Archer Daniels Midland Company

Nicolas Nourry

George Koutlakis

Danick Godin

Isabelle Bolduc

André Laforest

Anne-Claude Couffin

Vladimiro Nettel

Mohammed Berrada

Claude Thibodeau

Shuojia Dong

David Bergeron

Oscar Suarez-Hernandez

Frédéric Picard

Claude Couture

Nicole Lachapelle

Caroline Lavergne

Catherine Theriault

Andre Laforest

The present disclosure relates to particles comprising carboxyalkyl starch that are permeated with an acidic gas and their uses as absorbent materials. It was discovered that superabsorbent materials could be obtained from carboxyalkyl starch particles permeated with the acidic gas and heated to a temperature of at least 100&#xb0; C. until they reach an AUL at 0.7 psi. of at least 14 g/g and a CRC of at least 18 g/g. Moreover, it was discovered that the pH of alkaline starch extrudates can be adjusted by permeating particles of the extrudate with the acidic gas even with treating the particles to temperatures less than 100&#xb0; C. The carboxyalkyl starch particles obtained by the methods described herein are characterized as having intramolecular ester bonds, which are greater in number at the surface of the particle than in the core, and the particles have a greater concentration of cation of the acidic gas at the surface than a the core.

Acidic gas-permeated carboxyalkyl starch particles, extrudates, and process for making the same

Acidic gases permeated carboxyalkyl starch and alkaline starch extrudates and process for making the same

Absorbent boronate-galactomannan complexes comprising a hydrophobic group are disclosed. The boronate-galactomannan complexes are solid materials capable of gel forming upon contacting with liquids. The boronate-galactomannan complexes are particularly suitable for absorbing liquids.

Absorbent hydrophobic boronate galactomannan complexes and process for producing same

The present invention relates an absorbent material consisting of a molecular network of starch molecules, the starch molecules comprising an amylopectin content of at least 90% (w/w). The molecular network can either be comprised of self-entangled starches or cross-linked starches.

Starch networks as absorbent or superabsorbent materials and their preparation by extrusion

Surface-treated carboxyalkylated polysaccharides comprising a biobased content of at least 82% are described herein. The surface-treated carboxyalkylated polysaccharides comprise a CRC of at least 18 g/g, a FSC of at least 26 g/g, and an AUL at 0.7 psi of at least 14 g/g. Processes for the manufacture of surface-treated carboxyalkylated polysaccharides are also described herein.

Superabsorbent surface-treated carboxyalkylated polysaccharides and process for producing same

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St-Amable, Canada

Nicolas Nourry