Graduate School of the Chinese Academy of Sciences, Beijing 100080, China;
Laboratory of Separation Science and Engineering, State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, P. O. Box 353, Beijing 100080, China;
Graduate School of the Chinese Academy of Sciences, Beijing 100080, China;
Graduate School of the Chinese Academy of Sciences, Beijing 100080, China;
Laboratory of Separation Science and Engineering, State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, P. O. Box 353, Beijing 100080, China;
three-liquid-phase extraction system; block copolymer; phenoxymethyl penicillin; recovery;