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 (5): 56-60.doi: 10.11962/1006-4990.2020-0339

• 研究与开发 • 上一篇    下一篇

以白云石为原料氨碱法制备球霰石及其生成机理研究

范天博1(),贾晓辉1,韩冬雪1,陈思1,姜宇1,胡婷婷1,郭洪范1,李莉2,刘云义1   

  1. 1.沈阳化工大学化学工程学院,辽宁省化工应用技术重点实验室,辽宁沈阳 110142
    2.沈阳化工大学计算机科学与技术学院
  • 收稿日期:2020-08-11 出版日期:2021-05-10 发布日期:2021-05-12
  • 作者简介:范天博(1976— ),男,博士,副教授,主要研究方向为无机化学工程;E-mail address: eftb@163.com
  • 基金资助:
    国家自然基金(61102041);辽宁省高校创新团队支撑计划(2013010);国家科技支撑计划(2013BAB09B01);辽宁省教育厅项目(L2013169);辽宁省精细化工协同创新中心资助项目;辽宁省自然基金(201602582);辽宁省自然科学基金指导计划项目:基于涡致振动的宽带压电能量收集结构研究(2019-ZD-0075)

Study on preparation of vaterite from dolomite by ammonia-alkali method and its mechanism

Fan Tianbo1(),Jia Xiaohui1,Han Dongxue1,Chen Si1,Jiang Yu1,Hu Tingting1,Guo Hongfan1,Li Li2,Liu Yunyi1   

  1. 1. Liaoning Provincial Key Laboratory of Chemical Application Technology,College of Chemical Engineering,Shenyang University of Chemical Technology,Shenyang 110142,China
    2. College of Computer Science and Technology,Shenyang University of Chemical Technology
  • Received:2020-08-11 Published:2021-05-10 Online:2021-05-12

摘要:

采用仿Solvay氨碱法,以白云石为起始原料,在碱性环境下制备出高球霰石含量的碳酸钙。XRD和SEM表征结果显示,碳化温度为20~40 ℃时的产品为球霰石;40~60 ℃时的产品为方解石;60~90 ℃时的产品为文石。球霰石的高倍SEM发现产品有许多微孔结构,对产品进行比表面积测定为32.653 m2/g,孔径为2.972 nm,为生物分子的装载提供了良好的空间。对球霰石的形成机理分析表明,NH4+-NH3缓冲体系不仅可以增加碳酸钙的过饱和度,还可以改善溶液环境,为球霰石的生长提供了一个良好的溶液环境,溶液中微量的Mg2+起到了促进完好晶型形成的作用。

关键词: 白云石, 缓冲体系, 球霰石, 碳酸钙

Abstract:

Calcium carbonate with high content of vaterite was prepared by imitating Solvay ammonia-alkali method with dolomite as starting material in alkaline environment.The results of XRD and SEM showed that the product with carbonization temperature of 20~40 ℃ was vaterite,40~60 ℃ was calcite and 60~90 ℃ was aragonite.The high magnification SEM of vaterite showed that the product had many microporous structures.The specific surface area of the product was determined to be 32.653 m2/g and the pore size was 2.972 nm.It provides a good space for the loading of biomolecules.The analysis of the formation mechanism of vaterite showed that the NH4+-NH3 buffer system could not only increase the supersaturation of calcium carbonate in the solution,but also improve the solution environment and provide a good solution environment for the growth of vaterite.The trace amount of Mg2+ in the solution played a role in promoting the formation of intact crystal forms.

Key words: dolomite, buffer system, vaterite, calcium carbonate

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