Abstract: The present invention relates to methods for deinking and decolorizing a printed paper, comprising: (a) pulping the printed paper to obtain a pulp slurry; (b) dislodging an ink from the pulp slurry with one or more enzymes; (c) decolorizing the dye contained in the pulp slurry with one or more laccases in the presence of oxygen and optionally one or more chemical mediators; (d) separating the released ink from the pulp slurry; and (e) recovering the decolorized pulp. The present invention also relates to decolorized pulps prepared by such methods and to methods for producing recycled paper.

Abstract: The present invention relates to methods for deinking and decolorizing a printed paper, comprising: (a) pulping the printed paper to obtain a pulp slurry; (b) dislodging an ink from the pulp slurry with one or more enzymes; (c) decolorizing the dye contained in the pulp slurry with one or more laccases in the presence of oxygen and optionally one or more chemical mediators; (d) separating the released ink from the pulp slurry; and (e) recovering the decolorized pulp. The present invention also relates to decolorized pulps prepared by such methods and to methods for producing recycled paper.

Abstract: This invention relates to a process for producing linerboard or corrugated medium.

Abstract: The invention is directed to a method for deinking and uncoating printed paper which comprises using a monocomponent cellulase during recycling.

Abstract: A composition and process are provided for making precipitated biconstituent nylon-polyvinyl alcohol shaped articles by dissolving polyvinyl alcohol and a nylon having an amide group index of less than about 145 in a mixture of a tertiary amine oxide solvent and water, with the solution containing from about 3.0 to about 11% water, to form a biconstituent dispersion wherein the nylon and the polyvinyl alcohol comprise distinct separate phases. Shaped articles can be formed from the biconstituent dispersions of the invention.

Abstract: A composition and process are provided for making precipitated biconstituent nylon-cellulose shaped articles by dissolving a nylon having an amide group index of less than about 145, in a mixture of a tertiary amine oxide solvent and water, containing from about 0.5% to about 11% water based on the weight of the solution; separately forming a solution of cellulose in a tertiary amine oxide solvent containing from about 0.8 to about 29% water based on the weight of the solution and then interdispersing the two solutions to form a biconstituent dispersion. Shaped articles can be formed from the biconstituent dispersions of the invention.

Abstract: A composition and process are provided for making precipitated biconstituent cellulose-polyvinyl alcohol shaped articles by dissolving polyvinyl alcohol and cellulose in a tertiary amine oxide solvent containing from about 0.8 to about 29% water to form a biconstituent dispersion wherein the cellulose and polyvinyl alcohol comprise distinct phases, preferably with the two solutions codispersed within each other. Shaped articles can be formed from the biconstituent dispersions of the invention.

Abstract: A composition and process are provided for making precipitated hydroxyethyl cellulose by dissolving a hydroxyethyl cellulose having a molar substitution of less than 1.0, and a degree of substitution of less than about 0.64 in mixture of water and a tertiary amine oxide solvent, to provide a solution containing from about 10% to about 28% water. Shaped articles can be formed from the solutions of the invention.

Abstract: A composition and process are provided for making certain precipitated nylons by dissolving a nylon having an amide group index of less than 145, in a mixture of a tertiary amine oxide solvent and water. The nylon solutions of the invention contain from about 0.5% to about 11% water. Shaped articles can be formed from the solutions of the invention.

Abstract: Regenerated cellulose products containing formaldehyde cross linked sodium lignate or sodium lignosulfonate in an amount of from about 1% to about 40% by weight based on the weight of the cellulose in the product are prepared by mixing one of the cross linked lignin derivatives or a mixture thereof substantially uniformly in a viscose solution and extending the solution into a spin bath in which the extruded viscose streams coagulate into filaments containing the cross linked lignin derivative. The extended regenerated product may be used as a fiber in absorbent cellulose products such as diapers, sanitary napkins, tampons and the like.

Abstract: An improved process is provided for making a precipitated cellulose product wherein cellulose is dissolved in a solvent containing both a tertiary amine N-oxide solvent and water and precipitated therefrom with water or other non-solvent for cellulose. The water content of the solution may be adjusted to any level of up to about 29% by weight with the amount of water decreasing substantially linearly as the cellulose is increased. A solution substantially free from undissolved cellulose and solid tertiary amine N-oxide which is adapted to be spun, extruded or molded at a temperature below the melting point of the tertiary amine N-oxide can be prepared with a solvent which contains water within a specified critical range mixed with the tertiary amine N-oxide. Preferably, N,N,N-triethylamine N-oxide or a tertiary amine N-oxide having a cyclic or pseudo-cyclic molecular structure is mixed with water to form the solvent.

Abstract: Regenerated cellulose products containing formaldehyde cross linked sodium lignate or sodium lignosulfonate in an amount of from about 1% to about 40% by weight based on the weight of the cellulose in the product are prepared by mixing one of the cross linked lignin derivatives or a mixture thereof substantially uniformly in a viscose solution and extruding the solution into a spin bath in which the extruded viscose streams coagulate into filaments containing the cross linked lignin derivative. The extended regenerated product may be used as a fiber in absorbent cullulose products such as diapers, sanitary napkins, tampons and the like.

Abstract: Nylon 6 containing a metal salt of a copolymer of a vinyl ether and 2-acrylamido-2-methylpropanesulfonic acid to improve its affinity for cationic dyes is provided.

Abstract: A process is provided for making precipitated cellulose by dissolving cellulose in a tertiary amine oxide solvent containing from about 1.4 to about 29% of water.

Abstract: A solution of cellulose or cellulose derivative suitable for spinning, extruding or other shaping process is prepared by steeping unaged cellulose or a cellulosic derivative a plurality of times, consecutively, subsequently shredding and then aging prior to xanthation or the like. The concentration of alkali metal hydroxide of the solution used for resteeping is lower than that in the first steeping step. The process produces a viscose with less carbon disulfide than the conventional process without reduction in yield of cellulose. The process is adaptable for steeping in conventional press steeping apparatus or slurry steeping apparatus.