| abstract |
(57) [abstract] (with revision) [Problem] A scale adhesion inhibitor, a pigment dispersant, a sizing agent, Provided is a method for producing a carboxy polysaccharide which can be suitably used as a detergent builder, in addition to a concrete admixture. A method for producing a carboxy polysaccharide, comprising oxidizing a polysaccharide with nitrogen dioxide / dinitrogen tetroxide in the presence of a transition metal catalyst. |