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 ›› 2022, Vol. 54 ›› Issue (1): 29-33.doi: 10.19964/j.issn.1006-4990.2021-0169

• 研究与开发 • 上一篇    下一篇

煅烧白云石粉制备微纳米级圆片状氢氧化镁

范天博1(),胡婷婷1,韩冬雪1,贾晓辉1,赵一波1,王新安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.辽宁省化工过程工业智能化技术重点实验室
  • 收稿日期:2021-03-19 出版日期:2022-01-10 发布日期:2022-03-14
  • 作者简介:范天博(1976— ),男,博士,副教授,研究方向为无机化学工程;E-mail: eftb@163.com
  • 基金资助:
    国家自然科学基金(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;辽宁省自然科学基金(201602582);辽宁省高等学校创新人才支持计划(LR2018078);辽宁省自然科学基金材料联合基金(20180510007);辽宁省自然科学基金指导计划项目(2019ZD0075);菱镁固废化工材料高值利用技术与基地集成示范(2020YFCI909300);辽宁省教育厅项目(LJKZ0431)

Preparation of micro-nano round flake magnesium hydroxide from calcined dolomite powder

FAN Tianbo1(),HU Tingting1,HAN Dongxue1,JIA Xiaohui1,ZHAO Yibo1,WANG Xin′an1,GUO Hongfan1,LI Li2,LIU Yunyi1   

  1. 1. College of Chemical Engineering,Shenyang University of Chemical Technology,Shenyang 110142,China
    2. Liaoning Provincial Key Laboratory of Chemical Application Technology
  • Received:2021-03-19 Published:2022-01-10 Online:2022-03-14

摘要:

以白云石为原料,通过氨法制备出高纯度(99.30%)圆片状的阻燃型微纳米级氢氧化镁。探究了反应温度、通氨速率、氨镁物质的量比对氢氧化镁分散性和形貌的影响,确定最佳工艺条件:反应温度为80 ℃、通氨速率为150 mL/min、氨镁物质的量比为23∶1。用扫描电镜、透射电子显微镜、X射线衍射仪、激光粒度分析仪、热重分析仪和白度仪表征产品的形貌、结构、粒度及稳定性。结果表明制得的圆片状微纳米级氢氧化镁的分散性好、晶型完整、粒度均匀,D50为2.493 μm、D90为6.132 μm、直径约为5.7 μm、厚度约为0.7 μm、长厚比约为8∶1。稳定性好、灼烧失量为31.03%、白度为97.4,高于工业氢氧化镁行业标准。

关键词: 白云石, 圆片状氢氧化镁, 阻燃剂

Abstract:

Micro-nano-sized high-purity(99.30%) round flake magnesium hydroxide as the flame retardant was prepared from dolomite by ammonia method.The effect of reaction temperature,ammonia-passing rate,ammonia-magnesium molar ratio on the dispersion and morphology of magnesium hydroxide were investigated.The optimal process conditions were determined:reaction temperature was 80 ℃,ammonia-passing rate was 150 mL/min,and ammonia-magnesium molar ratio was 23∶1.The morphologies,structures,size distributions and stability of products were characterized through scanning electron microscope,transmission electron microscope,X-ray diffractometer,laser particle analyzer,thermogravimetric analyzer and whiteness meter.The results showed that the prepared round flake micro-nano-sized magnesium hydroxide flame retardant had high dispersibility,complete crystal shape,uniform particle size with D50 of 2.493 μm,D90 of 6.132 μm,diameter of about 5.7 μm,thickness of about 0.7 μm and length thickness ratio of about 8∶1.The stability was good,the ignition loss was 31.03%,and the whiteness was 97.4,which was higher than industrial magnesium hydroxide industry standard.

Key words: dolomite, round flake magnesium hydroxide, flame retardant

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