【摘要】 通过对苹果及其皮渣进行预处理、水解、脱酯转化、脱色、浓缩、干燥等系列处理工艺，获得高纯度果胶．采用先进的固定化酶反应技术，利用α－ 淀粉酶的催化作用，对所得果胶进行低酯化处理；对水解产品与底物进行超滤分离，最终获得高纯度、低酯化度的Ｄ－ 吡喃半乳糖醛酸．该产品在烟草保润方面具有一定的实用价值更多还原

【Abstract】 After treating with apple slag by pretreatment, hydrolysis,deesterification,decolor,concentration and dry,some highly pure pectin are obtained.By using an immobilized enzyme reactor,this pectin is lowly esterifized with the catalysis of α-amylase.Then ultrafiltering the products with the substrate,the final product——D-pyranyl-galacturonic acid are obtained.This product is valuable for the cigarettes as a humectant.更多还原