Described is a method of kraft pulping in which a phenolic compound is added to the cooking step. The phenolic compound is added at a time point between about 5 minutes and about 120 minutes prior to completion of the cooking step. The presence of the phenolic compound increases the extent of delignification in the cooking step.

A method for controlling the deposition of stickies in pulping and papermaking processes comprises adding to fiber pulp or stock an additive comprising an organo-modified siloxane.

Provided is a method of producing fine cellulose fibers that are nanosized, that have a high crystallinity degree, and that are less vulnerable to fiber shape damage, the method including impregnating cellulose with a fibrillation solution to fibrillate the cellulose without mechanical crushing, and modifying the cellulose. The method of producing cellulose microfibrils of the present invention includes impregnating cellulose with a fibrillation solution containing a carboxylic acid vinyl ester or an aldehyde and an aprotic solvent having a donor number of 26 or more to fibrillate the cellulose. The aldehyde is at least one kind of aldehyde selected from the group consisting of an aldehyde represented by the following formula (1), paraformaldehyde, cinnamaldehyde, perillaldehyde, vanillin, and glyoxal:

R.sup.1CHO(1)

where R.sup.1 represents a hydrogen atom, an alkyl group having 1 to 16 carbon atoms, an alkenyl group, a cycloalkyl group, or an aryl group.

Disclosed herein are compositions comprising an acid; a modifying agent selected from the group consisting of: sulfamic acid; imidazole; an imidazole derivative; taurine; a taurine derivative; a taurine-related compound; an alkylsulfonic acid; an arylsulfonic acid; triethanolamine; and combinations thereof; a peroxide salt; and a peroxide. Also disclosed herein are compositions comprising an acid; a modifying agent comprising a compound containing an amine group and a compound comprising a sulfonic acid moiety; a peroxide salt; and a peroxide.

An aqueous composition comprising: sulfuric acid; a heterocyclic compound; an alkanesulfonic acid; and a peroxide. Said composition being capable of delignifying biomass under milder conditions than conditions under which kraft pulping takes place.

An aqueous composition comprising: sulfuric acid; an alkanesulfonic acid; and a peroxide. Said composition being capable of delignifying biomass under milder conditions than conditions under which kraft pulping takes place.

The present disclosure relates to cellulose nanomaterials made or derived from tobacco and methods for the production thereof. The tobacco-derived cellulose nanomaterials can be employed in various industrial applications such as film forming applications and solution thickening technologies. In particular, the disclosure is directed to methods for preparing tobacco-derived cellulose nanomaterials using less fibrillation cycles than in the production of wood pulp. The invention includes a method for preparing tobacco derived nanocellulose material comprising receiving a tobacco pulp in a dilute form such that the tobacco pulp is a tobacco pulp suspension with a consistency of less than about 5%; and mechanically fibrillating the tobacco pulp suspension to generate a tobacco derived nanocellulose material having at least one average particle size dimension in the range of about 1 nm to about 100 nm.

Disclosed are a pulp for Juncao spinning and a preparation method and use thereof. The method includes: placing a Juncao in a solution prepared from a lye, a catalyst, and an auxiliary agent and cooking to obtain a cooked solution, and then subjecting the cooked solution to pulping to obtain the pulp for Juncao spinning.

An aqueous composition comprising: sulfuric acid; a modifying agent comprising a carbonyl-containing nitrogenous base compound; and a peroxide. Said composition being capable of delignifying biomass under milder conditions than conditions under which kraft pulping takes place.

A one-pot process to separate lignin from a lignocellulosic feedstock includes providing a vessel; providing a lignocellulosic feedstock; providing a composition comprising an acid, a modifying agent comprising a carbonyl-containing nitrogenous base compound, and a peroxide; exposing the lignocellulosic feedstock to the composition in the vessel for a period of time sufficient to remove at least 80% of the lignin present in the lignocellulosic feedstock; and optionally, removing a liquid phase comprising dissolved lignin fragments from a solid phase comprising cellulose fibres.