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利用磷酸三丁酯在硫酸-磷酸体系中萃取净化低浓度湿法磷酸工艺的研究
Study on purification of low concentration WPA by TBP in the sulfuric acid-phosphoric acid system
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| Site：http://www.lfyff.com Time：2009-12-4 8:57:39 By：全国磷复肥信息网 |
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关键词
湿法磷酸,磷酸三丁酯(TBP),硫酸-磷酸体系,净化
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摘 要
研究了利用磷酸三丁酯在硫酸-磷酸体系中萃取净化低浓度湿法磷酸工艺, 获得了萃取性能较好的萃取体系｡ 实验表明, 稀释剂(煤油)添加量为磷酸三丁酯与稀释剂总质量的10%时, 萃取净化较佳工艺条件为: 萃取相比4,萃取温度40 ℃,搅拌时间15 min, 硫酸添加量为原料湿法磷酸的1%, SO42-去除率 ～80%, Fe､ Al去除率99%以上, P2O5损失率约60%, 所得净化稀磷酸P2O5 7.5%, 可作为热法磷酸吸收剂｡
[中图分类号]TQ126.3+5 [文献标识码]A [文章编号] 1007 - 6220(2009)05 - 0011 – 03
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| 郭昌明,黎铉海,钱军平,冯秋平 |
| (广西大学 化学化工学院,广西 南宁 530004) |
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Keywords
wet-process phosphoric acid (WPA), tributyl phosphate (TBP), the sulfuric acid-phosphoric acid system, purification
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Abstract
The purification of low concentration WPA by TBP in the sulfuric acid-phosphoric acid system is studied,and the extraction system with better extraction properties is obtained.The results show:with the diluent(kerosene)addition amount on 10% of TBP and diluent,extraction phase ratio of 4,temperature of 40 ℃,mixing time of 15min,the sulfuric acid recruitment of 1% (mass fraction of material WPA), SO42- removal rate of about 80%, and the Fe, Al removal rates of above 99%,the P2O5 loss rate of about 60%, dilute phosphoric acid of 7.5% P2O5 can be used as the absorbent for thermal-process phosphoric acid(TPA).
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| GUO Chang-ming, LI Xuan-hai, QIAN Jun-ping, FENG Qiu-ping |
| (School of Chemistry and Chemical Engineering, Guangxi University, Nanning, Guangxi 530004, China) |
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