【摘要】 用盐效萃取法从电子产品清洗废液中回收异丙醇,考察了碳酸钾水溶液与该清洗废液的质量比对脱水率的影响,测定了异丙醇-水-碳酸钾体系在40℃时的液液相平衡数据,用 Pitzer 理论和 NRTL 方程对液液相平衡数据进行了理论计算。结果表明:当质量分数为60.00%的碳酸钾水溶液与该废液的质量比为2.00时,脱水率高达90.00%;将有机相进行精馏可得到质量分数为99.50%的异丙醇;计算值与实测值接近,水相和有机相的绝对平均偏差分别为0.62%和0.46%。更多还原

【Abstract】 Isopropanol was recovered from waste liquor in electronic products cleaning by salting-out extraction process.The effect of mass ratio of potassium carbonate solution to the waste liquor on the dehydration rate was studied.The liquid-liquid equilibrium data for isopropanol-water-potassium carbonate system were measured at 40℃ and theoretically calculated by means of the Pitzer theory and the NRTL equation.The results show that:When the mass ratio of the potassium carbonate solution with 60.00% of mass fraction to the waste liquor is 2.00,the dehydration rate is as high as 90.00%; Isopropanol with 99.50% of mass fraction can be distillated from the organic phase;The calculated results are close to the experimental data and the absolute mean deviation for the water phase and the organic phase is 0.62% and 0.46%,respectively.更多还原