连续精馏分离氰乙酸甲酯工艺.pdf

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CHEMICAL INDUSTRY AND ENGINEERING PROGRESS
2008年第27卷第3期
连续精馏分离氰乙酸甲酯工艺
杨德明,郭新连
(江苏工.业学院化学化工学院,江苏常州213164
摘要:针对氰乙酸甲酯传统的间歌精馏分离过程,提出了连续精馏分离氰乙酸甲酯的三塔、四塔和五塔工艺流
程,并对3种分离流程进行工艺分析,确定了连续精馏五塔分离エ艺。利用 ASPEN PLUS软件中的 RADFRAC
精馏模型和 WILSON方程对五塔精馏分离流程进行优化模拟计算,得到了该流程的最佳工艺操作参数及相关的设
备参数。生产数据表明,与目前普遍采用的间歇精馏工艺相比、能耗降低了近30%,产品收率提高了2.4%,为
氰乙酸甲酯的连续分离开辟了一条新的工艺技术路线。
关键词:氰乙酸甲酯;间歌精馏;连精馏;分离;节能
中图分类号:TE624
文献标识码:A
文章编号:10006613(2008)03-0468-04
Technological research on separation of methyl cyanoacetate by
continuous distillation
YANG Deming, GUO inlian
C Faculty of Chemistry &Chemical Engineering, Jiangsu Polytechnic University, Changzhou 213164, Jiangsu, China
Abstract: Continuous distillation processes including three-tower, four-tower and five-tower for
separation of methyl cyanoacetate were proposed to replace the conventional batch distillation process
The best separation technology, that is five-tower continuous distillation, was determined based on the
process technological analysis. Optimization simulations of five-tower continuous distillation were
performed with ASPEN PLUS software in which RADFRAC model and WILSON equation were used
and the optimum operating conditions and equipment parameters were determined. The industrial data
showed that the five-tower continuous distillation can reduce energy consumption by 30, increase
product yield by 2.4% compared with the batch distillation. A new process scheme for continuous
separation of methyl cyanoacetate was established
Key words: methyl cyanoacetate; batch distillation; continuous distillation; separation; energy
consumption
氰乙酸甲酯是有机合成、医药、农药、染料的
重要中间体,应用领域广泛。目前国内氯乙酸甲脂
1连续精馏流程工艺分析
的提纯普遍采用歇精馏的分离方法,由于间歇精
氯乙酸甲酯粗液组成见表1。由于该料液组分比
馏存在操作强度大、产品质量不稳定、产品收率低、较复杂,而且各组分沸点、物性相差甚远,因此必
分离能耗高等间题引,一定程度上限制了装置的需采用多塔分离工と。本文作者提出了连续分离氰
生产能力,难以满足目前市场对其日益增加的需求。乙酸甲酯的三塔、四塔和五塔流程,并结合生产实
为此,本文首次提出了一种新的连续精馏分离氰乙际和分离物系的特点,对提出的3种分离方案进行
酸甲酯工艺,并对提出的连续精馏工艺进行流程设工艺分析,以筛选出比较合适的连续精馏分离工艺
计和模拟计算,以确定其最佳工艺操作参数和相关
设备参数,为氰乙酸甲酯的连续化分离提供一条切
收稿日期:2007-10-24:修改稿日期:2007-11-13。
实可行的工艺技术路线。
第一作者简介:杨德明(1966-),男,副教授,博主研究生,研究
方向为有机化工与化工模拟。E- mail dmy216④163,coms