隔离壁萃取精馏塔分离甲乙酮/水

利用隔离壁萃取精馏塔分离甲乙酮/水的共沸物。考察了溶剂比、回流比和进料速度对分离过程的影响。当溶剂比为3、回流比为3.5、进料速度为1.6 mL/min时,塔顶甲乙酮的质量分数达到98.8%,塔釜乙二醇质量分数达到96.3%。利用Asp-en Plus对该新工艺进行了模拟。结果表明,模拟值与实验值相一致。此新工艺比常规萃取精馏工艺节能5.6%。

Study of Separation of 2-Butanone/Water with Divided Wall Extractive Distillation Column

A divided wall extractive distillation column was used to separate azeotrope of 2-butanone and water.The influence of ratio of solvent and feed,reflux ratio,flow rate on process was investigated.The mass fraction of 2-butanone reached 98.8% in top stream and mass fraction of ethylene glycol in bottom stream reached 96.3% under the condition that feed rate was 1.6 mL/min,ratio of solvent and feed was 3,reflux ratio was 3.5.This novel process was simulated by Aspen Plus soft.The results showed that the value of simulation was accordant with the value of experiment.This novel process,compared with conventional extractive distillation process,could save energy consumption up to 5.6%.