中文摘要：

以高温煤焦油为原料，在自制小型压滤装置上脱除喹啉不溶物（QI），并对滤后煤焦油进行超临界流体萃取分馏制备超净沥青。结果表明，当滤布孔径1250目、温度125℃、压力0．5MPa时，煤焦油中的QI质量分数可降低到0．037％。对压滤后的焦油进行超临界萃取，所制沥青的QI和甲苯不溶物质量分数分别达到0．10％和20．31％，可满足制备高性能炭素材料前驱体的要求。

英文摘要：

Quinoline insolubles （QI） of high temperature coal tar sampled from a coking plant of Shanxi province was removed by a self-made pressure filtration device. Ultra-clean pitch was prepared from the filtered coal tar by utilizing supercritical fluid extraction and fraetionation （SFEF）. Results indicated that the QI content of the filtered coal tar decreased to 0.037% at the conditions of 1 250 mesh filter cloth, 125℃ and 0.5MPa. And the QI and toluene insoluble （TI） level of ultra-clean pitch from SFEF reached 0.1% and 20.31%, which indicated that the pitch could be used as a premium precursor for high-performance carbon material, especially the needle-coke.