以白云石为原料氨碱法制备球霰石及其生成机理研究

doi:10.11962/1006-4990.2020-0339

无机盐工业 ›› 2021, Vol. 53 ›› Issue (5): 56-60.doi: 10.11962/1006-4990.2020-0339

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.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. 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/Abstract

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

中图分类号:

TQ132.32

范天博,贾晓辉,韩冬雪,陈思,姜宇,胡婷婷,郭洪范,李莉,刘云义. 以白云石为原料氨碱法制备球霰石及其生成机理研究[J]. 无机盐工业, 2021, 53(5): 56-60.

Fan Tianbo,Jia Xiaohui,Han Dongxue,Chen Si,Jiang Yu,Hu Tingting,Guo Hongfan,Li Li,Liu Yunyi. Study on preparation of vaterite from dolomite by ammonia-alkali method and its mechanism[J]. Inorganic Chemicals Industry, 2021, 53(5): 56-60.

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以白云石为原料氨碱法制备球霰石及其生成机理研究

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

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以白云石为原料氨碱法制备球霰石及其生成机理研究

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