| 常温合成条件对两步法制备氢氧化镁阻燃剂中试研究的影响 |
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| 引用本文： | 李志强,吴庆流,向兰,魏飞.常温合成条件对两步法制备氢氧化镁阻燃剂中试研究的影响[J].化工学报,2005,56(6):1106-1111. |
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| 作者姓名： | 李志强 吴庆流 向兰 魏飞 |
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| 作者单位： | 清华大学化学工程系，北京 100084 |
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| 摘 要： | 在自行研制的中试设备上用两步法（氢氧化钠合成法-水热反应法）制备出了氢氧化镁阻燃剂，分析了常温合成条件对制备氢氧化镁的影响.研究发现在相同的水热条件下，提高常温合成温度和降低氢氧化钠加料速率，有利于常温产物的水热改性处理，使之生成形貌规则、粒径分布均匀、分散性良好的氢氧化镁六方片状颗粒.
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| 关 键 词： | 氢氧化镁 常温合成 水热改性 形貌与结构 分散性 |
| 文章编号： | 0438-1157(2005)06-1106-06 |
| 收稿时间： | 2004-4-5 |
| 修稿时间： | 2004-5-14
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Influence of synthesis condition on magnesium hydroxide properties by two-step reaction on pilot scale |
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| LI Zhiqiang,WU Qingliu,XIANG Lan,WEI Fei.Influence of synthesis condition on magnesium hydroxide properties by two-step reaction on pilot scale[J].Journal of Chemical Industry and Engineering(China),2005,56(6):1106-1111. |
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| Authors: | LI Zhiqiang WU Qingliu XIANG Lan WEI Fei |
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| Abstract: | In order to resolve the problem that Mg(OH)_2 is incompatible with the polymer, the two-step reaction of Mg(OH)_ 2 preparation, synthesis reaction and hydrothermal modification, is one of the useful techniques. In this study, the synthesis reaction conditions of MgCl_2-NaOH route were investigated in a large-scale experimental set-up designed by authors, with focus on the influence of synthesis temperature and NaOH solution feeding rate on the morphology, particle sizes, crystalline structure and dispersion properties of the synthesis products and hydrothermal products. The regular hexagonal plates of Mg(OH)_ 2 with a larger particle size and a smaller specific area were formed after hydrothermal treatment.The dispersion properties of the hydrothermal products were improved owing to the alteration of growth direction for Mg(OH)_ 2 crystals, resulting in the increase of I_ (001)/I_ (101). Under the experimental conditions, the increase of synthesis temperature and decrease of NaOH solution feeding rate were favorable to improving the morphology and dispersion properties of the synthesis products and hydrothermal products owing to the damage of the adsorption layer on the crystal surface. |
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| Keywords: | magnesium hydroxide normal temperature synthesis reaction hydrothermal modification morphology dispersion |
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