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US 12,331,467 B2Granted
Glyoxylated starch additive for pulp products
AssigneeThe Board of Trustees of Western Michigan University
InventorAbdus Salam
Life of this patent
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Abstract
A glyoxylate starch may be formed by dispersing a starch in a liquid to form a starch slurry. The starch may be one or more of a cationic starch, nonionic starch, and an anionic starch. 2-chloracetamide is added to the starch slurry mixture to form a first reaction mixture. The temperature of the first reaction mixture may then be raised, and then cooled to form a modified starch, and glyoxal may be added to the modified starch solution to form a second reaction mixture that may then be stirred to produce a glyoxylate starch.
Claims16
A method of synthesizing glyoxylate starch, the method comprising:
- dispersing at least one starch selected from the group consisting of cationic starch, nonionic starch, and anionic starch in a liquid to form a starch slurry;
- combining NaOH with the starch slurry to form a starch slurry mixture;
- adding 2-chloroacetamide to the starch slurry mixture to allow the 2-chloroacetamide to react with the starch of the starch slurry mixture to form a first reaction mixture;
- raising the temperature of the first reaction mixture;
- followed by cooling of the first reaction mixture to about room temperature to form a modified starch solution including a modified starch selected from the group consisting of cationic starch, nonionic starch, and anionic starch;
- adding glyoxal to the modified starch solution to form a second reaction mixture;
- stirring the second reaction mixture to form glyoxylate starch selected from the group consisting of glyoxylate cationic starch, glyoxylate nonionic starch, and glyoxylate anionic starch.
4 more elements
Dependencies are inferred from the claim text.