摘要
采用层式熔融结晶技术对麝香DDHI进行分离提纯,随着结晶时间的延长,结晶层厚度增加,晶体层纯度增大,结晶2h后,纯度变化缓慢,固液两相趋于平衡。随着结晶管内温度提高,晶体纯度也越高,而晶体层厚度变薄,在98.5℃时,纯度可达99.5 %。管外熔融液温度对结晶过程的影响不大。通过实验数据回归出了结晶过程的操作平衡方程:结晶平衡线Xcc=exp[(Tc+175 3.8) / 4 0 2 .6 8],母液平衡线Xm=exp[(Tc+6 90 .0 ) / 172 .2 ]。回归数据与实验结果误差较小,可用于工程设计。
With increasing crystallization time, the thickness and purification of crystallization layer was increased. When the crystallization time reached to 2 hours, the change of purification became slower, the phase With increasing crystallization time, the thickness and purification of crystallization layer was increased. When the crystallization time reached to 2 hours, the change of purification became slower, the phase of solid and liquid tended to equilibrium. With the crystallization tube temperature increasing, the purification of crystallization was increased and the crystallization layers became thin. When the temperature was 98.5°C, the purification was 99.5%. The temperature of melt liquid of outside tube had no great influence on crystallization. The equilibrium equation were established through to experimental data, the equilibrium line of crystallization is: Xcc = exp[(Tc + 1753.8)/402.68], and the mother liquid equilibrium line is: Xm = exp[(Tc + 690.0)/172.2]. A good agreement was found between the predicted and the experimental data. So it can be applied to engineering design.
出处
《石油化工高等学校学报》
EI
CAS
2005年第2期8-10,共3页
Journal of Petrochemical Universities
基金
江苏省自然科学基金资助项目 (BK2 0 0 10 93)。
关键词
层式结晶
麝香DDHI
提纯
回归
Layer melt crystallization
Musk DDHI
Purification
Regressive
