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吉林化工学院学报, 2024, 41(5): 7-11     https://doi.org/10.16039/j.cnki.cn22-1249.2024.05.002
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pH对磷酸铵镁(MAP)晶体生成的影响研究
唐滨,张云辉,郝俊凯,高越,翦英红
吉林化工学院 资源与环境工程学院,吉林 吉林 132022
TANG Bing, ZHANG Yunhui, HAO Junkai, GAO Yue,JIAN Yinghong
TANG Bing, ZHANG Yunhui, HAO Junkai, GAO Yue,JIAN Yinghong
School of Resource and Environment, Jilin Institute of Chemistry and Technology, Jilin City 132022,China
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摘要 在MAP生成过程中,溶液的pH的影响和变化都十分明显,本文重点研究了pH对MAP生成过程、产量及晶型的影响。pH8~11范围内,随着MAP晶体的形成,溶液的pH急剧下降,加药8min后迅速降低至7左右。但是当pH增加到12后,溶液的pH变化变缓,但沉淀物中杂质成分明显增加,基本不再生成MAP晶体。MAP产量影响实验表明:pH10为最佳MAP生成条件,此时晶体产量高达2.52g,且沉淀物中杂质成分很少,主要为磷酸铵镁晶体。沉淀物的SEM和XRD谱图分析显示:pH不同,沉淀物的成分是不一样的。pH8~10条件下,主要为磷酸铵镁。pH11~12时,沉淀物成分较为复杂,主要为磷酸镁、氢氧化镁、磷酸铵镁的混合物。研究结果表明:在磷酸铵镁晶体的形成过程中,溶液pH的影响十分显著。
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唐滨
张云辉
郝俊凯
高越
翦英红
关键词:  磷酸铵镁(MAP)  pH  生成过程  产量  晶型    
Abstract: In the process of MAP formation, the influence and change of pH of solution were very obvious,and then, the effects of pH on MAP production, yield and crystal type were studied. In the range of pH8~11, with the formation of MAP crystals, the pH of the solution dropped sharply, and quickly dropped to about 7 after 8min of addition. However, when the pH increased to 12, the pH of the solution changed slowly, but the impurities in the precipitate increased significantly, and basically no MAP crystal was formed. The results of yield experiment show that pH10 was the best condition for MAP production, which yield was high to 2.52g, and the impurities in the precipitate are few, the component was mainly magnesium ammonium phosphate. The SEM and XRD analyses showed that the composition of the precipitate were different with pH. It was mainly magnesium ammonium phosphate at pH8~10, however, the compositions of the precipitates were more complex at pH11~12, which were mainly the mixture of magnesium phosphate, magnesium hydroxide and ammonium magnesium phosphate. These results showed that the pH of solution has a significant effect on the formation of magnesium ammonium phosphate crystals.
Key words:  magnesium ammonium phosphate (MAP)    pH    production    yield    crystal type
               出版日期:  2024-05-25      发布日期:  2024-05-25      整期出版日期:  2024-05-25
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引用本文:    
唐滨, 张云辉, 郝俊凯, 高越, 翦英红. pH对磷酸铵镁(MAP)晶体生成的影响研究[J]. 吉林化工学院学报, 2024, 41(5): 7-11.
TANG Bing, ZHANG Yunhui, HAO Junkai, GAO Yue, JIAN Yinghong. TANG Bing, ZHANG Yunhui, HAO Junkai, GAO Yue,JIAN Yinghong. Journal of Jilin Institute of Chemical Technology, 2024, 41(5): 7-11.
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https://xuebao.jlict.edu.cn/CN/10.16039/j.cnki.cn22-1249.2024.05.002  或          https://xuebao.jlict.edu.cn/CN/Y2024/V41/I5/7
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