文献类型：期刊文献

中文题名：超(近)临界条件下醋酸甲酯的水解工艺

英文题名：Hydrolysis of Methyl Acetate under Near-or Supercritical Condition

作者：袁佩青[1];程振民[1];刘涛[1];袁渭康[1]

机构：[1]华东理工大学联合化学反应工程研究所,上海200237

年份：2003

卷号：29

期号：3

起止页码：225

中文期刊名：华东理工大学学报（自然科学版）

外文期刊名：Journal of East China University of Science and Technology

收录：CSTPCD;;EI(收录号：2003307568876);Scopus;北大核心:【北大核心2000】；CSCD:【CSCD2011_2012】；

基金：973国家重点基础研究发展规划项目

语种：中文

中文关键词：水解;醋酸甲酯;近临界;超临界;相分离

外文关键词：hydrolysis; methyl acetate; near critical; supercritical; phase split

摘要：近临界水与有机物的优异互溶和对有机反应的酸碱催化能力 ,为绿色化学合成工艺的开发提供了良好的契机。本文以醋酸甲酯水解为研究对象 ,在管式及釜式反应器中 ,采用工业装置的进料水酯比 ,研究了在超 (近 )临界条件 (5 2 3～ 673 K,2 3～ 3 2 MPa)下的反应行为 ,同时利用反应区域相分离技术改善了反应后期的转化率。实验结果表明 ,醋酸甲酯水解能够在 1 5 0～ 2 0 0 s停留时间范围内接近反应平衡转化率 (水酯摩尔比 2∶ 1时转化率达到 41 % ) ,无需外加酸性催化剂 ,通过加入相分离介质苯 ,在短停留时间内转化率能提高 3 %。与现有水解工艺比较表明 ,超临界水解工艺在技术上有较高竞争力。
Near or supercritical water is an excellent solvent and acid/base catalyst for organic reactions, which provides opportunity for environmental benign innovation in conventional chemical engineering process. The work presented in this paper focuses on investigation of noncatalytic hydrolysis of methyl acetate in a tubular and stirred reactors under near or supercritical condition (523～673 K,23～32 MPa),and phase split is applied to improve the conversion. The experimental results show that under optimized operating condition the conversion of methyl acetate achieves thermodynamic equilibrium within 150 s to 200 s for different concentrations of feedstock, the selectivity of which closes to 1, with no acid catalyst added. Specifically at the inlet concentration of 2∶1 (molar ratio of water to methyl acetate) adopted in industrial practice, 41% conversion was attained; also the conversion can be improved 3% in certain circumstance with benzene added. Conclusion drawn from this work indicates promising prospect of applying near or supercritical reaction technology to the industrial practice of hydrolysis of methyl acetate.