Process for the preparation of 1,1,1,3,3-pentafluoropropane

Details Process for the preparation of 1,1,1,3,3-pentafluoropropane Process for the preparation of 1,1,1,3,3-pentafluoropropane

1996-07-15

1998-03-17

Siegel, Alan

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

Organic compounds

Halogen containing

570166, 570168, C07C 1908, C07C 1708

Patent

active

057289042

ABSTRACT:
This invention is related to the preparation of hydrofluorocarbons (HFCs). Specifically, it relates to the manufacture of 1,1,1,3,3-pentafluoropropane, CF.sub.3 CH.sub.2 CF.sub.2 H (HFC-245fa) by the steps comprising (1) the formation of CCl.sub.3 CH.sub.2 CCl.sub.3 by the reaction of CCl.sub.4 with vinylidene chloride; (2) the conversion of CCl.sub.3 CH.sub.2 CCl.sub.3 to CF.sub.3 CH.sub.2 CF.sub.2 Cl by reaction with HF in the presence of a fluorination catalyst, selected from TiCl.sub.4, SnCl.sub.4 or mixtures thereof; and (3) reduction of CF.sub.3 CH.sub.2 CF.sub.2 Cl to CF.sub.3l CH.sub.2 CF.sub.2 H.

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Chem. Abstr., (1991), 114: 125031q, p. 125026.
Chem. Abstr., (1961), 55, p. 349f.
Burdon et al., "Partial Fluorination of Tetrahydrofuran with Cobalt Trifluoride", J. Chem. Soc., C, (1969), p. 1739.
Asscher, et al., "Chlorine Activation by Redox-transfer . . . ", J. Chem. Soc., (1961), p. 2261.

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