间歇萃取精馏操作过程的实验研究

采用复合式精馏塔实现了萃取精馏的间歇操作,塔顶产品物质的量分数达95%以上。以取得合格产品的量与时间之比作为目标函数,研究了回流比R、中间回流量Vm(中间罐向提馏段进料流量)、萃取剂用量S对萃取精馏过程的影响,在R=5～10,Vm=3.2～7.2mL/min,S=1.2～2.2mL/min范围内,随以上操作参数的增大,目标函数均呈先增大后减小的趋势。

Experimental study of batch extractive distillation process

Complex column is applied in batch extractive distillation, the purity of the top product is over 95%. The ratio of yield to operating time is defined as objective function, in order to provide experimental data for simulation and industrialization. The main factors that influence the batch extractive distillation such as reflux ratio R, the middle reflux quantity V_(m) (the reflux quantity from middle vessel to stripping section), and the solvent quantity S are studied. The experimental results show that when R is 5 ～10, V_(m) is 3.2～7 2 mL/min, S is 1.2～2.2 mL/min, with the increase of the above factors, the objective function increases at first but decreases latter.