湿法磷酸副产物氟硅酸制备氟化钾工艺研究  

Study on preparation of potassium fluoride by hydrofluosilicic acid,a by-product of wet process phosphoric acid

作　　者：李泽坤 丁一刚[1] 龙秉文[1] 邓伏礼[1] 柯文昌[1] Li Zekun;Ding Yigang;Long Bingwen;Deng Fuli;Ke Wenchang(Hubei Novel Reactor ＆ Green Chemical Technology Key Laboratory,Key Laboratory for Green Chemical Process of Ministry of Education,School of Chemical Engineering ＆ Pharmacy,Wuhan Institute of Technology,Wuhan 430073,China)

机构地区：[1]武汉工程大学化工与制药学院绿色化工过程教育部重点实验室湖北省新型反应器与绿色化学工艺重点实验室,湖北武汉430073

出　　处：《无机盐工业》2018年第11期45-48,共4页Inorganic Chemicals Industry

摘　　要：为充分回收湿法磷酸加工过程中的氟资源,采用其副产物氟硅酸和氢氧化钾直接制备高品质氟化钾。通过单因素实验考察了反应温度、氟硅酸滴加速度、氢氧化钾相对加入量对产品收率的影响。通过氢氧化钡除杂、氟硅酸反调粗氟化钾pH方法净化除杂。结果表明:在最优化反应条件下和净化除杂后,该法制得的氟化钾收率达到92%以上,纯度达到99%左右,其余各项指标均达到工业品的要求。In order to fully recycle the fluorine resources in the processing of wet process phosphoric acid, high quality potassium fluoride was prepared by using its by-products hydrofluosilicic acid and potassium hydroxide as raw materials.The effects of temperature ,dropping speed of hydrofluosilicic acid and therelatively adding amount of potassium hydroxide on the yield of the product were investigated by single factor experiment.The products were purified by barium hydroxide and by the method of hydrofluosilicic acid adjusting to the pH of crude potassium fluoride.The results showed thatunder the optimum reaction and purification conditions ,the yield of purified potassium fluoride reached above 92% ,the purity reached about 99% ,and the rest of all indicators met the requirements of industrial products.

关 键 词：湿法磷酸 氟硅酸 氟化钾 

分 类 号：TQ131.13[化学工程—无机化工]