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[1]丁一刚1,2,3,等.二氧化硅对湿法磷酸中液相氟的脱除[J].武汉工程大学学报,2015,37(06):5-9.[doi:10. 3969/j. issn. 1674-2869. 2015. 06. 002]
 ,,et al.Effect of silica on defluorination of wet process phosphoric acid[J].Journal of Wuhan Institute of Technology,2015,37(06):5-9.[doi:10. 3969/j. issn. 1674-2869. 2015. 06. 002]
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二氧化硅对湿法磷酸中液相氟的脱除(/HTML)
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《武汉工程大学学报》[ISSN:1674-2869/CN:42-1779/TQ]

卷:
37
期数:
2015年06期
页码:
5-9
栏目:
化学与化学工程
出版日期:
2015-06-30

文章信息/Info

Title:
Effect of silica on defluorination of wet process phosphoric acid
文章编号:
1674-2869(2015)06-0005-05
作者:
丁一刚1张 奇1龙秉文1邓伏礼1居 丽4余 莹4
1.武汉工程大学化工与制药学院,湖北 武汉 430074;2.绿色化工过程教育部重点实验室(武汉工程大学),湖北 武汉 430074;3.新型反应器与绿色化学工艺重点实验室(武汉工程大学),湖北 武汉430074;4.湖北祥云(集团)化工股份有限公司,湖北 武汉435405
Author(s):
DING Yi-gang1 ZHANG Qi1 LONG Bing-wen1 DENG Fu-li1 JU Li4 YU Ying4
1. School of Chemical Engineering & Pharmacy, Wuhan Institute of Technology, Wuhan 430074,China; 2. Key Laboratory of Green Chemical Process (Wuhan Institute of Technology) ,Ministry of Education, Wuhan 430074, China;3. Hubei Key Laboratory of Novel Chemical Reactor & Green Chemical Technology (Wuhan Institute of Technology),Wuhan 430074,China;4.Hubei Xiangyun(Group)Chemical Co.,Ltd., Wuxue 435405, China
关键词:
湿法磷酸脱氟氟硅酸钾二氧化硅
Keywords:
wet- process phosphoric acid defluorination potassium hexafluorosilicate silica
分类号:
TD985
DOI:
10. 3969/j. issn. 1674-2869. 2015. 06. 002
文献标志码:
A
摘要:
为充分回收利用湿法磷酸液相中的氟资源,以硫酸钾为脱氟剂,采用氟硅酸钾沉淀法回收利用湿法磷酸液相中的氟. 首先比较了Ⅰ、Ⅱ、Ⅲ、Ⅳ型四种不同二氧化硅的脱氟性能,Ⅰ、Ⅱ型二氧化硅脱氟效果较差,Ⅲ、Ⅳ型二氧化硅活性较好,能有效提高脱氟率. 然后实验采用Ⅳ型二氧化硅,研究二氧化硅和硫酸钾用量对反应的脱氟率、氟硅酸钾收率及反应选择性的影响,结果表明具有活性的二氧化硅具有良好的脱氟效果;二氧化硅和硫酸钾用量会显著影响反应的脱氟率和选择性,二氧化硅与氢氟酸的反应属于连串反应,反应先生成四氟化硅,然后生成氟硅酸.在二氧化硅和硫酸钾用量足够的情况下,氢氟酸几乎可以完全转化成氟硅酸钾沉淀,脱氟率可达79.59%.
Abstract:
To recover the fluorine effectively in the aqueous phase of wet-process phosphoric acid, the potassium sulfate was used as defluorination agent to transform the fluoride into potassium fluosilicate by the precipitation method. Firstly, by comparing the defluorination performance of four kinds of silicas, labeled as I, II,III and IV, the defluorination efficiency of I and II silica was poor, while III and IV had better activity and improved the defluorination performance effectively. Secondly, IV was chosen to study the effect of the dosage of silica and potassium sulfate on the defluorination efficiency, the yield of potassium fluorosilicate and the reaction selectivity. The results display that the activated silica obtains better defluorination efficiency, the dosage of silica and potassium sulfate clearly affects the defluorination efficiency and the selectivity, and the reaction between silica and hydrofluoric acid belongs to the consecutive reaction, in which tetrafluoride firstly forms and successively changes into hydrofluorosilicic acid. In the case of sufficient silica and potassium sulfate, the hydrofluoric acid is nearly transformed into potassium hexafluorosilicate and its defluorination efficiency reaches 79.59%.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2015-05-22基金项目:国家科技支撑计划(2013BAB07B02)作者简介:丁一刚(1963-),男,湖北黄冈人,教授,博士,博士研究生导师.研究方向:化学工程与技术.
更新日期/Last Update: 2015-09-11