目的研究β-环糊精包合小青龙颗粒中混合挥发油的制备工艺。方法采用正交实验设计,以挥发油包合率和收得率的综合评分为评价指标,优选β-环糊精包合小青龙颗粒中挥发油的最佳工艺条件。结果最佳挥发油包合工艺条件为:β-环糊精:挥发油(g:ml)为8:1,包合温度30℃,包合时间120 m in,β-环糊精:水为1:15。结论该工艺挥发油包合率及包合物收率较高,包合效果良好。
Liquid-liquid equilibrium （LLE） data for the ternary system 2-methoxy-2-methylpropane （methyl tert-butyl ether） ＋ p-cresol ＋ water was measured at atmospheric pressure and temperatures of 298.15 K and 313.15 K. From the distribution coefficients and selectivity, it was found that 2-methoxy-2-methylpropane is an efficient solvent to extract p-cresol from wastewater. The consistency of the experimental tie-line data was verified with the Hand and Bachman equations. These data were also correlated with the non-random two liquid （NRTL） and universal quasi-chemical correlation activity coefficient （UN1QUAC） models to yield binary interac- tion parameters for p-cresol extraction process evaluation. Both models agreed with experiments very well, yet the NRTL model showed even smaller average deviation than the UNIQUAC model.
