公开(公告)号：US20020016502A1

公开(公告)日：2002-02-07

申请号：US09883218

申请日：2001-06-19

申请人： NIPPON BEET SUGAR MFG. CO., LTD

发明人： Takashi Kanno ,  Koji Sayama ,  Tsutomu Aritsuka ,  Hiroto Kikuchi

IPC分类号： C07C227/38 ,  C07D209/20

CPC分类号： C12P13/005 ,  C12P13/04 ,  C12P13/06 ,  C12P13/08 ,  C12P13/22 ,  C12P13/225

摘要： A method for recovering amino acids, which comprises supplying a mixed solution containing inorganic acid salts, amino acids and non-electrolytes such as saccharides to a first-step resin layer comprising an Na type or K type strongly acidic ion exchange resin; separating an effluent into at least a first fraction containing coloring matters, acidic amino acids and ashes, a second fraction containing neutral amino acids and saccharides, and a third fraction containing betaines; supplying the second fraction to a second-step resin layer comprising at least one resin selected from the group consisting of NH4 type, Ca type and Mg type strongly acidic ion exchange resins, and optionally further supplying it to a third-step resin layer comprising an Mg type or Ca type strongly acidic ion exchange resin different from the resin of the second-step resin layer, thereby recovering various kinds of amino acids contained in an effluent.