【摘要】 以中温煤沥青为原料,研究其在弹管反应器中的炭化以及"反溶剂法"脱出喹啉不溶物(QI)后的精制沥青的炭化效果。结果表明:含有较高QI的非精制沥青不能制备出较好的针状焦,但在500℃,0.2 MPa,10h的炭化条件下,能够得到相对较优热膨胀系数(CTE)的炭化结果;以煤油和洗油为混合溶剂,反溶剂法能够有效地脱除喹啉不溶物,在芳脂比0.4,沉降温度100℃,搅拌时间0.5 h,沉降时间4 h,溶剂比1.8、2的条件下,QI含量分别降到0.0914%和0.0695%,将其在500℃、0.2 MPa、10 h的条件下炭化,可制备出热膨胀系数(CTE)较低的针状焦。更多还原

【Abstract】 The carbonization in a tube bomb of medium-temperature coal tar pitch and the purified coal tar pitch,of which quinoline insoluble(QI) had been removed by anti-solvent method,was comparatively studied.The results show that coal tar pitch with high QI contents could not be suitable for preparation of needle coke of high quality.However,the coke which was obtained through carbonization under0.2 MPa at 500℃ for 10 h had a relatively lower coefficient of thermal expansion(CTE).The QI could be removed effectively by anti-solvent method when kerosene and wash oil were mixed as solvents.By a precipitation process at 100℃ and precipitation time for 4 h with the ratio of wash oil to kerosene was 0.4and stirring for 0.5 h,the QI contents of the refined coal tar pitch could be reduced to 0.0914% and0.0695% for the ratios of solvents to coal tar pitch as 1.8 and 2 respectively.The needle coke which were prepared by such refined coal tar pitch showed lower CTE after being carbonized at 500℃,by 0.2 MPa and for 10 h.更多还原