The invention discloses a rectifying
separation method for chlorinated
benzene production. The rectifying
separation method comprises the following specific steps: feeding
chlorine and excessive
anhydrous benzene into a chlorinator filled with an iron ring catalyst; controlling the
reaction temperature at the
boiling point of
benzene, namely, setting the temperature to 80-90 DEG C; starting a stirrer for constant-speed and constant-temperature stirring to generate
chloride liquid; washing an obtained chlorinated benzene solution by a washing
tower, neutralizing by a neutralizing kettle, extracting in an extraction kettle, and distilling by a two-stage rectifying
tower to obtain a finished product. The rectifying
separation method for the chlorinated benzene production disclosed by the invention is a universal method of the rectifying
separation technology for the chlorinated benzene production at home, and has the following main advantages: high-temperature continuous chlorination is realized; the conversion selectivity of chlorinated benzene is high, the slender chlorination reactor does not tend to cause material mixing return, and a small amount of benzene dichloride is generated; a
distillation process is adopted for separation, the technology is mature and reliable, useful matters are recycled, the synthesis cost is saved, the
economic benefits are increased, and the method conforms to the scientific concept of greenness,
environmental protection and zero
pollution.