| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 162072000 | Organic | 61 |
| 20080210393 | Mediator-Enzyme System for Controlling Pitch Deposits in Pulp and Paper Production - The invention relates to the use of mediator-enzyme system, which is characterised in that the enzyme comprises a laccase-type enzyme and the mediator comprises a chemical compound which acts as a redox intermediate in the enzymatic oxidation, for the elimination of lipophilic compounds (including, among others, sterols that are free and conjugated in the form of esters and glycosides, triglycerides, fatty alcohols and resin acids) which cause deposits in the product, the machinery and the circuits during the production of pulp and paper (both from hardwood and softwood and non-woody plants). The treatment eliminates up to 100% of the aforementioned lipophilic compounds, depending on the material treated, and, in this way, improves the quality of the pulp obtained, the operation of the industrial installations and the characteristics of the end product. | 09-04-2008 |
| 20080289783 | METHOD OF DEGUMMING CELLULOSIC FIBRES - A process for producing dissolving pulp includes a degumming step using a degumming liquor which includes hydrogen peroxide and ammonia. | 11-27-2008 |
| 20100018658 | Laccases for Bio-Bleaching - Provided herein are isolated laccase enzymes and nucleic acids encoding them. Also provided are mediators for laccase reactions. Also provided herein are methods for using laccases to oxidize lignins and other phenolic and aromatic compounds, such as for bio-bleaching and decolorization of wood pulp under high temperature and pH conditions to facilitate a substantial reduction in use of bleaching chemicals, as well as for treatment of fibers. | 01-28-2010 |
| 20100051216 | PROCESS FOR THE CONTROL OF PITCH - The present invention relates to a process for the control of pitch in an aqueous medium by adding surface-reacted natural calcium carbonate or an aqueous suspension comprising surface-reacted calcium carbonate and having a pH greater than 6.0 measured at 20° C., to the medium, wherein the surface-reacted calcium carbonate is a reaction product of natural calcium carbonate with carbon dioxide and one or more acids, the use of the surface-reacted natural calcium carbonate for pitch control, as well as to a combination of a surface-reacted natural calcium carbonate and talc for pitch control, and the resulting composites. | 03-04-2010 |
| 20100101743 | Process for the bleaching of paper pulp - Process for the bleaching of paper pulp in which : | 04-29-2010 |
| 20100307703 | METHOD OF DEGUMMING JUTE FIBRES WITH COMPLEX ENZYME (3) ( amended - A method of degumming jute fibres with complex enzyme, wherein said complex enzyme comprises pectinase and laccase, comprises the steps of: a. soaking the jute fibres in the water solution of said complex enzyme made from pectinase and laccase and adjusting the weight proportion of said complex enzyme water solution and said jute fibres; b. adjusting the PH value of said complex enzyme water solution, and adjusting the temperature of said complex enzyme water solution to a first temperature, then keeping said complex enzyme water solution with the first temperature for a certain period of time; c. adjusting the PH value of said complex enzyme water solution, and adjusting the temperature of said complex enzyme water solution to a second temperature; then, keeping said complex enzyme water solution with the second temperature for another period of time; d. conducting enzyme deactivation of the jute fibres processed with said complex enzyme. | 12-09-2010 |
| 20100314057 | FLOUR-BASED PRODUCT, ITS PREPARATION AND USE - The invention pertains to a process for manufacturing paper or cardboard, wherein flour including a protein and starch fraction is subjected to a degradation step involving a treatment with protease and a non-starch polysaccharide (NSP) hydrolysing enzyme, after which the flour is introduced into the paper fibre matrix. It is especially preferred that the flour is rye flour, and that the NSP hydrolysing enzyme is a hemi-cellulase or a cellulase, or a combination thereof. The invention also pertains to a composition containing flour and the aforementioned enzymes; and to the use of flour thus treated as a source of starch. | 12-16-2010 |
| 20110042021 | Wood Composition Containing Olefins, Use of Olefins for Rendering Raw Wood Materials Water Repellent, and Method for the Production of Wood Materials - The invention relates to a wood composition containing olefin and raw wood materials, the use of said olefins for rendering raw wood materials water repellent, and a method for producing wood materials therefrom. The raw wood materials contain or are made of lignocellulose and are provided in the form of fibers, strands, or chips. | 02-24-2011 |
| 20120211185 | COMPOSITIONS AND PROCESSES FOR PAPER - 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. | 08-23-2012 |
| 20120273145 | ORGANOPOLYSILICONE POLYETHER DRAINAGE AID - The present invention relates to a drainage aid composition and its use in pulp washing process. More particulary, this invention relates to drainage aid composition of silicone polyethers prepared via zinc catalized dehydrogenative coupling of alcohol terminated polyethers with silicone oligomers and polymers comprising of at least one silicon bonded hydrogen. The compostion of this invention exhibit excellent drainage properties. | 11-01-2012 |
| 20130098570 | BLEACHING OF PULP - The use of a peroxidase and violuric acid, or a derivative thereof in the bleaching of pulp, such as paper materials, such as paper, linerboard, corrugated paperboard, tissue, towels, corrugated containers and boxes. The peroxidases of the invention are classified as EC 1.11.1.7. The effect of peroxidase is bleaching and de-inking of the pulp, e.g. the paper pulp and the resulting paper material. | 04-25-2013 |
| 20130105099 | FLUORESCENT DYES FOR PAPER DYEING | 05-02-2013 |
| 20130126110 | LACCASES FOR BIO-BLEACHING - Provided herein are isolated laccase enzymes and nucleic acids encoding them. Also provided are mediators for laccase reactions. Also provided herein are methods for using laccases to oxidize lignins and other phenolic and aromatic compounds, such as for bio-bleaching and decolorization of wood pulp under high temperature and pH conditions to facilitate a substantial reduction in use of bleaching chemicals, as well as for treatment of fibers. | 05-23-2013 |
| 20130146239 | ENZYMATIC PRE-TREATMENT OF MARKET PULP TO IMPROVE FIBER DRAINAGE AND PHYSICAL PROPERTIES - Methods for reducing the effects of wetlapping, drying, and hornification of pulp fibers and consequently increasing the pulp drainage and strength properties in the final product (i.e., paper) are provided. The method which has been developed creates a “value-added” product by the wastepaper supplier or at the pulp and/or deinking (recycled paper) mill—a wastepaper load/bale, wet pulp stock or wet lap, or dried pulp treated with or impregnated with enzymes that enhance the quality of the pulp or paper product when it is repulped and processed at the paper mill. | 06-13-2013 |
| 20140174680 | PULPING PROCESSES - A pulping process comprises using a high concentration of anthraquinone (AQ). The pulping process is capable of providing a pulp having low Kappa number with unexpectedly high strength. The pulping process can use wood or non-wood fibers (e.g., bagasse and corn stover) to provide pulp having good papermaking quality. The method for pulping a fiber comprising cooking a first mixture comprising the fibers, water, an alkali, and a delignification selectivity enhancing chemical for a cooking time and at a cooking condition sufficient to form a first pulp having a desired Kappa number of about 15 or less, and strength parameters that are sufficient for papermaking, where the starting material prior to cooking has a Kappa number of 60 or greater. | 06-26-2014 |
| 20140182797 | METHOD FOR PRODUCING MODIFIED CELLULOSE - The present invention provides a method for producing modified nanofibrillated cellulose characterized by bringing cellulosic material into a fiber suspension, adsorbing a cellulose derivative or polysaccharide or polysaccharide derivative onto fibers in said fiber suspension under special conditions and subjecting the obtained fiber suspension derivative to mechanical disintegration. A modified nanofibrillated cellulose obtainable by a method of the present invention is provided. Furthermore, the invention relates to the use of said modified nanofibrillated cellulose. | 07-03-2014 |
| 20140209260 | ENZYMATIC TREATMENT OF WOOD CHIPS - A process using a multicomponent enzyme preparation to treat chips that have been crushed using a device that combines shear and compressive forces where treatment occurs mainly during decompression and reduces the specific energy consumption and/or increasing production of subsequent refining while maintaining or increasing handsheet physical properties. The enzyme preparation is to have a major endoglucanase activity, a significant mannanase activity and a slight cellobiohydrolase activity. This enzyme mixture is prepared from a genetically modified strain of | 07-31-2014 |
| 20140238626 | METHOD FOR PRODUCING CELLULOSE NANOFIBERS - Provided is a method which is capable of producing a cellulose nanofiber dispersion liquid that has a low viscosity and excellent fluidity even at a high concentration, while exhibiting excellent transparency. In a method for producing cellulose nanofibers, wherein a cellulosic starting material is oxidized in water using an oxidant in the presence of an N-oxyl compound and a compound that is selected from the group consisting of a bromide, an iodide and a mixture thereof and the thus obtained oxidized cellulose is defibrated and dispersed, pulp which is obtained by carrying out kraft cooking after a hydrolysis process is used as the cellulosic starting material. | 08-28-2014 |
| 20150090413 | WOOD PULP FOR GLASS PLATE-INTERLEAVING PAPER AND GLASS PLATE-INTERLEAVING PAPER - The present invention relates to wood pulp for glass plate-interleaving paper in which an amount of silicone contained in the wood pulp is 0.5 ppm or less with respect to an absolute dry mass of the pulp, as well as relates to interleaving paper for glass plates of which a raw material is the wood pulp, in which an amount of silicone contained in paper is 0.5 ppm or less with respect to the absolute dry matter of paper. The interleaving paper for glass plates formed from the wood pulp of the present invention, as well as interleaving paper for glass plates of the present invention are able to remarkably control contamination of silicone to the surface of glass plates for use as substrate material for flat panel displays for which a high degree of cleanliness and high quality are required. | 04-02-2015 |
| 20150129143 | PULPING PROCESSES - A pulping process comprises using a high concentration of anthraquinone (AQ). The pulping process is capable of providing a pulp having low Kappa number with unexpectedly high strength. The pulping process can use wood or non-wood fibers (e.g., bagasse and corn stover) to provide pulp having good papermaking quality. The method for pulping a fiber comprising cooking a first mixture comprising the fibers, water, an alkali, and a delignification selectivity enhancing chemical for a cooking time and at a cooking condition sufficient to form a first pulp having a desired Kappa number of about 15 or less, and strength parameters that are sufficient for papermaking, where the starting material prior to cooking has a Kappa number of 60 or greater. | 05-14-2015 |
| 20150315750 | Methods of Making Paper and Paper with Modified Cellulose Pulps - The present invention relates to an improved process for producing chemical cellulose pulp wherein biopolymers are added immediately before, during or after a bleaching step, depending on pulp characteristics and on process conditions used. The biopolymers according to the present invention are starches chemically modified by an etherification reaction. This treatment results in a differentiated pulp having improved physical, chemical and mechanical properties when compared with cellulose pulps obtained by traditional processes. The use of said biopolymer alters the relations between important pulp properties rendering their application in papermaking process advantageous. This differentiation increases the possibilities of use and also of new applications, including for the substitution of pulps produced from other cellulose sources. Thus, the present invention also relates to methods of making paper, such as printing, writing, decorative, special or tissue-type papers, through the use of the cellulose pulps modified by the above process. | 11-05-2015 |
| 20160083908 | A PAPER COMPOSITION AND PROCESS FOR MAKING THE SAME - A new paper composition comprising, a) from 15 wt. % to 70 wt. % a hiding composite comprising based on the total weight of the hiding composite, from 30 wt. % to 75 wt. % pigment particles and from 25 wt. % to 70 wt. % a thermoplastic polymer. The pigment particles are hydrophobically treated with the surface tension of the pigment particles being from 0.1 to 50 mN/m, and the surface tension difference between the pigment particles and the thermoplastic polymer being less than 40 mN/m; and b) from 30 wt. % to 85 wt. % a paper pulp. Process of making such a new paper composition. | 03-24-2016 |
| 162073000 | With inorganic chlorine containing material | 1 |
| 20150308049 | Chlorine dioxide treatment compositions and processes - The present invention relates to methods and compositions for chlorine dioxide delignification and/or bleaching processes by reacting pulp with chlorine dioxide and a peroxidase and/or a laccase. | 10-29-2015 |
| 162074000 | Chlorine containing | 5 |
| 20100170646 | METHOD OF INCREASING ENZYME STABILITY AND ACTIVITY FOR PULP AND PAPER PRODUCTION - Wood pulp is treated with an esterase formulation in combination with a metal ion or cationic polymer to increase the stability or activity or both of esterase enzymes at high temperature, or at extreme pH ranges of acidic and alkaline conditions. The treatment by esterase together with metals ion or cationic polymer can be used to treat pitch containing pulp at high temperatures prior to, during or after refining of wood chip/pulp, in order to enhance the reduction of pitch problems and facilitate in the manufacture of paper. | 07-08-2010 |
| 20110240239 | Methods to Reduce Metals Content of Bleached Pulp While Reducing Bleaching Cost in a Chemical Pulping Process - In accordance with certain embodiments of the present disclosure, a method of decreasing the amount of oxidizer required by a pulping or papermaking process is provided. The method comprises adding to a process stream or solution of the pulping or papermaking process an effective amount of urea hydrochloride to reduce the amount of oxidizer required by the pulping or papermaking process. | 10-06-2011 |
| 20120255692 | Bleach compositions and related methods - The invention relates to bleach compositions comprising organic acyl polyoxychlorine and methods for producing said bleach compositions. The bleach compositions form reactive oxygen species when contacted by chromophores. | 10-11-2012 |
| 20130139980 | Method And System For Producing Market Pulp And Products Thereof - Methods and systems are provided for producing market pulp which include treatment of pulp with diverse ionic compounds before pulp drying. Cationically and anionically charged compounds can be used to treat pulp before pulp drying to improve pulp dewatering performance and efficiency in the production of market pulp. Market pulp products containing the treatment compounds are also described. | 06-06-2013 |
| 20150376836 | ESTERIFIED CELLULOSE PULP COMPOSITIONS AND RELATED METHODS - Esterified cellulose pulp compositions produced in high yield from commercially available wood pulp sources, methods for making the esterified cellulose pulp compositions, and articles prepared from the esterified cellulose pulp compositions. | 12-31-2015 |
| 162075000 | Fat, fatty oil or higher fatty acid | 2 |
| 20100038043 | Pulping Additives for a Reduction of Resin from Kraft Pulp - Compositions and methods for the removal of resin from wood chips processed in a Kraft pulping process are disclosed. The method is particularly useful for removing triterpene and triterpenoid resin. | 02-18-2010 |
| 20100212847 | ANTI-FOAMING AGENT FOR THE PAPER INDUSTRY - Antifoams for the paper industry, based on oil-in-water emulsions in which the oil phase comprises | 08-26-2010 |
| 162076000 | Acids, salts or esters | 26 |
| 20080264588 | Method of Making Medium Density Fiberboard - The present invention provides a method for producing an MDF board from pulp from a fibrous lignocellulose material using a treatment or pretreatment step which exposes the material to oxalic acid or oxalic acid derivatives (particularly dialkyl ester derivatives, particularly in the vapor phase). The treated wood is then subjected to a sugar extraction wash and refined using any one of the several pulping methods to produce a final pulp product. Once this is done the pulp is used to make MDF boards having improved water repellency properties. | 10-30-2008 |
| 20090008049 | NON-SCALING CHIP CONDITIONING SYSTEM FOR ENERGY REDUCTION IN MECHANICAL PULPING - A method for pulping a fibrous lignocellulosic material includes a pretreatment step wherein the lignocellulosic material is reacted with a chelating agent selected from the group consisting of amino acids, monocarboxylic acids and polycarboxylic acids preferably having from two to six carbon atoms. The chelating agent reacts with calcium ions in the material to form stable, water-soluble calcium complexes so as to avoid scaling, and the treated material requires a significantly lower energy input to undergo refining using either a mechanical or thermomechanical pulping method. | 01-08-2009 |
| 20090151881 | High absorbency lyocell fibers and method for producing same - High absorbency lyocell fibers are obtainable by hydrothermal treatment. The fibers can be treated with water at temperatures of at least 60° C. to provide lyocell fibers that can be formed into a random fibrous plug having a mass of 2 g, a density of 0.4 g/cm | 06-18-2009 |
| 20090165969 | Enzymatic treatment of pulp for lyocell manufacture - 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. | 07-02-2009 |
| 20100006246 | PROCESS FOR INCREASING BULK OF A FIBER PRODUCT, FIBER PRODUCT AND USE THEREOF - 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. | 01-14-2010 |
| 20100108275 | POLYMER COMPOSITION FOR PEROXIDE BLEACHING OF CELLULOSIC FIBRE MATERIAL AND PROCESSES FOR PEROXIDE BLEACHING - The present invention relates to a polymer composition for peroxide bleaching of a cellulosic fibre material, said composition being in the form of a stable aqueous polymer solution obtained by bringing in an aqueous medium a first polymer (A) comprising a partly or totally acidic homopolymer of acrylic acid, methacrylic acid or maleic acid, or a copolymer of acrylic acid and/or methacrylic acid with an unsaturated dicarboxylic acid, into contact with a second polymer (B) comprising a polylactone of a poly-alfa-hydroxyacrylic acid in solid form or as a moist powder or as a slurry, said polymer solution having a pH of at most 5. The invention also relates to peroxide bleaching processes. | 05-06-2010 |
| 20100163193 | Process for the bleaching of mechanical paper pulp - A process for the bleaching of mechanical paper pulp with one or more peroxide oxidizing agents, in which the pulp is pretreated in a pretreatment step with one or more chelating agents chosen from aspartic acid and its derivatives, substituted on the nitrogen atom, characterized in that the initial pH of the pretreatment step, just before adding the one or more chelating agents, is above 8. | 07-01-2010 |
| 20100236734 | PROCESS FOR BLEACHING PULP - A process for the bleaching of wood pulp using one or more peroxide oxidising agents wherein the process includes treatment of the pulp with a mixture of chelating agents comprising: (a) a first chelating agent selected from the group consisting of: ethylenediamine N,N-disuccinic acid, methylglycinediacetic acid, glutamic acid N,N-diacetic acid, imino disuccinic acid and anions and mixtures thereof; and (b) a second chelating agent selected from the group consisting of: diethylene triamine pentaacetic acid, ethylenediamine tetraacetic acid, diethylenetriamine penta methylene phosphonic acid and anions and mixtures thereof. | 09-23-2010 |
| 20100282422 | PROCESSES FOR PRODUCING CELLULOSE NANOFIBERS, CELLULOSE OXIDATION CATALYSTS AND METHODS FOR OXIDIZING CELLULOSE - The present invention aims to provide a process for producing cellulose nanofibers using a 4-hydroxy TEMPO derivative less expensive than TEMPO and a process capable of rapidly producing homogeneous cellulose nanofibers. Wood cellulose can be efficiently converted into nanofibers by a process for producing cellulose nanofibers comprising treating a cellulosic material with an oxidizing agent in water in the presence of a cellulose oxidation catalyst comprising an N-oxyl compound represented by formula 1 below: | 11-11-2010 |
| 20110000632 | Process to Make a Clay Comprising Charge-Balancing Organic Ions, Clays Thus Obtained, and Nanocomposite Materials Comprising the Same - The invention relates to a layered double hydroxide comprising a charge-balancing organic anion, wherein the charge-balancing anion is a monovalent anion comprising at least one hydroxyl group, and which comprises less than 20 wt % boehmite. Claimed are also an aqueous slurry, a water borne coating, a composite material and a master batch comprising the said layered double hydroxide as well as the use of the said layered double hydroxide in paper making processes and as stain blocking agent in water borne coating applications. | 01-06-2011 |
| 20110067831 | Process for the bleaching of paper pulp - Process for the bleaching of paper pulp in which an aqueous suspension of paper pulp is subjected to a bleaching treatment with hydrogen peroxide in the presence of magnesium hydroxide and of at least one poly-α-hydroxyacrylic acid, its salt or their mixture. | 03-24-2011 |
| 20110284175 | INCREASING ALKALINE PULPING YIELD FOR SOFTWOOD WITH METAL IONS - Impregnating or spraying softwood chips in a solution containing an appropriate concentration of alkaline earth metal ions selected from the group consisting of calcium ions, barium ions and strontium, preferably calcium ions, at room temperature before a reductive alkaline pulping process, for example kraft pulping, significantly increases pulp yield. Using an agent that complexes with the metal ions, such as hydroxyethylidene diphosphonic acid (HEDP) allows this benefit of metal ions to be achieved during the pulping process rather than in a separate impregnation step. | 11-24-2011 |
| 20120061043 | Process for the bleaching of mechanical paper pulp - The invention relates to a process for the bleaching of paper pulp with one or more peroxide oxidizing agents, in which the pulp is first treated in a pretreatment step with at least one inorganic magnesium derivative combined with at least one carboxylic acid or its salt, except its magnesium salt, or with at least one carboxylic acid at least partially saponified with Mg | 03-15-2012 |
| 20120186762 | PRODUCING HALF-STUFFS FOR THE MANUFACTURE OF PAPERY ARTICLES - The present invention relates to a process for producing half-stuffs for the manufacture of papery articles which comprises adding methanesulfonic acid to an aqueous fibrous suspension to set the pH. | 07-26-2012 |
| 20130000855 | METHOD FOR MANUFACTURING NANOFIBRILLATED CELLULOSE PULP AND USE OF THE PULP IN PAPER MANUFACTURING OR IN NANOFIBRILLATED CELLULOSE COMPOSITES - A method for manufacturing pulp. The manufactured pulp includes at least 30 w-% nanofibrillated cellulose material measured from the dried pulp. A raw material is introduced to a system. The raw material includes cellulose. At least one type of an optical brightening agent is dosed as a refining additive to the system. The raw material is refined in the presence of the dosed optical brightening agent in at least one pre-refining stage or fibrillation stage to form fibrillar cellulose material. | 01-03-2013 |
| 20130042986 | METHOD FOR PULP BLEACHING - A process for pulp bleaching is disclosed wherein an amino acid phosphonic acid is used together with a bleaching agent, pH regulants and pH buffers for pulp treatment in an aqueous medium. The bleaching agent can be represented by oxidative and reductive bleaching agents. The oxidative bleach treatment is conducted in alkaline medium whereas the reductive treatment is conducted in mildly acid medium. | 02-21-2013 |
| 20130126111 | FREENESS OF PAPER PRODUCTS - The present invention provides for the optimisation of conditions for treating pulp with a catalyst and hydrogen peroxide to produce a Freeness value (SR) in a web produced from the treated pulp such that the energy required in mechanical agitation of the pulp is reduced. | 05-23-2013 |
| 20130139981 | CROSS-LINKED GLYCEROL BASED POLYMERS AS DIGESTION AIDS FOR IMPROVING WOOD PULPING PROCESSES - The invention provides a method of improving the digestion of wood chips into pulp. The method involves: adding a cross-linked glycerol-based polymer additive to a solution used in the digestion process. This additive is unexpectedly effective at facilitating digestion. The branched and ether structure of the additive allows it to withstand the harsh nature of a high stress environment. In addition, it is more soluble in the harsh condition than other surfactants. The structure, resistance, and particular balance between hydrophobic and hydrophilic regions, causes the additive to increases the interaction between the wood chips and the digestion chemicals. This in turn reduces the costs, the amount of additive needed, and the amount of reject wood chunks that result from the digestion process. | 06-06-2013 |
| 20130153163 | METHOD OF DISSOLVING LIGNOCELLULOSIC MATERIALS - The invention describes solutions containing cellulose and a method of dissolving lignocellulosic materials. In the method, the lignocellulosic material is contacted with a conjugate acid, formed by a strong organic base and a weaker acid, under conditions which are conducive to at least a partial dissolution of the cellulosic components of the lignocellulosic material. It has been found that it is possible to recover at least a portion of the dissolved part of the lignocellulosic material by at least partial dissociation of the conjugate acid. Furthermore it is possible to recover at least a portion of the dissociated organic base and the acid, to form a conjugate acid of the recovered base and acid, and to recycle it for use in the first steps of the method. | 06-20-2013 |
| 20130248128 | PROCESS FOR DECOMPOSING LIGNIN IN BIOMASS - A mild inexpensive process for treating lignocellulosic biomass involves oxidative delignification of wood using an aqueous solution prepared by dissolving a catalytic amount of manganese (III) acetate into water and adding hydrogen peroxide. Within 4 days and without agitation, the solution was used to convert poplar wood sections into a fine powder-like delignified, cellulose rich materials that included individual wood cells. | 09-26-2013 |
| 20140000824 | FREENESS OF PAPER PRODUCTS | 01-02-2014 |
| 20140102649 | METHOD FOR PRODUCING PAPER, PAPERBOARD AND CARDBOARD HAVING HIGH DRY STRENGTH - Process for the production of paper, board and cardboard having high dry strength by addition of an aqueous composition comprising a nanocellulose and at least one polymer selected from the group consisting of the anionic polymers and water-soluble cationic polymers, draining of the paper stock and drying of the paper products. | 04-17-2014 |
| 20140202646 | Bleach Stabilizer Compositions And Methods - Compositions for and methods of stabilizing bleaching and making paper or paperboard having suitable brightness are provided. A stabilizer composition is provided containing aminocarboxylate, hydroxy acid, and either polyamino acid or iminodisuccinate, or both. The stabilizer composition can have low levels or be free of magnesium, phosphates, and silicates. The present invention also relates to a method of stabilizing the bleaching of pulp at an alkaline pH. | 07-24-2014 |
| 20140311693 | WOOD FIBRE ACETYLATION - Disclosed is a modified refiner system for the acetylation of wood chip and/or wood fibre. The invention comprises a process for the acetylation of wood chip in a refiner system including a feed hopper component, a non-steam digester component and a refiner (defibrator) component in which the chip is contacted with an acetylating fluid between the hopper and the digester components within a connecting multi-zone compression feed screw. | 10-23-2014 |
| 20150107790 | METHOD OF SEPARATION OF HEMICELLULOSE AND CELLULOSE FROM POLYSACCHARIDE SOURCES - A method of separating hemicellulose and cellulose by dissolution of hemicellulose from a hemicellulose-rich source, such as a pulp of any origin or from holocellulose. In the method, hemicellulose is dissolved in a solvent system comprising a cellulose solvent, which is either a ionic liquid or another direct cellulose solvent, and a molecular solvent (co-solvent), wherein said co-solvent does not dissolve cellulose, and wherein the solvent basicity and acidity of said ionic liquid or other direct cellulose solvent are adequately adjusted by the co-solvent. The present invention enables quantitative separation of cellulose and hemicellulose without any depolymerization and yield losses as occurring during conventional dissolving pulp manufacturing processes. | 04-23-2015 |
| 20160168791 | PRODUCT AND PROCESSES FROM AN INTEGRATED FOREST BIOREFINERY | 06-16-2016 |
| 162077000 | Alcohols or phenols | 5 |
| 20090014138 | Production of Pulp Using a Gaseous Organic Agent as Heating and Reaction-Accelerating Media - The invention relates to an improved process to break down lignin macromolecules and liberating cellulose fibers in lignocellulosic material using delignifying reactants with a gaseous organic agent as a heating and reaction-accelerating media. Lignocellulosic material is first impregnated with reactant chemicals, e.g. commonly used agents such as sodium hydroxide and sodium sulfide. Subsequently, the energy required for the delignification reactions is provided through heating with a gaseous organic agent such as methanol or ethanol, condensing and releasing energy to the solid lignocellulosic material. The temperature during the heating step with a gaseous organic agent is higher than the temperature during the impregnation step. | 01-15-2009 |
| 20090199985 | Cationized PVA as a Sizing Component in Wet Chop Processing - The catonized sizes poly vinyl alcohol and hydroxy celluloses are used in the manufacture of wet chop to improve product quality, cut cost and reduce the expenses incurred disposing of whitewater. | 08-13-2009 |
| 20100269993 | METHOD AND COMPOSITION FOR IMPROVING FIBER QUALITY AND PROCESS EFFICIENCY IN MECHANICAL PULPING - This invention provides a composition and method for improving a mechanical pulping process by decreasing freeness and amount of shives, providing energy and chemical savings, and enhancing brightness and mechanical strength of a paper product made from a pulp material in the process. The composition includes formulations, such as surfactants, chelants, hydrotropes, reductive and oxidative pulp modifiers, and pH-controlling chemicals. The method includes selectively introducing these formulations to the pulp material in the mechanical pulping process. | 10-28-2010 |
| 20110220307 | LIPOHYDROPHILIC GLYCEROL BASED POLYMERS AS DIGESTION AIDS FOR IMPROVING WOOD PULPING PROCESSES - The invention provides a method of improving the digestion of wood chips into pulp. The method involves: adding a liphohydrophilic glycerol-based polymer additive to a solution used in the digestion process. This additive is unexpectedly effective at facilitating digestion. The branched and ether structure of the additive allows it to withstand the harsh nature of a highly alkaline environment. In addition, it is more soluble in high pH than other surfactants. The structure, resistance, and particular balance between hydrophobic and hydrophilic regions, causes the additive to increases the interaction between the wood chips and the digestion chemicals. This in turn reduces the costs, the amount of additive needed, and the amount of reject wood chunks that result from the digestion process. | 09-15-2011 |
| 20140069599 | Method And Composition For Enzymatic Treatment Of Fiber For Papermaking, And Paper Products Made Therewith - A method is provided for controlling organic contaminants, such as xylans, pitch or both, that interfere with bleaching of fibers and/or cause other interference(s) in papermaking systems. The method includes contacting fibers before any bleaching thereof with a composition which contains a hemicellulolytic enzyme and an organic contaminant removal adjuvant to liberate the organic contaminants from the fibers. The treated fibers can then be bleached and further used, for example, in making paper. The present invention also relates to the treatment compositions and to paper products made with fiber materials treated with these compositions. A method of enhancing enzymatic degradation of a substrate as well as formulations and systems for achieving the same are also provided. Various substrates can be degraded or otherwise processed, including biomass, paper mill sludge, and animal hides. Enzymatic degradation can be enhanced by including one or more polymeric surfactants. | 03-13-2014 |
