Method for removing HCL in chlorination reaction

A method for removing HCl in a chlorination reaction, the method comprising, in a chlorination reaction in which a final product with a chlorine-substituted terminal is produced in a plurality of column reactors connected to each other in series, heating hydrogen chloride produced in the chlorination reaction in a stripping column connected to the reactor positioned at the rearmost end, to remove hydrogen chloride,

• wherein only the rearmost reactor among the plurality of column reactors is connected to the stripping column which is a multi-stage column provided with 10 stages to 20 stages,
• wherein in the chlorination reaction, a liquid-phase reaction product produced in a front end reactor is cooled by a heat exchanger positioned between the reactors to suppress a temperature increase of the reaction product caused by the exothermic chlorination reaction, the cooling being performed within a temperature range in which chlorine gas is not liquefied, and then a predetermined amount of the cooled reaction product is injected into the bottom of a rear end reactor.