With Agitation Or Forced Circulation Patents (Class 162/57)
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Patent number: 11951655Abstract: A method of separating constituent layers from a paper-plastic laminate material includes disposing a sheet of a paper-plastic laminate material on a first surface. The paper-plastic laminate material includes a paper layer on a first side and a plastic layer on a second side. The method also includes moving an abrasive second surface over the paper layer on the first side to contact the paper layer and separate portions of the paper layer from the plastic layer. The method further includes collecting the separated portions of the paper layer and providing the separated portions of the paper layer as input to a paper recycling process, and collecting the plastic layer and providing the plastic layer as input to a plastic recycling process. The method may help increase recycling rates of paper and plastic, reduce raw material harvesting, reduce pollution and habitat destruction, and improve the quality of recycled material.Type: GrantFiled: July 30, 2022Date of Patent: April 9, 2024Inventor: Shreya Majumdar
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Patent number: 11944949Abstract: A solvent removing apparatus includes a container containing an emulsion comprising a first raw material of a continuous phase and a second raw material of a dispersed phase, an impeller rotating in the container to stir the emulsion, and a foam breaker spaced apart from the impeller on an upper portion of the impeller, positioned below a surface of the emulsion to be submerged in the emulsion when the emulsion is calm, and rotating to reduce foam generated during stirring of the emulsion.Type: GrantFiled: December 19, 2022Date of Patent: April 2, 2024Assignee: INVENTAGE LAB INC.Inventors: Sanghun Lee, Chan Hee Chon, Ju Hee Kim
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Patent number: 11891500Abstract: A composite resin molded article includes: a base resin; and fillers dispersed in the base resin, wherein the fillers include fibrous fillers and particulate fillers having aspect ratios lower than aspect ratios of the fibrous fillers.Type: GrantFiled: September 27, 2022Date of Patent: February 6, 2024Assignee: PANASONIC HOLDINGS CORPORATIONInventors: Masashi Hamabe, Toshifumi Nagino, Masayoshi Imanishi, Shouma Nishino
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Patent number: 11655588Abstract: The invention relates to a chip chute (4; 21; 31; 41) which comprises an elongated, open main body (22; 32; 42) having a rectangular transverse cross-section, and comprises further a transition portion (23; 33; 43), which connects to the elongated, open main body (22; 32; 42) and comprises a circular outlet (26; 36; 46). The invention relates further to a feeding system (1) for transporting comminuted lignocellulosic material from a vessel (2) to a pump (3) located below the vessel (2), wherein such a chip chute (4; 21; 31; 41) is arranged between the vessel (2) and the pum (3).Type: GrantFiled: April 4, 2018Date of Patent: May 23, 2023Assignee: VALMET ABInventors: Jonas Saetheråsen, Jerk Söderman, Robert Lavén, Bengt Wernersson Östberg
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Patent number: 10899847Abstract: The present disclosure generally relates to open chain modified cellulosic pulps and methods for making and using the same. More specifically, the open chain modified cellulosic pulps described herein may be made by oxidation of a cellulosic pulp, followed by reduction of the oxidized groups, resulting in a modified pulp having an improved open chain configuration that may be more efficiently converted into cellulosic derivative products. This disclosure further relates to improved cellulosic derivative products made therefrom, for example, cellulose esters, cellulose ethers, and regenerated cellulose products.Type: GrantFiled: November 30, 2016Date of Patent: January 26, 2021Assignee: GP Cellulose GMBHInventors: Arthur J. Nonni, James M. Keough, Charles E. Courchene, Harry R. Bartges, Blair R. Carter
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Patent number: 10570564Abstract: The method for preparing nanofibrillar cellulose comprises disintegrating (DIS1) fibrous cellulosic raw material to a first disintegration level to a half-fabricate, transporting (TRANS) the half-fabricate in the first disintegration level in concentrated form to a destination, and at the destination, disintegrating (DIS2) the half-fabricate from the first disintegration level to the second disintegration level to nanofibrillar cellulose.Type: GrantFiled: August 13, 2015Date of Patent: February 25, 2020Assignee: UPM-KYMMENE CORPORATIONInventors: Isko Kajanto, Markus Nuopponen, Juha Tamper
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Patent number: 10232326Abstract: An adhesive-air infuser comprises a hollow body through which adhesive and air flow. The air is directed into the hollow body at an upstream end of the hollow body through an air nozzle positioned within the hollow body, and the adhesive is directed into the hollow body at the upstream end of the hollow body such that the adhesive flows around at least a portion of the air nozzle as the adhesive flows through the hollow body. The adhesive and air are directed by adhesive supply pressure and air supply pressure to flow through the hollow body toward an output port. In various embodiments, adhesive and air flow along a tortuous path that causes the air to mix into the adhesive to form an adhesive-air solution having a density less than the adhesive supplied to the upstream end of the hollow body.Type: GrantFiled: November 19, 2015Date of Patent: March 19, 2019Assignee: Simchem Inc.Inventor: Raymond Columbus Simmons
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Patent number: 10052596Abstract: Aspects of the present disclosure provide various apparatus and methods. In some embodiments, an apparatus is provided for mixing a gas with a liquid. The apparatus may include a pipe having two ends. The pipe may provide a main fluid path and may have an interior surface having a first groove. The apparatus may also include a helical vane disposed inside the pipe. The vane may have a first projecting tongue that engages the first groove. The apparatus may also include a gas injection port on the pipe adapted to inject gas into the fluid path upstream of the helical vane. In some embodiments, the helical vane may be a 3D printed component.Type: GrantFiled: December 17, 2014Date of Patent: August 21, 2018Assignee: Gaia USA, Inc.Inventor: Thomas A. Richardson
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Patent number: 9951470Abstract: A pulp fiber with an enhanced carboxyl content resulting in improved antimicrobial, anti-yellowing and absorptive properties is described. Methods for making the kraft pulp fiber and products made from it are also described.Type: GrantFiled: March 12, 2014Date of Patent: April 24, 2018Assignee: GP Cellulose GmbHInventors: Arthur J. Nonni, Charles E. Courchene, Blair Roderick Carter
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Patent number: 9663385Abstract: The present invention relates to apparatuses, systems, and methods to cleanse water contaminated with hydrocarbons, hydraulic fracturing fluids, volatile organic compounds, sulfurous compounds, crude oil, and other petroleum products. The products recovered with the invention can be returned to the source, stored, transported, sold, or otherwise reused.Type: GrantFiled: April 30, 2014Date of Patent: May 30, 2017Inventor: John D Jones
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Patent number: 9371613Abstract: The present method is directed to an on-site process for conveying an emulsion of one or more substantially water-free fluids or compositions to a brownstock washing process. This enables real-time adjustment of wash aids and other process aids thus improving the overall operation of brownstock washing.Type: GrantFiled: January 21, 2015Date of Patent: June 21, 2016Assignee: Solenis Technologies, L.P.Inventors: Lloyd A Lobo, Todd S Bolton, Michael Mitchell, Kraig R Kent
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Patent number: 8974634Abstract: The present invention provides a novel production method of a cellulose nanofiber and a novel cellulose nanofiber. The method for producing a cellulose nanofiber comprises defibrating pulp by a single- or multi-screw kneader in the presence of water, the single or multi-screw kneader having a screw circumferential speed of 45 m/min. Or more.Type: GrantFiled: November 12, 2010Date of Patent: March 10, 2015Assignees: Nippon Paper Industries Co., Ltd., Oji Holdings Corporation, Mitsubishi Chemical Corporation, Kyoto UniversityInventors: Hiroyuki Yano, Tadafumi Hashimoto, Akihiro Sato
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Publication number: 20150034263Abstract: A method for fibrillation of cellulose includes the following steps: introducing fibre pulp of anionic cellulose at a consistency of 1 to 4% into a homogenizer, and homogenizing fibre pulp in the homogenizer at a pressure of 200 to 1000 bar, advantageously 300 to 650 bar, and by using 2 to 4 passes through for the same fibre pulp under these conditions, and after passes through, taking pulp from the homogenizer, which pulp has been fibrillated by homogenization to a degree than can be expressed as Brookfield viscosity exceeding 10,000 mPa.s (consistency 0.8%, 10 rpm).Type: ApplicationFiled: February 13, 2013Publication date: February 5, 2015Inventor: Markus Nuopponen
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Patent number: 8940132Abstract: The present invention relates to a process for the manufacture of structural hybrid thermoplastic composites where organic and inorganic fibers are well dispersed in a thermoplastic matrix. The process comprises defibrillating the organic fibers with or without the presence of surface active agents using a mixer at a high shear and at a temperature lower than the decomposition temperature of organic fibers and melting point of the surface active agents to separate the hydrogen bonded fibers and generate microfibers, followed by blending and dispersion of the organic fibers in the thermoplastic matrix to produce a fiber composite, followed by further blending and dispersion of the fiber composite with inorganic fibers at a low shear to get the moldable hybrid composite, followed by extrusion, injection or compression-injection molding. Low shear mixing maintains the inorganic fiber length.Type: GrantFiled: September 21, 2007Date of Patent: January 27, 2015Inventors: Mohini M. Sain, Suhara Panthapulakkal, Shiang F. Law
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Patent number: 8894811Abstract: A method of forming a dilute water slurry for water felting a basemat for an acoustical ceiling tile comprising delivering a bale of compressed mineral wool with a density of at least 8 lbs. per cubic foot at an unbaling station, releasing a binding holding the bale in compression, mechanically separating the fibers of a mineral wool bale with mechanical instrumentalities arranged to disperse the fibers to a generally uniform density of less than 2 lbs. per cubic foot prior to passage of the fibers through the tank inlet, and causing the separated mineral fibers to pass into the mixing tank for contact with water suspended binder.Type: GrantFiled: October 16, 2013Date of Patent: November 25, 2014Assignee: USG Interiors, LLCInventor: Martin W. Brown
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Patent number: 8894812Abstract: A fibrillated blend of lyocell and cellulosic pulp having a degree of polymerization of 200 to 1000 as measured by ASTM Test 1975-96, a method of making the blend and materials which incorporate the blend.Type: GrantFiled: July 20, 2012Date of Patent: November 25, 2014Assignee: Weyerhaeuser NR CompanyInventors: John A. Westland, Andrew J. Dodd, Mengkui Luo, Noriko Suzuki, S. Ananda Weerawarna
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Publication number: 20140284007Abstract: The invention relates to a method or methods of operating an apparatus for treating material by cutting, soaking and/or washing of the material, wherein the apparatus comprises a receptacle, a discharge element with a vortex generator and a pump arranged to pump fluid and material from the receptacle towards the vortex generator, wherein the vortex generator and the pump in combination are adapted to generate a vortex in the form of a conic helix in the fluid extending into the receptacle.Type: ApplicationFiled: May 15, 2014Publication date: September 25, 2014Applicant: Biogasol ApsInventors: Finn Beldring, Dragan Lukic
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Patent number: 8771472Abstract: The invention relates to an apparatus for treating material by cutting, soaking and/or washing of the material, wherein the apparatus comprises a receptacle, a discharge element with a vortex generator and pumping means arranged to pump fluid and material from the receptacle towards the vortex generator, wherein the vortex generator and pumping means in combination are adapted to generate a vortex in the form of a conic helix in the fluid extending into the receptacle.Type: GrantFiled: January 13, 2010Date of Patent: July 8, 2014Assignee: Biogasol ApSInventors: Finn Beldring, Dragan Lukic
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Patent number: 8721841Abstract: Pulper used in the paper industry that processes pulp which pulper comprises a pulper container (19), a punched plate screen (15) installed to the mentioned container, a binnacle (8) out of the lower part (3) of the container for the mass that has penetrated the punched plate screen (15) and a rotating mixing rotor located in the container (19) and equipped with wings (1); (5) the purpose of which mixing rotor is to defibrate paper and mix the mass in the container (19) and that the mixing rotor further comprises a cylinder part (20) directed downwards towards the punched plate screen (15) and that rotates along the mentioned rotor to which cylinder part wings (2) that clean the punched plate screen (15) are attached and which cylinder part (20) is located between the mixing rotor and the punched plate screen (15).Type: GrantFiled: May 19, 2010Date of Patent: May 13, 2014Assignee: Tampulping OyInventor: Jouko Hautala
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Patent number: 8617355Abstract: A method to treat a lignocellulosic material including: performing a steam explosion reaction on the lignocellulosic material and discharging a slurry from the; adding an alkali material to the slurry in a first conveyor; transferring the slurry with the alkali material from the first conveyor to a second conveyor; adding an enzyme solution to the slurry while in, entering or at the discharge of the second conveyor; transferring the slurry with the enzyme solution from the second conveyor slurry to a mixer; mixing the slurry in the mixer, wherein a second portion of the enzyme solution is added to the slurry during the mixing, and transferring the slurry with the enzyme solution from the mixer to a first reactor vessel wherein the slurry in the first reactor vessel undergoing enzymatic hydrolysis such that the viscosity of the slurry is reduced in the first reactor vessel.Type: GrantFiled: November 21, 2011Date of Patent: December 31, 2013Assignee: Andritz Inc.Inventors: Rodolfo Romero, Bertil Stromberg
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Publication number: 20130276999Abstract: A system and method of manufacturing a fiber for use in manufacturing products including providing a feedstock including fiber derived from edible fruit of a plant. An agent that degrades pectin may be applied to the feedstock to form a feedstock mixture. The feedstock mixture may be agitated, and solution including the fiber from the feedstock mixture may be removed. The fiber may be isolated from the solution.Type: ApplicationFiled: April 18, 2013Publication date: October 24, 2013Inventors: Peter R. Moss, Doug A. Bippert, Rajesh Kumar Garg, Kim W. Robinson, Simon Gainey, Philip G. Crandall
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Patent number: 8486338Abstract: A contactor for reacting a flow of gas with a liquid, comprises a vessel, a first chamber in the vessel and a second chamber in the vessel, the first and second chambers being linked only by a porous wall, and means for directing ultrasonic noise into at least one of the first and second chambers.Type: GrantFiled: December 3, 2012Date of Patent: July 16, 2013Assignee: Specialist Process Technologies LimitedInventors: Theodore E. Dickinson, David J. Parkinson, Kevin E. Collier
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Patent number: 8468714Abstract: The invention relates to a method for the simultaneous storage and drying of sewage sludge, comprising the following steps: a) mechanically dewatering the sewage sludge down to a dry substance concentration of 10 to 35 percent; b) applying the dewatered sewage sludge to a floor of a greenhouse-type drying hall in which a transparent building envelope forms the roof over the floor; c) drying the sewage sludge using solar radiation that radiates into the drying hall; d) mechanically dewatering additional sewage sludge down to a dry substance concentration of 10 to 35 percent; e) introducing the dewatered additional sewage sludge into the drying hall and mixing the additional sewage sludge with the sewage sludge already in the drying hall; f) drying said mixture using solar radiation that radiates into the drying hall; and g) evacuating the mixture from the drying hall or repeating steps d) to f), wherein in step e), the additional sewage sludge is mixed with the mixture in the drying hall rather than with the sType: GrantFiled: April 28, 2010Date of Patent: June 25, 2013Assignee: TSP GmbHInventors: Tilo Conrad, Steffen Ritterbusch, Markus Bux
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Publication number: 20120285640Abstract: A fibrillated blend of lyocell and cellulosic pulp having a degree of polymerization of 200 to 1000 as measured by ASTM Test 1975-96, a method of making the blend and materials which incorporate the blend.Type: ApplicationFiled: July 20, 2012Publication date: November 15, 2012Applicant: WEYERHAEUSER NR COMPANYInventors: John A. Westland, Andrew J. Dodd, Mengkui Luo, Noriko Suzuki, S. Ananda Weerawarna
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Publication number: 20120277351Abstract: The present invention provides a novel production method of a cellulose nanofiber and a novel cellulose nanofiber. A method for producing a cellulose nanofiber comprising defibrating pulp by a single- or multi-screw kneader in the presence of water, the single or multi-screw kneader having a screw circumferential speed of 45 m/min. or more.Type: ApplicationFiled: November 12, 2010Publication date: November 1, 2012Applicants: NIPPON PAPER INDUSTRIES CO., LTD., KYOTO UNIVERSITYInventors: Hiroyuki Yano, Tadafumi Hashimoto, Akihiro Sato
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Patent number: 8262853Abstract: According to one embodiment of the invention, a system for processing biomass includes a water-impermeable bottom liner, a gravel layer supported by the bottom liner, a drain pipe disposed within the gravel layer, a biomass input device operable to deliver biomass over the gravel layer to form a biomass pile, a lime input device operable to deliver lime to the biomass for pretreating the biomass, a distribution pipe elevated above the gravel layer, and a pump operable to circulate water through the biomass pile by delivering water to the distribution pipe and receiving water from the drain pipe after it has traveled through the biomass pile. According to another embodiment, a method for biomass pretreatment with alkali, conducted at ambient pressure for approximately 4-16 weeks at temperatures ranging from approximately 25° C. to 95° C. Biomass may be lignocellulosic biomass and may be rendered suitable for enzymatic digestion or pulp production.Type: GrantFiled: September 5, 2007Date of Patent: September 11, 2012Assignee: The Texas A&M University SystemInventors: Mark Thomas Holtzapple, Richard Read Davison, Lee Leon Lowery, Jr., Cesar Benigno Granda
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Patent number: 8262854Abstract: An improved method for treating lignocellulosic material, including a prehydrolysis-mass transfer process, which produces a concentrated hydrolysate volume during the time required for the hydrolysis itself. The improved process comprises the heating of the digester and chip content by direct steam to the required hydrolysis temperature, starting a flow of hot, stored hydrolysate to the top of the chip bed in order to create a trickle-bed type down-flow of hydrolysate, collecting a first fraction of the trickled-down hydrolysate as a product fraction, adding extraction liquid and continuing the trickle flow to collect a second hydrolysate fraction, which will be discharged from the digester to a hot hydrolysate storage tank to be used as the first trickle flow liquid in the next batch.Type: GrantFiled: January 26, 2007Date of Patent: September 11, 2012Assignee: Metso Paper, Inc.Inventors: Päivi Uusitalo, Panu Tikka
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Publication number: 20120037325Abstract: The invention relates to an apparatus for treating material by cutting, soaking and/or washing of the material, wherein the apparatus comprises a receptacle (10), a discharge element (20) with a vortex generator and pumping means (22) arranged to pump fluid and material from the receptacle (10) towards the vortex generator, wherein the vortex generator and pumping means (22) in combination are adapted to generate a vortex in the form of a conic helix in the fluid extending into the receptacle.Type: ApplicationFiled: January 13, 2010Publication date: February 16, 2012Applicant: BIOGASOL IPR APSInventors: Finn Beldring, Dragan Lukic
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Patent number: 8088254Abstract: Pulp processing equipment used to produce high-quality recycled pulp with little damage to fibers, high brightness and low residual ink by means of a force selectively acting on fiber surfaces during the process of recycling waste paper is disclosed. Moreover, fiber surfaces are modified by means of a force acting on only the fiber surfaces to obtain high-quality pulp and to render harmless dirts deteriorating pulp quality. A jet system is provided having one or more nozzles for jetting an aqueous slurry containing a material comprising cellulose into a vessel.Type: GrantFiled: February 19, 2010Date of Patent: January 3, 2012Assignee: Nippon Paper Industries Co., Ltd.Inventors: Shisei Goto, Keigo Watanabe, Hiromichi Tsuji, Takanori Miyanishi
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Patent number: 8025761Abstract: Method for supplying fibrous suspension to at least one headbox that includes degassing a diluting liquid via rotation of a rotor of a degassing device to apply centrifugal forces to the diluting liquid, guiding the degassed diluting liquid out of the degassing device into a separate diluting water pump, and mixing at least a portion of the degassed diluting liquid with a high-consistency suspension to form the fibrous suspension.Type: GrantFiled: September 9, 2010Date of Patent: September 27, 2011Assignee: Voith Patent GmbHInventors: Axel Gommel, Erwin Binder
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Publication number: 20110056636Abstract: Method for supplying fibrous suspension to at least one headbox that includes degassing a diluting liquid via rotation of a rotor of a degassing device to apply centrifugal forces to the diluting liquid, guiding the degassed diluting liquid out of the degassing device into a separate diluting water pump, and mixing at least a portion of the degassed diluting liquid with a high-consistency suspension to form the fibrous suspensionType: ApplicationFiled: September 9, 2010Publication date: March 10, 2011Applicant: VOITH PATENT GMBHInventors: Axel GOMMEL, Erwin BINDER
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Publication number: 20100288456Abstract: A fibrillated blend of lyocell and cellulosic pulp having a degree of polymerization of 200 to 1000 as measured by ASTM Test 1975-96, a method of making the blend and materials which incorporate the blend.Type: ApplicationFiled: May 14, 2009Publication date: November 18, 2010Applicant: WEYERHAEUSER NR COMPANYInventors: John A. Westland, Andrew J. Dodd, Mengkui Luo, Noriko Suzuki, S. Ananda Weerawarna
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Patent number: 7641767Abstract: An apparatus and method serves, e.g., to deaerate, clean or screen a fibrous suspension and is provided with a closed housing and a rotor arranged centrally therein. The rotor puts at least a part of the fibrous suspension guided into the housing into a rotational flow. The fibrous suspension flowing into the housing through the inlet is put into rotation by a guide element acting hydraulically. This increase the efficiency of the apparatus and prevents disturbing turbulences in the apparatus.Type: GrantFiled: July 31, 2006Date of Patent: January 5, 2010Assignee: Voith Patent GmbHInventors: Erwin Binder, Axel Gommel, Anton Selbherr
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Publication number: 20090314442Abstract: The present invention relates to a process for the manufacture of structural hybrid thermoplastic composites where organic and inorganic fibres are well dispersed in a thermoplastic matrix. The process comprises defibrillating the organic fibres with or without the presence of surface active agents using a mixer at a high shear and at a temperature lower than the decomposition temperature of organic fibres and melting point of the surface active agents to separate the hydrogen bonded fibres and generate microfibres, followed by blending and dispersion of the organic fibres in the thermoplastic matrix to produce a fibre composite, followed by further blending and dispersion of the fibre composite with inorganic fibres at a low shear to get the moldable hybrid composite, followed by extrusion, injection or compression-injection molding. Low shear mixing maintains the inorganic fibre length.Type: ApplicationFiled: September 21, 2007Publication date: December 24, 2009Inventors: Mohini M. Sain, Suhara Panthapulakkal, Shiang F. Law
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Patent number: 7622018Abstract: An arrangement for and a method of treating pulp, and a method of modernizing a pulp tower are disclosed. The arrangement and method relate to treating pulp in connection with high-consistency pulp towers, and especially to means (36, 42) for diluting pulp arranged substantially at the level of the smallest cross-sectional area between the parting member (31) and the wall (12) of the pulp tower (10).Type: GrantFiled: January 19, 2004Date of Patent: November 24, 2009Assignee: Sulzer Pumpen AGInventor: Juha Ottelin
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Publication number: 20090218054Abstract: A building material for use in forming exterior surface coverings. According to a preferred embodiment, the building material consists of the combination of a paper material, bonding agent, and water. The building material can either be formed directly upon a substrate, such as a wall or ceiling, or otherwise formed as a sheet of material or molding that can thereafter be affixed to a given surface or substrate. The building materials can be customized to have a specific type of color, shape and texture, and can further be utilized in a wide variety of building applications.Type: ApplicationFiled: May 14, 2009Publication date: September 3, 2009Inventors: ERIC ROSEN, Joel Stearns
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Publication number: 20090205794Abstract: A method for the production of a tissue paper web, which is produced from a pulp suspension comprised of fibers, the pulp suspension having a refining degree of less than 21°SR and being of such condition that it is possible to produce from said pulp suspension a laboratory sheet according to TAPPI 205 SP 95 (Rapid Köthen) whose breaking length measured according to TAPPI 220 and TAPPI 494 at least a specific refining degree (RDspecific) is greater than or equal to the value resulting from 0.55 (km/SR)*(RDspecific?10°SR), whereby the specific refining degree is selected from a refining range from 15°SR to less than 21°SR, in particular 15°SR to 19°SR.Type: ApplicationFiled: April 24, 2009Publication date: August 20, 2009Inventors: Thomas Scherb, Luiz Carlos Silva, Rogerio Berardi, Dailo Oyakawa
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Patent number: 7569120Abstract: The method is for converting a vertically standing up-flow tower by inserting a freely insertable pipe into the conical part of the up-flow tower the tower is converted to a down-flow tower where the tower can easily be restored to the up-flow tower and optimized with regards to a minimized stagnation volume in the tower. The upper open end of the pipe is disposed at a first distance (A) from the lower part of the conical inlet part. The first distance (A) is less than the total vertical extension (B) of the conical inlet part. The cellulose pulp establishes a self-forming stagnation zone around the pipe at a lower part of the down-flow tower.Type: GrantFiled: December 12, 2005Date of Patent: August 4, 2009Assignee: GLV Fiance Hungary Kft.Inventors: Jonas Bjorkstrom, Ulf Jansson
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Patent number: 7566380Abstract: The arrangement concerns an improved design for at least one of the cooling, dilution and washing at the bottom of a continuous digester for the production of cellulose pulp. By arranging at least one extra strainer section above the lowermost strainer section, with the addition of washing fluid or dilution fluid between the extra strainer section and the lowermost strainer section, more washing fluid can be added at the bottom of the digester without counteracting the flow of the column of chips. This provides space for the increase of production, for improvement of the flow of the column of chips, or for combinations of these effects while retaining good cooling, washing and dilution at the bottom of the digester.Type: GrantFiled: December 3, 2008Date of Patent: July 28, 2009Inventors: Vidar Snekkenes, Anders Samuelsson
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Publication number: 20090078383Abstract: The invention concerns a process for making a fibrillated polypyridobisimidazole floc comprising the steps of: cutting polypyridobisimidazole filaments to an average cut length of from about 0.5 to 10 mm; and applying energy to the polypyridobisimidazole filaments to produce a fibrillated floc having essentially the same average cut length after the application of energy as before the application of energy; where the fibrillated floc having a Canadian Standard Freeness (CSF), when dispersed in water by itself, of from about 400 to 750 ml.Type: ApplicationFiled: December 19, 2006Publication date: March 26, 2009Inventors: Mikhail R. Levit, Achim Amma, Edmund A. Merriman
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Publication number: 20090047497Abstract: There are provided a method for manufacturing various products needed in an actual life which may be implemented in combination with a refiner for refining plants by a mechanical method, a method for refining plants, a molding mixture which is made by mixing refined fiber, clay and water and molds and dries as an interior decorative material for architecture, a heat keeping, adiabatic, sound proof, fireproof board, brick and block, a decorative design (cement mortar) mixture, a fiber having an enhanced tensional force, a cement board which has an architecture interior and exterior heat keeping, adiabatic, soundproof, fireproof functions manufactured by mixing cement and water, a cement material, a fiber board manufactured by mixing fiber and adhesive material, paper made of fiber, thread woven with fiber, and a fiber heat keeping material made of fiber.Type: ApplicationFiled: March 9, 2007Publication date: February 19, 2009Inventor: Chan-Oh Park
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Publication number: 20080271861Abstract: The method is for the improved oxygen delignification of cellulose pulp with a medium consistency of 8-16%. The fraction of dissolved oxygen can be maintained at a high level throughout the process by the use of high pressure, greater than 15.0 bar, and by repeated agitative mixing while maintaining the high pressure. A fraction just over 20% of the total oxygen added is dissolved in the fluid phase such that the amount of oxygen in the fluid phase is maintained at a high level throughout the complete high-pressure section. This means that the amount of oxygen that is dissolved in the fluid phase and that penetrates the cellulose fibers can be maintained at an optimal high level throughout the process for improved delignification of the cellulose.Type: ApplicationFiled: September 5, 2005Publication date: November 6, 2008Inventors: Vidar Snekkenes, Jonas Saetherasen, Lennart Gustavsson, Martin Ragnar
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Patent number: 7396434Abstract: A continuous and batch system to produce cellulose, native lignin and unicellular protein from any form of vegetation in a closed process. The biomass is mixed in the impregnate solution of nitric acid and/or ammonium hydroxide and water. After a period of time at room temperature and atmospheric pressure the chemical solution is recycled. The biomass is moved to the reactor and heated. Evaporated impregnate is recovered via absorption tower and recycled back to chemical solution. The biomass is moved to an alkaline solution, then cooled to separate pulp from black liquor. The black liquor is pumped to a separation tank and is treated to precipitate lignin. The solution is filtered to separate sweet liquor and lignin. The lignin is dried and the sweet liquor is fermented to produce unicellular protein.Type: GrantFiled: June 3, 2004Date of Patent: July 8, 2008Inventors: Jose Antonio Rodriguez Rivera, Kelly Anthony O'Flynn
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Patent number: 7390378Abstract: A method of providing papermaking fibers with durable curl comprising: a) introducing papermaking fiber into a rotatable drum adapted for operation at elevated pressure; b) rotating the drum containing the papermaking fiber while maintaining: i) the fiber in aqueous dispersion having a consistency of from about 5 to about 45 percent; ii) a temperature of above about 100° C.; the drum being configured such that the aqueous fiber dispersion contacts the rotating wall of the drum during rotation thereof and the mechanical action of the drum on the dispersion provides a durable curl to the papermaking fiber; removing the curled fiber from the rotatable drum wherein the temperature, time, consistency and energy input to the fiber are controlled such that fibers treated exhibit a curl elevation of at least 50 percent at 1 hour storage time.Type: GrantFiled: July 16, 2004Date of Patent: June 24, 2008Assignee: Georgia-Pacific Consumer Products LPInventors: Jeffrey R. Carels, Robert L. de Jong, Daniel W. Sumnicht, Jeffrey A. Lee
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Patent number: 7364638Abstract: The present invention is directed to a process for the hot dispersing of a paper fiber stock that includes providing an aqueous paper fiber stock and pressing the aqueous fiber stock in a thickening device. In this manner, water is at least partially removed from the aqueous fiber stock to form a highly consistent paper fiber stock. The process further includes heating the highly consistent paper fiber stock, dispersing the heated highly consistent paper fiber stock with a disperser, determining a thermal energy consumed to heat the highly consistent paper fiber stock, and controlling a dewatering effect of the thickening device. The dewatering effect is increased with rising thermal energy consumption and is reduced with a falling thermal energy consumption. The instant abstract is neither intended to define the invention disclosed in this specification nor intended to limit the scope of the invention in any way.Type: GrantFiled: May 2, 2003Date of Patent: April 29, 2008Assignee: Voith Paper Patent GmbHInventors: Pal B. Bendiksen, Axel Gommel, Volker Niggl
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Patent number: 7364639Abstract: A method of forming twisted, curly fibers from a wet wood pulp without the aid of a wet fluffing process or a chemical cross-linker. The method includes forming the wet wood pulp into fiber bundles and subsequently thermally drying the fiber bundles. The invention also includes curly fibers derived from the method of the invention.Type: GrantFiled: August 29, 2005Date of Patent: April 29, 2008Assignee: Kimberly-Clark Worldwide, Inc.Inventors: Sheng-Hsin Hu, Young Chan Ko
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Patent number: 7291244Abstract: Methods for conveying, mixing, leveling, and flaking dewatered pulp to produce pulp flakes suitable to be used in a dryer. Methods for producing a consistent flow rate of pulp, and, for producing uniform pulp flakes in terms of pulp flake size and pulp flake moisture content. A method includes introducing a dewatered pulp to a rotating shaftless screw conveyor. The pulp is deposited from the screw conveyor onto a moving belt conveyor through a chute. The pulp is leveled with a rotary doctor located above the belt conveyor to produce a substantially even rate of mass flow of pulp along a length of belt conveyor. Uniform and consistent quantities of pulp per unit time can then be fed from the belt conveyor to a pulp flaker that then translates into an even rate of pulp mass flow to the dryer.Type: GrantFiled: September 29, 2003Date of Patent: November 6, 2007Assignee: Weyerhaeuser CompanyInventors: Ramon C. DeZutter, Christopher Q. Tveter
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Patent number: 7282114Abstract: The object of the invention is a method and a device for dispersing pulp, especially pulp containing waste paper, in which method ground pulp mass is fed between the blade surfaces (4) of a dispersing device that are brought in a rotating movement in relation to one another. The invention is characterized in that the dispersing event takes place in a narrow opening (5) between the conical surfaces (3) at the outlet end (6) of which there is arranged a running wheel (7) acting as pump by which the pulp is pumped out of the dispersing device by centrifugal force. The inner cone of the dispersing device may act as rotor and the outer cone may act as stator. In addition, the pulp may be diluted at the outlet end of the blade opening (5) with fluid introduced to the intake side of the running wheel (7).Type: GrantFiled: September 21, 2000Date of Patent: October 16, 2007Assignee: Metso Paper, Inc.Inventor: Veikko Kankaanpää
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Patent number: 7279073Abstract: An apparatus for treating fibrous material is disclosed. The apparatus may include a fiber separator, a de-liquefier, a dry-to-wet blender and a flash dryer. The fiber separator may be a liquid-based fiber separator. The de-liquefier is for removing liquid from the fibrous material. The blender downstream, which may be a dry-to-wet blender, is for adding a dry material to the de-liquefied fibrous material. The de-liquefier and a dry-to-wet blender are downstream from the fiber separator and the dry-to-wet blender may be downstream from the de-liquefier. The flash dryer, which is even further downstream, is for drying the treated fibrous material.Type: GrantFiled: August 13, 2002Date of Patent: October 9, 2007Assignee: U.S. Greenfiber, LLCInventors: David James Bowman, Thomas Reginald Eason, Jr., John Walter Renz
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Patent number: 7156952Abstract: The invention relates to a method and arrangement for alkaline oxygen delignification of cellulose pulp. By adding alkali in the final phase of the oxygen delignification one can ensure that an optimal predetermined end-pH is obtained. This provides advantages in the subsequent bleaching since the bleachability is substantially improved in the form of reduced need for bleaching chemicals.Type: GrantFiled: September 13, 2004Date of Patent: January 2, 2007Assignee: Kvaerner Pulping ABInventor: Martin Ragnar