摘要
采用液液萃取进行丁酮-水共沸物系的分离。测定了三元体系丁酮-水-(1-乙基-3-甲基咪唑醋酸盐)的液液平衡,采用NRTL活度系数方程对液液平衡数据进行回归得到组分间的二元交互作用参数。利用流程模拟软件ChemCAD进行了以离子液体为萃取剂的液液萃取过程的模拟,研究了理论板数、溶剂比(萃取剂摩尔流量和原料摩尔流量的比值)对萃取过程的影响,通过灵敏度分析,获得了优化的操作参数。在最适宜操作条件下,丁酮的摩尔分数可达0.999 4,离子液体经过回收能够直接循环使用。
The azeotropic system of methyl ethyl ketone （MEK）-water was separated by extraction. The liquid-liquid equilibrium of the ternary system of methyl ethyl ketone-water-（ 1-ethyl-3-methylimidazolium acetate） was measured. The liquid-liquid equilibrium data were correlated by NRTL activity coefficient model and the binary interaction parameters were obtained. The extraction process was simulated using ChemCAD simulation software with ionic liquid as solvent. The effects of the number of theoretical stages and solvent ratio （ the ratio of the molar flow rate of solvent to feed） on the extraction process were investigated. The optimal operation parameters were obtained by the sensitivity analysis, and the purity of MEK could reach 0. 999 4 in such conditions, and the ionic liquid was able to be recycled after recovery.
出处
《化学工业与工程》
CAS
2014年第5期65-69,79,共6页
Chemical Industry and Engineering
关键词
丁酮
水
离子液体
萃取
模拟
液液平衡
methyl ethyl ketone
water
ionic liquids
extraction
simulation
ChemCAD
