Preparation of 1,1,2,3,3-pentafluoropropane

Details Preparation of 1,1,2,3,3-pentafluoropropane Preparation of 1,1,2,3,3-pentafluoropropane

1993-09-30

1999-03-09

Siegel, Alan

Organic compounds -- part of the class 532-570 series

Organic compounds

Halogen containing

570167, 570169, 20415795, C07C 1908, C07C 1708

Patent

active

058803173

ABSTRACT:
The present invention relates to a process for the reduction dechlorination of ClCF.sub.2 CFClCF.sub.2 Cl to HCF.sub.2 CHFCF.sub.2 H comprising the step of contacting 1,2,3-trichloropentafluoroethane and H.sub.2 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 ClCF.sub.2 CFClCF.sub.2 Cl to be reduced is synthesized by:

REFERENCES:
patent: 2917559 (1959-09-01), Sweeney et al.
patent: 5315048 (1994-05-01), Van Der Puy et al.
J. Burdon et al., "Partial Fluorination of Tetrahydrofuran with Cobalt Trifluoride", J. Chem. Soc. (C), (1969), pp. 1739-1746.
Henne et al., "The Addition of Hydrogen Fluoride to Halo-Olefins", J. Am. Chem. Soc., (1943), 65, p. 1271-1272.
Henne et al., "Perfluorinated Olefins", J. Am. Chem. Soc., (1948), 70, pp. 130-132.
O. Paleta, "Ionic Addition Reactions of Halomethanes With Fluoroolefins", Fluorine Chemistry Reviews, Ed. P. Tarrant et al, (1977), Chap. 2, pp. 39-71.
Miller, et al., "Preferential Replacement Reactions of Highly Fluorinated Alkyl Halides. Preparation . . .", J. Am. Chem. Soc., (1957), 79, pp. 4164-69.

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