MODIFICATION OF X-5 RESIN AND ADSORPTION PROPERTY OF THE MODIFIED RESINS

Three polymeric adsorbents with hydrogen bonding acceptors, methylamine, N-methyl-acetamide and aminotri(hydroxymethyl)methane modified resins are synthesized from chloromethylated X-5 resin. Adsorption isotherms of phenol and theophylline onto the three modified resins and the original X-5 resin from aqueous solution are measured. The results show that adsorption of compounds with hydrogen bonding donor onto methylamine and N-methylacetamide modified resins is enhanced as compared with that onto X-5 resin, and adsorption mechanism between the adsorbents and the adsorbates is mainly based on hydrogen bonding and hydrophobic interaction. While adsorption of compounds with hydrogen bonding donor onto aminotri(hydroxymethyl)methane modified resin is lowered as compared with that onto X-5 resin, and adsorption mechanism between the adsorbent and the adsorbates is mainly based on hydrophobic interaction.

大孔吸附树脂分离富集苜蓿皂甙的研究

本项工作以对苜蓿皂甙的吸附量和解吸率为指标筛选大孔吸附树脂。研究结果表明,X-5吸附树脂具有较好的吸附性能和解吸效果。研究应用正交试验方法进一步对大孔吸附树脂分离纯化苜蓿皂甙的工艺条件进行试验分析,确定苜蓿皂甙分离富集的最佳操作条件为:上样浓度8mg/mL,色谱柱的径高比1∶7,药材-树脂比例1∶3;吸附完全后,先以水洗脱,除去杂质,再以50%乙醇洗脱,可以得到纯度较好的苜蓿皂甙。