| titleOfInvention |
Method of obtaining 2-chloro-1,1,1,2,3,3,3- hepta-fluoro-propane, hexa-fluoro-propene and 1,1,1,2,3,3,3- hepta-fluoro-propane |
| abstract |
FIELD: chemistry. n SUBSTANCE: invention pertains to the method of obtaining 2-chloro-1,1,1,2,3,3,3-hepta-fluoro-propane, which consists of (a) contacting mixture, containing hydrogen fluoride, chlorine and at least, one initial product, chosen from a group, consisting of halogen propenes with formula CX 3 CCl=CX 2 and halogen propanes with formula CX 3 CClYCX 3 , where each X independently represents F or Cl, and Y represents H, Cl and F (under the condition that, the number of X and Y, which are F, is not more than six) with a chlorofluorination catalyst in the reaction zone with obtaining of a product in the form of a mixture, containing CF 3 CClFCF 3 , HCl, HF and an uncompletely fluorinated halogenated hydrocarbon intermediate compounds and (b) separation of the obtained product with release of CF 3 CClFCF 3 . The stated chlorofluorination catalyst, containing at least, one chrome containing component, is chosen from (i) crystal alpha-chrome oxide, where at least, 0.05 atom % of the chromium atoms in the crystal lattice of the alpha-chrome oxide are substituted with nickel, trivalent cobalt or with nickel, or with trivalent cobalt under the condition that, not more than 2 atom % of chromium atoms in the crystal lattice of the alpha-chrome oxide are substituted with nickel, and that the overall number of chromium atoms in the crystal lattice of the alpha-chrome, which are substituted with nickel and trivalent cobalt, is not more than 6 atom %, and (ii) fluorinated crystal oxide (i). The invention also pertains to the method of obtaining a mixture of hexa-fluoro-propene and 1,1,1,2,3,3,3-hepta-fluoro-propane through interaction of the initial mixture, consisting of CF 3 CClFCF 3 , which is obtained using the method given above, and hydrogen, in vapour phase at high temperature, possibly, in the presence of a hydrogenation catalyst. n EFFECT: improved action of the catalyst. n 3 cl, 17 ex, 2 tbl |