乙二胺盐酸盐与氢氧化钙反应动力学  

Reaction kinetics of ethylenediamine hydrochloride with calcium hydroxide

作　　者：张雨 赵贵琰 田永畅 邱小魁 孙佳丽 许立信[3] ZHANG Yu;ZHAO Guiyan;TIAN Yongchang;QIU Xiaokui;SUN Jiali;XU Lixin(Graduate School of Engineering,Anhui University of Technology,Ma'anshan 243002,China;GBXF Silicones Co.,Ltd.,Ma'anshan 238251,China;College of Chemistry and Chemical Engineering,Anhui University of Technology,Ma'anshan 243032,China)

机构地区：[1]安徽工业大学工程研究院,安徽马鞍山243002 [2]安徽硅宝有机硅新材料有限公司,安徽马鞍山238251 [3]安徽工业大学化学与化工学院,安徽马鞍山243032

出　　处：《无机盐工业》2024年第5期64-69,共6页Inorganic Chemicals Industry

基　　金：国家自然科学基金项目(22108238,U22A20408);安徽省自然科学基金青年基金项目(1908085QB68);安徽省科技重大专项(201903a05020055);中国博士后面上项目(2019M662060)。

摘　　要：在双氨基硅烷偶联剂的工业生产过程中会产生大量的乙二胺盐酸盐副产物,该副产物通过与氢氧化钙进行中和反应得到无水乙二胺,可实现乙二胺的循环利用。利用电导率法建立乙二胺盐酸盐转化率和电导率的关系,考察了液固比、盐浓度、温度等因素对乙二胺盐酸盐转化率的影响,并确定了最优工艺条件。实验结果表明,乙二胺盐酸盐的转化率随着液固比及乙二胺盐酸盐浓度的增大而降低。基于缩芯模型,建立乙二胺盐酸盐和氢氧化钙的动力学方程。根据实验数据求出反应过程的活化能,发现乙二胺盐酸盐和氢氧化钙的中和反应主要受内部扩散控制。动力学模型为Kt=1-3(1-x)^(2/3)+2(1-x),活化能为30.89 kJ/mol。该研究为从乙二胺盐酸盐副产物提取无水乙二胺提供了实验依据。The industrial production process of diamino silane coupling agent results in the generation of a significant quan-tity of ethylenediamine hydrochloride by-product.This by-product can be repurposed via neutralization reaction with cal-cium hydroxide to acquire anhydrous ethylenediamine.The conductivity method was utilized to establish the interdepen-dence of ethylenediamine hydrochloride conversion rate and conductivity.The impact of various factors including liquid-solid ratio,salt concentration,and temperature on the conversion rate of ethylenediamine hydrochloride was explored and the optimal process conditions were determined.The experimental results indicated that the conversion rate of ethylenedi-amine hydrochloride was declined with the increase of liquid-solid ratio and ethylenediamine hydrochloride concentration.The kinetic equations for ethylenediamine hydrochloride and calcium hydroxide were established based on the shrinking core model.The experimental data was analyzed to determine the activation energy of the reaction process,revealing that in-ternal diffusion primarily controlled the neutralization reaction between ethylenediamine hydrochloride and calcium hydrox-ide.The kinetic model Kt=1-3(1-x)^(2/3)+2(1-x)was applied,giving an activation energy of 30.89 kJ/mol.This study estab-lished a valuable empirical foundation for extracting anhydrous ethylenediamine from the by-product of ethylenediamine hy-drochloride.

关 键 词：乙二胺盐酸盐 缩芯模型 动力学 氯化钙 

分 类 号：TQ115[化学工程—无机化工]