环己烯水合生成环己醇过程设计与优化

提出一种利用反应精馏并加入异佛尔酮作为助溶剂的新方法生产环己醇.反应原料环己烯和水以及助溶剂异佛尔酮进入反应精馏塔RDC,RDC釜液再经过两个精馏塔(PDC1和PDC2)进行纯化分离得到高纯度的环己醇和可以循环使用的异佛尔酮.选用NRTL物性计算方法,使用Aspen Plus流程模拟软件对设计流程进行模拟计算,最终可得到摩尔分数为99.9%的高纯度环己醇产品以及可循环使用的异佛尔酮,系统能耗为0.982 3k W.在此计算结果的基础上,研究反应精馏塔中异佛尔酮和环己烯、水和环己烯的摩尔配比,以及塔压对环己烯转化率和系统能耗的影响,对整个工艺流程进行了优化,并和其他工艺的环己烯转化率进行了比较.

Design and optimization of the cyclohexene direct hydration process

A process used reactive distillation with isophorone as a cosolvent to produce cyclohexanol was proposed in this paper. Feeding the reactants cyclohexene and water with the cosolvent isophorone into the reactive distillation column(RDC), then using two rectifying columns(PDC1 and PDC2) to purify and separate the bottom product, a high-purity product of cyclohexanol can be obtained and the purity of isophorone can be recycle back to the RDC. The whole processSwasSsimulatedSwithSthe NRTL thermodynamicSequation, then it was simulated and calculated by the Aspen Plus software, a high-purity cyclohexanol(99.9 mol%) and a recyclable isophorone can be obtained finally, the heat duties of the system were 0.9823kw. On the basis of the calculation, we discussed the operatingSconditions including the molar ratioSof isophorone and cyclohexene, the molar ratio of water and cyclohexene, the pressure of column, which have effects on the cyclohexene conversion and heat duty of the system to optimize the process, and the cyclohexene conversion of the proposed process is compared with other process, the result showed that the proposed process is a favorable way to produce cyclohexanol.