水-异丁醇二元体系溶解度和液液相平衡  

Solubility and Liquid-Liquid Equilibrium on the Binary System of Water-Isobutanol

作　　者：金春英[1] 林金清[2] 

机构地区：[1]华侨大学化工学院,福建厦门361021 [2]华侨大学材料科学与工程学院,福建厦门361021

出　　处：《华侨大学学报（自然科学版）》2014年第1期57-60,共4页Journal of Huaqiao University(Natural Science)

基　　金：国家自然科学基金资助项目(20776057;21246008);福建省自然科学基金资助项目(2011J01048);华侨大学科研基金资助项目(07X0144)

摘　　要：在常压，温度为25-60℃条件下，采用浊点法测定水一异丁醇二元体系的溶解度和液液相平衡数据，并用非随机（局部）双液体（NRTL）模型进行关联计算，考察温度对模型参数的影响．结果表明：当该二元体系的模型参数均与温度成线性关系时，关联精度最高，最大相对误差为0．22％，平均相对误差为0．09％；而当模型参数均与温度无关时，最大相对误差为0．69％，平均相对误差为0．51％，也能满足关联精度要求．用文献报道的，从二元汽液相平衡数据关联得到的模型参数，所预测的二元液液相平衡关系仍存在较大的偏差，最大相对误差为6．14％，平均相对误差为4．87％．说明该二元组分在沸点附近汽液两相问的作用力与其在30～60℃时液液两相间的作用力有较为明显的差别．In the paper, the data of solubility and liquid-liquid equilibrium （LLE） on the binary system of water-isobuta- nol were determined with cloud point method. The operation pressures were the atmosphere, working temperature was between 25 degrees centigrade to 60 degrees centigrade. The relationship were calculated with non-random （regional） two liquid （NRTL） model. The effect of temperature on the models parameters were analyzed. The results showed when linear relationship was existed between the temperature and the binary system model parameters, there were the highest correlation accuracy, the maximum relative error was 0. 22%0, the average was 0. 09%. However, when the parameters were independent of temperature, its precision is well enough to meet the requirement. Two errors were 0. 69% and 0. 51% respectively. Contrarily, when the binary vapor-liquid equilibrium deduced parameters were quoted from the reference, the calculation by NRTL model wasn＇t ideal. Under such conditions, the maximum relative error was 6. 14%, the average was 4.87 %. Indicating the interaction force of the binary-component in vapor-liquid at boiling point is significantly differ- ent from that in liquid-liquid at 30--60℃.

关 键 词：异丁醇 二元体系 液液相平衡 非随机(局部)双液体模型 遗传算法 

分 类 号：TQ028.4[化学工程]