8results about "Cellulose material pulping" patented technology

The application discloses a food-grade high-strength and high-toughness paper pulp, paper products and a preparation method thereof, and belongs to the technical field of papermaking. The food-grade high-strength and high-toughness paper pulp comprises 100 parts of virgin wood pulp, 1-3 parts of alginic fiber, and 0.3-1.5 parts of a wet strength agent, and the wet strength agent is a random copolymer of methyl acrylate, glycidyl ether-based polyethylene glycol monoallyl ether, dihydro-jasmine acid methyl acryloyl oxy hydroxypropyl ester and acrylamide propyl trimethyl ammonium chloride. The alginic fiber and the wet strength agent are added into the virgin wood pulp, so that the strength and toughness of the paper products are improved.

The invention relates to a method for obtaining peat-substitute fibres from fibre-containing biomass, in particular annual plants, wherein the biomass is subjected to hydrothermal digestion in a thermal hydrolysis process, preferably via steam explosion, and then a first separation of the digested biomass into a first fibre fraction and a liquid phase, which is enriched with dissolved organic and inorganic substances and finely suspended solids. According to the invention, before the hydrothermal digestion, the biomass is comminuted, then process water is added to mash the comminuted biomass, and after the hydrothermal digestion, the digested biomass is mashed again, preferably in a further step, and then the first separation is carried out.

A digestion accelerator comprising at least one digestion accelerating component selected from the group consisting of casein, an amino acid having an aromatic ring or a heterocyclic ring, and salts thereof.

The present invention provides a biobased and biodegradable cooking enhancement formulation for kraft pulping and a process for preparing the same. The formulation comprises lauryl alcohol ethoxylate, alpha olefin sulphonate, polysorbate-20, lactic acid, and water as essential components. The synergistic combination of these ingredients enhances delignification efficiency in kraft cooking by improving liquor impregnation, promoting oxidation through in situ peracid generation, and stabilizing oxidized lignin fragments through emulsification. The formulation enables efficient delignification at reduced active alkali concentration and lower cooking severity, thereby improving pulp brightness and yield while reducing rejects and pitch content. The biobased composition provides a non-toxic and environmentally safe alternative to conventional anthraquinone-based cooking aids and is completely biodegradable. The invention thus offers an effective and sustainable solution for improving kraft pulping performance and process efficiency.

The application discloses a kind of clean pulp production system and its production process, it is related to the technical field of needle pulp preparation, including clean cavity, two drive shafts are symmetrically arranged in it, drive assembly is arranged on the side of clean cavity, for driving the rotation of the drive shaft, adjusting shaft is slidably arranged in the drive shaft, guide table is arranged on the outer periphery of adjusting shaft, sliding groove is opened in the outer periphery of drive shaft corresponding to the position of guide table.The present application generates a large number of fine bubbles through air pump and paddle, the needle pulp fibers are lifted to the liquid surface by these bubbles, and the dispersed needle pulp fibers are carried upward during the rising process, while the undispersed needle pulp fibers are difficult to be lifted upward by the bubbles due to their high quality and clumpy shape, only the dispersed pulp fibers can be selected, thereby effectively realizing flotation separation and avoiding the clumpy fibers from entering the next process.

A process for producing mechanical wood pulp is provided, wherein the process comprises a step of grinding optionally pretreated wood chips in a refiner unit at an operating temperature of at least 155°C, a bleaching formulation is added prior to and / or during the grinding step, and the bleaching formulation comprises (A) a salt of the dithionous acid H2S2O4, and (B) a salt comprising a polyanionic component having at least 5 anionic units, selected from a COO- group and a PO3 - group.