A method for making a specialty fiber by activating pulp in an alkaline aqueous medium, then reacting it a water-soluble, multi-functional reagent able to bridge neighboring cellulose chain within a single fiber. The resultant specialty cellulose fibers have high intrinsic viscosity and may be used to make cellulose ethers, cellulose acetate, and viscose.

Provided is a method for producing a cellulose derivative. The method includes forming a first reaction product by reacting non-oxidized cellulose with at least one first alkalization agent in the presence of at least one suitable solvent, wherein the first reaction product includes a non-oxidized alkali-cellulose. The method further includes forming a second reaction product by reacting a monohalo-organic compound with a second alkalization agent in a solution, wherein the second reaction product includes a saturated solution and a sediment. The method further includes increasing a temperature of the saturated solution and dissolving at least a portion of the sediment, and reacting the non-oxidized alkali-cellulose with the second reaction product to form an improved carboxymethyl cellulose.

Provided is a method for producing a cellulose derivative. The method includes forming a first reaction product by reacting non-oxidized cellulose with at least one first alkalization agent in the presence of at least one suitable solvent, wherein the first reaction product includes a non-oxidized alkali-cellulose. The method further includes forming a second reaction product by reacting a monohalo-organic compound with a second alkalization agent in a solution, wherein the second reaction product includes a saturated solution and a sediment. The method further includes increasing a temperature of the saturated solution and dissolving at least a portion of the sediment, and reacting the non-oxidized alkali-cellulose with the second reaction product to form an improved carboxymethyl cellulose.

The invention is directed to compositions and processes concerning efficient downstream processing of products derived from organic acids pretreatment of plant materials.

The invention is directed to compositions and processes concerning efficient downstream processing of products derived from organic acids pretreatment of plant materials.

Hydroxypropyl methyl cellulose having a high thermal gel strength even at a low viscosity is provided and utilized. Specifically provided is hydroxypropyl methyl cellulose having such properties that a 2% by weight aqueous solution of the hydroxypropyl methyl cellulose has a viscosity at 20° C. of 300 to 2,000 mPa.Math.s and a storage elastic modulus at 85° C. of 2,000 to 4,500 mPa. Also provided is a food comprising the hydroxypropyl methyl cellulose. Further provided is a method for producing the hydroxypropyl methyl cellulose, the method comprising a step of depolymerizing, with an acid, high-viscosity hydroxypropyl methyl cellulose having such a property that a 2% by weight aqueous solution of the high-viscosity hydroxypropyl methyl cellulose has a viscosity at 20° C. of 70,000 to 100,000 mPa.Math.s to obtain the hydroxypropyl methyl cellulose.

The present invention provides a method for extracting a solid purified product from an alkaline polysaccharide-containing precursor material, comprising the steps of: (a) neutralising the alkaline polysaccharide-containing precursor material with an acid and obtaining a neutralised solid polysaccharide-containing material; (b) mixing the neutralised solid polysaccharide-containing material with bleach to create a mixture; and (c) separating a solid purified product from the mixture.

The present invention provides a method for extracting a solid purified product from an alkaline polysaccharide-containing precursor material, comprising the steps of: (a) neutralising the alkaline polysaccharide-containing precursor material with an acid and obtaining a neutralised solid polysaccharide-containing material; (b) mixing the neutralised solid polysaccharide-containing material with bleach to create a mixture; and (c) separating a solid purified product from the mixture.

Pulps, cellulose ether products, and methods of making pulps are described.

Provided is a novel manufacturing method whereby a carboxymethylated cellulose nanofiber dispersion having high tarnasparency can be obtained economically. In carboxymethylation of cellulose in the present invention, mercerization is performed in water as the main solvent, after which carboxymethylation is performed in a solvent mixture of water and an organic solvent, By defibrating the resultant carboxymethylated cellulose, a carboxymethylated cellulose nanofiber dispersion having high transparency can be obtained economically.