磷酸氢钙制备磷酸二氢钾的工艺研究Ⅰ

无机盐工业 ›› 2011, Vol. 43 ›› Issue (7): 48-.

磷酸氢钙制备磷酸二氢钾的工艺研究Ⅰ

李春丽¹，张志强¹，关云山¹，邢英¹，王娟¹，张英智¹，何全胜²

1.青海大学化工学院，青海西宁 810016; 2.青海明胶股份有限公司

出版日期:2011-07-10 发布日期:2011-07-11

Study on preparation of potassium dihydrogen phosphate with calcium hydrogen phosphate Ⅰ

Li Chunli¹,Zhang Zhiqiang¹,Guan Yunshan¹,Xing Ying¹,Wang Juan¹,Zhang Yingzhi¹,He Quansheng²

1.School of Chemical Engineering，Qinghai University，Xining 810016，China;2.Qinghai Gelatin Corporation Limited

Published:2011-07-10 Online:2011-07-11

摘要/Abstract

摘要： 以明胶生产中副产的磷酸氢钙和工业级硫酸钾为原料，采用复分解法制取了磷酸二氢钾。通过单因素实验考察了反应时间、反应温度、液固体积质量比及钾磷物质的量比等因素对制备磷酸二氢钾过程中的磷收率和钾收率的影响。实验结果表明较佳的工艺条件：反应时间为120 min，反应温度为60 ℃，液固体积质量比为4 mL/g，钾磷物质的量比为1.3。通过正交试验优化了工艺条件，实验结果表明最优的条件：反应时间为130 min，反应温度为50 ℃，液固体积质量比为4.5 mL/g，钾磷物质的量比为1.3，在此条件下磷的收率可达到81.15%，钾的收率可达到97.89%。

关键词: , 磷酸氢钙, 硫酸钾, 磷酸二氢钾

Abstract: By using the by-product calcium hydrogen phosphate from the production of gelatin and industrial grade potassium sulfate as raw materials,potassium dihydrogen phosphate was prepared by double decomposition method.With single factor experiment,the effects of reaction time,reaction temperature,volume/mass ratio of liquid to solid,and amount-of-substance ratio of phosphorus to potassium on phosphorus and potassium yields in the process of preparing potassium dihydrogen phosphate were investigated.Experiment results showed better process conditions were as follows:reaction time was 120 min,reaction temperature was 60 ℃,volume/mass ratio of liquid to solid was 4 mL/g,and amount-of-substance ratio of potassium to phosphorus was 1.3.Process conditions were optimized through orthogonal experiment,and the experimental results showed the optimal reaction conditions were as follows:reaction time was 130 min,reaction temperature was 50 ℃,volume/mass ratio of liquid to solid was 4.5 mL/g,and amount-of-substance ratio of potassium to phosphorus was 1.3.Yields of phosphorus and potassium could reach 81.15% and 97.89% respectively under those conditions.

Key words: calcium hydrogen phosphate, potassium sulfate, potassium dihydrogen phosphate

中图分类号:

TQ126.35

李春丽, 张志强, 关云山, 邢英, 王娟, 张英智, 何全胜. 磷酸氢钙制备磷酸二氢钾的工艺研究Ⅰ[J]. 无机盐工业, 2011, 43(7): 48-.

LI Chun-Li, ZHANG Zhi-Qiang, GUAN Yun-Shan, XING Ying, WANG Juan, ZHANG Ying-Zhi, HE Quan-Sheng. Study on preparation of potassium dihydrogen phosphate with calcium hydrogen phosphate Ⅰ[J]. INORGANICCHEMICALSINDUSTRY, 2011, 43(7): 48-.

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磷酸氢钙制备磷酸二氢钾的工艺研究Ⅰ

Study on preparation of potassium dihydrogen phosphate with calcium hydrogen phosphate Ⅰ

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磷酸氢钙制备磷酸二氢钾的工艺研究Ⅰ

Study on preparation of potassium dihydrogen phosphate with calcium hydrogen phosphate Ⅰ

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