焦化甲苯的加氢精制

对焦化甲苯原料首先进行加氢处理,之后采用连续精馏的方法进行分离与提纯,以得到纯度较高的甲苯产品。加氢阶段有效去除并转化了焦化甲苯中的噻吩、吡啶和烯烃类杂质。精馏阶段采用2塔连续精馏的实验流程,并对流程进行了模拟,分别对2塔的操作参数进行了优化。通过连续精馏实验对模拟结果进行了验证,结果表明,对加氢处理之后的焦化甲苯原料采用NRTL热力学方法得到的精馏模拟结果可得到纯度为99.39%的甲苯产品,证明实验结果与模拟结果吻合较好。

Hydrogeneration and purification of coking toluene

In order to get high pure toluene product,hydrogenation method is applied to the coking toluene material,which is followed by a continuous distillation method.The impurities in the coking toluene like thiophene,pyridine and olefin can be effectively removed and converted during the period of hydrogenation.For the distillation period,a two-column continuous distillation flowsheet is introduced firstly.The distillation flowsheet is then simulated and the operational parameters are optimized as well.Finally,a test of the modeling results is made by conducting a continuous distillation experiment.As the simulation result shows,a 99.39% pure toluene product can be achieved by means of NRTL thermodynamic method for the hydrogenated coking toluene material.It is proved that the experiment result matches well with the simulation result.