Processes disclosed are capable of converting biomass into high-crystallinity, hydrophobic cellulose. In some variations, the process includes fractionating biomass with an acid (such as sulfur dioxide), a solvent (such as ethanol), and water, to generate cellulose-rich solids and a liquid containing hemicellulose and lignin; and depositing lignin onto cellulose fibers to produce lignin-coated cellulose materials (such as dissolving pulp). The crystallinity of the cellulose material may be 80% or higher, translating into good reinforcing properties for composites. Optionally, sugars derived from amorphous cellulose and hemicellulose may be separately fermented, such as to monomers for various polymers. These polymers may be combined with the hydrophobic cellulose to form completely renewable composites.

Processes disclosed are capable of converting biomass into high-crystallinity, hydrophobic cellulose. In some variations, the process includes fractionating biomass with an acid (such as sulfur dioxide), a solvent (such as ethanol), and water, to generate cellulose-rich solids and a liquid containing hemicellulose and lignin; and depositing lignin onto cellulose fibers to produce lignin-coated cellulose materials (such as dissolving pulp). The crystallinity of the cellulose material may be 80% or higher, translating into good reinforcing properties for composites. Optionally, sugars derived from amorphous cellulose and hemicellulose may be separately fermented, such as to monomers for various polymers. These polymers may be combined with the hydrophobic cellulose to form completely renewable composites.

The invention relates to a method and an apparatus for separating lignocellulose particle fraction (3) and lignin particle fraction (4), in which crude lignin (1) formed from starting material (6) comprises lignocellulose particles and lignin particles. According to the invention, the method comprises adding stabilizing chemical (11) and/or hydrophobic chemical (12) into the crude lignin (1) in at least one step, and treating the crude lignin by separating the lignin particle fraction (4) and lignocellulose particle fraction (3) from each other in at least one separation step (2,8,9,10). Further, the invention relates to a lignocellulose particle fraction and a lignin particle fraction and their uses.

The present invention relates to a microfibrillated cellulose composition comprising a microfibrillated cellulose originating from agricultural biomass, said microfibrillated cellulose composition comprising: 30 wt % cellulose, 1-15 wt % pectin, 8-25 wt % hemicellulose, 0-12 wt %, lignin, 0-15 wt % ash, and 0-8 wt % protein, based on dry solids content of said composition. The present invention further relates to its manufacture, and use in and manufacture of paper and paperboard products.

The present invention relates to a microfibrillated cellulose composition comprising a microfibrillated cellulose originating from agricultural biomass, said microfibrillated cellulose composition comprising: 30 wt % cellulose, 1-15 wt % pectin, 8-25 wt % hemicellulose, 0-12 wt %, lignin, 0-15 wt % ash, and 0-8 wt % protein, based on dry solids content of said composition. The present invention further relates to its manufacture, and use in and manufacture of paper and paperboard products.

A method and an apparatus for separating lignocellulose particle fraction (3) and lignin particle fraction (4), in which crude lignin (1) formed from starting material (6) comprises lignocellulose particles and lignin particles. The method comprises adding stabilizing chemical (11) and/or hydrophobic chemical (12) into the crude lignin (1) in at least one step, and treating the crude lignin by separating the lignin particle fraction (4) and lignocellulose particle fraction (3) from each other in at least one separation step (2,8,9,10). Further, a lignocellulose particle fraction and a lignin particle fraction and their uses.

Composite molded pulp products prepared from fruit or vegetable-based pomace, fibrous paper-based materials, and cellulose nanofiber and methods for preparing the same are provided.

Composite molded pulp products prepared from fruit or vegetable-based pomace, fibrous paper-based materials, and cellulose nanofiber and methods for preparing the same are provided.

The present disclosure relates to a method of producing hydrophobic paper, using a sizing additive based on depolymerized lignin and a hydrophobic paper obtainable by such method.

The present disclosure relates to a method of producing hydrophobic paper, using a sizing additive based on depolymerized lignin and a hydrophobic paper obtainable by such method.