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从茶中分离制取天然抗氧化剂茶多酚，现行工业化生产多采用有机溶剂萃取和金属盐沉淀法，这两种方法，工艺繁琐，有机溶剂、金属盐或酸、碱损耗大，严重污染环境，提取率低、得率低、成本高、销售困难。笔者采用大孔吸附树脂层析法从茶中分离，纯化茶多酚，制得低含咖啡碱的茶多酚粗制品，得率为１８％～２１％，纯度≥７０％，ＥＧＣＧ＞２０％，咖啡碱＜２％。吸附树脂具有表面积大，吸附量大，吸附与洗脱高峰集中，不用或少用除乙醇外的有机溶剂，洗脱与再生容易，成本低，得率高等优点，大有开发前景。
From the tea isolated from the natural antioxidant tea polyphenols, the current industrial production and more use of organic solvent extraction and metal salt precipitation, these two methods, complicated process, organic solvents, metal salts or acid, alkali loss, serious environmental pollution , Low extraction rate, low yield, high cost and difficult sales. The author used macroporous resin chromatography to isolate and purify tea polyphenols, and obtained crude tea polyphenols with low caffeine content of 18% -21%, purity ≥70%, EGCG> 20% Caffeine <2%. Adsorption resin has the advantages of large surface area, large adsorption capacity, peak concentration of adsorption and elution, no or little use of organic solvents other than ethanol, easy elution and regeneration, low cost and high yield, and has great development prospect.