无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ

无机盐工业 ›› 2024, Vol. 56 ›› Issue (5): 64-69.doi: 10.19964/j.issn.1006-4990.2023-0364

• 研究与开发 • 上一篇    下一篇

乙二胺盐酸盐与氢氧化钙反应动力学

张雨1(), 赵贵琰1, 田永畅1, 邱小魁2, 孙佳丽2, 许立信3()   

  1. 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
  • 收稿日期:2023-07-11 出版日期:2024-05-10 发布日期:2024-05-15
  • 通讯作者: 许立信(1971— ),男,博士,教授,主要研究方向为工业催化和化工过程开发;E-mail:lxxu@ahut.edu.cn
  • 作者简介:张雨(1997— ),男,硕士在读,主要研究方向为无机材料的制备与工艺;E-mail:1398357442@qq.com
  • 基金资助:
    国家自然科学基金项目(22108238);国家自然科学基金项目(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)

Reaction kinetics of ethylenediamine hydrochloride with calcium hydroxide

ZHANG Yu1(), ZHAO Guiyan1, TIAN Yongchang1, QIU Xiaokui2, SUN Jiali2, XU Lixin3()   

  1. 1.Graduate School of Engineering,Anhui University of Technology,Ma'anshan 243002,China
    2.GBXF Silicones Co. ,Ltd. ,Ma'anshan 238251,China
    3.College of Chemistry and Chemical Engineering,Anhui University of Technology,Ma'anshan 243032,China
  • Received:2023-07-11 Published:2024-05-10 Online:2024-05-15

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-x2/3+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。

关键词: 乙二胺盐酸盐, 缩芯模型, 动力学, 氯化钙

Abstract:

The industrial production process of diamino silane coupling agent results in the generation of a significant quantity of ethylenediamine hydrochloride by-product.This by-product can be repurposed via neutralization reaction with calcium hydroxide to acquire anhydrous ethylenediamine.The conductivity method was utilized to establish the interdependence 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 ethylenediamine 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 internal diffusion primarily controlled the neutralization reaction between ethylenediamine hydrochloride and calcium hydroxide.The kinetic model Kt=1-3(1-x2/3+2(1-x) was applied,giving an activation energy of 30.89 kJ/mol.This study established a valuable empirical foundation for extracting anhydrous ethylenediamine from the by-product of ethylenediamine hydrochloride.

Key words: ethylenediamine hydrochloride, shrinking core model, kinetics, calcium chloride

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