| 液晶屏抛光废液的资源化利用 |
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| 引用本文： | 姜贵清,童张法,陈志传,高大明.液晶屏抛光废液的资源化利用[J].化工环保,2013,33(2):154-157. |
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| 作者姓名： | 姜贵清 童张法 陈志传 高大明 |
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| 作者单位： | 1.广西大学，化学化工学院，广西?南宁，530004;
2.深圳市危险废物处理站有限公司，广东，深圳?518049 |
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| 摘 要： | 以液晶屏抛光废液为原料制备冰晶石，首先加入碳酸钠，反应生成氟硅酸钠沉淀，去除废液中的氟硅酸根;再向滤液中加入NaOH和NaAlO2混合溶液，反应生成冰晶石。最佳工艺条件为:碳酸钠加入量为理论加入量的2.2倍，冰晶石制备反应温度为80℃，反应原料中n(HF)∶n(NaAlO2)为5.4、n(Na)∶n(Al)为3.4、NaOH和NaAlO2质量分数为20%。在最佳条件下制得的冰晶石产品中n(Na)∶n(Al)为2.84，达到GB/T4291-2007《冰晶石》中牌号CH-1的质量标准。采用该工艺可实现液晶屏抛光废液的资源化综合利用。
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| 关 键 词： | 液晶屏抛光液 氟硅酸钠 冰晶石 锥冰晶石 综合利用 |
| 收稿时间： | 2013-06-25 |
Reutilization of Waste LCD Screen Polishing Liquor |
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| Jiang Guiqing
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Tong Zhangfa
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Chen Zhichuan
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Gao Daming.Reutilization of Waste LCD Screen Polishing Liquor[J].Environmental Protection of Chemical Industry,2013,33(2):154-157. |
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| Authors: | Jiang Guiqing Tong Zhangfa Chen Zhichuan Gao Daming |
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| Institution: | 1. College of Chemistry and Chemical Engineering,Guangxi University,Nanning Guangxi 530004,China;
2. Shenzhen Hazardous Waste Treatment Station Company Limited,Shenzhen Guangdong 518049,China |
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| Abstract: | Cryolite was prepared using waste LCD screen polishing liquor as raw material. First,sodium carbonate was added into the liquor and the generated sodium fluorosilicate precipitate was removed by filtration;Then,NaOH and NaAlO2 mixed solution was added into the filtrate to generate cryolite. The optimum process conditions are as follows: sodium carbonate dosage 2.2 times larger than theoretical value,reaction temperature for cryolite preparation 80 ℃,n(HF);n(NaAlO2)=5.4,n(Na);n(Al)=3.4,mass fraction of NaOH and NaAlO2 20%. Under these conditions,n(Na);n(Al) of the prepared cryolite is 2.84,which can meet the quality standards of GB/T4291-2007 for CH-1. The reutilization of waste LCD screen polishing liquor can be realized with the process. |
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| Keywords: | LCD screen polishing liquor sodium fluorosilicate cryolite chiolite comprehensive utilization |
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