Preparation method of hexafluorobenzene and chloropentafluorobenzene

摘要: The invention discloses a preparation method of hexafluorobenzene and chloropentafluorobenzene. chloropentafluorobenzene comprises the following steps of: (1) adding raw materials including hexafluorobenzene, active potassium fluoride catalyst into reactor; (2) carrying out nitrogen displacement on reactor solvent (3) heating stopping after reaction completes; (4) cooling, switching an air valve reactor, evaporating product in condensing recycling solvent; (5) deacidifying condensed recycled step through acid separator; (6) separating from deacidified rectifying method; (7) are completely recycled, cooling opening kettle, taking residues such as chloride kettle. has characteristics convenience for process operation, mildness reaction, safety controllability, simplicity post treatment procedure, less loss high yield.