The invention belongs to the technical field of
coal chemical industry, and particularly relates to a method and a device for separating various
phenols from middle-low-temperature
coal tar crude
phenols. The method includes a pretreatment step and a mixed
phenol separation step, the pretreatment step includes performing
dehydration, light component removal, heavy component removal and
pyridine compound removal treatment on the middle-low-temperature
coal tar crude
phenols to obtain pretreated mixed phenols, and the mixed
phenol separation step includes separating phenols, orthocresol, 2, 6-dimethylphenol and
cresol in the pretreated mixed phenols. The device comprises a pretreatment
system and a continuous rectification
system, the pretreatment
system comprises a dehydrating
tower, a light component removal
tower, a heavy component removal
tower and a
pyridine extraction device which are sequentially connected, and the continuous rectification system comprises a
phenol refining tower,a orthocresol refining tower, 2, 6-dimethylphenol refining tower, a
cresol tower and a
cresol refining tower which are sequentially connected. According to the method and the device, the middle-low-temperature
coal tar crude phenols are separated to obtain the phenol, the orthocresol, the 2, 6-dimethylphenol and the cresol.