A method for the synthesis of alkyl ω-carboxy(hydroxyethyl) polysaccharides is described. The method includes methylating or ethylating a polysaccharide or providing a methylated or ethylated polysaccharide, hydroxyethylating the methylated or ethylated polysaccharide, and oxidizing the hydroxyethylated polysaccharide to form the ω-carboxy(hydroxyethyl) polysaccharide. A method for the synthesis of oxidized polysaccharides is also described. The method includes hydroxypropylating a polysaccharide and oxidizing the hydroxypropylated polysaccharides. A method for the production of a solid capable of forming a hydrogel is also described. The method includes combining a first solution comprising an oxidized oligo(hydroxypropyl) polysaccharide bearing one or more ketone groups with a second solution comprising an amine substituted polysaccharide to form a third solution, and removing solvent from the third solution to form the solid, or adding an additional solvent to the third solution to precipitate the solid. Novel polysaccharides and hydrogels prepared according to these methods are also described.

This invention comprising in hydroxypropyl starch for preparing empty capsules in alimentary and medical use, and hydroxypropyl starch-based soft capsules. This invention takes water as solvent, mix with propylene epoxide and catalyst for reaction, after washing, drying, hydroxypropyl starch is completed. The MS level of substitution of starch is around 2˜5, gelatinization point between 25˜60° C. After the hydroxypropyl starch is gelatinized by heating in water, a hydroxypropyl starch matrix soft capsule can be prepared. The invention consists in introducing hydroxypropyl by modifying the molecular chain of starch to improve the flexibility and hydrophilicity of starch. Therefore, a hydroxypropyl starch matrix soft capsule capable of preparing a flexible and disintegrating property is provided.

This invention comprising in hydroxypropyl starch for preparing empty capsules in alimentary and medical use, and hydroxypropyl starch-based soft capsules. This invention takes water as solvent, mix with propylene epoxide and catalyst for reaction, after washing, drying, hydroxypropyl starch is completed. The MS level of substitution of starch is around 2˜5, gelatinization point between 25˜60° C. After the hydroxypropyl starch is gelatinized by heating in water, a hydroxypropyl starch matrix soft capsule can be prepared. The invention consists in introducing hydroxypropyl by modifying the molecular chain of starch to improve the flexibility and hydrophilicity of starch. Therefore, a hydroxypropyl starch matrix soft capsule capable of preparing a flexible and disintegrating property is provided.

The present disclosure describes methods for reducing the content of minerals, metals, ions, and/or other undesirable contaminants in vegetable oil, such as corn oil, obtained from fermentation of ground vegetable material. In one aspect, the methods herein produce distiller's corn oil having low amounts of minerals, metals, ions, and/or other contaminants rendering the corn oil more suitable for various further uses, such as biofuel production, with little to no additional refining.

The present disclosure relates to the technical field of building additives, and in particular to a preparation method of modified starch ether for improving the anti-sliding property of a ceramic tile adhesive. The preparation method includes chemical modification of subjecting starch to one-step etherification to obtain starch ether, followed by physical modification. In the preparation method, the cumbersome multi-step etherification in existing methods for preparing modified starch ether is avoided, and only one-step etherification is used to obtain modified starch ether of better properties. Because physical modification is added, the obtained product can significantly improve the anti-sliding property of a ceramic tile adhesive. Moreover, the conditions for one-step etherification are significantly different from the prior art.

A method for the etherification of a carbohydrate is provided, by subjecting the carbohydrate to superheated steam under alkaline conditions in the presence of an etherification agent to obtain a carbohydrate ether.

Modified biopolymers, such as, charge-modified biopolymers, cross-linked biopolymers, and cross-linked, charge-modified biopolymers are provided along with methods of producing and using the same.

Modified biopolymers, such as, charge-modified biopolymers, cross-linked biopolymers, and cross-linked, charge-modified biopolymers are provided along with methods of producing and using the same.

The present disclosure relates to the technical field of building additives, and in particular to a preparation method of modified starch ether for improving the anti-sliding property of a ceramic tile adhesive. The preparation method includes chemical modification of subjecting starch to one-step etherification to obtain starch ether, followed by physical modification. In the preparation method, the cumbersome multi-step etherification in existing methods for preparing modified starch ether is avoided, and only one-step etherification is used to obtain modified starch ether of better properties. Because physical modification is added, the obtained product can significantly improve the anti-sliding property of a ceramic tile adhesive. Moreover, the conditions for one-step etherification are significantly different from the prior art.

Modified biopolymers, such as, charge-modified biopolymers, cross-linked biopolymers, and cross-linked, charged modified biopolymers are provided along with methods of producing and using the same.