Catalytic process for the preparation of hexafluoroacetone

Details Catalytic process for the preparation of hexafluoroacetone Catalytic process for the preparation of hexafluoroacetone

1984-12-07

1986-04-01

Reamer, James H.

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

Organic compounds

Oxygen containing

568393, C07C 4563

Patent

active

045799741

ABSTRACT:
Disclosed is a continuous catalytic process for the preparation of hexafluoroacetone comprising reacting in a first fluorination step a mixture of hydrofluoric acid and a chlorofluoroacetones recyclate, then in a second fluorination step, a mixture containing the effluent issuing from the first step and fresh hexachlorofluoroacetone, on a catalyst comprising gamma alumina impregnated with chromium sesquioxide Cr.sub.2 O.sub.3 in an amount of 1.5 to 4 atoms of chromium per liter of alumina and activated between 300.degree. C. and 400.degree. C. by means of a mixture of hydrofluoric acid and 1,1,2-trichloro-1,2,2-trifluoro-ethane.

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patent: 3803241 (1974-04-01), Stolkin et al.
patent: 3804778 (1974-04-01), Salindres
patent: 3978145 (1976-08-01), Knaak
Wang, Chem. Abst., vol. 97, #916695 (1982).

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