Experimental and theoretical studies on vapor liquid equilibrium for formaldehyde + 1,3,5-trioxane + sulphuric acid + water system

被引：0
|
作者：
Zhang X. [1 ,2 ]
Hu Y. [1 ]
机构：
[1] State Key Laboratory of Heavy Oil Processing and High Pressure Fluid Phase Behavior & Property Research Laboratory, China University of Petroleum, Beijing
[2] Department of Chemical Engineering, Ordos Institute of Technology, Ordos, 017000, Inner Mongolia
来源：
Huagong Xuebao/CIESC Journal | 2020年 / 71卷 / 01期
关键词：
1,3,5-trioxane reaction system; Activity coefficient; Catalysis; Vapor liquid equilibria;
D O I：
10.11949/0438-1157.20191242
中图分类号：
学科分类号：
摘要：
1,3,5-Trioxane is industrially produced from aqueous formaldehyde solutions through reaction distillation catalyzed by sulfuric acid. Optimizing industrial process of the synthesis and developing new catalysts have attracted extensive attention. It is necessary to establish a vapor-liquid equilibrium model of the reaction system and reveal the multiple functions that the catalyst may play in the synthesis of 1,3,5-trioxane. For this reason, experimental data for the vapor-liquid equilibrium of (formaldehyde + 1,3,5-trioxane + H2SO4 + water) system are measured. The extended UNIFAC model is used for correlating the vapor-liquid equilibrium data, and the model parameters are determined, whereby systematic calculation is made. The results show that the sulfuric acid catalyst has triple functions in the reaction distillation process. The above results are of great significance for optimizing the production process of 1,3,5-trioxane and developing new catalysts. © All Right Reserved.
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页码：216 / 224
页数：8
相关论文
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