| 摘要 |
The present invention relates to a method for producing 1,1,1,2,3,3-hexaafluoropropane, involving reacting gaseous phase hexafluoropropene with hydrogen in a superstoichimetric amount in the presence of a hydrogenation catalyst in a reactor, and recirculating a part of the gaseous effluent from the reactor. |
| 主权项 |
1. A process for the manufacture of 1,1,1,2,3,3-hexafluoropropane, comprising (i) reacting hexafluoropropene in the gas phase with hydrogen in a superstoichiometric amount at a temperature of between 50 and 200° C., in the presence of a hydrogenation catalyst to produce a gaseous output stream, wherein the catalyst comprises supported palladium; (ii) recycling a first portion of the gaseous output stream from the reactor, comprising 1,1,1,2,3,3-hexafluoropropane, unreacted hydrogen and optionally unreacted hexafluoropropene, 1,1,1,2,3-pentafluoropropane and 1,1,1,2-tetrafluoropropane, and (iii) recovering 1,1,1,2,3,3-hexafluoropropane from a second portion of the gaseous output stream from the reactor, optionally after a purification stage, wherein the recycled, first portion of the gaseous output stream represents at least 90% by volume, of the output stream. |
