通过实验室小试确定采用共沸蒸馏法脱除酸性氯化液中HCl的可行性,优选出最佳运行温度为80℃、真空度为60~70 k Pa。工业化分离设备选用填料塔,填料为陶瓷波纹填料,可以将氯化液中的酸质量浓度由0.2~0.5 g/L降至0~0.01 g/L。按照16万t/a氯化苯产能计算,可节约成本140万元/a。 The feasibility of using azeotropic distillation to remove HCl in acidic chlorination solution was determined through laboratory experiments. The optimum operating temperature was 80 ℃ and the degree of vacuum was 60 ~ 70 kPa. Industrial separation equipment used packed tower, packing for the ceramic corrugated packing, the acid concentration of the chloride solution can be reduced from 0.2 ~ 0.5 g / L to 0 ~ 0.01 g / L. Calculated in accordance with 160,000 t / a chlorobenzene production, cost savings of 1.4 million / a.