摘要
采用单塔间歇恒沸精馏法,选择环己烷作为恒沸剂,分离异丙醇和水。应用ChemCAD5 2化工模拟软件中的CC BATCH间歇精馏模块对间歇恒沸精馏工艺过程进行了模拟计算,并应用最优模拟条件来指导实验,得到了环己烷异丙醇水三元体系的最优操作条件:进料质量比m(环己烷)/m(异丙醇)/m(水)=0 428/0 5/0 07,回流比19,汽化量0 3kg/h,塔板数7。采用环己烷异丙醇水三元非均相恒沸精馏脱水法将异丙醇与水分离,从含水12 6%左右的异丙醇溶液可制得含水小于0 3%的异丙醇产品,异丙醇单程质量收率可达61 1%。
A single column batch azeotropic distillation method was applied to the separation of isopropanol-water system with cyclohexane as an azeotropic agent. The optimum operating conditions of the batch rectifying tower for separating isopropanol-water azeotropic binary mixture were obtained by applying CC-Batch, a batch rectifying model of the chemical engineering simulative system named ChemCAD5.2, to simulation and calculation of the batch azeotropic distillation process, then they were used to direct the experiment, and through the experiment the optimum operating conditions for cyclohexane-isopropanol-water system were obtained as follows: the mass ratio of cyclohexane to iso-propanol and water in feedstock 0.428∶0.5∶0.072, reflux ratio 19, the vaporing amount 0.3kg/h and the number of theoretical tower tray 7. Using the three components heterogeneous azeotropic distillation method on cyclohexane-isopropanol-water system to dehydration, and recovery of isopropyl alcohol from isopropanol-water system, product isopropanol with less than 0.3wt% water was obtained from aqueous isopropanol containing 12.6 wt% water, and recovery rate of isopropanol was 61.1% by weight.
出处
《天然气化工—C1化学与化工》
CAS
CSCD
北大核心
2005年第2期6-10,共5页
Natural Gas Chemical Industry
关键词
异丙醇
水
恒沸精馏
过程模拟
恒沸剂
环己烷
isopropanol
water
bacth azeotropic distillation
process simulation
entrainer
cyclohexane
