| 萃余酸净化制三聚磷酸钠研究 |
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| 引用本文： | 钟雪莲,尤彩霞,李富兰,周骏宏,李康燕,林荣文. 萃余酸净化制三聚磷酸钠研究[J]. 无机盐工业, 2013, 45(3): 28-30 |
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| 作者姓名： | 钟雪莲 尤彩霞 李富兰 周骏宏 李康燕 林荣文 |
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| 作者单位： | 1.黔南民族师范学院化学与化工系，贵州都匀558000；2.河北化工医药职业技术学院 |
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| 摘 要： | 为利用湿法磷酸萃取净化过程产生的副产物萃余酸，对萃余酸净化制三聚磷酸钠进行了探索。实验研究了分步中和净化方法，通过控制反应pH，可以除掉磷酸中绝大部分有害杂质。为提高湿法磷酸中和过程的除杂效果，还尝试在中和过程中加入氨水、氯化铵、草酸铵、氟化铵、氟化钠几种沉淀促进剂。初步实验结果表明，氨水和氟化钠对沉淀析出有显著效果，为最佳沉淀促进剂。
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| 关 键 词： | 湿法磷酸 萃余酸 沉淀剂 净化 磷酸盐 |
Preparation of sodium tripolyphosphate by purification of raffinate |
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| Zhong Xuelian , You Caixia , Li Fulan , Zhou Junhong , Li Kangyan , Lin Rongwen. Preparation of sodium tripolyphosphate by purification of raffinate[J]. Inorganic Chemicals Industry, 2013, 45(3): 28-30 |
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| Authors: | Zhong Xuelian You Caixia Li Fulan Zhou Junhong Li Kangyan Lin Rongwen |
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| Affiliation: | 1.Department of Chemistry and Chemical Engineering, Qiannan Normal College for Nationlities,Duyun 558000,China；2.Hebei Chemical & Pharmaceutical Vocational Technology College |
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| Abstract: | In order to utilize the by-product raffinate，produced in the extraction purification of wet process phosphoric acid， the preparation of sodium tripolyphosphate by purification of raffinate was explored.A fractional neutralization purification method was studied.Through control the pH in the reaction，most of harmful substances could be removed from the phosphoric acid.In order to improve the impurity removing effect during the neutralization process of wet process phosphoric acid，several precipitators，such as ammonia，ammonium chloride，ammonium oxalate，ammonium fluoride，and sodium fluoride，were added.Preliminary experiment results showed ammonia and sodium fluoride had obvious effect for the precipitation. |
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| Keywords: | wet process phosphoric acid raffinate precipitator purification phosphate |
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