络合萃取稀醋酸废水的模拟研究

Simulation of the Process of Extract Acetate Acid by Complexing

利用ASPEN PLUS软件,对络合萃取醋酸废水的过程操作模拟计算。模拟计算结果表明:在络合萃取过程中,随着水油相比的增加萃取率下降,当水油相比小于2.0(相比从0.5～2.0)时,萃取率下降幅度不大,平均下降为1.19%;当水油相比大于2.0(相比从2.0～4.0)时,萃取率有较显著的下降,平均下降为6.43%。故在工业萃取中采用水油相比为2进行工业设计。当萃取平衡级数为3时,萃取率为95.98%,满足设计要求(萃取率95%)。常温范围(10～60℃)内,络合萃取剂温度的变化对萃取率的影响不大。

Aspen Plus software and experiment data of extract acetic acid by complexing were used to simulate the whole extraction section.The extraction percentage decreased with the increase of the phase ratio between the aqueous phase and organic phase in the simulation and optimization.When the value of the phase ratio was below 2.0,the average diminution value was 1.19%;as the value of the phase ratio exceeded 2.0,the average diminution value rose to 6.43%.The extractive ratio was 95.98% in three-stage countercurrent extraction.When the temperature changed from 10 ℃ to 60 ℃,the extraction ratio was little change.