By using methods of acid hydrolysis and isoelectric points deposition, the problems existed in preparation of dithiobisalanine from pig hairs are studied in detail, with the measures to solve them given out in this paper.

• 本文具体分析了由猪毛制取胱氨酸生产中存在的问题,研究了酸水解及等电点沉淀法,给出了解决问题的措施。