PROCESS FOR PRODUCING METAL COMPLEX OF AMINOOLIGOSACCHARIDE DERIVATIVE

摘要

A process for producing a highly purified metal complex of an aminooligosaccharide derivative by effectively removing impurities, by-products, excess eluates, etc. generated in the step of synthesizing the aminooligosaccharide derivative and the step of forming the metal complex thereof. The process comprises subjecting a crude liquid reaction mixture containing an aminooligosaccharide derivative to the step of complexing with metal ions and to a purification step, wherein the purification step comprises at least one stage by the solvent extraction method, anion-exchange method, filter membrane separation method, electrodialysis, or adsorption method.