连续减压双塔精馏法提取裂解C_9芳烃中的茚

Refining of indene fraction from C_9 cracked aromatic by double continuous and vacuum distillation

概述了裂解C9芳烃中茚在工业生产中的应用,提出采用连续减压双塔精馏法初步浓缩裂解C9芳烃中茚的方法。采用Aspen Plus软件考察压力、塔板数、回流比、进料位置、进出料比等参数对分离过程的影响,并优化过程条件;根据模拟优化条件,建立连续减压精馏装置,减压塔采用弹簧填料式结构,进行2次减压精馏实验研究,考察回流比及进出料比等参数对茚质量分数及收率影响,比较模拟和实验结果,确定分离过程最佳条件,为进一步研究提纯茚的含量以及工业上放大实验连续减压精馏法提取茚提供基础和依据。

Summarizing that the indene of C9 cracked aromatic was widely used in industry, the method of double continuous and vacuum distillation was proposed to refine indene fraction from C9 cracked aromatic. The continuous distillation was simulated by Aspen Plus, and the conditions of simulation such as pressure, theoretical plate number, feeding position, reflux ratio and tower top output rate were studied. The process conditions were optimized. According to the simulating optimization, the continuous and vacuum distillation experiment apparatus were set up, and the spring packing structure was applied in vacuum column. The vacuum distillation experiment. was conducted, and the influences of the reflux ratio and output rate on indene purity and yield were investigated. The experimental results were compared with the simulation result of Aspen Plus in order to determine the best distillation conditions, thus providing the reference for the further study about the indene purity and the continuous vacuum distillation of refining pure indene in the industry.