| 湿法磷酸生产精细磷酸一铵结晶改善剂研究 |
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| 引用本文： | 党亚固,费德君,林晶.湿法磷酸生产精细磷酸一铵结晶改善剂研究[J].无机盐工业,2010,42(4). |
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| 作者姓名： | 党亚固 费德君 林晶 |
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| 作者单位： | 四川大学化工学院,四川成都,610065 |
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| 基金项目： | 国家十一五攻关项目:西部中低品位磷矿资源化深度开发关键技术研究 |
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| 摘 要： | 研究了氨中和法净化湿法磷酸的效果,筛选出了适宜的结晶改善剂。研究结果表明:在中和终点pH为4.0时,铝离子、铁离子、氟离子的净化率均达到98%以上,镁离子的净化率为50%,生成的磷酸一铵结晶细小,呈针状。氟离子作为结晶改善剂,能明显消除铝离子对于结晶的影响,但对于铁离子的效果不明显;螯合结晶改善剂Chet-a可以基本消除铁离子的影响。采用氟离子和Chet-a联合作用,可以基本消除杂质对结晶的影响,改善晶形,产品磷酸一铵长径比达3.5:1,可以生产出合格的产品。
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| 关 键 词： | 磷酸一铵 结晶晶形 杂质 结晶改善剂 |
Research on crystal modifier of fine monoammonium phosphate made from WPA |
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| Dang Yagu,Fei Dejun,Lin Jing.Research on crystal modifier of fine monoammonium phosphate made from WPA[J].Inorganic Chemicals Industry,2010,42(4). |
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| Authors: | Dang Yagu Fei Dejun Lin Jing |
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| Affiliation: | Dang Yagu,Fei Dejun,Lin Jing(School of Chemical Engineering,Sichuan University,Chengdu 610065,China) |
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| Abstract: | Purification effect of phosphoric acid by wet process (WPA) by means of ammonium-neutralization method was studied and appropriate crystal modifiers were selected by sifting.Study results showed that the purification rate of Al,Fe,and F ions were all over 98%,while purification rate of Mg ions was only 50% at the final neutralization point (pH=4.0);and the produced monoammonium phosphate(MAP)was small and fine needle-like crystals.As the crystal modifier,F ion could obviously decrease the influence of Al io... |
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| Keywords: | monoammonium phosphate(MAP) crystal morphology impurity crystal modifier |
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