US 12,331,467 B2
Glyoxylated starch additive for pulp products
Abdus Salam, Kalamazoo, MI (US)
Assigned to Board of Trustees of Western Michigan University, Kalamazoo, MI (US)
Filed by THE BOARD OF TRUSTEES OF WESTERN MICHIGAN UNIVERSITY, Kalamazoo, MI (US)
Filed on Mar. 23, 2023, as Appl. No. 18/125,507.
Claims priority of provisional application 63/323,246, filed on Mar. 24, 2022.
Prior Publication US 2023/0304226 A1, Sep. 28, 2023
Int. Cl. D21H 21/20 (2006.01); D21H 17/07 (2006.01); D21H 17/29 (2006.01); D21H 17/64 (2006.01); D21H 23/10 (2006.01)
CPC D21H 21/20 (2013.01) [D21H 17/07 (2013.01); D21H 17/29 (2013.01); D21H 17/64 (2013.01); D21H 23/10 (2013.01)] 16 Claims
OG exemplary drawing
 
1. 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.