59results about "Cellulose material pulping" patented technology

The present invention relates to a method for preparing lignocellulose nanofibril and a lignocellulose nanofibril prepared by the method. The present invention also relates to a method for preparing a lignocellulose nanofibri reinforced composite material, and a lignocellulose nanofibri reinforced composite material prepared by the method.

The invention belongs to the technical field of mineral flotation, and particularly relates to a cellulose-based coal slime collecting agent and a preparation method and application thereof. The method comprises the following steps: performing wet grinding on recycled waste paper to obtain a paper pulp solution, stirring until paper pulp fibers are uniformly dispersed, adding excessive lithium chloride and sodium periodate, performing stirring reaction, cleaning and centrifuging to obtain precursor cellulose, performing amino alkylation modification to obtain amino alkyl cellulose, preparing the amino alkyl cellulose into a 20 g / L solution, and performing vacuum drying to obtain the lithium ion battery cathode material. And then uniformly mixing with non-polar hydrocarbon oil according to the volume ratio of 1: 2 to obtain the coal slime collecting agent. The prepared coal slime collecting agent contains the hydrophobic nanocellulose with the large length-diameter ratio, in the flotation process, adhesion of bubbles and minerals can be promoted, diffusion of the bubbles is promoted, and the flotation efficiency and the recovery rate are improved.

A blow valve 15 and a biomass processing system 1 comprising such a blow valve Said blow valve 15 being connectable in a blow line 7 which is connecting two differently pressurized vessels 3, 5 of the biomass processing system 1. Said blow valve 15 is configured for controlling the flow of biomass material and fluid in the blow line 7, wherein said blow valve 15 comprises a shutter valve 31 with a central opening 33 of controllable size, said shutter valve 31 comprising a number of valve plates 35 which are disposed in an annular pattern surrounding the central opening 33 of the shutter valve 31 and wherein said valve plates 35 are movable in relation to each other whereby the size of the central opening 33 is controlled by moving the valve plates 35.

The present invention relates to a preparation method for a bamboo fiber for filter paper, filter paper containing the bamboo fiber, and a preparation method for the filter paper. The preparation method for a bamboo fiber for filter paper of the present invention comprises the following steps: (1) material selection: selecting bamboo; (2) chemical treatment: using a chemical agent to perform chemical treatment on the bamboo selected in step (1); (3) defibering: defibering the material obtained by means of the chemical treatment in step (2), to obtain coarse pulp; and (4) screening: screening the coarse pulp obtained in step (3) to obtain the bamboo fiber. The bamboo fiber prepared in the present invention has the mechanical property of a high elastic modulus, and the air filter paper manufactured using the bamboo fiber has the properties of high air permeability, high stiffness and high bulk.

An article including a first fiber derived from a first natural source and a second fiber derived from a fruit. A method of manufacturing an article may include combining a first and second fiber to form a fiber mixture, where the first and second fibers are obtained from discrete materials, and where at least one of the fibers is derived from an edible fruit of a plant. The article may be formed from the fiber mixture.

Feedstock including an amphiphilic lignocellulosic biomass can be processed using enzymes prior to pulping. The enzymes break down the biomass by disrupting the surface or cell walls or by reducing wax or other components. Such enzymes include cellulases, hemicellulases, laccases, peroxidases, and pectinases. Suitable enzymes can be obtained from secretions of microbes in soil organic matter from soil in which the feedstock was grown. If the pulping process includes steam explosion, such enzy matic processing of a biomass prior to steam explosion will increase absorption of water by the processed feedstock. In steam explosion, due to the increased ability of the processed feedstock to absorb water, steam explosion is more effective in breaking apart the processed feedstock. For other pulping processes, such enzymatic treatments break down the biomass, enabling extraction of the desired components from the processed feedstock through subsequent processing using less energy and fewer chemicals.

The present invention relates to a method for preparing monomers via depolymerisation from lignocellulose-containing biomass.

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 application provides a whole-stalk kenaf APMP pulp and a preparation method thereof, and the specific steps comprise the following steps: S1, cutting the air-dried whole-stalk kenaf into strips, washing and removing impurities to obtain material a; S2, pre-steaming the material a, and extruding and defibrating the steamed material to obtain material b; S3, impregnating the material b in a pre-impregnation liquid to form pulp, and centrifugally dewatering the pulp to a concentration of 20-30 wt% to obtain pulp a; S4, grinding the pulp a to form high-concentration ground pulp, adding the high-concentration ground pulp into an adjusting liquid a to bleach, and centrifugally dewatering the high-concentration ground pulp to a concentration of 20-30 wt% to obtain pulp b; S5, adding the pulp b into an adjusting liquid b to perform two-stage bleaching, centrifugally dewatering the pulp b to a concentration of 20-30 wt% to form pulp c, diluting the pulp c, grinding the pulp c, washing and screening after the grinding is completed, and obtaining the whole-stalk kenaf APMP pulp. The whole-stalk kenaf APMP pulp has good pulp properties, breaks the dependence of traditional APMP pulping on wood, and alleviates the shortage of domestic pulping wood resources.

The invention relates to a plant (100) for pulp preparation and supply of pulp of production quality (160) to at least one fiber forming plant (200), wherein the plant is built in scalable modular form, as well as a fiber forming plant (200) with such a plant (100) and a method (300) for building such a plant (100) and a method (400) for extending such a plant (100).The system (100) comprises at least one supply module (110) and one or more process modules (120), wherein the supply module (110) and the process modules (120) are equipped with a multitude of coordinated interfaces (150) to connect the supply and process modules (110, 120) to each other, to ensure the infrastructure supply of the process modules (120), and to receive the pulp or its components and starting materials via at least one input (130) and transport it between the process modules (120), and to offer the pulp with production quality (160) via an output (140) for use by at least one fiber forming system (200).

In general, present invention concerns an integrated lignocellulose-to-chemicals biorefinery, enabling production of renewable n-propylbenzene, phenolic oligomers, and carbohydrate pulp from lignocellulosic biomass. And it concerns an integrated biorefinery, enabling production of renewable n-propylbenzene, phenolic oligomers, and carbohydrate pulp from lignocellulosic biomass.

The application belongs to the technical field of resource utilization of medicinal residue, and particularly relates to a method for selectively extracting cellulose from medicinal residue by oxidation. The method for selectively extracting cellulose from medicinal residue by oxidation provided in the application can efficiently extract cellulose from medicinal residue waste in one step, and realize harmless disposal and resource utilization of medicinal residue waste. The application uses medicinal residue waste as raw material, does not need any pretreatment, removes non-cellulose plant components based on one-step oxidation of potassium peroxydisulfate, efficiently and selectively extracts cellulose, and the purity of the extracted cellulose is as high as 95%. In the application, potassium peroxydisulfate as a strong oxidant degrades the amorphous region of medicinal residue waste, avoiding the removal of non-cellulose plant components by pretreatment. The method provided in the application does not involve toxic or costly chemical reagents, is simple in steps, short in time consumption, low in energy consumption, small in wastewater production, low in COD value, and realizes the recycling of cellulose.

Disclosed herein are systems and methods for concentrating a black liquor solution using a pressure driven filtration process. The systems and methods described herein integrate multiple unit operations with a graphene oxide membrane filtration apparatus to achieve concentration of a black liquor stream. These systems and methods provide a lower energy, more economical solution than currently employed thermal evaporation techniques.

The invention relates to a process for producing a wood fibre material, comprising the steps of: heating wood chips (18) in a pre-cooker (16) by means of water or steam (26), then cooking the wood chips (18) by means of steam (26) in a cooker (14), then fibrising the wood chips (18) in a refiner (32) such that fibre material (34) is produced, wherein some of the steam branches off after fibrising and is used to heat the wood chips (18) in the pre-cooker (16), and also comprising the step of introducing an oxidisation agent (56) into the branched-off steam (26) such that volatile organic substances contained in the steam (26) are oxidised and purified steam (68) is produced, wherein the purified steam (68) is at least partially used to heat the wood chips (18).

The present application provides a preparation method of lignin-containing cellulose nanospheres, comprising the following steps: (1) crushing lignocellulosic biomass raw materials to a particle size of 20-100 mesh to obtain crushed lignocellulosic biomass; (2) mixing the crushed lignocellulosic biomass obtained in step (1) with a ternary eutectic solvent at a mass ratio of 1:10-1:20, stirring and reacting at a temperature of 80-160°C for 4-10 hours; (3) adding a mixture of organic solvent and water to step (2) to terminate the reaction, standing and cooling to room temperature, and then separating the cellulose-rich precipitate; (4) washing the precipitate obtained in step (3) to neutral, mixing with water at a mass ratio of 1:100-1:200, and then repeatedly passing through high-pressure homogenization for several times to obtain lignin-containing nanocellulose spheres. The present application fully combines the pretreatment methods of eutectic solvent and high-pressure homogenization, and has the advantages of mild conditions, simple operation, low cost, small pollution and stable product performance.

A method, system, and apparatus, including a computer program encoded on a computer storage medium, for adjusting a high-pressure feeder of a feeding system used in pulp production based on fluid leakage from a low-pressure outlet of the high-pressure feeder. The method includes obtaining a plurality of flow rates, including (1) a make-up liquor flow rate value, (2) a black liquor flow rate value, (3) a white liquor flow rate value, (4) a chip chute circulation flow rate value, and (5) a high-pressure feeder purge flow rate value. The method can include determining a chip flow rate value that specifies the flow of chips fed to the high-pressure feeder. Based on the flow rate values, the method can determine a fluid leakage value that specifies the amount of fluid leakage through a gap between a pocket rotor and a housing of the high-pressure feeder. The method can adjust the annular gap based on the fluid leakage value satisfying a leakage threshold.

A method for producing a cellulose polymer having a cellulose content of 92% or more from textile waste, It is a mixture of cotton and PET, and the raw material (educt) is less than 1mm in length. The mixture is treated in a reactor with subcritical water at a temperature of 130 to 200° C., particularly preferably 160 to 200° C., and a pressure of 1 to 25 bar, preferably 1 to 10 bar, for about 1 to 120 minutes. A method for producing a cellulose polymer having an average degree of polymerization of 450 to 650.

The application relates to a preparation method of a bamboo fiber for filter paper, a filter paper containing the bamboo fiber and a preparation method of the filter paper. The preparation method of the bamboo fiber for filter paper comprises the following steps: (1) selecting bamboo materials; (2) chemically treating the bamboo materials selected in the step (1) by using chemical medicines; (3) defibrating the material obtained in the step (2) to obtain a coarse pulp; and (4) screening the coarse pulp obtained in the step (3) to obtain the bamboo fiber. The bamboo fiber prepared by the application has the mechanical property of high elastic modulus, and the air filter paper manufactured by using the bamboo fiber has the properties of high air permeability, high stiffness and high bulk thickness.

This invention discloses a method for manufacturing reclaimed adhesive paper from corrugated cardboard boxes, its application, and its specific application in the field of environmentally friendly materials technology. The reclaimed adhesive paper is prepared from short-fiber pulp, cellulase complex, Leuconostoc membranaceus, long-fiber pulp, chitin nanofiber suspension, gum arabic, rosin glycerol ester, and tributyl citrate. By using only waste corrugated cardboard boxes as raw materials and employing bio-enzymatic mild separation technology, this invention effectively avoids the severe damage to fibers caused by traditional high-strength mechanical pulping, successfully obtaining high-strength, high-surface-integrity, high-quality recycled fibers, thus achieving the goal of resource regeneration.

The present invention relates to an apparatus (1) for use in cellulose hydrolysis. The apparatus (1) comprises a channel (10) for guiding a stream of cellulose-containing waste in a flow direction (FD). The apparatus (1) further comprises one two or more shaft(s) (20) arranged to rotate around respective longitudinal axes (A), such that, when rotated, one or more side surfaces (71) of said shaft(s) (20) exhibit a linear velocity vector orthogonal to the axis (A). The two or more shafts (20) include one or more protrusions (70) that radially extend away from the axis (A). The present invention further proposes a method for cellulose hydrolysis.

Systems and techniques can be used to control malodorous emissions from pulp mills, such as Kraft pulp mills discharging sulfur and / or nitrogen-based compounds displeasing to persons living or working in areas neighboring the pulp mill. In some examples, one or more sensors are used to measure air characteristics around the pulp mill. Example sensors include wind sensors and gas sensors. The sensors can provide data indicating whether malodorous emissions will likely blow toward a population concentration area or away from a population concentration area and / or the indicating the concentration of a malodorous compound in the measured air. Control actions can be taken based on the measured sensor data, such as controlling delivery of an odor control agent to reduce or eliminate the malodorous emissions.

The invention discloses corrugated carton recycling and reproducing adhesive paper, a manufacturing method and application, particularly relates to the technical field of environment-friendly materials, and relates to corrugated carton recycling and reproducing adhesive paper, a manufacturing method and application. The corrugated carton recycled and reproduced adhesive paper is prepared from short fiber component pulp, a cellulase complex, leuconostoc mesenteroides, long fiber component pulp, chitin nanofiber suspension, gum arabic, rosin glyceride and tributyl citrate. According to the method, the waste corrugated cartons are completely adopted as raw materials, and a biological enzyme mild separation technology is utilized, so that serious damage to fibers caused by traditional high-strength mechanical pulping is effectively avoided, high-quality regenerated fibers with high strength and good surface integrity are successfully obtained, and the purpose of resource regeneration is achieved.

Disclosed are improved once-dried non-wood pulps, particularly once-dried non-wood pulps prepared from plants of the family Asparagaceae and more particularly one or more plants of the genus Hesperaloe, and methods of producing the same. The manufacturing processes generally comprise at least one mechanical treatment stage, such as mechanical refining, without the addition of chemicals to the biomass to liberate the plant fibers and form a primary pulp. The primary pulp is then dried to form a once-dried pulp. The resulting once-dried non-wood pulps have a high degree of Freeness, such as Freeness ranging of about 400 ml or greater and a relatively modest degree of tensile strength, such as a Tensile Index of about 45 or less. The once-dried non-wood pulps may be readily dispersed in water and are well suited to the manufacture of paper products, particularly tissue products.

The subject of the invention is a method for obtaining at least two cellulose pulps, which comprises: - a step of mixing plant materials comprising at least 60% of lignocellulosic material having a lignin content greater than a given value, of the order of 10%, and also at least 2% of fibrous material having a lignin content less than the given value, - a step of cooking the mixture, - a step of removing the liquid phase in order to isolate a cellulose pulp, - a step of separating the cellulose pulp into at least two cellulose pulps, each having at least one characteristic different from each other. In contrast to the prior art, which selects a portion of a specific plant material to obtain a given cellulose pulp, the invention aims to transform a mixture of less selective plant materials to obtain a cellulose pulp and then to separate the latter in order to obtain two distinct cellulose pulps.

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 tray package unit outer packaging paper (1), for packaging tray packing units (2), to a method for packaging tray packing units (2) using such a tray package unit outer packaging paper (1), to a method for producing same, and to use of an outer packaging material for packing a tray packaging unit (2). The tray package unit outer packaging paper (1) has a first face (3) and a second face (4) and is made of at least one aqueous suspension (5) comprising a cellulose material (6) and optionally additives (7). The first face (3) is compressed with a linear load of 80 kN / m to 500 kN / m. Additionally, the tray package unit outer packaging paper (1) has a wet tensile strength index, measured according to ISO 3781:2011, in the machine direction of at least 10 Nm / g auf.

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.