化工进展2017，Vol.36Issue(10)：3590-3595,6.DOI:10.16085/j.issn.1000-6613.2017-0260
反应结晶制备工业级磷酸二氢钾过程的粒度控制
Size control for the reactive crystallization of potassium dihydrogen
摘要
Abstract
Potassium dihydrogen phosphate (KH2PO4) was prepared by reactive crystallization of ammonium phosphate (MAP) and potassium hydroxide (KOH),which was promising for industrialization due to low cost.It was experimentally proved that the crystal size of final KH2PO4 product was mainly determined in the reaction stage.Therefore,the effect of reaction time,stirring speed,feed concentration,and feeding time on the crystal size distribution of KH2PO4,was studied and the reaction crystallization mechanism was discussed.Proper reaction crystallization conditions were proposed as:MAP and KOH solution mass percentage of 50％,KOH feeding time of 30min,reaction time of 3h,and stirring speed of 300r/min.Under those conditions,the median size of KH2PO4 product was 1070μm with fairly uniform distribution and regular tetragonal crystal morphology.关键词
磷酸二氢钾/反应结晶/粒度分布/过程Key words
potassium dihydrogen phosphate/reaction crystallization/crystal size distribution/process分类
化学化工引用本文复制引用
丁一刚,韩永红,骆万智,龙秉文,余莹,居丽..反应结晶制备工业级磷酸二氢钾过程的粒度控制[J].化工进展,2017,36(10):3590-3595,6.基金项目
湖北省科技支撑计划(2015BCB248)及湖北省重大科技创新计划(2016ACA179)项目. （2015BCB248）
