发明名称 |
SINGLE STAGE PROCESS FOR PRODUCING HYDROFLUOROCARBONS FROM PERCHLOROETHYLENE |
摘要 |
A process for the preparation of one or more of CHClFCF3 (HCFC-124), CHF2CClF2 (HCFC-124a) and CHF2CF3 (HFC-125) by reaction of perchloroethylene with hydrogen fluoride in a single stage reaction vessel in the presence of a fluorination catalyst. These compounds are useful in a variety of industrial applications including blowing agents, refrigerants, sterilant gases and solvent applications. Distilling the reaction product produces a distillate comprising HCl, CHClFCF3, CHF2CClF2 and CHF2CF3 and a minor amount of HF which distillate is scrubbed to remove the acids. The bottoms product comprises perchloroethylene, hydrogen fluoride and organic by-products which is phase separated to sequester the hydrogen fluoride from the mixture of perchloroethylene and organic by-products. The hydrogen fluoride and mixture of perchloroethylene with organic by-products are then preferably re-mixed at a controlled rate and recycled to the reaction vessel.
|
申请公布号 |
CA2190358(A1) |
申请公布日期 |
1995.11.30 |
申请号 |
CA19952190358 |
申请日期 |
1995.05.25 |
申请人 |
ALLIEDSIGNAL INC. |
发明人 |
TUNG, HSUCH SUNG;SMITH, ADDISON MILES;SWAIN, CHARLES FRANCIS |
分类号 |
C07C17/087;C07B61/00;C07C17/21;C07C17/35;C07C17/38;C07C17/383;C07C19/08;C07C19/12;(IPC1-7):C07C19/08 |
主分类号 |
C07C17/087 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|