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 ›› 2021, Vol. 53 ›› Issue (3): 48-53.doi: 10.11962/1006-4990.2020-0216

• 研究与开发 • 上一篇    下一篇

氯化铵转化新工艺的机理及条件探究

李非1,2,3(),周建敏1,李铖钰1,徐文涛1,张昕玥1,李欣伟1,王军1,2,3,纪志永1,2,3,赵颖颖1,2,3,郭小甫1,2,3,袁俊生1,2,3()   

  1. 1.河北工业大学化工学院/海水资源高效利用化工技术教育部工程研究中心,天津300130
    2.河北省现代海洋化工技术协同创新中心
    3.河北工业大学化工学院/化工节能过程集成与资源利用国家-地方联合工程实验室
  • 收稿日期:2020-09-17 出版日期:2021-03-10 发布日期:2021-03-11
  • 通讯作者: 袁俊生
  • 作者简介:李非(1986— ),女,博士,讲师,研究方向为溶液化学、计算化学、分离纯化;E-mail:lifei2008@hebut.edu.cn
  • 基金资助:
    大学生创新创业训练计划项目(X201910080006X);河北省自然科学基金项目(B2017202246);河北省自然科学基金项目(E2020202020);河北省高等学校科学技术研究项目(QN2019048);国家重点研究发展计划项目(2016YFB0600504);教育部创新团队发展计划项目(IRT14R14);河北省现代海洋化工技术协同创新中心项目(冀教科[2013]37号);河北工业大学本科教育教学改革研究项目(201903020);面向新工科高校人才培养需求的创新实践教育模式的构建——以化工、海洋、环境类专业为例(2018GJJG032)

Study on mechanism and conditions of the new process of ammonium chloride conversion

Li Fei1,2,3(),Zhou Jianmin1,Li Chengyu1,Xu Wentao1,Zhang Xinyue1,Li Xinwei1,Wang Jun1,2,3,Ji Zhiyong1,2,3,Zhao Yingying1,2,3,Guo Xiaofu1,2,3,Yuan Junsheng1,2,3()   

  1. 1. School of Chemical Engineering,Hebei University of Technology,Engineering Research Center for Chemical Technology of the Efficient Utilization of Seawater Resources,Tianjin 300130,China
    2. Collaborative Innovation Center of Hebei Modern Marine Chemical Technology
    3. School of Chemical Engineering,Hebei University of Technology,Chemical Energy Conservation Process Integration and Resource Utilization National-Local Joint Engineering Laboratory
  • Received:2020-09-17 Online:2021-03-10 Published:2021-03-11
  • Contact: Yuan Junsheng

摘要:

针对目前纯碱产业氯化铵产能过剩的问题,提出一种氯化铵转化新思路。即以固体氯化铵和碳酸镁为原料,采用固相加热反应生成氯化镁、氨气、二氧化碳和水,其中氨气和二氧化碳可回收用于纯碱的生产。从热力学角度分析了固体氯化铵和碳酸镁的反应机理,探讨了反应温度、反应时间和配料比对氯化铵转化率的影响,进行了正交实验并确定了最优反应工艺条件,对反应产物进行了X射线衍射(XRD)、扫描电镜(SEM)和能谱(EDS)表征。最佳反应条件:碳酸镁与氯化铵物质的量比为1.8∶2.0,反应温度为523 K,反应时间为120 min。在该反应条件下氯化铵转化率可达94.40%,氯化镁纯度可达工业标准。

关键词: 纯碱, 氯化铵, 氯化镁, 反应机理, 热力学

Abstract:

Aiming at the problem of excess capacity of ammonium chloride in soda industry,a new way of conversion of ammonium chloride was put forward.Solid ammonium chloride and magnesium carbonate were used as raw materials to produce magnesium chloride,ammonia,carbon dioxide and water by solid-state heating reaction.Ammonia and carbon dioxide can be recycled using for soda production.The reaction mechanism of solid ammonium chloride and magnesium carbonate was investigated from the thermodynamics,and the effects of reaction temperature,reaction time and ratio of ingredients on the conversion of ammonium chloride were discussed.The orthogonal experiment was carried out to determine the optimal reaction conditions,the products were characterized by XRD,SEM and EDS.The results show that the optimum reaction conditions were as follows:the amount-of-substance ratio of magnesium carbonate and ammonium chloride was 1.8∶2.0,the temperature was 523 K and the reaction time was 120 min.Under the conditions,the conversion ratio of ammonium chloride can reach 94.40% and the purity of magnesium chloride can reach the industrial standard.

Key words: soda ash, ammonium chloride, magnesium chloride, reaction mechanism, thermodynamics

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