Producing Paper Pulp Patents (Class 435/278)
-
Patent number: 6812010Abstract: The invention concerns a method for enzymatic preparation of homogentisate (HMO) from 4-hydroxypyruvate (HPP), characterized in that it consists in carrying out in a suitable reaction medium the following enzymatic reactions: enzymatic conversion of HPP into 4-hydroxyphenylacetate (HPA) with a first appropriate enzyme; then an enzymatic conversion of HPA into HMO with a second appropriate enzyme.Type: GrantFiled: October 13, 2000Date of Patent: November 2, 2004Assignee: Aventis Cropscience SAInventors: Richard Derose, Alain Sailland
-
Publication number: 20040163780Abstract: The present invention relates to a biopulping method, and more particularly to a biopulping method for non-woody fiber plants. A biopulping method for a non-woody fiber plant is provided. It includes steps of providing a culture solution, adding a non-woody fiber plant to the culture solution, adding a microorganism suspension to the culture solution, fermentatively culturing the culture solution for preparing a pulp solution, boiling the pulp solution, pulping the pulp solution, and screening the pulp solution for isolating the paper pulp from the pulp solution.Type: ApplicationFiled: February 20, 2004Publication date: August 26, 2004Applicant: Yuen Foong Yu Paper MFG Co. Ltd.Inventors: Jenn-Wen Huang, Yu-Hsiang Peng
-
Patent number: 6767728Abstract: A method and composition for deinking noncontact-printed wastepaper, particularly xerographic and laser-printed paper, and mixtures of contact and noncontact-printed wastepaper, using an enzyme mixture characterized by a high ratio of &bgr;-glucosidase activity to filter paper units (FPU) activity. The present invention also relates to an assay for evaluating enzymes for use in deinking wastepaper based on the ratio of &bgr;-glucosidase activity to FPU activity.Type: GrantFiled: October 22, 2001Date of Patent: July 27, 2004Assignee: University of Georgia Research Foundation, Inc.Inventors: Jan L. Yang, Jiahua Ma, J. Michael Pierce, Karl-Erik L Eriksson
-
Publication number: 20040104003Abstract: In a new process for preparing pulped wood chips for paper making, chips from a hardwood such as eucalyptus are inoculated with a living culture of one or more white rot fungi. The fungi propagate throughout the body of the wood chip, selectively attacking the lignin of the wood without harming the cellulosic fibers. Subsequent kraft pulping with standard chemicals results in less chemical usage, reduced utilization of energy, improved strength, and reduced cooking time.Type: ApplicationFiled: August 29, 2003Publication date: June 3, 2004Applicants: Biopulping International, Inc., Thapar Centre for Industrial Research & DevelopmentInventors: Pratima Bajpai, Pramod K. Bajpai, Masood Akhtar
-
Publication number: 20040077071Abstract: The present invention discloses methods of bleaching chemical pulp with xylanase after chemical bleaching. The method comprises the steps of treating chemical pulp with a first xylanase in a first enzyme treatment stage to produce an enzyme treated pulp, exposing the enzyme treated pulp to a chemical bleaching stage to produce a partially bleached pulp, and treating the partially bleached pulp with a second xylanase in a second enzyme treatment stage at a pH of about 3 to about 8. Further, there is disclosed a method of bleaching pulp comprising the steps of exposing chemical pulp to a chlorine dioxide bleaching stage to produce a partially bleached pulp, treating the partially bleached pulp with a xylanase in an enzyme treatment stage at a pH of about 3 to about 8, then carrying out an alkaline extraction of the pulp. The pulp bleaching method of the present invention may be performed in a pulp mill as part of a complex pulp bleaching process.Type: ApplicationFiled: November 12, 2003Publication date: April 22, 2004Inventors: Jeffrey S. Tolan, Corina Popovici, Luc Thibault
-
Publication number: 20040069426Abstract: The present invention concerns a method for enzymatic treatment of lignocellulosic materials which contain xylan-polymers, such as cellulose kraft pulps. According to a method of the present kind, at least a part of the hexenuronic acid groups present in the material is selectively removed in order to remove metal ions from the pulp, to change the surface charge thereof, to improve the brightness stability of the pulp and to render the material more suitable for enzymatic treatment.Type: ApplicationFiled: February 6, 1997Publication date: April 15, 2004Inventors: MATTI SIIKA-AHO, JOHANNA BUCHERT, TAPANI VUORINEN, ANITA TELEMAN, MAIJA TENKANEN, MICHAEL BAILEY, LIISA VIIKARI
-
Publication number: 20040033580Abstract: The present invention provides thermophilic alkaliphilic bacteria and thermostable alkaline polypeptides obtainable therefrom. It also provides a method for producing polypeptides according to the invention, nucleic acids encoding such polypeptides and compositions comprising such polypeptides. It also relates to the use of enzymes obtainable from these novel organisms in the detergent industry, the paper and pulp industry and the textile industry.Type: ApplicationFiled: June 18, 2002Publication date: February 19, 2004Inventors: Brain E. Jones, Margareta A. Herweijer, Michael J. Danson, David W. Hough, Carl R. Thompson
-
Publication number: 20040011485Abstract: The present invention relates to an environment friendly, safe, and efficient four-step method of bio-bleaching Kraft pulp using bacterial strains of accession no. MTCC 5096, MTCC 5094, MTCC 5095, and MTCC 5098, a microbial consortium comprising a synergistic mixture of ligninolytic bacterial isolates of accession no. MTCC 5094, MTCC 5095, and MTCC 5098, bacterial strains of accession Nos. MTCC 5096, MTCC 5094, MTCC 5095, and MTCC 5098, and a process of preparing an inoculum of the bacterial isolate of accession no. MTCC 5096, further, a process for the preparation of a consortium comprising the ligninolytic bacterial isolates of accession nos. MTCC 5094, MTCC 5095, and MTCC 5098, in addition, a process for the preparation of pulp suspension for the bio-bleaching.Type: ApplicationFiled: March 21, 2003Publication date: January 22, 2004Applicant: Council of Scientific and Industrial ResearchInventors: Rita Kumar, Anil Kumar
-
Publication number: 20040001904Abstract: Two cellobiohydrolase polypeptides (CBHA and CBHB) derived from Aspergillus are described and can be used to degrade cellulose. Variants of these peptides are described as well as DNA encoding the peptides, vectors and host cells. The peptides can be used to produce or process food, animal feed, wood pulp, paper and textiles.Type: ApplicationFiled: February 28, 2003Publication date: January 1, 2004Inventors: Marcus Matheus Catharina Gielkens, Jacob Visser, Leendert Hendrik De Graaff
-
Patent number: 6664088Abstract: A method of producing vanillin comprising the steps of: (1) providing trans-ferulic acid or a salt thereof; and (2) providing trans-ferulate: CoASH ligase activity (enzyme activity I), trans-feruloyl ScoA hydratase activity (enzyme activity II), and 4-hydroxy-3-methoxyphenyl-&bgr;-hydroxy-propionyl SCoA (HMPHP SCoA) cleavage activity (enzyme activity III). Conveniently the enzymes are provided by Pseudomonas fluorescens Fe3 or a mutant or derivative thereof. Polypeptides with enzymes activities II and III and polynucleotides encoding the polypeptides. Use of the polypeptides or the polynucleotides in a method for producing vanillin is also provided.Type: GrantFiled: December 7, 2000Date of Patent: December 16, 2003Assignee: Plant Bioscience LimitedInventors: Arjan Narbad, Michael John Charles Rhodes, Michael John Gasson, Nicholas John Walton
-
Patent number: 6635146Abstract: Papermaking fibers are treated with certain hydrolytic enzymes, specifically including cellulases, such as truncated endo-glucanases, which have been freed of their cellulose binding domain, to generate aldehyde groups at or near the surface of the fibers. Paper sheets made from the resulting fibers exhibit improved strength characteristics relative to paper sheets made from untreated fibers.Type: GrantFiled: August 29, 2001Date of Patent: October 21, 2003Assignee: Kimberly-Clark Worldwide, Inc.Inventors: Werner Franz Wilhelm Lonsky, Alberto Ricardo Negri
-
Patent number: 6627430Abstract: The present invention relates to a process for the cultivation of chitin/chirosanrich, filamentous fungi with capacity to assimilate mannose as well as xylose, galactose, and glucose, wherein the cultivation of the filamentous fungi in a liquid medium extracted from wood in the production of paper whereupon the said filamentous fungi are recovered from the medium.Type: GrantFiled: October 15, 2001Date of Patent: September 30, 2003Inventor: Lars Edebo
-
Patent number: 6613192Abstract: A method for producing paper pulp for use in the making of paper from eucalyptus wood chips. The method comprises inoculating wood chips with white rot fungi, fermenting the wood chips so as to cause a propagation of the fungus through the wood chips and allowing the fungus to modify the lignin, and pulping the degraded wood chips by a kraft process.Type: GrantFiled: November 28, 2000Date of Patent: September 2, 2003Assignees: Biopulping International, Inc., Thapar Centre for Industrial Research & DevelopmentInventors: Pratima Bajpai, Pramod K. Bajpai, Masood Akhtar
-
Patent number: 6610172Abstract: A process for producing paper materials having improved wet strength. This process involves (a) preparing a suspension of unbleached or semi-bleached chemical or semichemical pulp or pulp from recycled fibers; (b) treating the pulp with a phenol-oxidizing enzyme and a mediator; and (c) de-watering the treated pulp in a paper making machine to remove process water and produce the paper material. Preferably, the paper material is heated after the completion of step (c). By the process of the invention, the wet strength of paper materials can be improved without using wet strength resins which makes the product more easily re-used. Further disclosed is a process for producing corrugated paperboard or corrugated containers.Type: GrantFiled: March 21, 2000Date of Patent: August 26, 2003Assignee: Novozymes A/SInventors: Martin Lund, Claus Felby
-
Patent number: 6576083Abstract: In the production of pulp and paper from starch-containing paper, the deinking effect can be improved by including treatment with both a starch-degrading enzyme and a pectate lyase. The process comprises enzyme treatment during or after disintegration of the paper to produce pulp, followed by separation of ink particles.Type: GrantFiled: April 5, 2001Date of Patent: June 10, 2003Assignee: Novozymes A/SInventors: Neal Franks, Kelly Page
-
Publication number: 20030102095Abstract: Enzyme-treated papermaking sludges are provided, as are methods of making the enzyme-treated sludge. Papermaking processes that incorporate the enzyme-treated papermaking sludges into papermaking pulp are also provided as are paper and paperboard products made from the resultant pulp.Type: ApplicationFiled: November 29, 2001Publication date: June 5, 2003Inventors: Walter B. Hill, Brian G. Hart, Lowell F. Lott, Robert J. Turnbull, James W. Fitzhenry, Daniel E. Glover, Philip M. Hoekstra
-
Publication number: 20030094251Abstract: A two-component mediator system is disclosed, wherein one component serves as a pro-oxidant and the other component serves as a pro-degradant and booster. When used in combination with a laccase, the two-component mediators enhance the bleaching of pulp. In addition, a composition comprising an oxidative enzyme, a pro-oxidant, and a pro-degradant, and a process for oxidizing a substrate that comprises treating the substrate with an oxidizing enzyme, a pro-oxidant, and a pro-degradant are disclosed. The pro-oxidant can be ascorbic acid, ascorbate, salicylic acid, salicylate, nicotinic acid, nicotinate, a hardwood black liquor, a softwood black liquor, ligno-organosolv, lignin sulfonate, or mixtures thereof. The pro-degradant can be urea, thiourea, sulfamic acid, sulfamide, guanidine, methylsulfonic acid, or mixtures thereof.Type: ApplicationFiled: December 20, 2001Publication date: May 22, 2003Inventors: Huai N. Cheng, Simon Delagrave, Qu-Ming Gu, Dennis J. Murphy
-
Publication number: 20030089472Abstract: A composition comprising an enzyme exhibiting laccase activity and an enzyme enhancing agent, also referred to as a mediator, is disclosed. A process for oxidizing a substrate that comprises treating the substrate with a composition comprising an enzyme exhibiting laccase activity and an enzyme enhancing agent is disclosed. The process when used on lignin-containing material bleaches the lignin-containing material. A process for enhancing the activity of an enzyme exhibiting laccase activity that comprises adding an enzyme enhancing agent to the enzyme is also disclosed.Type: ApplicationFiled: December 20, 2001Publication date: May 15, 2003Inventors: Huai N. Cheng, Simon Delagrave, Qu-Ming Gu, Daniel Michalopoulos, Dennis J. Murphy
-
Publication number: 20030047295Abstract: A process of oxidizing a substrate is disclosed. The process comprising the step of treating the substrate with an oxidizing enzyme, a mediator that enhances the oxidative activity of the enzyme, and a chain transfer agent. In one example, the substrate is a lignin-containing material and the process results in bleaching of the lignin-containing material. Examples of some useful enzymes are laccase, catechol oxidase, monophenol monooxygenase, and bilirubin oxidase. A composition comprising an oxidative enzyme, a mediator that enhances the oxidative activity of the enzyme, and a chain transfer agent is also disclosed.Type: ApplicationFiled: December 20, 2001Publication date: March 13, 2003Inventors: Huai N. Cheng, Simon Delagrave, Qu-Ming Gu, Dennis J. Murphy
-
Publication number: 20020174962Abstract: Lignocellulose pulp is bleached by bleaching a pulp in aqueous alkali solution with oxygen and treating the pulp with a hemicellulase, while a liquid fraction delivered from the enzyme treatment step is separated from the hemicellulase treated reaction mixture, and subjected to a penetration treatment through a separation membrane, for example, reverse osmosis membrane, to separate a permeated fraction from a non-permeated fraction; the permeated fraction is fed to the alkali-oxygen bleaching (oxygen delignification) step and is used as a liquid medium of the bleaching system.Type: ApplicationFiled: April 22, 2002Publication date: November 28, 2002Inventors: Yoshiya Izumi, Jun Sugiura, Hitoshi Kagawa, Naoya Azumi
-
Patent number: 6468391Abstract: Sanitary paper with improved softness (lower stiffness) can be obtained without significant loss of paper strength by using a papermaking pulp which is treated with a certain type of cellulase component. The cellulase component in question is characterized by not containing a cellulose-binding domain (CBD), and is more effective for making softer sanitary paper than a conventional cellulase preparation which contains a mixture of various cellulase components with and without a CBD.Type: GrantFiled: June 25, 1998Date of Patent: October 22, 2002Assignee: Novozymes A/SInventors: Masaki Sharyo, Hiromichi Sakaguchi, Masahiro Ohishi, Mamoru Takahashi, Katsunori Kida, Hitoshi Tamagawa, Martin Schulein, Neal Franks
-
Patent number: 6465218Abstract: The yield of active polysaccharides contained in Agaricus blazei, such as &bgr;-glucan, can be improved, by decomposing and treating the mycelium or fruit body of Agaricus blazei or a liquid waste of the culture of the mycelium with an enzymatic agent principally comprising hemicellulase. By increasing the concentrations of the active of the biologically active substance of the present invention after the incorporation thereof into bodies is prominently elevated, so that the active substance can exert excellent immune activation effect on cancers and other adult diseases.Type: GrantFiled: January 6, 2000Date of Patent: October 15, 2002Assignee: Japan Applied Microbiology Research Institute Co., Ltd.Inventors: Isao Horiuchi, Takeru Suyama, Tsunehisa Morio
-
Patent number: 6465203Abstract: The present invention provides methods of making paper, utilizing glucans, produced by the glucosyltransferase B, C or D enzyme of the species Streptococcus mutans, instead of modified starches. The present glucans are functionally similar to currently utilized modified starches and are particularly useful in the coating step of paper manufacture. The present glucans also exhibit thermoplastic properties and impart gloss to the paper during the coating step.Type: GrantFiled: December 19, 2000Date of Patent: October 15, 2002Assignee: Pioneer Hi-Bred International, Inc.Inventor: Scott E. Nichols
-
Publication number: 20020142452Abstract: A method and composition for deinking noncontact-printed wastepaper, particularly xerographic and laser-printed paper, and mixtures of contact and noncontact-printed wastepaper, using an enzyme mixture characterized by a high ratio of &bgr;-glucosidase activity to filter paper units (FPU) activity. The present invention also relates to an assay for evaluating enzymes for use in deinking wastepaper based on the ratio of &bgr;-glucosidase activity to FPU activity.Type: ApplicationFiled: October 22, 2001Publication date: October 3, 2002Inventors: Jan L. Yang, Jianhua Ma, J. Michael Pierce, Karl-Erik L. Eriksson
-
Patent number: 6426211Abstract: A purified xylanase derived from B. Pumilus PRL B12 is disclosed. This xylanase is efficient for use in the biobleaching of wood pulp, permitting a strong reduction in the quantity of chlorine used and AOX compounds produced in classical and ECF wood pulp bleaching sequences as well as the quantity of ozone used in TCF sequences. The gene coding for the xylanase was isolated and purified and used to construct an expression vector therefor. A recombinant host strain of B. licheniformis is also disclosed which is efficient for expressing heterologous enzymes, including the xylanase when transformed by the expression vector.Type: GrantFiled: May 5, 1998Date of Patent: July 30, 2002Assignee: Genencor International Inc.Inventors: Eric de Buyl, Andrée Lahaye, Pierre Ledoux, Antoine Amory, René Detroz, Christophe Andre, Roman Vetter
-
Publication number: 20020096273Abstract: The invention relates to the use of fungi stains of Ophiostoma floccosum, Ophiostoma piceae or Ophiostoma pluruanulatum, or mixtures on wood and pulp to improve chemical pulping processes and/or reduce cooking tie and/or improve brightness and/or decrease extractives.Type: ApplicationFiled: March 30, 2001Publication date: July 25, 2002Inventor: Roberta Lee Farrell
-
Publication number: 20020088575Abstract: Papermaking fibers are treated with certain hydrolytic enzymes, specifically including cellulases, such as truncated endo-glucanases, which have been freed of their cellulose binding domain, to generate aldehyde groups at or near the surface of the fibers. Paper sheets made from the resulting fibers exhibit improved strength characteristics relative to paper sheets made from untreated fibers.Type: ApplicationFiled: August 29, 2001Publication date: July 11, 2002Applicant: Kimberly-Clark Worldwide, Inc.Inventors: Werner Franz Wilhelm Lonsky, Alberto Ricardo Negri
-
Publication number: 20020084047Abstract: Pulp is treated with a hemicellulase, e.g. a xylanase such as that derived from Bacillus sp. SD902, prior to being chemically modified. This results in excellent cellulose derivatives that could not be obtained by any conventional methods. Specifically, the cellulose derivatives produced by this method have improved filterability and increased water-solubility. In addition, according to this method, the formation of microgel is minimized, and the distribution of the substituents in the cellulose derivatives through the intramolecular substitution in the method is made more uniform.Type: ApplicationFiled: August 10, 1999Publication date: July 4, 2002Applicant: Novozymes A/SInventors: YOSHITAKA NOGUCHI, MOTOAKI KAMACHI
-
Publication number: 20020086410Abstract: The present invention relates to a novel sphingolipid ceramide N-deacylase (SCDase) having a wide substrate specificity; a method for enzymatically producing a lysosphingolipid or a sphingolipid derivative using the SCDase which is useful in the fields of medicine, carbohydrate engineering, cell engineering, and the like; the lysosphingolipid or sphingolipid derivative obtained by this production method; a gene which encodes a polypeptide having an SCDase activity useful in sphingolipid technology; a method for industrially producing a polypeptide having an SCDase deacylase activity and a recombinant polypeptide thereof using a transformant to which the gene is introduced; a probe or primer which hybridizes to the gene; and an antibody or a fragment thereof which specifically binds to the polypeptide.Type: ApplicationFiled: September 25, 1998Publication date: July 4, 2002Inventors: MAKOTO ITO, TOYOHISA KURITA, KATSUHIRO KITA, NORIYUKI SUEYOSHI, SUSUMU MITSUTAKE, MASANORI FUJITA, NOZOMU OKINO, HIROYUKI IZU, IKUNOSHIN KATO
-
Patent number: 6410290Abstract: Catalase enzymes derived from bacteria from the genera Alcaligenes (Deleya) and Microscilla are disclosed. The enzymes are produced from native or recombinant host cells and can be utilized to destroy or detect hydrogen peroxide, e.g., in production of glyoxylic acid and in glucose sensors, and in processes where hydrogen peroxide is used as a bleaching or antibacterial agent, e.g. in contact lens cleaning, in bleaching steps in pulp and paper preparation and in the pasteurization of dairy products.Type: GrantFiled: October 5, 1999Date of Patent: June 25, 2002Assignee: Diversa CorporationInventors: Dan E. Robertson, Indrajit Sanyal, Robert S. Adhikary
-
Patent number: 6399351Abstract: A novel pectate lyase belonging to a novel family of polysaccharide lyases has good performance in industrial processes under neutral or alkaline conditions such as laundering and textile processing. The pectate lyase may be derivable from Bacillus species.Type: GrantFiled: March 15, 2000Date of Patent: June 4, 2002Assignee: Novozymes A/SInventors: Mads Eskelund Bjørnvad, Jens Toenne Andersen, Kirk Schnorr, Martin Schülein, Lars Kongsbak
-
Patent number: 6379948Abstract: Pulp bleaching method using SKB-1152 strain which is a lignin-degrading strain having high lignin degrading activity and pulp bleaching activity, or the culture produced using the SKB-1152. When the SKB-1152 strain of this invention or the culture produced using the same is to bleach pulp, the same bio-bleaching method as in the prior report may be used and there is no need for any special culture conditions. The SKB-1152 strain of the invention can be collected from decolorized areas formed in a culture rue medium which contains, lignin and/or pulp containing residual lignin, and being inoculated with a isolating source sample and cultured.Type: GrantFiled: May 22, 1995Date of Patent: April 30, 2002Assignee: Nippon Seishi Kabushiki KaishaInventors: Takeshi Iimori, Reiji Kaneko, Hiroshi Yoshikawa, Makoto Machida
-
Patent number: 6379495Abstract: Process for the production of cellulose paper pulps from vegetable masses, comprising the steps of mixing and conditioning a vegetative mass suitable to form a culture medium with an inoculum constituted of edible ligninolythic mushrooms, such as Lentinus edodes, Pleurotis Peryngii, Psajor-caju, and the like; extracting the so-obtained enzyme and adding it to the vegetative material for the production of paper pulp, mainly constituted of cultivated annual plants such as kenaf, hemp, flax, cotton and various stems and/or agricultural-industrial residues, such as cereal straws, maize stalks, and the like; conditioning and causing the mass to react; and lastly washing the mass after the biological attack, obtaining in this way a cellulose pulp to be submitted to possible mild final cooking and bleaching treatment. Apparatus for the realiztion of the process, and cellulose pulps obtained by biodelignification of cultivated annual plants and/or agricultural-industrial residues.Type: GrantFiled: October 19, 1998Date of Patent: April 30, 2002Assignees: Consiglio Nazionale Delle Ricerche, Universita' Studi Della TusciaInventors: Giovanni Giovannozzi Sermanni, Pier Luigi Cappellletto, Ruggero Baldo, Antonio Porri, Alessandro D'Annibale, Claudio Perani
-
Patent number: 6346407Abstract: The invention relates to a xylanase originating from a Bacillus strain and particularly to Bacillus sp. strain 720/1 (LMG P-14798) and to xylanase obtained from derivatives and mutants of this strain. The xylanase of the invention is active over a wide range of acid and basic pH. This invention also relates to uses of the xylanases and enzyme compositions comprising the xylanases.Type: GrantFiled: June 6, 1995Date of Patent: February 12, 2002Assignee: Genencor International, Inc.Inventors: Eric De Buyl, Andrée Lahaye, Pierre Ledoux, René Detroz
-
Patent number: 6333181Abstract: This invention presents a method of improving enzymatic degradation of lignocellulose, as in the production of ethanol from lignocellulosic material, through the use of ultrasonic treatment. The invention shows that ultrasonic treatment reduces cellulase requirements by ⅓ to ½. With the cost of enzymes being a major problem in the cost-effective production of ethanol from lignocellulosic material, this invention presents a significant improvement over presently available methods.Type: GrantFiled: April 7, 1997Date of Patent: December 25, 2001Assignee: University of Florida Research Foundation, Inc.Inventors: Lonnie O. Ingram, Brent E. Wood
-
Patent number: 6332951Abstract: A method and a device for measuring the content of chemicals used in connection with bleaching of preferably cellulose fibers in a pulp, suspension for the purpose of providing a better and more uniform product quality and preventing overdosage of the bleaching chemical used. According to the invention a measurement sample is derived from a predetermined volume of the pulp suspension after or during the bleaching. Further, a catalyst in the shape of the enzyme catalase is added to the sample, which is agitated so that the bleaching chemical is decomposed and oxygen gas is generated, which oxygen gas pushes out a certain sample volume for the measurement sample, which sample volume is directly or indirectly converted, e.g. via a simple algorithm, to a value representing the content of the bleaching chemical used.Type: GrantFiled: June 21, 1999Date of Patent: December 25, 2001Assignee: BTG Källe Inventing ABInventors: Gerdt Fladda, Stig Norder, Bertil Olsson
-
Patent number: 6284479Abstract: The present invention provides methods of making paper, utilizing glucans, produced by the glucosyltransferase B, C or D enzyme of the species Streptococcus mutans, instead of modified starches. The present glucans are functionally similar to currently utilized modified starches and are particularly useful in the coating step of paper manufacture. The present glucans also exhibit thermoplastic properties and impart gloss to the paper during the coating step.Type: GrantFiled: December 11, 1998Date of Patent: September 4, 2001Assignee: Pioneer Hi-Bred International, Inc.Inventor: Scott E. Nichols
-
Patent number: 6258209Abstract: Multi-component system for modifying, degrading or bleaching lignin, lignin-containing materials or similar substances, includes (a) if appropriate at least one oxidation catalyst; (b) at least one suitable oxidizing agent; and (c) at least one mediator, wherein the mediator is chosen from the group consisting of N-aryl-N-hydroxyamides.Type: GrantFiled: August 5, 1997Date of Patent: July 10, 2001Assignee: Consortium für elektrochemische Industrie GmbHInventors: Jürgen Stohrer, Hans-Peter Call, Johannes Freudenreich, Manfred Amann, Robert Müller
-
Patent number: 6254722Abstract: A method for making dissolving pulp from cellulosic fiber. The fiber is treated with a 3-stage sequence having a first alkali extraction stage, a xylanase treatment stage, and a second alkali extraction stage. Having the xylanase treatment stage sandwiched between 2 alkali extraction stages results in the dissolving pulp exhibiting both a very low xylan content of about 2.6% by weight or less and a very low mannan content of about 1.5% by weight or less. The low contents of these 2 components cannot be achieved with comparison treatments of only an alkali extraction stage, only a xylanase treatment stage, or only 2 stages of a xylanase treatment stage and an alkali extraction stage.Type: GrantFiled: September 2, 1998Date of Patent: July 3, 2001Assignee: North Carolina State UniversityInventors: Larry S. Jackson, Thomas W. Joyce, John A. Heitmann, Jr.
-
Patent number: 6242245Abstract: A multicomponent system for modifying, degrading or bleaching lignin and lignin-containing materials or similar substances, includes an oxidoreductase and an oxidant suitable for the oxidoreductase and a mediator and at least one enzymatically active additive. The mediator does not inactivate the oxidoreductase and the enzymatically active additive, and the enzymatically active additive is selected from the group consisting of the hydrolases of the enzyme class 3.2.1.Type: GrantFiled: September 25, 1998Date of Patent: June 5, 2001Assignee: Consortium für elektrochemische Industrie GmbHInventors: Manfred Amann, Michael Wohlschlager, Johannes Freudenreich, Jürgen Stohrer, Elke Fritz-Langhals
-
Patent number: 6228629Abstract: DNA encoding novel xylanases, vectors containing such DNA, hosts transformed with such DNA, enzyme preparations, and the use of such preparations are described.Type: GrantFiled: December 17, 1996Date of Patent: May 8, 2001Assignee: Röhn Enzyme Finland OYInventors: Marja Paloheimo, Satu Hakola, Arja Mäntylä, Jari Vehmaanperä, Raija Lantto, Tarja Lahtinen, Richard B. Fagerström, Pirkko Suominen
-
Patent number: 6218164Abstract: The present invention provides thermophilic alkaliphilic bacteria designated Thermopallium natronophilum and thermophilic alkaliphilic polypeptides obtainable therefrom. It also provides compositions, particularly detergent compositions comprising the polypeptides.Type: GrantFiled: June 2, 1998Date of Patent: April 17, 2001Assignee: Genencor International, Inc.Inventors: Brian E. Jones, Margareta A. Herweijer, Michael J. Danson, David W. Hough, Carl R. Thompson
-
Patent number: 6207009Abstract: A process for producing paper or paperboard from mechanical pulp, in which the pulp is treated with a phenol-oxidizing enzyme after mechanical refining of the pulp has been completed. The resulting paper exhibits an increased strength relative to paper produced from untreated pulp.Type: GrantFiled: June 13, 1997Date of Patent: March 27, 2001Assignee: Novo Nordisk Biochem North America, Inc.Inventors: Tomas Tage Hansen, Peder Holk Nielsen
-
Patent number: 6200797Abstract: The invention relates to specific bacterium and proteins with xylanase activity derived from the bacteria, in particular to xylanases which are free of any significant cellulase activity and which are active at high temperature and at neutral to alkaline pH. Xylanases having these characteristics are particularly useful in the bleaching of wood pulps, such as kraft pulps. The preferred bacterium designated B230 was isolated from white-rotted kerri wood in Western Australia; a sample of which has been deposited under the provision of the Budapest Treaty in the Australian Government Analytical Laboratories under the accession number N94/41262. This preferred bacterium is a gram positive, obligatively aerobic, rod-shaped with a centrally-located spore and has the taxomonic characteristics of Bacillus subtilis (by VITEK method).Type: GrantFiled: October 10, 1997Date of Patent: March 13, 2001Assignee: Biotech International LimitedInventors: Robert William Dunlop, Bin Wang, Diane Ball, Alexander Buhisan Roullo, Cedric John Falk
-
Patent number: 6187136Abstract: A process for production of a lignocellulosic material modified by conjugation thereto of a phenolic substance comprising a substituent which, in the conjugated form of the phenolic substance, is, or may become, negatively or positively charged, respectively, comprises: reacting a lignocellulosic fibre material and the phenolic substance with an oxidizing agent in the presence of an enzyme capable of catalyzing the oxidation of phenolic groups by the oxidizing agent; and reacting together the products of the reactions; with the proviso that the phenolic substance is not a phenolic polysaccharide. A strengthened lignocellulose-based product (e.g. a paper product) may be prepared by a procedure wherein a product produced in accordance with the latter process is treated with a strengthening agent having an ionic charge of sign opposite to that which is conferred on the modified lignocellulosic material by the charge-conferring substituent.Type: GrantFiled: July 17, 1998Date of Patent: February 13, 2001Assignee: Novo Nordisk A/SInventors: Lars Saaby Pedersen, Claus Felby, Niels Munk
-
Patent number: 6159720Abstract: A highly active cellulase suitable for use in a removal of nap of cellulose-containing fibers, a process for reducing cellulose-containing fibers and a process for decoloring denim-dyed cellulose-containing fibers, and its gene are provided. A novel cellulase NCE4 isolated from Humicola insolens is a highly active cellulase, and can be used for various treatments of cellulose-containing fibers.Type: GrantFiled: March 3, 1999Date of Patent: December 12, 2000Assignee: Meiji Seika Kaisha, Ltd.Inventors: Kouichirou Murashima, Tatsuki Moriya, Toru Hamaya, Jinichiro Koga, Naomi Sumida, Kaoru Aoyagi, Takeshi Murakami, Toshiaki Kono
-
Patent number: 6140095Abstract: The present invention discloses enzymes having xylanase considerable activity at a pH of 9.0 and a temperature of 70.degree. C. The enzymes are obtainable from deposited strains which are related to alkaliphilic Bacilli. The enzymes are suited for use in paper and pulp production processes.Type: GrantFiled: December 29, 1995Date of Patent: October 31, 2000Assignee: DSM N.V.Inventors: Diane P. Williams, Sara Iverson, Roberta Lee Farrell, Pieter Van Solingen, Wilhelmina Theresia Herbes, Wilhelmus Antonius H. Van Der Kleij, Rudolf Franciscus C. Van Beckhoven, Wilhelmus Johannes Quax, Margaretha Adriana Herwijer, Frits Goedegebuur, Brian Edward Jones
-
Patent number: 6103059Abstract: A process for modifying, breaking down or bleaching lignin, material containing lignin or like substances uses oxidation catalysts and suitable oxidizing agents wherein these catalysts are used in combination with aliphatic, cycloaliphatic, hetercyclic or aromatic compounds containing NO, NOH or (A).Type: GrantFiled: November 7, 1996Date of Patent: August 15, 2000Assignee: Lignozym GmbHInventor: Hans-Peter Call
-
Patent number: 6099688Abstract: An enzymatic process for treating coarse pulp with an enzyme having cellobiohydrolase activity to reduce the specific energy requirements of the pulp and improve the properties of the pulp. Cellobiohydrolase enzymes isolated from the species Trichoderma, Aspergillus, Phanerochaete, Penicillium, Streptomyces, Humicola or Bacillus can be used.Type: GrantFiled: February 15, 1996Date of Patent: August 8, 2000Assignee: Valtion teknillinen tutkimuskeskusInventors: Jaakko Pere, Matti Siika-aho, Liisa Viikari
-
Patent number: 6093282Abstract: The present invention relates to a method for recycling of old corrugated container (OCC) using flotation, followed by selective enzymatic treatment to fines portion and by selective refining to long fiber stream, and more particularly, to a method for recycling of OCC, wherein OCC is treated with floatation and enzymatic hydrolysis and those recycled stock is refined, thereby having the following effects:a) The drainage property of base paper of old corrugated container is improved; andb) The strength of the same is enhanced by the refining treatment of the fractionated long fiber only; andc) The cost for disintegration and enzymatic treatment is reduced; and(d) The imported corrugated board and unbleached kraft pulp can be substituted by the Korean old corrugated container (KOCC).Type: GrantFiled: June 25, 1999Date of Patent: July 25, 2000Assignee: Korea Research Institute of Chemical TechnologyInventors: Jeong Yong Ryu, Kyoung Rak Ji, Jong-Ho Shin, Say Kyoun Ow