含磺酸、羧酸双功能基树脂对混合氨基酸的分离性能研究

Separation of Amino-Acids by Bifunctional Ion Exchangers Containing Sulfo and Carboxy Groups

对苯乙烯-丙烯腈-二乙烯基苯(S/AN/DVB)交联共聚机理研究曾发现,丙烯腈作为第三单体,可使DVB竞聚率比在S/DVB共聚体系中降低,相互分离显著,从而有利于合成性能较好的离子交换树脂;本文在此基础上,将S/AN/DVB共聚体中的氰基水解成羧基来合成含磺酸、羧酸双功能基树脂,解决了前人研究中仅有50％的氰基水解成羧基的问题,并首次将这种树脂应用于混合氨基酸的分离。

The bifunctional ion exchangers were synthesized with the styrene-acrylonitrile-divinylbenzene copolymers. The effects of the concentration of sulfonic acid, the reaction temperature and the reaction time on the bifunctional ion exchangers were investigated. The use of these resins for separation of amino acids was studied.