Industrial naphthalene distillation

During the processing of high-temperature coal tar, if naphthalene-containing fractions (such as tri-mix) are fed directly into the distillation tower to produce industrial naphthalene without being washed to remove acidic substances like phenols, it may cause corrosion to the distillation equipment. Corrosion mainly occurs in the following two areas: 1. The upper part of the distillation tower: Since the light components evaporate first during the distillation process, heavy components such as acidic substances like phenol accumulate at the top of the tower; prolonged accumulation can lead to corrosion of the equipment at the top of the tower and in its vicinity. 2. Condenser and collection system: The substances vaporized from the top of the distillation tower enter the condenser, and after condensation, they flow into the collection system. These areas are also places where corrosive substances such as phenols may accumulate, making corrosion likely to occur. To prevent corrosion, the naphthalene-containing fractions are usually washed and dephenolized before distillation, in order to remove phenols and other acidic substances and reduce the risk of corrosion to the distillation equipment. Without phenol removal treatment, not only are corrosion problems severe, but it also affects the quality of the product. Therefore, the defooling process is an important technological step in the coal chemical industry. .