IMPROVED LIQUID-PHASE FLUORINATION PROCESS AND ORGANIC FLUORINATED PRODUCTS RESULTING THEREFROM

摘要

The subject of the present invention is an improved liquid-phase fluorination process in the presence of a catalyst and a plant for the use of this process. The process consists in the reaction, in a reaction region, of hydrofluoric acid and of an organic raw material, in the separation, in a separation region, of the reaction mixture into at least one light fraction, containing the desired fluorinated organic products and at least one first part of the underfluorinated organic products formed, and a heavy fraction comprising, among others, the remainder of the underfluorinated organic products formed. It is characterised in that the said heavy fraction, collected at the foot of the separation region, comprising, among others, the remainder of the underfluorinated organic products formed, additionally contains a part of the entrained catalyst and in that an intermediate withdrawal is carried out at the foot, or near to the foot, of the said separation region at a level corresponding at least to one theoretical plate above the level of the withdrawal at the foot and at least to one theoretical plate below the level for supplying the said separation region with the reaction mixture. IMAGE