| 氟硅酸钠制备白炭黑氨解过程影响因素研究 |
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| 引用本文： | 于欣伟,张霖霖,郑成,赵国鹏. 氟硅酸钠制备白炭黑氨解过程影响因素研究[J]. 化学工程, 2004, 32(4): 67-70 |
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| 作者姓名： | 于欣伟 张霖霖 郑成 赵国鹏 |
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| 作者单位： | 广州大学,生物与化学工程学院,广东,广州,510091;广州市二轻工业科学技术研究所,广东,广州,510170 |
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| 摘 要： | 利用磷肥副产品Na2SiF6为原料,采用氨解法制备白炭黑。Na2SiF6水解反应的机理研究表明pH对水解反应影响很大,是调控白炭黑结构与性能的重要因素;Na2SiF6氨解反应为放热反应,反应初期是调控白炭黑产品结构与性能的关键时期。实验还研究了氨水的加入量、溶液pH、反应温度、氟化钠的加入等因素的影响,该工艺Na2SiF6转化率较高,白炭黑收率可达97%。
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| 关 键 词： | 磷肥副产品 Na2SiF6 氨解法 白炭黑 |
| 文章编号： | 1005-9954(2004)04-0067-04 |
Study on effecting factors of ammoniating process in silica preparation with sodium fluosilicate |
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| YU Xin-wei,ZHANG Lin-lin,ZHENG Cheng,ZHAO Guo-peng. Study on effecting factors of ammoniating process in silica preparation with sodium fluosilicate[J]. Chemical Engineering, 2004, 32(4): 67-70 |
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| Authors: | YU Xin-wei ZHANG Lin-lin ZHENG Cheng ZHAO Guo-peng |
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| Affiliation: | YU Xin-wei~1,ZHANG Lin-lin~1,ZHENG Cheng~1,ZHAO Guo-peng~2 |
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| Abstract: | Silica was prepared by ammoniating with Na_2SiF_6 as a raw material——a by-product in the production of the phosphorous fertilizer. The research about hydrolysis reaction of Na_2SiF_6 shows that the effect of pH is very large on it and pH is important factor deciding silica′s structure and properties. Ammoniating reaction of Na_2SiF_6 is exothermic reaction .The beginning of reaction is key time to determine structure and properties of silica .Same factors such as ammonia liquor consumption,solution pH,reaction temperature,adding sodium fluoride,etc.were studied.The transforming rate of Na_2SiF_6 and recovery rate of silica are all high by this technology. |
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| Keywords: | phosphorous fertilizer by-product Na_2SiF_6 ammoniating silica |
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