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公开(公告)号：WO2022189408A1
公开(公告)日：2022-09-15
申请号：PCT/EP2022/055842
申请日：2022-03-08
Applicant: TRIFILON AB
Inventor： LIDSTRAND, Martin
IPC: D21C3/00 , D21C7/00 , D21C7/14 , D21C9/10 , D21C1/02 , C08J5/04 , D21C3/02 , D21C5/00 , D21C9/02 , D21C9/16
Abstract: An apparatus for delignification and bleaching of fibres, comprises: a reactor for containing a bed comprising fibres; and a moveable head box for dispensing liquid into the reactor; wherein the head box is configured to rest on the bed of fibres.
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公开(公告)号：WO2022154712A1
公开(公告)日：2022-07-21
申请号：PCT/SE2021/051303
申请日：2021-12-22
Applicant: VALMET AB
Inventor： LUNDBERG, Jörgen , LUNDBERG, Jonas , TRÄFF, Henrik
IPC: B01F23/231 , B01F25/314 , D21C9/10
Abstract: A mixing device (1a-1f) for performing mixing of a fluid (2) into a fiber pulp (3) in a fiber pulp arrangement (5a-5f), said mixing device (1a-1f) comprising: - a fluid inlet (7) configured to be connected to a fluid source (9) for providing fluid (2) into the mixing device (1a-1f); and5 - at least one fluid outflow part (11a-11f) which is in fluid connection with said fluid inlet (7) and which comprises a porous metallic material (12) produced by additive manufacturing, wherein said fluid outflow part (11a-11f) is positioned in relation to said fiber pulp arrangement (5a-5f) such that fluid (2) delivered out via the fluid outflow part (11a-11f) will be dispersed through the porous metallic material (12) 10 and enter into the fiber pulp (3), wherein said porous metallic material (12) of said at least one fluid outflow part (11a-11f) has a degree of porosity which is varying over a surface of the fluid outflow part.
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公开(公告)号：WO2021255335A1
公开(公告)日：2021-12-23
申请号：PCT/FI2021/050441
申请日：2021-06-14
Applicant: KEMIRA OYJ
Inventor： ROBERTSEN, Leif , KONN, Jonas
Abstract: The invention relates to a method for pitch control and/or removal during bleaching of cellulosic fibres. Cellulosic fibres are obtained from a pulping process and formed into an aqueous cellulosic fibre suspension, and bleaching of the cellulosic fibre suspension is performed in a bleaching process comprising at least one acidic stage, where pH of the cellulosic fibre suspension is
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公开(公告)号：WO2021213740A1
公开(公告)日：2021-10-28
申请号：PCT/EP2021/056877
申请日：2021-03-17
Applicant: MESSER AUSTRIA GMBH
Inventor： THALLER, Bernhard
Abstract: Bei einem Verfahren bzw. einer Vorrichtung zur Herstellung von gebleichtem Zellstoff, bei dem eine Lignin und Zellstoff enthaltende Suspension wenigstens einem Verfahrensschritt zur sauerstoffunterstützten Bleiche in einem Reaktor unterzogen wird, wie der alkalischen Sauerstoffdelignifizierung, der sauerstoffverstärkten Extraktion oder der sauerstoffverstärkten Peroxidbleiche, wird erfindungsgemäß vorgeschlagen, dass der für die sauerstoffunterstützte Bleiche erforderliche Sauerstoff dem Reaktor zumindest teilweise in Form von Sauerstoff enthaltenden Nanobubbles zugeführt wird. Die geringe Größe und hohe Stabilität der Nanobläschen ermöglichen eine gleichmäßige Verteilung des Sauerstoffs in der Suspension und eine vergleichsweise lange Einwirkungszeit. Die Effizienz der Bleiche wird auf diese Weise wesentlich erhöht.
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公开(公告)号：WO2021006798A1
公开(公告)日：2021-01-14
申请号：PCT/SE2020/050699
申请日：2020-07-02
Applicant: KIRAM AB
Inventor： STIGSSON, Lars
Abstract: 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 bleaching step, and/or an acidic pulp treatment step of a kraft or sulfite pulp mill fiberline. Spent chemicals, effluents and/or organic residues from co-processing cellulosic pulps, textile pulp pre-treatment steps, pulp washing steps, pulp bleaching or pulp acidic treatment steps are recycled to the pulp mill chemicals recovery cycle and /or to the secondary effluent treatment plant.
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Patent Agency Ranking
公开(公告)号：WO2020152178A1
公开(公告)日：2020-07-30
申请号：PCT/EP2020/051429
申请日：2020-01-21
Applicant: JENA TRADING APS
Inventor： VINTHER, Per , LAWTHER, John, Mark
Abstract: The present invention provides a method of producing an improved cellulose pulp consisting of cellulose fibers of a desired length, such as cellulose fibers having a length-weighted average fiber length Lc(l) > 0.6 mm and its use in cellulose pulp-comprising products, such as packaging material with improved properties.
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公开(公告)号：WO2020109667A1
公开(公告)日：2020-06-04
申请号：PCT/FI2019/050853
申请日：2019-11-28
Applicant: ANDRITZ OY
Inventor： GEIGER, Ronny , PELTONEN, Kari
Abstract: The present invention relates to an arrangement and a method for controlling a gas flow separated from a suspension of medium consistency pulp. The pulp is treated in a pulp treatment apparatus comprising at least a first pump and a second pump, wherein the second pump is a degassing centrifugal pump provided with a degassing system which comprises - a degassing conduit in which a degassing valve is arranged for regulating a pressure difference between an inlet of the second pump and the degassing conduit. The degassing system further comprises a pressurized degassing vessel working under overpressure and having an inlet and an outlet, wherein the outlet of the vessel is connected to a pressure control valve for maintaining a desired overpressure in the vessel.
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公开(公告)号：WO2020109488A1
公开(公告)日：2020-06-04
申请号：PCT/EP2019/082946
申请日：2019-11-28
Applicant: UNIVERSITÄT FÜR BODENKULTUR WIEN
Inventor： GÜBITZ, Georg , PELLIS, Alessandro , HASKE-CORNELIUS, Oskar
Abstract: The present invention relates to a method for covalently binding at least one amino acid, at least one peptide and/or at least one polypeptide to a cellulosic material comprising cellulose and/or cellulose derivatives comprising free hydroxyl groups comprising the steps of a) subjecting the cellulosic material to an aqueous solution, ionic liquids, deep eutectic solvents, organic solvents or mixtures, comprising at least one oxidizing agent and b) binding said at least one amino acid, at least one peptide and/or at least one polypeptide to said cellulosic material.
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9.发明申请
公开(公告)号：WO2020096854A1
公开(公告)日：2020-05-14
申请号：PCT/US2019/059092
申请日：2019-10-31
Applicant: THE UNIVERSITY OF CHICAGO
Inventor： ROWAN, Stuart J. , YANG, Han
Abstract: A process for the isolation of cellulose nanofibers, in particular carboxylic acid functionalized cellulose nanofibers (MxG-CNF-CO2H) from the sustainable grass hybrid Miscanthus x. Giganteus (MxG). The process includes the steps of performing bleach treatment on a quantity of MxG followed by ammonium persulfate oxidation. The resulting MxG-CNF-CO2Hs have good dispersibility in aqueous and polar organic solvents. They are also able to form gels at relatively low concentrations. The MxG-CNF-CO2H show significantly higher reinforcement effect when compared to carboxylic acid functionalized cellulose nanocrystals at the same weight percent in a composite composition.
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公开(公告)号：WO2019170962A1
公开(公告)日：2019-09-12
申请号：PCT/FI2019/050176
申请日：2019-03-06
Applicant: ANDRITZ OY
Inventor： KETTUNEN, Auvo , LAAKSO, Sampsa , HAATAINEN, Tiina , PAANANEN, Markus
Abstract: The present invention relates to a process for producing dissolving pulp from comminuted wood-based fibrous material. The process comprises the following consecutive stages: cooking comminuted fibrous material with alkaline cooking liquor in a kraft cooking process to produce pulp; treating the cooked pulp in caustic extraction at a temperature of 70-110 °C and in an effective alkali concentration of 60-120 g/l for at least 5 minutes, and washing and oxygen delignifying the caustic extracted pulp.
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