溶剂萃取法净化萃余酸制磷酸二氢钾  

Preparation of potassium dihydrogen phosphate with raffinate from phosphoric acid purification by extraction method

作　　者：尤彩霞[1] 杨政发 王贵珍[1] 周骏宏[2] 孙娜[1] 

机构地区：[1]河北化工医药职业技术学院化学与环境工程系,河北石家庄050026 [2]黔南民族师范学院化学与化工系

出　　处：《无机盐工业》2014年第1期56-58,共3页Inorganic Chemicals Industry

摘　　要：研究了以氯化钾和湿法磷酸净化后的萃余酸为原料,利用正丁醇为萃取剂回收萃余酸中湿法磷酸制备磷酸二氢钾的新方法。研究了正丁醇含水量、萃取时间、萃取温度及萃余酸用量等因素对产品产量的影响,确定了适宜的工艺条件。实验结果表明,优化的工艺条件为:m(萃余酸)∶V(正丁醇)为127.4 g/L、m(水)∶V(正丁醇)为95 g/L、温度为30℃、萃取时间为60 min、m(氯化钾)∶V(正丁醇)为26.075 g/L。本研究提供了一种回收利用萃余酸的经济、简单的方法。A new method for preparation of potassium dihydrogen phosphate from potassium chloride and the raffinate from phosphoric acid purification by extraction method with butyl alcohol as extractant was studied.The influences of the butyl al- cohol＇s water content, extraction time, extraction temperature, and amounts of the raffinate on product quality were investigat- ed and the optimum conditions were confirmed as follows： 127.4 g raffinate was contained per 1 L butyl alcohol ,95 g water was contained per 1 L butyl alcohol,the extraction time was 60 rain,the extraction temperature was 30 ℃ ,and 26.075 g potassium chloride was used per 1 L butyl alcohol.The advantages of the method were economical and simple in operation.

关 键 词：磷酸二氢钾 正丁醇 萃取法 萃余酸 

分 类 号：TQ131.13[化学工程—无机化工]