连续复合精馏提取裂解C9芳烃中三甲苯  

Refining of trimethylbenzen fraction from C_9 arenes by continuous and composite distillation

作　　者：詹其伟[1] 顾正桂[1] 姚小利[2] 刘波[2] 曹宇锋[1] 

机构地区：[1]南京师范大学江苏省萃取分离工程技术研究中心,江苏南京210097 [2]中国石化扬子石油化工有限公司研究院,江苏南京210048

出　　处：《化学工程》2010年第4期4-7,共4页Chemical Engineering(China)

基　　金：中石化科技项目(408017)

摘　　要：对乙烯生产过程中的主要副产物裂解C9芳烃的用途简要概括;提出采用连续复合精馏法提取裂解C9芳烃中的三甲苯馏分,为生产二甲苯歧化反应提供原料,建立连续复合精馏装置,精馏段采用θ环填料结构,提馏段采用泡罩板式结构,研究进料体积流量、塔板数、出料体积流量及回流体积比对分离过程的影响,并采用气质联用色谱分析实验结果。在优化条件下,可以将三甲苯的质量分数由原料中的8.28%提高至22.33%,收率94.37%。同时采用ASPEN PLUS软件对实验进行模拟,实验值与模拟值最大相对平均误差为-0.46%。为进一步放大实验及萃取精馏提取高纯度三甲苯馏分提供依据。The main by-product C9 arenes in ethylene production was summarized. The continuous and composite distillation method was adopted to refine tfimethylhenzen fraction from C9 arches, and trimethylbenzen fraction could be used to produce dimethylbenzene. The experimental apparatus for continuous and composite distillation was set up. 0 ring-structured packing was used in the rectifying section and bubble cap column was applied in the stripping section. The influences of experimental conditions such as feed volume flow rate, number of column plates, out- feed volume flow rate and reflux volume ratio on the separation process were studied. The experimental results were analyzed by gas chromatograph and mass spectrometer, so the composition and physical property of each substance were received. Under the optimal conditions, the mass fraction of trimethylbenzene is enhanced from 8.28% to 22.33%, and the yield is 94.37%. At the same time, the separation results were simulated by ASPEN PLUS, and the max. relative mean fractional error between the experiment value and the simulation value is - 0.46%. Such result provides the basis for further research and exaction distillation of refining pure trimethylbenzen.

关 键 词：裂解C9芳烃 连续复合精馏 三甲苯 

分 类 号：TQ202.8[化学工程—有机化工]