Reclamation, Salvage Or Reuse Of Materials Patents (Class 162/189)
  • Patent number: 7083703
    Abstract: A filler comprising cellulose or lignocellulose fibrils on which light-scattering material particles have been deposited, and a process for the manufacture thereof. In the filler according to the invention, an alkyl derivative of cellulose, such as CMC, has been sorbed to the fibrils. Such a filler can be prepared from a source material containing cellulose or lignocellulose fibrils by first forming a fibril suspension, into which there are fed source materials forming an inorganic or organic salt that, when precipitating, forms a light-scattering pigment. The filler according to the invention has very good strength properties; in particular, good bond strength is achieved by means of it. The concentration of mineral pigment in paper can be increased and, furthermore, the grammage of paper can be lowered without the other important properties of the paper deteriorating.
    Type: Grant
    Filed: April 24, 2002
    Date of Patent: August 1, 2006
    Assignee: M-real Oyj
    Inventors: Outi Aho, Petri Silenius, Maija Pitkänen, Soili Hietanen
  • Patent number: 7029553
    Abstract: The present invention relates to the use of urea sulfate or urea hydrochloride, or both, in process streams in the paper and pulping industries to control pH, to bring about flocculation or precipitation of various materials, and to replace all or part of the sulfuric acid, hydrochloric acid, and/or papermaking alum used in the paper and pulping industries.
    Type: Grant
    Filed: February 22, 1999
    Date of Patent: April 18, 2006
    Assignee: Peach State Labs, Inc.
    Inventors: Michael S. Williams, R. Richard Sargent
  • Patent number: 7011729
    Abstract: The invention relates to a starch and fiber mixture, and the application of a starch and fiber mixture in paper manufacturing. The starch and fiber mixture is applied to a paper mat, after the paper mat is formed. The starch and fiber mixture may be obtained by the selective filtering of white water from the papermaking process, particularly by use of a pressure screen.
    Type: Grant
    Filed: November 12, 2003
    Date of Patent: March 14, 2006
    Assignee: Corn Products International, Inc.
    Inventors: Philip Strong, Brian Edward Ireland, John Gregory Kinney
  • Patent number: 6953516
    Abstract: The energy efficiency of a throughdrying papermaking process is improved by recycling exhaust gas from one or more throughdryers prior to throughdrying to profile the consistency of the web.
    Type: Grant
    Filed: January 16, 2004
    Date of Patent: October 11, 2005
    Assignee: Kimberly-Clark Worldwide, Inc.
    Inventors: Michael Alan Hermans, Frank Stephen Hada
  • Patent number: 6869506
    Abstract: An apparatus for decreasing heat emission and enhancing a vacuum system in a papermaking machine is provided. Such an apparatus includes a drying device having an inlet for receiving heated air for removing moisture from a paper web and an outlet for exhausting the moisture-containing air from the drying device. A vacuum system is configured to produce a suction and receive the moisture-containing air. A web handling device is disposed upstream of the drying device and is configured to interact with the web before the web is directed to the drying device. The web handling device is further configured to receive a portion of the moisture-containing air from the drying device, wherein the portion of the moisture-containing air is directed through the web by the web handling device to facilitate dewatering of the web before the moisture-containing air is received by the vacuum system.
    Type: Grant
    Filed: November 22, 2002
    Date of Patent: March 22, 2005
    Assignee: Metso Paper Karlstad Aktiebolag (AB)
    Inventor: Dennis Edward Jewitt
  • Patent number: 6843886
    Abstract: A method and device for processing sewage which contains coating paste from a paper or board mill with a device operating on the principle of a double action impact mill. The device includes a first rotor (11) equipped with blades; a second rotor (12) concentric with the first rotor, equipped with blades and arranged to rotate in a direction opposite to the direction of the first rotor, or a stator concentric with the first rotor and equipped with blades. The sewage is led to a feed opening (14) which opens out to the nave of rotors (11, 12) or to the nave of the rotor and the stator. In the device, the material flow is brought to flow as a flow-off through the blades of the rotors (11, 12) arranged within each other, or of the rotor and the stator arranged within each other.
    Type: Grant
    Filed: November 24, 2000
    Date of Patent: January 18, 2005
    Assignee: Megatrex Oy
    Inventors: Mauno Huovinen, Hannu Virtanen
  • Patent number: 6835282
    Abstract: Disclosed is a process for preparing a paper web. The paper web is prepared from a low-grade furnish, which contains low-grade pulps, such as recycled pulp and/or groundwood pulp, and which, in one preferred embodiment, is a newsprint furnish. In accordance with the disclosed process, a pre-flocculated filler is added to the furnish prior to forming the paper web from the furnish. Filler will be retained in the web, and retention of undesired components of the furnish in the web will be reduced as compared with newsprint in which a filler is incorporated via conventional processes. Another embodiment contemplates the incorporation of a pre-flocculated coated broke slurry into a paper furnish prior to paper formation. The paper web formed via the process of the invention will have improved properties as a result of the incorporation of the pre-flocculated filler or treated broke into the web.
    Type: Grant
    Filed: January 4, 2002
    Date of Patent: December 28, 2004
    Assignee: Grain Processing Corporation
    Inventors: Richard D. Harvey, Stuart W. Mabee, James M. Crandall
  • Publication number: 20040256071
    Abstract: Method and apparatus for producing fibre pulp and fuel out of municipal waste or for producing fibre pulp out of waste paper. To control the microbe content, the retention time of the process is kept shorter than 12 hours, advantageously shorter than 6 hours. This is achieved by minimizing the total liquid volume of the process and by increasing the amount of water being passed to water treatment from the process, which water, having been purified, is possibly returned to the process. The method may also include a phase in which the pulp is treated thermally in order to destroy the microbes present in it.
    Type: Application
    Filed: March 17, 2004
    Publication date: December 23, 2004
    Inventors: Markku Huhtamaki, Kai Sipila, Jouko Hautala
  • Patent number: 6830696
    Abstract: A method of treating spent alkaline pulping liquor (black liquor) includes the steps of providing black liquor containing lignin, and acidulating a phosphate containing material, wherein phosphoric acid is generated by the acidulating step. The black liquor is mixed with phosphoric acid from the acidulated phosphate containing material, wherein lignin is separated and clarified liquor results. The method can include the step of adding a water soluble, surface active, polymeric, coagulant agent to the black liquor before mixing with the phosphoric acid from the phosphate containing material. The clarified liquor comprises anion species including phosphate.
    Type: Grant
    Filed: December 1, 2003
    Date of Patent: December 14, 2004
    Assignee: University of Florida Research Foundation, Inc.
    Inventors: Hassan E. El-Shall, El-Sayed A. Abdel-Aal
  • Patent number: 6827820
    Abstract: The invention relates to a degassing centrifugal apparatus such as a pump and to a process for pumping and degassing a fluid. The apparatus has a rotatable hollow rotor connected to a stationary fluid inlet at one end and a stationary liquid outlet at the opposite end and a gas exhaust in the center thereof. The rotor has at its inlet end a bladed wheel with arcuate blades. The bladed wheel accelerates a fluid flow in said rotor inlet end and causes the fluid to rotate at a peripherical velocity higher than the peripherical velocity of said rotor inlet end. The apparatus is especially useful for pumping and degassing backwater in the production of paper or board in a paper machine.
    Type: Grant
    Filed: April 17, 2002
    Date of Patent: December 7, 2004
    Assignee: POM Technology Oy AB
    Inventor: Paul Meinander
  • Publication number: 20040168783
    Abstract: The present invention relates to a process for recycling cleaner rejects from the preparation of paper, paperboard and cardboard and to their use for the preparation of paper in the paper stock or as a coating slurry for the paper industry.
    Type: Application
    Filed: March 25, 2004
    Publication date: September 2, 2004
    Inventor: Dieter Munchow
  • Publication number: 20040149413
    Abstract: A blade (20) for wiping water from a grooved sleeve (26) mounted on a press roll (14) in a paper making machine is adjustably mounted on the machine for movement toward and away from the sleeve (26). The wiper blade (20) is positionable against the surface of the sleeve (26) to wipe water therefrom adjacent and upstream from the nip between the sleeve (26) and a mating press roll (12).
    Type: Application
    Filed: January 31, 2003
    Publication date: August 5, 2004
    Inventor: Robert Bradley Watson
  • Publication number: 20040118542
    Abstract: The invention relates to a method for producing a sheet of paper (6) comprising paper fibres and calcium carbonate mainly in the form of calcite crystals linked directly to the paper fibres.
    Type: Application
    Filed: January 20, 2004
    Publication date: June 24, 2004
    Inventor: Christian Richard
  • Patent number: 6752903
    Abstract: Separation of dissolved and colloidal high molecular weight organic by-products from liquors or filtrates in a cellulosic pulping process through a filtration media to improve the overall efficiency of the process.
    Type: Grant
    Filed: July 27, 2001
    Date of Patent: June 22, 2004
    Inventor: Craig A. Bianchini
  • Patent number: 6740201
    Abstract: Water hydraulics are used in a paper or board machine, in particular in applications requiring lubrication and in the like in which an operating medium is subjected to pressure. A chemical which is used in the stock system (A) of the process is mixed with the water used in water hydraulics before the water is passed to a site of application (5) in order to raise the viscosity of the water and chemical mixture to a level required by the site of application (5). The water and chemical mixture is passed (3in) after that to the site of application (5) and circulated through the same at least once, after which said water and chemical mixture is recovered (2) and passed to the stock system (A) of the process as diluted to a suitable concentration.
    Type: Grant
    Filed: August 23, 2002
    Date of Patent: May 25, 2004
    Assignee: Metso Paper, Inc.
    Inventors: Kari Holopainen, Juha Kinnunen
  • Patent number: 6733629
    Abstract: The present invention relates to a method and apparatus for controlling the operation of an approach system of a paper machine or the like web formation apparatus. Especially preferably the method of controlling the operation of an approach system according to the invention is applicable to be used in connection with paper and paperboard machines as well as in connection with various apparatuses performing non-woven webformating.
    Type: Grant
    Filed: February 15, 2002
    Date of Patent: May 11, 2004
    Assignee: Andritz Oy
    Inventor: Jouni Matula
  • Patent number: 6723205
    Abstract: The invention relates to a degassing centrifugal apparatus such as a pump having energy recovery means and to a process for degassing a fluid. The apparatus has a rotatable hollow rotor connected to a fluid inlet at one end and a liquid outlet at the opposite end. A gas exhaust is connected to the center of the apparatus. The apparatus has at its inlet end means for bringing a fluid to rotate on the inner wall of said rotor. The apparatus comprises a turbine at its outlet end recovering excess dynamic energy from the rotating fluid. The apparatus is especially useful for centrifugal degassing of backwater in the production of paper or board machine.
    Type: Grant
    Filed: April 17, 2002
    Date of Patent: April 20, 2004
    Assignee: FOM Technology Oy AB
    Inventor: Paul Meinander
  • Patent number: 6709550
    Abstract: A multi-layered paper web that has increased strength for minimizing slough and lint is provided. In one embodiment, the paper web contains an outer layer formed from unrefined hardwood fibers and an inner layer formed from refined hardwood, softwood, and machine broke fibers. During formation within a headbox, the outer and inner fibrous layers are allowed to partially blend. By partially blending the layers, the fibers within each layer can form bonds in the −z direction to provide sufficient strength to minimize lint and slough.
    Type: Grant
    Filed: August 22, 2002
    Date of Patent: March 23, 2004
    Assignee: Kimberly-Clark Worldwide, Inc.
    Inventors: Jeffrey D. Holz, Thomas G. Neal, Jr., Robert E. Donnelly, Michelle Nault, Devany H. Martin
  • Publication number: 20040050519
    Abstract: The present invention relates to a method for removing water from a movable roll jacket surface in a wet section of a paper-making machine, which roll jacket surface preferably belongs to a flexible roll jacket in a shoe press, said method comprising the following steps: arranging a spray device next to the roll jacket surface, making available a collecting device which is provided with an opening and collects liquid, moving said roll jacket surface past said spray device, applying a medium onto said roll jacket surface with the aid of said spray device, and collecting liquid in said liquid-collecting device. The invention is characterized in that said medium is sprayed with high kinetic energy onto said roll jacket surface to follow a fluid stream rebounding from the roll jacket surface, so that the liquid is conveyed to said liquid-collecting device.
    Type: Application
    Filed: June 4, 2003
    Publication date: March 18, 2004
    Inventor: Peter Hallberg
  • Publication number: 20040045689
    Abstract: An apparatus and a method are provided for draining water from a cellulose web which is formed in a wedge-shaped space defined by two wires, the wires being supported on chamber assemblies including at one time at least one water receiving chamber, the water flowing therein through the wire as a result of a pressure difference. Each water receiving chamber has connected thereto at least one substantially vertical pipe having a vertical drop between its top and bottom end sufficient for developing a gravitational suction leg in the water flowing pipe, and the pipe terminating in a water receiver.
    Type: Application
    Filed: October 20, 2003
    Publication date: March 11, 2004
    Inventor: Harri Tahti
  • Publication number: 20040020616
    Abstract: A process for recovering inorganic material from a deinking sludge obtained as reject material in the recovery of recycled fiber from waste paper.
    Type: Application
    Filed: June 11, 2003
    Publication date: February 5, 2004
    Inventors: Boris Dahlblom, Jorgen Dahlin, Mats Erik Larsson, Erik Mattsson, Arne Sundkvist, Arnold Almqvist
  • Publication number: 20030192661
    Abstract: A non-woven web of fibrous material is produced using a moving foraminous element in the practice of the foam process. A first foam slurry of air, water, fibers and a surfactant is generated and centrifugally pumped into contact with the moving foraminous element. Substantially fiber-free foam is withdrawn from the foraminous element while forming a non-woven web of fibrous material on the foraminous element, and at least a part of the substantially fiber-free foam is used in the generation of the first foam slurry. Recycling is also typically practiced using a centrifugal pump, and the centrifugal pumps are preferably degassing pumps which remove some of the gas from the foam. By practicing the invention it is possible to produce fibrous webs using the foam process that are more than two meters wide, and at a forming speed of more than about 100 m/min (e.g. about 200-500 m/min).
    Type: Application
    Filed: May 8, 2003
    Publication date: October 16, 2003
    Applicant: Ahlstrom Glassfibre Oy
    Inventors: Jorma Elonen, Kay Rokman, Arto Koso, Juhani Jansson
  • Patent number: 6630014
    Abstract: Improved mist eliminator (50) for use in pulp washers, deinking cells and the like, and methods of use are disclosed. A cyclonic gas/liquid separator (50) is provided that includes an elongated housing (100) with a cyclonic flow inducing vane assembly (108) disposed at a medial location along the length of the housing (100) to divide the separator (50) into two tandem cyclonic action zones (150, 152) of approximate equal volume within the housing (100). An initial separation is effected in the first cyclonic action zone (150) followed by final separation in the downstream or second cyclonic action zone (152).
    Type: Grant
    Filed: January 9, 2002
    Date of Patent: October 7, 2003
    Assignee: Kadant Black Clawson Inc.
    Inventor: Clinton R. Parks
  • Patent number: 6627086
    Abstract: Aqueous suspensions of paints in waste waters can be treated to detackify the paint and facilitate its removal by contacting the paint suspension at a pH of from about 5 to about 14 with a polyarylamine that is produced by reacting an aldehyde with an arylamine in the presence of an acid in an aqueous suspension. The same polyarylamine can also be used for reducing the color content of highly colored liquids. Compositions containing the polyarylamine are also described.
    Type: Grant
    Filed: March 21, 2001
    Date of Patent: September 30, 2003
    Assignee: Polymer Ventures, Inc.
    Inventors: Robert P. Mahoney, Christopher B. Murphy, Michael Dugan
  • Patent number: 6602389
    Abstract: Disclosed is a process for preparing a paper web. The paper web is prepared from a low-grade furnish, which contains low-grade pulps, such as recycled pulp and/or groundwood pulp, and which, in one preferred embodiment, is a newsprint furnish. In accordance with the disclosed process, a pre-flocculated filler is added to the furnish prior to forming the paper web from the furnish. Filler will be retained in the web, and retention of undesired components of the furnish in the web will be reduced as compared with newsprint in which a filler is incorporated via conventional processes. Another embodiment contemplates the incorporation of a pre-flocculated coated broke slurry into a paper furnish prior to paper formation. The paper web formed via the process of the invention will have improved properties as a result of the incorporation of the pre-flocculated filler or treated broke into the web.
    Type: Grant
    Filed: January 4, 2002
    Date of Patent: August 5, 2003
    Assignee: Grain Processing Corporation
    Inventors: Richard D. Harvey, Stuart W. Mabee, James M. Crandall
  • Patent number: 6592712
    Abstract: A method for manufacture of loaded paper or paperboard products, comprising the steps of separating at least one process stream from the papermaking process, wherein the process stream includes fines and/or filler; combining the process stream with long fibers and thickening to form a residue; treating the residue to form fiber-filler complexes; and using the fiber-filler complexes in the papermaking process to form the paper.
    Type: Grant
    Filed: June 25, 2001
    Date of Patent: July 15, 2003
    Assignee: International Paper Company
    Inventors: Alexander A. Koukoulas, Thomas E. Altman, M. C. Matthew, Thomas E. Amidon, Fernand Mora
  • Patent number: 6589427
    Abstract: This invention relates to a process for treating an effluent comprising a mixture of spent wash and black liquor, said process comprising mixing the effluent with a flocculating agent consisting of a mixture of salts of Group III and transition metals, mixture of natural earth's along with an oxide of alkaline earth metal followed by treating with a combination of ion exchange resins.
    Type: Grant
    Filed: February 28, 2001
    Date of Patent: July 8, 2003
    Assignee: Council of Scientific & Industrial Research
    Inventors: Pramod Prabhakar Moghe, Vinita Vinay Panchanadikar, Ashwini Vinayak Pol, Ajit Ramesh Joshi, Prakash Kondiba Bahirat, Priyadarshini Kudlu, Shekhar Prakash Bahirat
  • Publication number: 20030106660
    Abstract: The present invention relates to a method of and an apparatus for controlling the operation of the short circulation of a paper, paper board or the like production machine. The method and apparatus according to the invention are especially preferably suitable for use in the approach system, i.e. so-called short circulation, of said production machines for regulating the headbox feed pressure. A characteristic feature of the method and apparatus according to the invention is that at a suitable location in the approach system of said production machine there is arranged a controllable parallel flow, by means of which at least one flow in the approach system is regulated so that the pressure in the headbox remains essentially constant.
    Type: Application
    Filed: July 16, 2002
    Publication date: June 12, 2003
    Inventors: Lasse Bjorkstedt, Jouni Matula
  • Publication number: 20030106661
    Abstract: In the short circulation of a paper machine, a chemicals flow (F1) is fed into a fibre suspension flow in connection with a pipe expansion comprising a first pipe (1) and a second pipe (2) having a larger diameter than the first pipe, which pipes are connected to each other by means of an expansion step (3) perpendicular to the direction of flow. The chemicals flow (F1) can be passed so as to be mixed with the fibre suspension flow either in the second pipe (2) in an ideal mixing zone situated after the expansion step (3) or in the first pipe (1) so close to the expansion step (3) that the chemicals which are added have no time to react with the fibre suspension before the flow enters the expansion step (3).
    Type: Application
    Filed: December 9, 2002
    Publication date: June 12, 2003
    Inventors: Hannu Lepomaki, Juhani Sams
  • Patent number: 6572736
    Abstract: The non-woven web of the present invention is comprised of recycled cellulose fiber and untreated Clarifier Sludge, and optionally, recycled glass fiber. Unlike uses of reclaimed Clarifier Sludge whereby the material has been treated in some fashion to improve its quality, the non-woven web of the present invention utilizes untreated Clarifier Sludge. The Clarifier Sludge of the present invention is dry enough to handle, and in one example varies between about 30% and about 45% solids. The Clarifier Sludge can be added to web-forming equipment (e.g., papermaking equipment) either in a waste paper disintegrator or into a recycling apparatus (e.g., broke pulper) whose output is metered into a refiner tank of the web-forming equipment. In an embodiment utilizing a broke pulper for introduction of the Clarifier Sludge, the broke pulper is filled with clarifier sludge and water to a consistency of about 3.5% solids.
    Type: Grant
    Filed: October 9, 2001
    Date of Patent: June 3, 2003
    Assignee: Atlas Roofing Corporation
    Inventors: Philip Bush, Ricky Burkeen, Robert H. Blanpied
  • Publication number: 20030089477
    Abstract: A system and method for altering the tack of a material, namely a polymer used as an adhesive, also known as stickies, or pitch. The present invention reduces the tack of the stickies and pitch by exposing the materials for a short duration to low-energy pulsed electrical discharges between a pair of electrodes that are submerged in a liquid medium, such as a fiber stream, water, a pulp slurry, or whitewater.
    Type: Application
    Filed: December 18, 2002
    Publication date: May 15, 2003
    Applicant: Institute of paper science and technology
    Inventors: Sujit Banerjee, Howard Corcoran
  • Patent number: 6558557
    Abstract: Process and decker for bringing together a first aqueous pulp suspension layer with at least one additional suspension layer. The process includes moving the first pulp suspension layer and the at least one additional suspension layer on moving layer supports, and guiding sides of the first pulp suspension layer and the at least one additional suspension layer that are adapted to contact each other on guiding surfaces that are one of stationary and limitedly moving. The guide surfaces include contoured surfaces arranged to run substantially parallel to the layer supports. The process further includes applying the at least one additional suspension layer onto the first pulp suspension layer at a wedge-shaped gap, and draining the first pulp suspension layer and the at least one additional suspension layer. The decker includes at least one rotating cylinder, and an endless wire guided around at least a portion of an outer circumference of the at least one rotating cylinder.
    Type: Grant
    Filed: February 16, 1999
    Date of Patent: May 6, 2003
    Assignee: Voith Sulzer Papiertechnik Patent GmbH
    Inventors: Axel Gommel, Josef Schneid, Rolf Wenske
  • Publication number: 20030079846
    Abstract: A multi-purpose paper, a manufacturing method thereof, and an application thereof are provided. The method of manufacturing the multi-purpose paper comprises steps of (a) providing a papermaking material and obtaining a clean paper pulp by treating the papermaking material, (b) adding at least one functional additive into the clean paper pulp to form the multi-purpose paper, and (c) processing the multi-purpose paper to form thereon an uneven surface structure. The cultivating paper has the combined functions of weed control, pest control, supplying the required nutrients to plants to help develop the root system, maintaining moisture and breath for the root system. The multi-purpose paper can be carriers of agricultural antagonistic microorganisms and serve as the basic functional substrate for weed control, pest control, sowing, growing seedlings, fertilization, fertilizer saving, manpower saving and organic cultivating.
    Type: Application
    Filed: October 26, 2001
    Publication date: May 1, 2003
    Applicant: Yuen Foong Yu Paper MFG Co., LTD
    Inventor: Ching-Chung Huang
  • Patent number: 6551458
    Abstract: In a papermaking process, filtering of white water containing fiber material is performed by feeding the white water to a filter on a surface of which a layer of auxiliary pulp has been formed, such that the white water is filtered through the layer of auxiliary pulp and fiber material in the white water remains in the layer of auxiliary pulp. The mixture of auxiliary pulp and fiber material is removed from the filter and is fed to a fractionating screen. The screen separates the mixture into a short-fibered pulp fraction that can be returned to the papermaking process, and a long-fibered pulp fraction that is returned to the filter where it is used as auxiliary pulp to form a layer on the filter surface.
    Type: Grant
    Filed: October 30, 2001
    Date of Patent: April 22, 2003
    Assignee: Metso Paper, Inc.
    Inventors: Vesa Juutinen, Timo Pekkarinen
  • Patent number: 6548427
    Abstract: The present invention is generally directed to a tissue product with improved flushability. Specifically, the incorporation of both a temporary wet strength agent and an alkaline reagent into the tissue product results in the tissue product having high initial wet tensile strength and a high rate of wet tensile loss. The high rate of wet tensile loss is caused by the high pH of the alkaline reagent that is incorporated during the dry end of a tissue manufacturing process. The temporary wet strength agent is added in the wet end of a tissue manufacturing process. In certain embodiments of the present invention, glyoxylated polyacrylamide may be used as the temporary wet strength agent, while the alkaline reagent may be in dry form or may be encapsulated.
    Type: Grant
    Filed: November 22, 2000
    Date of Patent: April 15, 2003
    Assignee: Kimberly-Clark Worldwide, Inc.
    Inventors: Thomas G. Shannon, Michael J. Smith, Patrick P. Chen, Graciela Jimenez
  • Patent number: 6540871
    Abstract: An apparatus and method are provided to reduce the size of solid clumps of material and thereby permit reuse of the material. In particular, the apparatus and method allow for reuse of sediment accumulated in a storage area for paper pulping byproducts. The sediment is conveyed from the storage area to an tank. In the tank, the sediment is agitated to produce reduced-size clumps of the sediment. The reduced-size clumps are in a slurry that is capable of being burned at least one of a facility that produces paper pulp and a facility that produces paper products.
    Type: Grant
    Filed: December 21, 1999
    Date of Patent: April 1, 2003
    Assignee: The Maitland Company
    Inventor: Robert Rumph
  • Publication number: 20030051836
    Abstract: The invention relates to the use of certain lipolytic enzymes such as cutinases and lipases in the manufacture of paper and paper products from recycled paper. Examples of such enzymes are derived from strains of Humicola, Candida, Fusarium and Pseudomonas. By use of these enzymes, the problems relating to the so-called “stickies” derived from waste paper are reduced.
    Type: Application
    Filed: May 21, 2002
    Publication date: March 20, 2003
    Applicant: Novozymes A/S
    Inventors: Kim Borch, Henrik Lund, Masaki Sharyo, Hiromichi Sakaguchi, Hanne Host Pedersen, James William Fitzhenry
  • Publication number: 20030041990
    Abstract: The present invention relates to a process for recycling fillers and coating pigments from the preparation of paper, paperboard and cardboard found in the residual water sludges from coating plant waste waters, deinking plants, internal water treatment plants or separators, and to the use of a thus obtained pigment slurry for the preparation of a coating compound for the paper industry or in the paper stock for papermaking.
    Type: Application
    Filed: July 15, 2002
    Publication date: March 6, 2003
    Inventor: Dieter Munchow
  • Publication number: 20030037897
    Abstract: The present invention discloses a nanometer-scale particle recycled slurry paper. The shares in weight of its ingredients are: papermaking wastewater slurry 20-80, pulp 20-80, nanometer-scale calcium carbonate 2-20, and chemical auxiliary agent performing the function of coacervation 1-5. The production technology process of the present invention is: slurry→pressing and squeezing the slurry→washing and filtering→putting into a pool→adding nanometer-scale calcium carbonate→mixing the paper pulp with the chemical auxiliary agent performing coacervation function→stirring and mixing→transferring onto a mesh→pressing and squeezing→drying→forming into paper→winding into reels.
    Type: Application
    Filed: January 31, 2002
    Publication date: February 27, 2003
    Inventor: Jianhu Yu
  • Publication number: 20030037896
    Abstract: Chemical additives can be adsorbed on cellulosic papermaking fibers at high levels with a minimal amount of unadsorbed chemical additives present in the papermaking process water. A method includes treating a fiber slurry with an excess of the chemical additive, allowing sufficient residence time for adsorption to occur, filtering the slurry to remove unadsorbed chemical additives, and redispersing the filtered pulp with fresh water. Filtrate from the thickening process contains unadsorbed chemical additive and it is not sent forward in the process with the chemically treated fibers. The method can be employed to make improved paper products.
    Type: Application
    Filed: May 29, 2002
    Publication date: February 27, 2003
    Inventors: Mike Thomas Goulet, Jill A. Georger, Denise Alice Polderman, Maurice Alan Wyatt, Victor Michael Gentile
  • Publication number: 20030037893
    Abstract: Electrophotographic paper and a method for its production, according to which method a cellulose pulp is slushed, a filler is mixed with the slush, and the slush is formed in the paper machine into a web, which is dried. According to the invention, bivalent or trivalent cations in an amount of at least 0.1% of the dry weight of the pulp are attached to the acid groups of the cellulose pulp before the forming of the web. Thereby a paper web is obtained the surface charge of which is at least approximately 600 V when relative humidity is 40%. The surface charge of the paper according to the invention remains stable within a wide humidity range. For this reason, when the paper according to the invention is used, the need for drying the paper in the printing press is significantly reduced.
    Type: Application
    Filed: September 17, 2002
    Publication date: February 27, 2003
    Inventors: Sami Simula, Tarja Tamminen, Kaarlo Niskanen
  • Patent number: 6514379
    Abstract: A procedure for arranging water circulations in an integrated paper mill, the paper making process of which having three partly separate process phases concerning the water circulations (I, II, III). In the first phase, the fiber raw material is pretreated, defibered and cleaned for producing mechanical, chemi-mechanical and recycled pulp, in the second phase the pulp is treated further for improving the quality, and in the third phase it is made into paper or board. The circulation waters of the first process phase are concentrated by circulating the filtrates of the concentration and pressing phases counter-current inside the water circulation (I), and the circulation water thus concentrated is conducted into an effluent evaporation plant to be concentrated and then burnt in a combustion boiler. The water quantity discharged from the water circulation (I) of the first process phase is replaced by conducting such circulation waters of the paper mill into the front dilution of the press.
    Type: Grant
    Filed: November 3, 2000
    Date of Patent: February 4, 2003
    Assignee: Metso Paper, Inc.
    Inventors: Rainer Gartz, Sakari Kaijaluoto, Kari Kokkonen
  • Patent number: 6511611
    Abstract: Compositions of aluminum chlorohydrate and high molecular weight branched epichlorohydrin amine condensate polymers are applied to waste liquids, such as pulp and paper mill effluents having a lignin content, to reduce true color, The branched epichlorohydrin amine condensate polymer is branched using branching agents which result in a molecular weight greater than about 300,000 and permit solubility. When applied to waste liquids, the high molecular weight branched epichlorohydrin amine condensate polymer and aluminum chlorohydrate react with the lignin components in the waste liquid to form an insoluble agglomerate thus reducing the true color of the waste liquid. The resulting agglomerate, including the colored lignin, may be filtered from the waste liquid.
    Type: Grant
    Filed: March 11, 2002
    Date of Patent: January 28, 2003
    Assignee: Steen Research, LLC
    Inventors: Stephen R. Temple, Michael J. Stoltz
  • Patent number: 6491827
    Abstract: Compositions of aluminum chlorohydrate and high molecular weight branched epichlorohydrin amine condensate polymers are applied to waste liquids, such as pulp and paper mill effluents having a lignin content, to reduce true color. The branched epichlorohydrin amine condensate polymer is branched using branching agents which result in a molecular weight greater than about 300,000 and permit solubility. When applied to waste liquids, the high molecular weight branched epichlorohydrin amine condensate polymer and aluminum chlorohydrate react with the lignin components in the waste liquid to form an insoluble agglomerate thus reducing the true color of the waste liquid. The resulting agglomerate, including the colored lignin, may be filtered from the waste liquid.
    Type: Grant
    Filed: November 17, 2000
    Date of Patent: December 10, 2002
    Assignee: Steen Research, LLC
    Inventors: Stephen R. Temple, Michael J. Stoltz
  • Publication number: 20020148581
    Abstract: Processes for manufacturing a paper product from cellulose pulp, part of which comes from a broke and part of which comes from a fresh pulp are provided. The processes involve first redissolving in a broke pulper, with stirring and in an alkaline medium, cellulose fibers contained in said broke to form a broke pulp. Next, the broke pulp is brought to a concentration and a pH close to that characteristic of the fresh pulp by (1) diluting said broke pulp with a white water and (2) acidifying said broke pulp by injecting carbon dioxide into said broke pulp after the broke pulp has left the broke pulper and before admixing said broke pulp with said fresh pulp. Then the broke pulp is admixed with the fresh pulp to form a pulp mixture and the pulp mixture is dewatered to form a paper product and a white water.
    Type: Application
    Filed: June 17, 2002
    Publication date: October 17, 2002
    Inventors: Jean-Mathieu De Rigaud, Alain Sauvage
  • Publication number: 20020134519
    Abstract: A method for eliminating detrimental substances in a process liquid. The process liquid has a first pH and, in addition to said detrimental substances, comprises metal ions and suspended material. Carbon dioxide is added to the process liquid in order to bring the process liquid to a second pH, lower than the first pH. Thereby, the metal ions comprise hydroxide builders, wherein the carbon dioxide (CO2) is added in an amount which causes the second pH to be between 8 and 6.5, so that the carbon dioxide primarily forms bicarbonate ions (HCO3−) having a pH-buffering effect and the metal ions primarily form metal hydroxides. Thereafter, the detrimental substances coagulate or agglomerate with the metal hydroxides and are adhered to the suspended material so that they become inactive. The method is advantageously used in connection with pulp and/or paper making processes.
    Type: Application
    Filed: January 9, 2002
    Publication date: September 26, 2002
    Inventors: Anette Karlsson, Liviu Haias
  • Patent number: 6451164
    Abstract: A process for de-watering lime mud in a Krafft pulping process is described. The process includes an improvement which comprises adding an effective water-removal rate enhancing amount of an alkyleneamine to the lime mud prior to filtration. The preferred alkyleneamine is ethyleneamine, that is, an amine having at least one —(CR2—CR2—NH—)— unit wherein each R is independently is H or an alkyl (straight-chain, branched, or cyclic) group of from about 1 to about 10 carbon atoms. Ethyleneamines include ethylenediamine, diethylenetriamine, triethylenediamine, triethylenetetramine, tetraethylenepentamine, piperazine, aminoethylpiperazine, and ethyleneamine mixtures such as mixtures of ethyleneamine oligomers having an average molecular weight of about 200-500.
    Type: Grant
    Filed: September 25, 2001
    Date of Patent: September 17, 2002
    Assignee: Huntsman Ethyleneamines Limited
    Inventor: Alan P. Croft
  • Publication number: 20020121352
    Abstract: Methods and devices are provided for treating a fluid with a high voltage electric field for decontaminating the fluid or a variety of other purposes. In a preferred embodiment for decontamination, the method includes (a) applying an electric field across a fluid having contaminants dispersed therein; and then (b) flowing the fluid through a decontamination cell to separate from the fluid at least a portion of the contaminants. An apparatus for use with this method preferably includes an electropotential cell comprising a housing containing an anode and a cathode for applying an electric field to a fluid flowing through the housing, a decontamination cell in fluid communication with the electropotential cell for separating from the fluid at least a portion of any contaminants dispersed therein, and an optional means for introducing gas bubbles into the fluid before the fluid flows to the electropotential cell.
    Type: Application
    Filed: March 4, 2002
    Publication date: September 5, 2002
    Inventors: J. Alan Lawson, Ahmed A. BaOsman, Jeffrey S. Hsieh
  • Patent number: 6444092
    Abstract: The present invention relates to a process for recycling fillers and coating pigments from the preparation of paper, paperboard and cardboard found in the residual water sludges from coating plant waste waters, deinking plants, internal water treatment plants or separators, and to the use of a thus obtained pigment slurry for the preparation of a coating compound for the paper industry or in the paper stock for papermaking. An essential element of the invention is a process for recycling fillers and coating pigments from the preparation of paper, paperboard and cardboard found in the residual water sludges from coating plant waste waters, deinking plants, internal water treatment plants or separators, characterized in that the residual water sludges containing the fillers and coating pigments are subjected to mixing and then milling together with fresh pigments or fresh fillers in the form of powders, fresh-pigment containing slurries and/or fresh-filler containing slurries to yield a pigment slurry.
    Type: Grant
    Filed: December 21, 2000
    Date of Patent: September 3, 2002
    Assignee: Alpha Calcit Füllstoff GmbH
    Inventor: Dieter Münchow
  • Publication number: 20020112837
    Abstract: In a method and an associated apparatus for discharging the whitewater from inside the loop of a continuous dewatering wire of a former, specifically a twin wire former in a paper machine the accumulating whitewater is collected by a collection tank, which is located within the loop; the collected whitewater is separated from the air, still inside the loop, by suctioning off of the area above the collection tank and the whitewater is removed from the collection tank through at least one channel that is connected to the collection tank and is located below the collection tank's water level.
    Type: Application
    Filed: February 15, 2002
    Publication date: August 22, 2002
    Inventors: Wolfgang Mayer, Ralf Rziha