分析对比逆流萃取分离的溶剂,研究甲苯对硫辛酸、乙醇和水混合溶液萃取分离的影响;以UNIQUAC方程为计算活度系数的模型,采用相分配系数和物料守恒方程模拟逆流萃取分离,绘制模拟计算程序框图,采用甲苯为萃取剂模拟计算液液萃取分离结果,表明在理论板数N=3时,硫辛酸的收率达92.5%,纯度可达99.1%以上,甲苯是分离的较好萃取剂,为进一步逆流萃取提供依据。 The effects of toluene on the extraction and separation of the mixed solution of lipoic acid, ethanol and water were studied. The UNIQUAC equation was used to calculate the activity coefficient. The phase partition coefficient and the material conservation equation were used to simulate the countercurrent extraction and separation, and the simulation was drawn The block diagram was calculated, and the liquid-liquid extraction and separation results were simulated using toluene as extractant. The results showed that the yield of lipoic acid was 92.5% and the purity was up to 99.1% when the theoretical plate number was N = 3. Agent, to provide a basis for further countercurrent extraction.