| 摘要 |
The present invention relates to a process for the reduction dechlorination of ClCF2CFClCF2Cl to HCF2CHFCF2H comprising the step of contacting 1,2,3-trichloropentafluoroethane and H2 over a catalyst selected from the group consisting of palladium, platinum, ruthinium, rhodium, iridium and mixtures thereof under reaction conditions sufficent to produce a product stream containing 1,1,2,3,3-pentafluoropropane. The present invention further relates to a three step process wherein the ClCF2CFClCF2Cl to be reduced is synthesized by: (a) reacting HF with a compound of formula I: XCH=CYCH2X, where X is H, Cl, or F, Y is H or Cl; to give a compound of formula II: CH2XCFYCH2X, where X and Y are the same as in the compound of formula I: (b) chlorinating the compound of formula II to give a compound of formula III: CCl3-mFmCFClCCl3-mFm where m is zero or 1, and (c) fluorinating the compound of formula III to give CClF2CFClCF2Cl. A composition of matter having the formula HCF2CHFCF2Cl is also disclosed.
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