摘要
采用反溶剂重结晶法进行了碳酸氢钾微粉化实验研究,通过正交实验确定了影响粉体粒径的因素,如溶液初始浓度、搅拌转速和溶剂反溶剂体积比,对优选条件进行了验证,并采用XRD和激光粒度分析仪对粒子的晶相及粒度分布进行了表征。实验结果表明,当碳酸氢钾水溶液初始质量浓度为100 g/L,搅拌转速为700 r/min,溶剂反溶剂体积比为1∶10时,可制备出平均粒径为491.9 nm且粒度分布较窄的碳酸氢钾超细粉体。
Ultrafine potassium bicarbonate powder is prepared by anti-solvent recrystallization. The effects of the initial solution concentration, stirring speed and solution/ anti-solvent ratio on the particle size of uhrafine potassium bicarbonate are investigated by orthogonal test. The submicron potassium bicarbonate powder prepared is characterized by X-ray diffraction （XRD） and laser diffraction-based particle size analyzer. The resuhs show that the optimum conditions are 100 g/L of initial solution concentration of potassium bicarbonate ,700 r/min of stirring speed and 1：10 of solvent/ anti-solvent （volume ratio）. Under these conditions, uhrafine potassium bicarbonate particles with a mean particle size of 491.9 nm and narrow particle size distribution can be precipitated.
出处
《现代化工》
CAS
CSCD
北大核心
2012年第4期73-75,77,共4页
Modern Chemical Industry
基金
中央高校基本科研业务费专项资金资助项目(09CX04046A)
国家自然科学基金资助项目(51006122)
关键词
碳酸氢钾
反溶剂重结晶
超细粉体
正交试验
potassium bicarbonate
anti-solvent recrystallization
uhrafine powder
orthogonal test
