In a process of preparing a tea extract, the extract is adjusted to 20-80 c, treated with tannase at pH = 4-7 and then subjected to ultrafiltration at 2-90oC using a membrane with an average molecular weight exclusion point of at least 5000 Daltons.

• 在一个制备茶提取物的工艺中,将茶提取物的温度调节在20-80℃之间, 在ph= 4-7下用丹宁酶处理,然后,用平均分子量至少大于5000道尔顿的滤膜在2-90℃下进行超过滤。