Organic compounds -- part of the class 532-570 series – Organic compounds – Halogen containing
Patent
1994-07-25
1996-08-13
Siegel, Alan
Organic compounds -- part of the class 532-570 series
Organic compounds
Halogen containing
570165, 570166, 570168, 570169, C07C 1708, C07C 1908
Patent
active
055457738
ABSTRACT:
In an improved process and plant for carrying out liquid phase fluorination in the presence of a catalyst, consisting in reacting hydrofluoric acid and an organic starting material in a reaction zone, and in separating, in a separating zone, reactional mixture and at least one light fraction containing the desired fluorinated organic products and at least a first part of the sub-fluorinated organic products formed, and a heavy fraction that includes the remainder of the sub-fluorinated organic products formed, and further comprising partial condensation of the said light fraction in order to obtain a gaseous phase containing the desired fluorinated organic products and a liquid phase containing said first part of the said sub-fluorinated organic products, said heavy fraction being returned to said reaction zone and said liquid phase being returned as a reflux to the top of the separation zone, intermediate recovery is carried out at, or in the proximity of, the lower portion of said separation zone.
REFERENCES:
patent: 2005709 (1935-06-01), Daudt et al.
patent: 5008474 (1991-04-01), Wairevens
Elf Atochem S.A.
Siegel Alan
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