摘要
以鞍钢改质沥青为原料，采用单溶剂萃取法过滤脱除原料沥青中的喹啉不溶物（QI），再用常压蒸馏去除溶剂，得到QI含量小于0．1％的净化沥青。考察了料液比、恒温时间和恒温温度对改质煤沥青QI净化效果的影响。结果表明，净化最佳工艺参数为料液比1：1．5～1：3，恒温时间1h，恒温温度140℃。在最佳工艺条件下得到的净化沥青软化点为62℃，QI含量为0，TI含量为19．1％．结焦值为47．770％。采用红外光谱对净化沥青进行表征，结果表明，原料沥青经过萃取过滤后芳香烃类结构减少，脂肪烃类结构增加。该净化沥青QI较低，结焦残炭率较高，可作为制备浸渍剂沥青、煤基炭纤维等炭素材料的优质原料。
Quinoline insolubles （QI） in raw coal pitch was filtrated and removed by using the single solvent-extraction method in this paper, and then the solvent was removed by atmospheric distillation to obtain refined coal pitch with low QI content （〈0.1%）. The effects of the ratio of pitch to solvent, thermostatic time and thermostatic temperature on the removal rate of QI in refined coal pitch were investigated. The results showed that the optimum purification process parameters were： the range of solid and solvent of 1：1.5-1：3, the constant temperature time of 1 h, and the thermostatic temperature of 140℃. The softening point, QI content, TI content and coking value of refined asphalt under the condition of optimum process were 62℃, 0, 19.1% and 47.77%, respectively. The purification asphalt was characterized by infrared spectrum, which showed that the content of aromatic hydrocarbons decreased and that of fat hydrocarbons increased after extraction filter. This purified tar exhibits low QI and high coking value, which could be used as the quality raw materials for the impregnant pitch and coal based carbon fibers.
出处
《炭素技术》
CAS
北大核心
2014年第5期31-33,共3页
Carbon Techniques
基金
辽宁科技大学专项基金资助项目(2012 TD01)
关键词
煤沥青
单溶剂萃取法
喹啉不溶物
Coal pitch
single solvent-extraction method
quinoline insoluble
