Process for preparing water-soluble tricarboxypolysaccharide
AssigneeMitsubishi Gas Chemical Company, Inc.
InventorsHidechika Wakabayashi, Toru Takahashi, Masaru Sakamoto, Rieko Sano
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Abstract
Disclosed is a process for preparing a water-soluble tricarboxypolysaccharide which includes the step of oxidizing an α-bonding type polysaccharide with a ruthenium compound and an oxidizing agent. The water-soluble tricarboxypolysaccharide, having a high carboxyl group content, can easily and inexpensively be prepared in a high yield without any problem of a post-treatment after the reaction, and thus the present invention is desirable as an industrial preparation process of the water-soluble tricarboxpolysaccharide.
Claims6
A process for preparing a water-soluble tricarboxypolysaccharide by oxidizing an α-bonding type polysaccharide with a high valence ruthenium oxide, which comprises the steps of:
- mixing the α-bonding type polysaccharide and a ruthenium compound in a solvent forming a resultant mixture;
- and adding an oxidizing agent to the resultant mixture to oxidize the ruthenium compound to the high valence ruthenium oxide, thereby to promote the oxidation reaction of the α-bonding type polysaccharide, by the high valence ruthenium oxide to the water-soluble tricarboxypolysaccharide, the oxidation reaction of the α-bonding type polysaccharide taking place in a temperature range of 0°-100° C. and a pH range of 1 to 3, the oxidizing agent being a hypohalogenous acid or salt thereof.
Dependencies are inferred from the claim text.