| 利用多晶硅生产废物制备偏硅酸钠 |
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| 引用本文： | 魏昭荣,朱兴华,杨维清,杨定宇,蔡青,刘俊.利用多晶硅生产废物制备偏硅酸钠[J].化工环保,2009,29(4). |
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| 作者姓名： | 魏昭荣 朱兴华 杨维清 杨定宇 蔡青 刘俊 |
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| 作者单位： | 成都信息工程学院光电技术学院,四川成都,610225 |
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| 摘 要： | 利用多晶硅生产废物制备偏硅酸钠.将多晶硅生产废物水解生成偏硅酸沉淀,水解温度应控制在40℃以下,水与多晶硅生产废物质量比10～12为宜,溶液pH应控制在2.0～2.5.向偏硅酸中加入质量分数为45%的NaOH溶液制备偏硅酸钠,pH控制在12.5,降温速率控制在1.0℃/min.采用该方法制备的偏硅酸钠完全符合HG/T2568-94<工业偏硅酸钠化工行业标准>的优等品指标.
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| 关 键 词： | 多晶硅 固体废物 偏硅酸钠 水解 综合利用 |
Preparation of Sodium Metasilicate from Polysilicon Production Waste |
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| Wei Zhaorong,Zhu Xinghua,Yang Weiqing,Yang Dingyu,Cai Qing,Liu Jun.Preparation of Sodium Metasilicate from Polysilicon Production Waste[J].Environmental Protection of Chemical Industry,2009,29(4). |
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| Authors: | Wei Zhaorong Zhu Xinghua Yang Weiqing Yang Dingyu Cai Qing Liu Jun |
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| Abstract: | Sodium metasilicate was prepared from polysilicon production waste. Under the conditions of hydrolyzation temperature below 40 ℃, mass ratio of water to waste 10 - 12, and solution pH 2.0-2. 5, the polysilicon production waste is hydrolyzed and the metasilicic acid precipitate is generated. Sodium metasilicate was obtained by adding 45% (mass fraction) NaOH solution into the metasilicic acid with 12. 5 of pH and 1. 0 t/min of temperature drop. The quality of the sodium metasilicate prepared by this process can meet the superior product standard of HG/T2568 -94. |
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| Keywords: | polysilicon solid waste sodium metasilicate hydrolyzation comprehensive utilization |
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