C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
C07C 19/08 (2006.01) C07C 17/38 (2006.01) C07C 17/383 (2006.01)
Patent
CA 2243499
There is provided an azeotropic mixture consisting substantially of 1, 1, 1, 3, 3-pentafluoropropane and hydrogen fluoride. Further, there is provided a process of separating/purifying R-245fa and/or HF from a mixture comprising R- 245fa and HF wherein the mixture comprising 1, 1, 1, 3, 3-pentafluoropropane and hydrogen fluoride is subjected to a distillation step so that a distillate.is obtained which comprises the azeotropic mixture consisting substantially of 1, 1, 1, 3, 3- pentafluoropropane and hydrogen fluoride, and a bottom product is obtained which comprises separated/purified 1, 7 , 7 , 3, 3-pentafluoropropane or hydrogen fluoride.
Cette invention concerne un azéotrope se composant essentiellement de 1,1,1,3,3-pentafluoropropane et de fluorure d'hydrogène, ainsi qu'un procédé de séparation de R-245fa et/ou de fluorure d'hydrogène d'un mélange les contenant sans passer par l'étape de nettoyage à l'eau. Ce procédé consiste à distiller un mélange contenant du 1,1,1,3,3-pentafluoropropane et du fluorure d'hydrogène de manière à obtenir un distillat comprenant un azéotrope se composant essentiellement de 1,1,1,3,3-pentafluoropropane et de fluorure d'hydrogène, puis à récupérer le distillat comprenant le 1,1,1,3,3-pentafluoropropane purifié ou le fluorure d'hydrogène.
Nakada Tatsuo
Shibanuma Takashi
Shibata Noriaki
Daikin Industries Ltd.
Kirby Eades Gale Baker
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