大孔吸附树脂对发酵液中2-苯乙醇的吸附研究

Research on the Extraction of 2-Phenylethanol in Fermented Broth by Macroporous Adsorption Resin

从5种树脂中筛选出一种吸附量大的树脂HZ816。研究了HZ816树脂影响吸附及解吸的因素,得出结论如下:HZ816树脂对2-苯乙醇平衡吸附量为151.3 mg/g,最佳吸附pH值为5.1,吸附为快速平衡过程,1.5 h内即达到吸附平衡。通过静态平衡实验及等温线方程,得出HZ816树脂符合Freundlich方程。在不同温度下,HZ816树脂随温度的升高对2-苯乙醇的吸附量下降,表明它对2-苯乙醇的吸附是一个放热过程。最佳洗脱剂为无水乙醇,3倍树脂床体积的洗脱液可基本上将2-苯乙醇从树脂上洗脱下来,而且洗脱峰集中,无明显拖尾现象。

In this manuscript,the authors chose HZ816 as research model to study the factors which affect the adsorption and desorption capacity.A series of results were achieved by the single factor experiments： the equilibrium 2-phenylethanol adsorption amount of HZ816 is 151.3 mg/g;the adsorption pH value 5.1;to the adsorption balance time 1.5 h.According to the static balance experiment and isotherm equation,it was found that the behavior of HZ816 obeys to Freundlich equation.Meanwhile,the adsorption of 2-phenylethanol is an exothermic process due to the fact that the 2-phenylethanol adsorption amount of HZ816 decreases with the increasing of temperature.The optimum eluent solvent is absolute ethanol.2-phenylethanol can be desorbed completely by eluent solvent of 3 times bed volume,and the eluting peaks are centralized and no obvious trailing phenomenon was detected.