粗酚的间歇精馏分离模拟  

Simulation on batch distillation of crude phenol

作　　者：秦飞飞[1,2,3] 熊杰明 孙培志 韩世琳[2,3] 葛明兰[2,3] 

机构地区：[1]北京化工大学化学工程学院,北京100029 [2]燃料清洁化及高效催化减排技术北京市重点实验室,北京102617 [3]北京石油化工学院化学工程学院,北京102617

出　　处：《现代化工》2017年第9期184-187,共4页Modern Chemical Industry

基　　金：国家科技支撑计划课题(2015BAK16B03)

摘　　要：以工业粗酚原料为研究对象,利用Aspen Batch Modeler对其进行间歇精馏分离过程模拟计算,物性方法选择NRTLRK,未知物性采用UNIFAC估算,在目标产物苯酚、邻甲酚、间甲酚的质量分数分别为99.0%、96.0%、90.0%的前提下,分别考察了塔操作压力、理论板数、回流比、过渡馏分、杂质含量等多个因素对苯酚、邻甲酚、间对甲酚产品收率的影响情况。结果表明,塔板数增加、回流比增加均可以提高产品收率;操作压力减小会使苯酚的收率略微下降,而邻甲酚和间对甲酚的收率增加;过渡馏分的采集,可使组分的纯度和收率显著增加;中性油和吡啶等杂质的存在会导致产品质量和收率明显下降。模拟结果与现有工业化装置分离情况基本相符。Aspen Batch Modeler is used to simulate the batch distillation separation process of industrial crude phenol.Taking NRTL-RK as property methods and using UNIFAC to estimate unknown properties,the effects of the operation pressure for tower,number of theoretical tower plate,reflux ratio,slop cut in batch distillation,impurities and other factors on the yields of phenol,o-cresol,m-cresol are investigated respectively under the the premise that the purity of the target products phenol,o-cresol and m-cresol are 99. 0%,96. 0% and 90. 0% separately.The results show that the increase of both the number of tower plates and reflux ratio can improve products＇ yields; the decrease of tower ＇s operation pressure will decrease the yield of phenol slightly while increase the yields of o-cresol and m-cresol; the collection of slop cuts in batch distillation can improve the purity of the composition and yields significantly. The existences of neutral oils and pyridine can result in the significant decrease of quality and yield of products. The simulation results are basically consistent with the separation of existing industrial plants.

关 键 词：间歇精馏 粗酚 模拟 

分 类 号：TQ523.5[化学工程—煤化学工程]