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Matches 101 - 150 out of 4,535

Document Document Title
WO/2021/213741A1
In a process for oxidation of white liquor, in particular of white liquor used in a process for production of paper or cellulose, the oxygen required for the oxidation is supplied to the reactor or the reactors in which the oxidation is ...  
WO/2021/214300A1
The present invention relates to solid compositions comprising a fibrous material of natural origin obtained from plants, wherein the fibrous material comprises micro-scaled and/or nano-scaled fibril agglomerates, and an alditol; a metho...  
WO/2021/216663A1
A piece of natural plant material is subjected to one or more chemical treatments to remove substantially all lignin therefrom, thereby allowing the extraction of delignified, cellulose-based fibers. For example, the natural plant materi...  
WO/2021/213740A1
In a process/an apparatus for producing bleached cellulose in which a lignin- and cellulose-containing suspension is subjected to at least one process step for oxygen-assisted bleaching in a reactor, such as alkaline oxygen delignificati...  
WO/2021/209586A1
A process for delignification of wood fibers is provided, comprising a) providing a lignin-containing cellulosic pulp selected from chemical pulp and semi-chemical pulp, said pulp having a weight content of magnesium of at least 0.001 % ...  
WO/2021/206601A1
A pulp distribution compartment arrangement (20) comprises a distribution compartment (24) and a distributer screw (30). The distribution compartment has an exit opening (26) with an elongated shape with a main extension in a first direc...  
WO/2021/198557A1
A method of controlling viscosity in peroxide bleaching of a cellulose pulp, comprising treating the cellulose pulp with disodium 3,3'-((2-ethylhexyl)azanediyl)dipropionate as a chelating agent to chelate metals present in the pulp; pero...  
WO/2021/185704A1
There is provided a process for chemically pretreating reclaimed cellulose fibres to be used in the production of moulded bodies from regenerated cellulose, wherein the pretreatment includes one stage, in which stage acid metal removal a...  
WO/2021/161494A1
In vertical concentrating washing machines, processed raw material is transported upward but ends up containing shower water. That is, the moisture content ends up increasing during the transport process even though the material has been...  
WO/2021/151904A1
The invention relates to a method for obtaining a cellulosic pulp from a plant material comprising, by weight, at least 50% hemp stalks harvested at or after the flowering stage of maturity, the hemp stalks having at least 30% hemp chaff...  
WO/2021/151149A1
Disclosed is a process of defibrillating bacterial nanocellulose. The process may comprise providing a pulp comprising bacterial nanocellulose and an alkaline solution and freezing the pulp to form a frozen pulp. The process may comprise...  
WO/2021/152958A1
The purpose of the present disclosure is to provide a method for producing a pulp fiber for carboxylated cellulose nanofibrillation use, whereby it is possible to form a carboxylated cellulose nanofiber having an excellent balance betwee...  
WO/2021/130102A1
The invention relates to a process for catalytically oxidising an unbleached cellulose paste, comprising the following steps: supplying to a reactor an unbleached cellulose paste; supplying a heterocyclic nitroxyl radical; supplying chlo...  
WO/2021/123504A1
The present invention relates to a process for manufacturing a fibre web, such as paper, board, tissue or the like. In the process bleached cellulose-containing fibres are suspended into process water in order to prepare a fibre stock, w...  
WO/2021/118425A1
Method for treating biomass, comprising compressing and dewatering (62) the biomass to a dry solid content of DS1 % by weight; feeding (63) compressed biomass to a treatment vessel; adding (64) a treatment liquid to said treatment vessel...  
WO/2021/099679A1
The present invention relates to a method for controlling discharges of nitrogen compounds in the production of cellulose carbamate (CCA). Dissolving pulp (DP) or kraft pulp is produced at a pulp mill, and the DP or kraft pulp is activat...  
WO/2021/097280A1
A system and method are provided for predictive control of brown stock treatment at a pulp mill. Various online sensors generate output signals representative of actual values for respective process characteristics, each of which are dir...  
WO/2021/094439A1
There is provided a method of producing a sheet having a density of 0.6-1.3 g/cm3 measured according to ISO 534:2011, the sheet comprising chemically modified cellulose fibres, wherein the method comprises: a. providing chemically modifi...  
WO/2021/097270A1
A process for the production of cellulose, lignocellulosic sugars, lignosulfonate, and ethanol from lignocellulosic biomass. The process comprises steaming, pretreatment, chemical recovery, saccharification, and optionally fermentation. ...  
WO/2021/082306A1
The present invention relates to an ionic-liquid-based ECF bleaching protective agent for paper pulp. The present application involves pre-treating eucalyptus kraft pulp with the ionic-liquid-based bleaching protective agent, followed by...  
WO/2021/069696A1
There is provided a method of producing a paper, comprising the steps of: a) providing a pulp having a Schopper-Riegler (SR) number measured according to ISO 5267-1:1999 of 25-50, which pulp comprises at least 70% by weight sulphate or s...  
WO/2021/057159A1
The present invention relates to the field of paper pulp processing. Disclosed is a processing technology for removing adhesive substances from paper pulp. A preparation method mainly comprises: first performing heat dispersion on a pulp...  
WO/2021/061723A1
Paper products can comprise a first plurality of fibers that are hardwood fibers and a second plurality of fibers that include softwood fibers and surface enhanced pulp fibers (SEPF). The paper product can include one or more first fiber...  
WO/2021/053446A1
A high efficiency bleaching method for cellulosic pulp includes: (a) providing a charge of aqueous cellulosic pulp to a bleaching vessel at a consistency of from 10% to 30% along with a peroxy bleaching agent and an alkaline agent effect...  
WO/2020/249992A9
The high alpha and high Intrinsic Viscosity pulp production apparatuses, methods and systems (hereinafter "high-A high-IV pulp production") disclosed herein provide for pulp processing used in connection with Kraft Processes (KP) or Pre ...  
WO/2021/044321A1
The present invention is directed to fluff pulp having a Kappa number in the range of from 5 to 18 and having, when in the form of a dry sheet, ISO brightness in the range of from 30 to 60% and having a specific volume in the dry defibra...  
WO/2021/041782A1
The invention herein disclosed and claimed is a process for refining fiber from lignocellulosic biomass. The process provides refined fiber and agriculturally amenable co-products, with a virtually waste-free systems design.  
WO/2021/020251A1
The present invention addresses the problem of providing a novel method for producing bleached pulp which is excellent overall in various performance categories such as whiteness or fading. Said problem is solved by the following metho...  
WO/2021/018751A1
The use of a GH8 xylanase in the treating of pulp for preparing paper materials, such as printing and writing paper, tissue and towel, newsprint, carton board, containerboard and packaging papers.  
WO/2021/014206A1
Methods for preparing aqueous suspensions comprising microfibrillated cellulose, and optionally inorganic particulate material, with increased tensile properties, and methods for selecting a fibrous substrate comprising cellulose for pre...  
WO/2021/009114A1
A process for producing surface modified bleached chemical pulp fiber comprising fluidizing the bleached chemical pulp fiber and contacting the fluidized bleached chemical pulp fiber with an aerosol of a surface modifying composition com...  
WO/2021/006798A1
A method for the manufacturing of cellulose dissolving pulp from virgin wood cellulose and crude recycled textile cellulosic material by charging recycled textile material to a brownstock washing step, an oxidative alkaline pulp bleachin...  
WO/2021/001751A1
The present invention relates to a refined cellulose fiber composition useful as a strength enhancing agent for paper and paperboard, wherein the refined cellulose fiber composition has a Schopper-Riegler (SR) number in the range of 80-9...  
WO/2020/264311A1
The present disclosure is directed to an apparatus and method for processing lignocellulosic material. The apparatus includes a vessel having a fluid separation plate disposed therein, a fluid circulating system in fluid communication wi...  
WO/2020/263160A1
A torque reaction arrangement (50) for twin press-roll pulp washers comprises a first torque reaction arm (10), a second torque reaction arm (20), a first link (19), and a second link (29). The links are provided between the ends of a re...  
WO/2020/260625A1
Disclosed is a method for quantification of water and/or one or more ionic liquid components in an ionic liquid (IL)/water (H2O) mixture. The method comprises obtaining one or more Raman spectra for the IL/H2O mixture, and using a quanti...  
WO/2020/260323A1
There is provided a method comprising the steps of: a) pretreating cellulose fibres so as to obtain pretreated cellulose fibres; and b) polymerizing monomers on the pretreated cellulose fibres so as to obtain cellulose fibres coated with...  
WO/2020/246137A1
Provided is a method for producing softwood-derived pulp fibers for paper, the method being capable of reducing the propensity for the product surface to become rough, and capable of reducing the propensity for the tensile strength to be...  
WO/2020/244938A1
A pulp treating arrangement (10) comprises a pulp treating apparatus (100), which receives first pulp (150), the first pulp (150) including at least one of the following: virgin pulp (152) 5and recycled pulp (154); performs a processing ...  
WO/2020/245072A1
The present invention relates to a semi-bleached or unbleached Eucalyptus globulus pulp, the use of which for the production of tissue products allows the development of key properties of such products, such as bulk, strength, absorption...  
WO/2020/245055A1
The invention relates to a method for providing a prepared cellulose-containing mixed source material (110), in particular, a mixed source material (110) for forming a cellulose shaped body (102), in particular, a regenerated cellulose s...  
WO/2020/234761A1
Process for the treatment of lignocellulosic biomasses with a process solvent selected from a eutectic solvent consisting of a hydrogen bond acceptor and of a hydrogen bond donor, an ionic liquid and a mixture of said eutectic solvent an...  
WO/2020/229730A1
According to an example aspect of the present invention, there is provided a method of treating, such as hydrolysing, a cellulosic material, comprising: preparing a mixture comprising or consisting of a cellulosic material and a chlorite...  
WO/2020/229722A1
The invention relates to method for producing viscosity controlled cellulosic material having a viscosity value in a range between 150 ml/g and 500 ml/g in a continuous process, the method comprising the following steps: i) forming a cel...  
WO/2020/229732A1
The present invention relates to the fields of treating lignocellulosic material. Specifically, the invention relates to a method of fractionating a lignocellulosic material, wherein said method comprises contacting a lignocellulosic mat...  
WO/2020/230351A1
Provided is a pulp washing agent capable of improving "dewaterability" and "washability". This invention, according to one embodiment, relates to a pulp washing agent containing a nonionic surfactant represented by formula (1): R1O-[(EO)...  
WO/2020/219390A1
A nonwoven sheet can comprise a plurality of cellulosic pulp fibers and a plurality of synthetic polymeric fibers. The cellulosic pulp fibers can include a plurality of cedar pulp fibers that have a length weighted average fiber length o...  
WO/2020/206271A1
A food-safe composition and resulting article with grease and water resistance properties comprised of a petroleum wax based aqueous emulsion, a food-safe coating formulation, and an alkyl ketene dimer (AKD), wherein the composition exhi...  
WO/2020/202704A1
[Problem] To provide a contamination preventing agent composition capable of effectively preventing pitch contamination in a dry part. [Solution] The present invention relates to a contamination preventing agent composition for preventin...  
WO/2020/198722A1
Cannabinoids can be separated or extracted from plant material. Versions can include a process for separating trichomes from plant material, including mixing plant material with a fluid in a metered feed system and forming a slurry; pump...  

Matches 101 - 150 out of 4,535