饲料级磷酸氢钙制备磷酸二氢钾工艺研究  

Preparation of potassium dihydrogen phosphate from feed-grade calcium hydrogen phosphate

作　　者：彭伟 王振杰[1] 刘安荣 晏晔 李威 PENG Wei;WANG Zhenjie;LIU Anrong;YAN Ye;LI Wei(Guizhou Institute of Metallurgy and Chemical Industry,Guiyang 550016,China;Guizhou Light Industry Scientific Research Institute,Guiyang 550016,China;Guizhou Guifu Ecological Fertilizer Co.,Ltd.,Yuping 553012,China)

机构地区：[1]贵州省冶金化工研究所,贵州贵阳550016 [2]贵州省轻工业科学研究所,贵州贵阳550016 [3]贵州省贵福生态肥业有限公司,贵州玉屏553012

出　　处：《磷肥与复肥》2022年第4期20-22,共3页Phosphate & Compound Fertilizer

基　　金：贵州省科技重大专项(黔科合重大专项字[2019]3004)。

摘　　要：研究以饲料级磷酸氢钙为原料制备磷酸二氢钾的工艺,考察各因素对磷收率的影响。研究结果表明,在n(磷酸)/n(磷酸氢钙)为0.4、磷酸氢钙悬浮液液固体积质量比为5 mL/g、n(硫酸氢钾)/n(磷酸氢钙)为1.0、硫酸氢钾加入时间为0.5 h、反应温度为65℃、反应时间为1.5 h的条件下,获得了磷收率为95.78%的良好指标。该方法成本低、收率高,可为工业上湿法磷酸生产磷酸二氢钾提供参考。The preparation of potassium dihydrogen phosphate from feed-grade calcium hydrogen phosphate is studied.The effects of various factors on the yield of phosphorus are investigated.The results show that under the conditions of n(H_(3)PO_(4))/n(CaHPO_(4)) of 0.4,liquid-solid volume mass ratio of calcium hydrogen phosphate suspension of 5 mL/g,n(KHSO_(4))/n(CaHPO_(4)) of 1.0,KHSO;addition time of 0.5 h,reaction temperature o65 ℃ and reaction time of 1.5 h,a good phosphorus yield of 95.78% is obtained.The method achieves the effect of low cost and high yield,providing reference for industrial production of potassium dihydrogen phosphate from wet-process phosphoric acid.

关 键 词：饲料级磷酸氢钙 磷酸二氢钾 湿法磷酸 磷收率 

分 类 号：TQ126.35[化学工程—无机化工]