基于Aspen Plus的紫罗兰酮异构体精馏分离模拟

Aspen Plus simulation on distillation separation of ionone isomers

使用物质替代法和物性估算法对紫罗兰酮混合物精馏分离过程进行模拟。当进料流股为质量分数15%的替代物质A和85%的替代物质B混合物,或质量分数为15%的α-紫罗兰酮和85%的β-紫罗兰酮混合物时,分别考察进料位置、塔板数、回流比、塔釜采出率等参数对塔顶、塔釜采出物质质量分数的影响。结果表明,在质量流量为100 kg/h的进料条件下,操作最优参数分别为进料位置12,塔板数60,回流比5,塔釜采出率0.66。此时可使塔顶α-紫罗兰酮(或替代物质A)和塔底β-紫罗兰酮(或替代物质B)的质量分数分别达到68%和96%。2种方法所得操作参数基本相同,且满足分离要求,能够为精馏塔设计提供可靠的依据。

The substance substitution and property estimation methods are used in the simulation on the distillation separation process of ionone isomers. One feed stream composes 15% mass fraction of substitution substance A and 85%of substitution substance B,and another feed stream composes 15% α-ionone and 85% β-ionone. The influences of feed position,number of plates,reflux ratio and the ratio of bottom stream to feed on the purities of products from the top and the bottom of column are researched. The results show that when the feed flow rate of ionone isomers is 100 kg·h-1,the optimum operation parameters are as follows： the feed position is at the No. 12 plate; the theoretical number of plates is60,the reflux ratio is 5 and the ratio of bottom stream to feed is 0. 66. Under the optimal conditions,the purities of α-ionone（ or substitution substance A） from the top and β-ionone（ or substitution substance B） from the bottom can reach68% and 96% respectively. The operation parameters gained in two ways are nearly same and both can meet the separation requirements for ionone isomers,which can supply the distillation column design with reliable basis.