Process for the preparation of trifluoromethylbenzenes from the

Details Process for the preparation of trifluoromethylbenzenes from the Process for the preparation of trifluoromethylbenzenes from the

1981-03-12

1984-07-31

Waltz, Thomas A.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260544D, 570127, 570145, C07C 5104, C07C 1720

Patent

active

044629370

ABSTRACT:
This invention relates to a continuous process for the preparation of trifluoromethylbenzenes from the corresponding trichloro- or tribromo-methylbenzenes with hydrofluoric acid. The process is characterized by passing an ascending stream of gaseous hydrofluoric acid, countercurrently through a plurality of mobile successive liquid layers of the trichloro- or tribromo-methylbenzenes.

REFERENCES:
patent: 1967244 (1934-07-01), Holt et al.
patent: 2181554 (1939-11-01), Kracker et al.
patent: 3859372 (1975-01-01), Robota
patent: 3966832 (1976-06-01), Lademann et al.
patent: 4183873 (1980-01-01), Baxamusa et al.
patent: 4242286 (1980-12-01), Ohsaka

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