摘要
针对溶液间歇结晶过程的特点 ,定义并关联了无因次变量K和K ,用于对结晶过程中成核和生长两阶段进行定量识别。对于添加晶种的KNO3 —H2 O间歇结晶过程 ,模拟分析的结果表明 :无因次变量K和K 的数值均随着晶核形成过程而减小 ,随着晶核生长过程而增大。由实验测定的动态透光率和溶液浓度 ,即可对结晶过程中的成核和生长两阶段进行定量识别。
Two new zero dimension variables,K and K *,concerning the stage identification of solution batch crystallization process were defined in this paper.For seeded crystallization of potassium nitrate in water,the results calculated showed the values of K and K * would be decreased with nucleation process and increased with crystal growth process.Based on the characteristics of the variables,coupled with the dynamic transmittance and concentration data,the nucleation and crystal growth stages could be identified.
出处
《化工时刊》
CAS
2004年第3期31-33,共3页
Chemical Industry Times
基金
中国药品大学青年基金
关键词
间歇结晶
硝酸钾
成核阶段
生长阶段
模型识别
制药
batch crystallization potassium nitrate nucleation stage crystal growth stage model identification