摘要
引言
环己烷是一种性能较好的溶剂,可用来取代苯作脱油脂剂及脱漆剂等,因其一般通过苯催化加氢或汽油分馏来制备,在其产物中通常存在苯和环己烷的混合物,由于二者沸点相近,能形成最低共沸混合物,所以如何对苯和环己烷混合物系进行分离,许多研究人员对此进行了研究。
Ternary mixed solvents,composed of DMF（N,N-dimethylformamde）,DMSO（dimethylsulfoxide）and NMP（N-methylpyrrolidone）for separation of benzene and cyclohexane by extractive distillation,were examined in a vapor-liquid equilibrium experimental apparatus.The relative volatilities of benzene and cyclohexane were investigated.It was found that the ternary mixed solvents presented better ＂mixed solvent effect＂,and were superior to the single solvent.The relative volatilities of benzene and cyclohexane at different molar mixed solvent ratios were determined,and the optimal molar ratio of the ternary mixed solvents was obtained.The modified MDNUIFAC model was used to correlate the experimental data,and the vapor-liquid equilibrium of benzene-cyclohexane-solvents system can be described well by the modified MDUNIFAC model.
出处
《化工学报》
EI
CAS
CSCD
北大核心
2011年第9期2541-2545,共5页
CIESC Journal
基金
国家自然科学基金项目(21076126)
辽宁省教育厅项目(2009A584)~~
