An extracting and separating method of high-temperature
coal tar belongs to a
coal tar separation method. The extracting and separating method includes the step of adding No.1 or No.2
solvent into the
coal tar at the ordinary pressure for secondary extraction and separation. Extraction processes are carried out under the pretreatment condition of sufficiently mixing and heating,
heating temperature is lower than 150 DEG C, raw materials of the
coal tar are respectively mixed with the No.1 or No.2
solvent according to the volume proportion of 1:2 to 4, extraction time ranges from 1 to four hours, extracts and
raffinate are obtained after the No.1
solvent and the
coal tar are filtered and separated when the
system is balanced, and the No.1 solvent is recovered by
distillation and recycled. The extracting and separating method has the advantages that energy saving effect of equipment is evident, process is simple and convenient, operation conditions are moderate, manufacturing cost and investment of the equipment are low and benefits are evident. Adding quantity of the solvent and extraction operation parameters are changed, separation depth and process capacity of the
coal tar can be flexibly mastered and selectively controlled.