明胶钙水制备磷酸二氢钾工艺研究  

Preparation technology of potassium dihydrogen phosphate with calciferous wastewater of gelatin production

作　　者：关云山[1] 张志强[1] 武鑫[1] 李春丽[1] 张英智[1] 白占勇 

机构地区：[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　　处：《无机盐工业》2010年第9期46-48,共3页Inorganic Chemicals Industry

基　　金：科技部科技人员服务企业行动项目(2009GJG20019)

摘　　要：以明胶厂富产钙水和氯化钾为原料,采用复分解法制备磷酸二氢钾。通过单因素实验考察了pH、反应温度、反应时间、液固质量比、钾磷物质的量比等因素对磷收率的影响。结果显示:调节钙水的pH为8.5时,磷的沉淀率最高;控制反应温度为60℃、反应时间为2.5 h、液固质量比为2.5、钾磷物质的量比为1.1时,磷的收率达到90%以上,产品磷酸二氢钾达到农用级标准。Potassium dihydrogen phosphate was prepared by double decomposition reaction with calciferous wastewater in gelatin factory and potassium chloride as raw materials.Influences of reaction parameters,such as pH,reaction temperature,reaction time,liquid-solid mass ratio,and amount-of-substance ratio of potassium to phosphorus on yield of phosphorus were investigated through single factor experiment.Results showed that when pH was 8.5,precipitation rate of phosphorus was the highest;the yield of phosphorus was up to 90% and the quality of potassium dihydrogen phosphate reached agriculture grade standard when reaction temperature was 60 ℃,reaction time was 2.5 h,liquid-solid mass ratio was 2.5,and amount-of-substance ratio of potassium to phosphorus was 1.1.

关 键 词：磷酸二氢钾 明胶钙水 氯化钾 复分解反应 

分 类 号：TQ126.35[化学工程—无机化工]