【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1 250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。更多还原

【Abstract】 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 fractionation(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.更多还原