【摘要】 采用碱土金属化合物作退鞣剂，通过控制温度、酸度等方法使皮革分子的化学键断裂。产生水溶性胶原蛋白，并除去皮革中的有害Ｃｒ（３＋）离子。用本法制取的蛋白质为浅黄色粉未，溶于水，含纯蛋白质８５％以上，蛋白消化率大于９５％。产品中有害Ｃｒ（３＋）离子含量低于２０ｐｐｍ。更多还原

【Abstract】 This paper deals with the preparation of soluble protein by using the waste tannage as a starting material.Hydroxide of alkaline earth metals is used to treat the waste tannage under suitable hydrolytic temperature and solution acidity. The yield of product is greater than 50% and it is a kind of yellowish powder which can be dissolved in water. Its content of protein is more than 85%. The content of digestible protein is over 90%. The product contains lower than 20ppm of Cr￣(3+) and is a good food addtive.更多还原