关键词: 煤焦油, 喹啉不溶物, 分离, 联合处理法

Abstract: Coal tar is a kind of ideal feedstock to produce high value-added carbon materials. However,its high content of quinoline insoluble(QI) limits its utilization seriously. Typical properties of coal tar are introduced first. The composition and origin of QI as well as their damages to the utilization of coal tar are described briefly. Then,methods commonly used to remove QI are reviewed and compared in detail in terms of efficiency and feasibility. The separation efficiency of hot filtering process could meet the industrial requirement,but its cost is too high. The gravity sedimentation process can be simply operated,whereas,it shows a low separation efficiency. For centrifugation and distillation,the separation efficiency is both high,but they are limited by their low handing capacity and low utilization ratio of feedstock,respectively. The operation of solvent extraction process is simple,but it consumes a great deal of solvent. The effect of modification process is obvious; however,its cost is high. The energy consumption of electrostatic separation method is low,however,the optimum condition is difficult to regulate and control. Combined process not only significantly removes QI,but also has excellent application prospect. The combined process is considered to be a scientifically feasible and effective method to remove QI in coal tar,and it can become a promising coal tar purification technology as a future research focus.

Key words: coal tar, quinoline insolubles, separation, combined process