Treatment With Particular Chemical Patents (Class 162/70)
  • Patent number: 10364297
    Abstract: The present invention relates to a method for manufacturing microfibrillated polysaccharide, preferably microfibrillated cellulose. The invention also relates to microfibrillated cellulose obtainable by the method and use of the microfibrillated cellulose. The method of manufacturing microfibrillated cellulose comprises the following steps: a) Providing a hemicellulose containing pulp, b) Providing wood degrading enzymes c) Mixing pulp and enzymes d) Keeping the mixture in a continuous, flowing system of essentially cylindrical geometry (for example in a plug-flow reactor), e) Conveying the mixture to one or more mixing zones for recirculating and homogenizing the mixture, and f) Harvesting microfibrillated cellulose with a relatively narrow size distribution during the recirculation.
    Type: Grant
    Filed: October 26, 2015
    Date of Patent: July 30, 2019
    Assignee: STORA ENSO OYJ
    Inventors: Lars Axrup, Henri Kastinen
  • Patent number: 10358685
    Abstract: The present invention provides a method for obtaining a monosaccharide from a lignocellulosic material in a form suitable for use as a carbon source in a reaction. In some embodiments, the monosaccharide is in a form suitable for use in a fermentation reaction, e.g., to produce an alcohol such as ethanol.
    Type: Grant
    Filed: May 2, 2013
    Date of Patent: July 23, 2019
    Assignees: The Regents of the University of California, National Technology & Engineering Solutions of Sandia, LLC
    Inventors: Ning Sun, Bradley M. Holmes, Kim Tran, Anthe George, Blake Simmons
  • Patent number: 8968515
    Abstract: A method of alkaline pretreatment of biomass, in particular, pretreating biomass with gaseous ammonia.
    Type: Grant
    Filed: December 22, 2010
    Date of Patent: March 3, 2015
    Assignee: Board of Trustees of Michigan State University
    Inventors: Venkatesh Balan, Bruce E. Dale, Shishir Chundawat, Leonardo Sousa
  • Patent number: 8945347
    Abstract: A method of producing hardwood pulp is provided. This method comprises treating hardwood chips with one or more than one Family 11 xylanase enzyme in the absence of adding an oxidizing enzyme for about 5 minutes to about 120 minutes, to produce a treated chip mixture. The treated chip mixture is then mechanically refined to produce the hardwood pulp.
    Type: Grant
    Filed: May 3, 2005
    Date of Patent: February 3, 2015
    Assignee: Centre Technique de l'Industrie des Papiers, Cartons et Celluloses
    Inventors: Michel Petit-Conil, J. Mark A. Hoddenbagh, Jeffrey S. Tolan
  • Patent number: 8926712
    Abstract: A solvent spun bamboo fiber with a high wet modulus and a producing method thereof are disclosed. The producing method includes: activating by adding a bamboo pulp into de-ionized water, adjusting the pH value, adding cellulase and adjusting the pH value by adding alkali; squeezing by vacuum dehydration; pre-dissolving by adding an aqueous solution containing 50-88% by mass of N-methylmorpholine-N-oxide; then dissolving by putting the above pre-dissolved mixture into a dissolver, heating, vacuumizing, dehydrating, dissolving, homogenizing and defoaming; spinning by spraying through a spinneret and forming a bamboo fiber by dry-wet spinning; water washing; bleaching; oiling; and drying. The present method is simple to operate, free of industrial pollution, low energy consuming, and highly safe. The bamboo fiber produced by the present method not only keeps the natural physical and chemical properties of bamboo fiber, but also has a high wet modulus without harmful chemical residues.
    Type: Grant
    Filed: September 7, 2010
    Date of Patent: January 6, 2015
    Assignee: Shanghai Lyocell Fibre Development Co., Ltd.
    Inventors: Kun Jiang, Xiaoliang Wang, Changli Zhu, Xin Wang, Dianhai Zheng
  • Patent number: 8920602
    Abstract: In general, the present disclosure is directed to compositions and processes to increase pulp yield, reduce extractives, and reduce scaling in a chemical pulping process. In one particular embodiment, for instance, the present disclosure is directed to a composition comprising a surface active agent, an alkaline mixture, at least one polymer, the polymer having a linear backbone segment having two ends, at least one phosphorus component, the phosphorus component chemically linked along the linear backbone segment of the polymer, and at least one end component, the end component chemically linked to one or both ends of the linear backbone segment of the polymer.
    Type: Grant
    Filed: October 4, 2010
    Date of Patent: December 30, 2014
    Inventors: Michael M. Blackstone, Atif M. Dabdoub
  • Publication number: 20140350144
    Abstract: A biocomposite material (1) and methods of production thereof are described. The biocomposite material (1) exhibits a physical stiffness, strength and toughness comparable to known glass fibre composites while its composition makes it inherently impermeable to water. A general formulation for the biocomposite material (1) is given by the expression: Cel(1-x-y)HPIx HPOy where “Cel” represents cellulose fragments (2), “HPI” represents hydrophilic binders (4), “HPO” represents hydrophobic binders (5) and (x) and (y) quantify the percentage by weight of the hydrophilic (4) and hydrophobic binders (5) present within a material, respectively. The described properties of the biocomposite material (1) are achieved when (x) is within the range of from 0.05 to 0.55 and (y) is within the range of from 0.05 to 0.65.
    Type: Application
    Filed: August 13, 2014
    Publication date: November 27, 2014
    Inventors: David HEPWORTH, Eric WHALE
  • Patent number: 8871054
    Abstract: A process is provided for making a fluff pulp sheet, comprising: contacting at least one cationic dye and at least one debonder surfactant with a composition comprising fluff pulp fibers, to form a fluff pulp mixture; forming a web from the fluff pulp mixture; and drying the web, to obtain the fluff pulp sheet. A fluff pulp sheet is also provided, comprising a web comprising fluff pulp fibers; at least one cationic dye; and at least one debonder surfactant. Products and uses of the fluff pulp sheet are also provided.
    Type: Grant
    Filed: July 21, 2011
    Date of Patent: October 28, 2014
    Assignee: International Paper Company
    Inventor: James E. Sealey
  • Publication number: 20140305603
    Abstract: A process for making pulp includes providing plant fiber raw material. The plant fiber raw material can be wood fiber or gramineae plant fiber. The plat fiber raw material is cooked to make a pulp. A TEMPO catalytic oxidation system is added to the pulp to oxidize the pulp fiber. The oxidized pulp fiber is then bleached.
    Type: Application
    Filed: December 12, 2013
    Publication date: October 16, 2014
    Applicant: Goldeast Paper (Jiangsu) Co., Ltd
    Inventors: PU MA, XIANG-FEI LIU, YUNGCHANG F. CHIN, REN-RONG WANG
  • Patent number: 8815053
    Abstract: A method of treating and utilizing liquid flows at a chemical pulp mill including stages for: a) chemical pulp is produced in an alkaline cooking process, b) the brown stock generated in the cooking is treated, said treatment comprising washing of the stock and preferably oxygen delignification and subsequent washing of the stock, c) a bleaching process for the brown stock, the bleaching sequence comprising at least one stage using chlorine dioxide and additionally at least one oxidizing bleaching stage and having at least two washing stages for treating the stock with liquids and for producing filtrates, and d) filtrates from stage c) are purified at an effluent treatment plant of the chemical pulp mill, which comprises at least biological treatment, for obtaining purified effluent. The method further includes a stage e), where the purified effluent with a color of 200 mg/l (Pt color) or more and a COD value of over 150 mg/l is used as pulp treatment liquid in stage c).
    Type: Grant
    Filed: November 22, 2010
    Date of Patent: August 26, 2014
    Assignee: Adritz Oy
    Inventors: Janne Vehmaa, Olavi Pikka, Pekka Tervola
  • Patent number: 8808500
    Abstract: Microbial growth in an aqueous system containing borohydride residues is controlled by adding an aldehyde or aldehyde source, followed by adding an active halogen biocide. The active halogen biocide is preferably stabilized by an N-hydrogen compound.
    Type: Grant
    Filed: January 20, 2012
    Date of Patent: August 19, 2014
    Assignee: Lonza Inc.
    Inventor: Kevin Janak
  • Patent number: 8795469
    Abstract: Paper comprised solely of a nonwood fiber mix is demonstrated to meet the technical physical specifications of commercially produced papers made from wood. The esthetically impressive paper meets nearly every technical specification of commercially produced paper.
    Type: Grant
    Filed: June 24, 2011
    Date of Patent: August 5, 2014
    Assignee: Prairie Paper Ventures Inc.
    Inventor: Jeff Golfman
  • Patent number: 8764942
    Abstract: Methods to preserve starch present in pulp are provided and also methods to control calcium precipitation and/or scaling in digesters or BOD systems. The methods can be performed as part of a papermaking process. Process water containing pulp can be treated with a chloramine. Process water containing pulp with native starch can receive a double treatment with at least one biocide, such as chloramine, and at least one oxidant, such as sodium hypochlorite. The treatment can be performed in any suitable manner. The treatment can be performed at one or more stages or locations in a papermaking system. A target residual chloramine value or range can be achieved by the treatment. Packaging sheets/boards and other paper products manufactured using the methods provided exhibit superior strength and other desirable characteristics.
    Type: Grant
    Filed: June 4, 2013
    Date of Patent: July 1, 2014
    Assignee: Buckman Laboratories International, Inc.
    Inventor: Eddie Van Haute
  • Patent number: 8715462
    Abstract: Methods and apparatus are provided for exploiting coated paper products such as coated paper cups. End products include biofuels that have a high energy density. The biofuels may be mixed with coal or other fuels and have good binding characteristics. In some embodiments, useful chemicals such as HMF are produced. The methods involve heat treatment at relatively mild temperatures and pressures under acidic conditions.
    Type: Grant
    Filed: April 30, 2010
    Date of Patent: May 6, 2014
    Inventor: Alexis Fosse Mackintosh
  • Patent number: 8668806
    Abstract: An omnibus process of pulping and bleaching lignocellulosic materials in which a charge of a lignocellulosic material is biopulped and/or water extracted prior to pulping and bleaching. The lignocellulosic material may be mechanically pulped and bleached in the presence of an enzyme that breaks lignin-carbohydrate complexes. The aqueous extract in embodiments including a water extract step is separated into acetic acid and hemicellulose sugar aqueous solutions.
    Type: Grant
    Filed: November 21, 2012
    Date of Patent: March 11, 2014
    Assignee: The Research Foundation of the State University of New York
    Inventors: Thomas E. Amidon, Raymond Francis, Gary M. Scott, Jeremy Bartholomew, Bandaru V. Ramarao, Christopher D. Wood
  • Publication number: 20140048223
    Abstract: A method for treating a cellulosic material comprising extracting the cellulosic material with an extractant to selectively extract hemicellulose therein and separating the extracted hemicellulose to form a cellulosic product comprising less hemicellulose than the cellulosic material. The extractant comprises an amine oxide and a non-solvent. The cellulosic product retains the cellulosic fiber morphology.
    Type: Application
    Filed: March 14, 2013
    Publication date: February 20, 2014
    Applicant: CELANESE INTERNATIONAL CORPORATION
    Inventors: Rongfu Li, Jay Mehta, Xiaoyan Tu, Prabuddha Bansal, Michael Combs, Denis Fallon, Lawton E Kizer
  • Patent number: 8617355
    Abstract: 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: Grant
    Filed: November 21, 2011
    Date of Patent: December 31, 2013
    Assignee: Andritz Inc.
    Inventors: Rodolfo Romero, Bertil Stromberg
  • Patent number: 8617356
    Abstract: Compositions and processes that enhance the brightness and improve color of pulp or paper when applied during different stages of the papermaking process involving optical brighteners are identified. Used in combination with optical brighteners and/or chelants the described agents produce a synergistic effect not previously identified in the paper process.
    Type: Grant
    Filed: April 30, 2012
    Date of Patent: December 31, 2013
    Assignee: Nalco Company
    Inventors: Prasad Duggirala, Sergey Shevchenko
  • Publication number: 20130277001
    Abstract: A system and method of manufacturing a feedstock for producing paper fiber from fruit of a plant may include providing a by-product source inclusive of fiber from the edible fruit after a process for removing a majority of the edible fruit is used to produce a food. One or more treatment processes to brighten the fruit by-product may be performed. The feedstock may be produced from the brightened fruit by-product.
    Type: Application
    Filed: April 18, 2013
    Publication date: October 24, 2013
    Inventors: Peter R. Moss, Doug A. Bippert, Rajesh Kumar Garg, Kim W. Robinson, Simon Gainey, Philip G. Crandall
  • Patent number: 8524474
    Abstract: Methods for obtaining concentrated sugar solution from polysaccharide enriched biomass by contacting biomass with water and at least one nucleophilic base to produce a polysaccharide enriched biomass comprising a solid fraction and a liquid fraction and then contacting the solid fraction with saccharification enzyme consortium to produce a saccharification product comprising at least about 7 percent by weight sugars in 24 hours. The methods include optionally adding at least one additive selected from the group consisting of polyethylene glycols, fatty acid esters, fatty acid ethoxylates, nonionic surfactants derived from polyethoxylated sorbitan and a fatty acid, sodium lauriminodipropionate, sodium cocoamphoacetate, sodium tridecyl ether sulfate and a combination of these, such that enzyme loading of the saccharification enzyme consortium can be reduced.
    Type: Grant
    Filed: November 19, 2009
    Date of Patent: September 3, 2013
    Assignee: E I du Pont de Nemours and Company
    Inventors: Subramaniam Sabesan, Christina Jacy Spado
  • Patent number: 8486228
    Abstract: Provided is a lignocellulosic biomass saccharification pre-treatment device capable of producing a pretreated material for saccharification. The lignocellulosic biomass saccharification pre-treatment device comprises a separation unit 4 which separates ammonia gas by heating a pretreated material for saccharification obtained from a substrate mixture obtained by mixing lignocellulosic biomass and ammonia water; a first heat recovery unit 25 which recovers heat-of-dissolution generated when ammonia gas is dissolved in water, and the heat supply units 8, 9, 10 which generate heat by using heat-of-dissolution recovered by the frst heat recovery unit 25 and supply the heat to the separation unit 4.
    Type: Grant
    Filed: July 11, 2011
    Date of Patent: July 16, 2013
    Assignee: Honda Motor Co., Ltd.
    Inventors: Tsuyoshi Baba, Junji Yasuda
  • Patent number: 8440052
    Abstract: An apparatus for feeding one or more chemicals into a process stream of a pulp process is disclosed, as well as a method of utilizing the apparatus for feeding one or more chemicals into a pulp process is disclosed.
    Type: Grant
    Filed: May 29, 2009
    Date of Patent: May 14, 2013
    Assignee: Nalco Company
    Inventors: Prasad Duggirala, Michael Murcia, Tommy Jacobson, Mika Salonen, Martti O. Latva
  • Patent number: 8317975
    Abstract: An omnibus process of pulping and bleaching lignocellulosic materials in which a charge of a lignocellulosic material is biopulped and/or water extracted prior to pulping and bleaching. The lignocellulosic material may be mechanically pulped and bleached in the presence of an enzyme that breaks lignin-carbohydrate complexes. The aqueous extract in embodiments including a water extract step is separated into acetic acid and hemicellulose sugar aqueous solutions.
    Type: Grant
    Filed: April 27, 2006
    Date of Patent: November 27, 2012
    Assignee: The Research Foundation of the State University of New York
    Inventors: Thomas E. Amidon, Raymond Francis, Gary M. Scott, Jeremy Bartholomew, Bandaru V. Ramarao, Christopher D. Wood
  • Patent number: 8308900
    Abstract: Methods to control lipophilic extractives in Acacia pulp and fibers are described. One method involves contacting the pulp or fibers with a composition containing at least one enzyme, such as at least one esterase or lipase or both, for a sufficient time and in a sufficient amount to control the lipophilic extractives present in the pulp or fibers.
    Type: Grant
    Filed: September 12, 2007
    Date of Patent: November 13, 2012
    Assignee: Buckman Laboratories International, Inc.
    Inventors: Rosa M. Covarrubias, Budi Liputra
  • Patent number: 8268122
    Abstract: The present invention relates to a process for preparing a high-yield pulp comprising a) treating a lignocellulose containing material chemically by means of an oxidizing system comprising at least one non-enzymatic oxidant substantially free from ozone and chlorine dioxide and an activator at a pH from about 2 to about 6.5; and b) treating the lignocellulose containing material mechanically for a time sufficient to produce a high-yield pulp, wherein the lignocellulose containing material is chemically treated prior to and/or during any mechanical treatment stage, and wherein the lignocellulose containing material is not chemically treated at a pH from about 11.5 to about 14 between stages a) and b).
    Type: Grant
    Filed: November 29, 2006
    Date of Patent: September 18, 2012
    Assignee: Akzo Nobel N.V.
    Inventors: Karin Susanne Maria Walter, Eva Linnea Elisabeth Wackerberg, Magnus Lars Paulsson
  • Patent number: 8262858
    Abstract: Oxidative compositions and processes that preserve and enhance the brightness and improve color of pulp or paper when applied during different stages of the papermaking process are identified. The oxidative composition and method maintains and/or enhances brightness, prevents yellowing, and enhances the performance of paper products. Used in combination with optical brighteners and/or chelants the oxidative agents produce a synergistic effect not previously identified in the paper process.
    Type: Grant
    Filed: March 29, 2011
    Date of Patent: September 11, 2012
    Assignee: Nalco Company
    Inventors: Prasad Y. Duggirala, Sergey M. Shevchenko, Katherine M. Broadus
  • Patent number: 8246780
    Abstract: Compositions and processes that preserve and enhance the brightness and improve color of pulp or paper when applied during different stages of the papermaking process are identified. The composition and method maintains and/or enhances brightness, prevent yellowing, and enhances the performance of paper products. Used in combination with optical brighteners and/or chelants the described agents produce a synergistic effect not previously identified in the paper process.
    Type: Grant
    Filed: March 23, 2006
    Date of Patent: August 21, 2012
    Assignee: Nalco Company
    Inventors: Prasad Duggirala, Sergey Shevchenko
  • Publication number: 20120156748
    Abstract: A process for treatment of a lignocellulosic material comprising contacting the lignocellulosic material with a solution of chloride ions, which solution comprises a concentration of chloride ions in the range from equal to or more than 1 ppm weight to equal to or less than 350 ppm weight based on the total weight of the solution; at a temperature in the range from equal to or more than 120° C. to equal to or less than 200° C.; and at a pH in the range from equal to or more than 0.1 to equal to or less than 4.
    Type: Application
    Filed: December 20, 2011
    Publication date: June 21, 2012
    Applicant: SHELL OIL COMPANY
    Inventors: Wilhelmus Maria BOS, Evert VAN DER HEIDE, Jan Gerrit DE JONG, Munro MACKAY
  • Publication number: 20120125551
    Abstract: Biomass pretreatment using anhydrous ammonia was found to be effective in a static vessel when the ammonia can penetrate through the biomass particles or pieces in vapor state. To achieve this condition, total system moisture content is kept below 40 weight % based on total mass in the system. The pretreated biomass product is effectively saccharified to produce fermentable sugars for biocatalyst production of a product.
    Type: Application
    Filed: November 16, 2011
    Publication date: May 24, 2012
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: Jeffrey David Cohen, Carl E. Camp, Yamaira Gonzalez
  • Patent number: 8007635
    Abstract: A process comprising treating a lignocellulosic material preferably pulp in the presence of a transition metal catalyst with a oxidizing agent selected from a group consisting of hydrogen peroxide, hypochlorite, hypochlorous acid and any combination thereof to form a treated lignocellulosic material having a viscosity equal to or less than about 17 cp and having reducing functional groups selected from the group consisting of aldehyde and aldehyde type functional groups at the C6 and C1 positions but predominating at the C1 position.
    Type: Grant
    Filed: May 2, 2006
    Date of Patent: August 30, 2011
    Assignee: International Paper Company
    Inventors: Zheng Tan, Damaris Lorenzoni, Gopal Goyal
  • Patent number: 7972476
    Abstract: This invention relates to a method for the production of a tissue paper web, which is produced from a pulp suspension having fibers. The method according to the present invention is characterized in that the pulp suspension is formed, at least partly by, a pulp suspension fraction obtained through the treatment of old paper, has a refining degree of less than 30° SR and is of such condition that a laboratory sheet according to TAPPI 205 SP 95 (Rapid Köthen), whose breaking length measured according to TAPPI 220 and TAPPI 494 is 4.0 km or more, is produced therefrom.
    Type: Grant
    Filed: October 13, 2006
    Date of Patent: July 5, 2011
    Assignee: Voith Patent GmbH
    Inventors: Thomas Scherb, Luiz Carlos Silva, Rogerio Berardi, Danilo Oyakawa
  • Publication number: 20110155336
    Abstract: Disclosed is a method for increasing the concentration of xylose in lignocellulosic hydrolysate. The method includes the step of extruding lignocellulosic material and mixing the lignocellulosic material with diluted acid and the step of conducting hot-water extraction on the mixture. Hence, the concentration of the xylose in the lignocellulosic hydrolysate can achieve a high concentration of 60 g/L, and the yield of the xylose can reach to 90%.
    Type: Application
    Filed: December 31, 2009
    Publication date: June 30, 2011
    Applicant: ATOMIC ENERGY COUNCIL-INSTITUTE OF NUCLEAR ENERGY RESEARCH
    Inventors: Wen-Hua Chen, Sheng-Shieh Chen, Wen-Song Hwang, Lee-Chung Men, Jia-Baau Wang
  • Patent number: 7943009
    Abstract: A process of treating a lignocellulosic material includes a pre-extraction step in which hemicellulose is extracted from the lignocellulosic material. In one embodiment, the pre-extraction step involves contacting the lignocellulosic material with an aqueous solution under conditions that release acidic material from the lignocellulosic material into the aqueous solution, and the aqueous solution includes a basic material that at least partly neutralizes the acidic material so that the aqueous solution at the end of the pre-extraction step has a pH within a range of from 4.5 to 11. The process also includes a pulping step, after the pre-extraction step, in which the lignocellulosic material is separated into pulp. The process further includes an adsorption step, after the pulping step, in which hemicellulose is adsorbed on the pulp.
    Type: Grant
    Filed: December 30, 2009
    Date of Patent: May 17, 2011
    Assignees: University of Maine System Board of Trustees, International Paper Company
    Inventors: Adriaan Reinhard Pieter van Heiningen, Sung-Hoon Yoon, Haixuan Zou, Jianer Jiang, Gopal C. Goyal
  • Publication number: 20110073264
    Abstract: The method of the present invention is directed towards a method to increase the pulp yield of a lignocellulosic material, or increasing pulp bulk and/or pulp viscosity. This method comprises the following steps; preparing a lignocellulosic material, contacting the lignocellulosic material in a vessel with hot water or steam for a predetermined time, producing acetic acid from the reaction of the hot water or steam and the lignocellulosic material, lowering the pH to less than about 4, removing lignocellulosic material extracts including a large percentage of hemicellulose, acetic acid and metal ions, exposing contacted lignocellulosic material to pulping chemicals in a pulping reactor, forming a contacted lignocellulosic material pulp with a kappa number below about 19 after about 90 minutes of contact with the pulping chemicals, exposing the contacted lignocellulosic material pulp to whitening agents, and producing a whitened hot water contacted lignocellulosic material pulp.
    Type: Application
    Filed: August 12, 2010
    Publication date: March 31, 2011
    Applicant: The Research Foundation of State University of New York
    Inventors: Shijie Liu, Gangesh Mishra, Thomas E. Amidon, Kathryn E. Gratien, Jennifer A. Putnam
  • Patent number: 7914646
    Abstract: Oxidative compositions and processes that preserve and enhance the brightness and improve color of pulp or paper when applied during different stages of the papermaking process are identified. The oxidative composition and method maintains and/or enhances brightness, prevents yellowing, and enhances the performance of paper products. Used in combination with optical brighteners and/or chelants the oxidative agents produce a synergistic effect not previously identified in the paper process.
    Type: Grant
    Filed: July 21, 2006
    Date of Patent: March 29, 2011
    Assignee: Nalco Company
    Inventors: Prasad Y. Duggirala, Sergey M. Shevchenko, Katherine M. Broadus
  • Patent number: 7850821
    Abstract: A household thin paper, that offers flexibility and further difficulty in tearing, comprising a polyester-based compound represented by General Formula (1): wherein R1 is HO— or HO(R2O)a-, R2 is an alkylene group having 2 or 3 carbon atoms, only a single type of R2O or two types of R2O can be attached randomly or as a block, “a” is 1 to 200, all “a”s may be same or different in an identical molecule, b is 2 to 100, and R3 is a hydrogen atom or the like.
    Type: Grant
    Filed: August 24, 2005
    Date of Patent: December 14, 2010
    Assignee: Daio Paper Corporation
    Inventors: Tetsuya Uehara, Akira Hirasawa, Hiroshi Ono, Abdolreza Nezamoleslami, Kazuaki Fujimori
  • Patent number: 7837830
    Abstract: The invention relates to a paper product having 0.1 to 10 percent of an acid treated seed based fiber material incorporated into the paper making composition. The remainder of the paper product can be pulp fibers, for example wood fibers. The seed based fiber material is present on the surface of the pulp fibers and imparts certain properties to the paper product formed from it.
    Type: Grant
    Filed: April 22, 2005
    Date of Patent: November 23, 2010
    Assignee: Cargill, Incorporated
    Inventors: Jagannadh V. Satyavolu, David E. Garlie, Kevin R. Anderson, John T. McDonald, Paula R. Krogmann
  • Publication number: 20100269994
    Abstract: The present invention relates to a method for treating pectin-containing ligno-cellulosic raw materials in a high-yield pulping process utilizing one or more treatment stages at alkaline conditions. The invention provides a method for controlling the alkaline treatment step, wherein the alkali is applied at a low temperature treatment stage before one or more consecutive treatment stages at the same or higher temperature. The present invention also provides pulp, paper, board or tissue obtained with said method.
    Type: Application
    Filed: October 15, 2008
    Publication date: October 28, 2010
    Inventors: Andrey Pranovich, Bjarne Holmbom, Jonas Konn
  • Patent number: 7807021
    Abstract: In general, the present disclosure is directed to compositions and processes to increase pulp yield, reduce extractives, and reduce scaling in a chemical pulping process. In one particular embodiment, for instance, the present disclosure is directed to a composition comprising a surface active agent, an alkaline mixture, at least one polymer, the polymer having a linear backbone segment having two ends, at least one phosphorus component, the phosphorus component chemically linked along the linear backbone segment of the polymer, and at least one end component, the end component chemically linked to one or both ends of the linear backbone segment of the polymer.
    Type: Grant
    Filed: June 21, 2006
    Date of Patent: October 5, 2010
    Inventors: Michael M. Blackstone, Atif M. Dabdoub
  • Publication number: 20100107473
    Abstract: Novel dehydrin promoters isolated from Eucalyptus dunnii and Eucalyptus macarthurii are cold-inducible and can be used for driving CBF genes in plants, including trees, to enhance tolerance to freezing temperatures or water stress and reduce undesirable effects associated with CBF gene expression.
    Type: Application
    Filed: March 28, 2008
    Publication date: May 6, 2010
    Inventors: Chunsheng Zhang, Kimberly Ann Winkeler, Samantha Abigail Miller, Teresa Vales, Kirk Foutz, Yuan Zhao, Marion Wood
  • Patent number: 7648032
    Abstract: Disclosed herein are a method of reductively bleaching a mineral slurry comprising adding in the mineral slurry an effective amount of a formamidine sulfinic acid (FAS) and an effective amount of a borohydride to reductively bleach the mineral slurry, compositions comprising a mineral slurry, a FAS, and a borohydride, and final products comprising a mineral obtained by the method disclosed herein.
    Type: Grant
    Filed: March 22, 2005
    Date of Patent: January 19, 2010
    Assignee: Imerys Pigments, Inc.
    Inventors: Jun Yuan, Robert J. Pruett, Larry C. Powell
  • Publication number: 20100006246
    Abstract: The invention relates to a process for increasing bulk of a fiber product, in which process a fiber pulp, and further a fiber product, is formed. In accordance with the invention, in a first step a carbonate compound is added to the fiber pulp as a basic component, and in a second step acid is added as an acidic component, in order to form salt, to provide the formation of small-bubbled gas, and to increase the bulk, and the fiber pulp is dehydrated. The invention also relates to a corresponding fiber product and to the use thereof.
    Type: Application
    Filed: July 10, 2007
    Publication date: January 14, 2010
    Applicant: Fibertus OY
    Inventor: Mikko Juhani Kaira
  • Patent number: 7638016
    Abstract: The present invention relates to a method of increasing the brightness of pulp, pulp made from such methods and methods of using such pulp.
    Type: Grant
    Filed: June 2, 2006
    Date of Patent: December 29, 2009
    Assignee: International Paper Company
    Inventor: Xuan Truong Nguyen
  • Publication number: 20090264036
    Abstract: Provided is a nanofiber sheet that sufficiently refined by fibrillation and has high crystallinity of cellulose fiber and can realize a fiber-reinforced composite material exhibiting high transparency, a high elastic modulus, a low coefficient of linear thermal expansion, and high heat resistance and being high in flatness and smoothness. This nanofiber sheet includes crystalline cellulose as the main component and a lignin in an amount of from 10 ppm to 10 wt %. When a fiber/resin composite material obtained by impregnating the nanofiber sheet with tricyclodecane dimethacrylate, subjecting the impregnated product to UV-curing at 20 J/cm2, and heating the cured product in vacuum at 160° C. for two hours includes 60 wt % of the cured tricyclodecane dimethacrylate and 40 wt % of nanofiber, the following physical characteristics (i) to (iii) are satisfied: (i) the parallel light transmittance of light of a wavelength of 600 nm at a sheet thickness of 100 ?m is 70% or more; (ii) the Young's modulus is 5.
    Type: Application
    Filed: July 13, 2007
    Publication date: October 22, 2009
    Applicants: Nippon Telegraph and Telephone Corporation, Pioneer Corporation, Hitachi, Ltd., Mitsubishi Chemical Corporation, Rohm Co., Ltd.
    Inventors: Hiroyuki Yano, Masaya Nogi, Shinsuke Ifuku, Kentarou Abe, Keishin Handa
  • Patent number: 7585387
    Abstract: An oxidative solution (Ox-B, a solution of no less than 5:1 sodium hypochlorite: hydrogen peroxide) was found to remove both lignin and hemicellulose from sugarcane bagasse. After treatment the cellulosic residue readily separated from the lignin and hemicellulose by sedimentation. The residue (the pulp) contained up to 80% by weight cellulose, and was easily degradable by cellulase enzyme. A treatment of oxidation with low concentrations of Ox-B, followed by a caustic wash, produced a cellulose residue that was able to be almost completely hydrolyzed to simple sugars by cellulase. Due to the low amount chemical used and the efficiency of the degradation, this process has commercial potential.
    Type: Grant
    Filed: March 8, 2006
    Date of Patent: September 8, 2009
    Assignee: Board of Supervisors of Louisiana State University And Agricultural and Mechanical College
    Inventors: Donal F. Day, Chang-Ho Chung
  • Publication number: 20090165969
    Abstract: Bleached and unbleached pulps are treated with an enzyme in one or more stages of the bleaching process to yield a low DP pulp suitable for lyocell manufacture. This allows higher throughput of fiber an economy of manufacture.
    Type: Application
    Filed: December 31, 2007
    Publication date: July 2, 2009
    Applicant: Weyerhaeuser Co.
    Inventor: Mengkui Luo
  • Patent number: 7501043
    Abstract: The method is for the pre-treatment of chips that are fed to a sulphate cooking process. Through the addition of an acidic fluid to the steam treatment step, a very high ionic concentration of hydrogen ions is achieved. When the chips are subsequently formed into a slurry with a preferably sulphide-rich alkali cooking fluid, H2S is formed locally in the chips, which gives a yield-increasing effect for the subsequent cooking step of l-3%.
    Type: Grant
    Filed: April 7, 2004
    Date of Patent: March 10, 2009
    Assignee: Metso Fiber Karlstad AB
    Inventors: Vidar Snekkenes, Krister Olsson
  • Patent number: 7445691
    Abstract: The method is for pre-treatment of chips that are fed to a sulphate cooking process. Through acidification of the chips in an acidic treatment fluid with a subsequent draining of free treatment fluid before subsequent steaming or wet-steaming, a high concentration of free hydrogen ions is established within the chip pieces. When the chips are subsequently formed into slurry with preferably a sulphide-rich alkali cooking fluid, H2S is formed locally in the chip pieces which gives a yield-increasing effect in the subsequent cooking step of 1-3%.
    Type: Grant
    Filed: March 25, 2004
    Date of Patent: November 4, 2008
    Assignee: Metso Fiber Karlstad AB
    Inventors: Vidar Snekkenes, Krister Olsson
  • Patent number: 7396434
    Abstract: 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: Grant
    Filed: June 3, 2004
    Date of Patent: July 8, 2008
    Inventors: Jose Antonio Rodriguez Rivera, Kelly Anthony O'Flynn
  • Patent number: 7390378
    Abstract: 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: Grant
    Filed: July 16, 2004
    Date of Patent: June 24, 2008
    Assignee: Georgia-Pacific Consumer Products LP
    Inventors: Jeffrey R. Carels, Robert L. de Jong, Daniel W. Sumnicht, Jeffrey A. Lee