure HF at the base. By distillation of the lower phase, the HF/F133a azeotrope is separated at the head, which is sent back to the settler, and F133a is recovered at the base. |
