纳海莺, 蒋丽红, 陈雪萍. 化学沉淀-溶剂沉淀法脱除湿法磷酸中氟的研究[J]. 云南大学学报(自然科学版), 2010, 32(1): 68-72 .
引用本文: 纳海莺, 蒋丽红, 陈雪萍. 化学沉淀-溶剂沉淀法脱除湿法磷酸中氟的研究[J]. 云南大学学报(自然科学版), 2010, 32(1): 68-72 .
NA Hai-ying, JIANG Li-hong, CHEN Xue-ping. Defluorination of wet-process phosphoric acid with chemical precipitation-solvent precipitation[J]. Journal of Yunnan University: Natural Sciences Edition, 2010, 32(1): 68-72 .
Citation: NA Hai-ying, JIANG Li-hong, CHEN Xue-ping. Defluorination of wet-process phosphoric acid with chemical precipitation-solvent precipitation[J]. Journal of Yunnan University: Natural Sciences Edition, 2010, 32(1): 68-72 .

化学沉淀-溶剂沉淀法脱除湿法磷酸中氟的研究

Defluorination of wet-process phosphoric acid with chemical precipitation-solvent precipitation

  • 摘要: 以乙醇为溶剂,RNH2为沉淀剂,采用化学沉淀-溶剂沉淀法对湿法磷酸进行净化,在乙醇与预处理酸体积比为2.0、溶剂沉淀剂用量为3.5%、反应温度40℃、反应时间100min条件下,脱氟率可达到96%以上,磷收率为86%以上.

     

    Abstract: The purification of wet-process phosphoric acid was researched with chemical precipitation-solvent precipitation with ethanol as solvent and RNH2 as precipitator.The optimized process parameters were obtained:the volume ratio of ethanol to pretreatment acid 2: 1,solvent precipitator 3.5% (w),reaction temperature 40 ℃,reaction time 100 min.Under the condition,the ratio of defluorination was up to 96% and the yield of phosphorus was up to 86%.

     

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