| 磷石膏湿法偶联除杂规律初探 |
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| 引用本文： | 吴宝建,吕昕峰,张清杰,易美桂,向兰.磷石膏湿法偶联除杂规律初探[J].无机盐工业,2020,52(12):55-58. |
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| 作者姓名： | 吴宝建 吕昕峰 张清杰 易美桂 向兰 |
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| 作者单位： | 1.四川大学化学工程学院,四川成都 6100652.清华大学化学工程系 |
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| 基金项目： | 国家自然科学基金资助(21978153) |
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| 摘 要： | 磷石膏资源丰富,但共存杂质多,应用受限。为此探讨了采用硅烷偶联剂对磷石膏进行湿法偶联除杂的工艺规律。结果表明：硅烷偶联剂可与磷石膏中的二氧化硅和羧基类有机杂质通过氢键及脱水缩合的方式结合,使相应杂质疏水悬浮并通过刮除分离除去,由此制得纯度为96.2%（以CaSO4·0.5H2O计）、白度为92.2%的纯化石膏。
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| 关 键 词： | 磷石膏 除杂增白 硅烷偶联剂 |
| 收稿时间： | 2020-06-17 |
Primary exploration of removing impurities from phosphogypsum by wet coupling process |
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| Wu Baojian,Lü Xinfeng,Zhang Qingjie,Yi Meigui,Xiang Lan.Primary exploration of removing impurities from phosphogypsum by wet coupling process[J].Inorganic Chemicals Industry,2020,52(12):55-58. |
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| Authors: | Wu Baojian Lü Xinfeng Zhang Qingjie Yi Meigui Xiang Lan |
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| Affiliation: | 1. School of Chemical Engineering,Sichuan University,Chengdu,610065,China2. Department of Chemical Engineering,Tsinghua University |
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| Abstract: | The utilization of phosphogypsum resource was limited by the co-existence of the impurities.The technology rule of removing impurities from phosphogypsum with silane coupling agent by wet coupling process was discussesed.Results showed that the silane coupling agent can combine with silica and carboxyl organic impurities in phosphogypsum by hydrogen bonding and dehydration condensation to make the corresponding impurities hydrophobic suspended and separated from by scraping,and leading to the formation of gypsum with a purity of 96.2%（CaSO4·0.5H2O） and a whiteness of 92.2%. |
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| Keywords: | phosphogypsum removing impurities and whitening silane coupling agent |
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