| 氟硅酸制备高质量纳米白炭黑及F-溶液研究 |
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| 引用本文： | 武莉莉,李至秦,李保山. 氟硅酸制备高质量纳米白炭黑及F-溶液研究[J]. 无机盐工业, 2014, 46(11): 51-54 |
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| 作者姓名： | 武莉莉 李至秦 李保山 |
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| 作者单位： | 北京化工大学化工资源有效利用国家重点实验室，北京 100029 |
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| 摘 要： | 以氟硅酸为硅源、氨水为氨解剂，制备合成了高质量的纳米白炭黑及高浓度氟离子溶液。考察了反应温度、加料方式、陈化时间及洗涤条件等因素对合成白炭黑性能的影响。确定了最佳工艺条件：在40 ℃下，分8次向氟硅酸中快速倾入氨解所需的氨水，直至体系的pH为8~9，陈化1 h，抽滤、水洗后再用少量乙醇润洗，抽滤、放置挥发后再在110 ℃下干燥2 h。所得白炭黑的粒度为89 nm 和322 nm，二氧化硅质量分数大于93%，比表面积大于200 m2/g。所得溶液中氟离子的质量浓度可达90 g/L以上，有利于综合利用。
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| 关 键 词： | 氟硅酸 氨水 纳米白炭黑 |
Synthesis of high-quality nano-silicon dioxide by fluosilicic acid and research on F- solution |
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| Wu Lili;Li Zhiqin;Li Baoshan. Synthesis of high-quality nano-silicon dioxide by fluosilicic acid and research on F- solution[J]. Inorganic Chemicals Industry, 2014, 46(11): 51-54 |
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| Authors: | Wu Lili Li Zhiqin Li Baoshan |
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| Affiliation: | State Key Laboratory of Effective Utilization of Chemical Resources，Beijing University of Chemical Engineering，Beijing 100029，China |
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| Abstract: | Fluosilicic acid as silica source and ammonium hydroxide as ammonia solution agent were used to synthesize high-quality nano-silicon dioxide and high content F- solution.The influence factor，such as the reaction temperature，feedingmethods，aging time，and washing condition，on the preparation of silica dioxide was investigated.The optimum conditions for the synthesis of high-quality silicon dioxide were confirmed as follow：adding ammonia by 8 times to the product until the pH was at 8~9 at 40 ℃；the product was aged for 1 h，rinsed with a little alcohol after washed with water，and dried at 110 ℃ for 2 h after extraction, stewing, and volatilization.The nano-silicon dioxide with its mass fraction more than 93%，particle sizes of 89 nm and 322 nm，and the specific surface area is greater than 200 m2/g was obtained.The mass concentration of F- in solution was more than 90 g/L，and it′s benefit for comprehensive utilization. |
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| Keywords: | fluosilicic acid ammonium hydroxide nano-silicon dioxide |
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