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| Number | Title | Issue Date |
| 8007635 | Lignocellulosic materials and the products made therefrom 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 ... | 08/30/2011 |
| 7638016 | Method for treating kraft pulp with optical brighteners after chlorine bleaching to increase brightness The present invention relates to a method of increasing the brightness of pulp, pulp made from such methods and methods of using such pulp. ... | 12/29/2009 |
| 7501043 | Steam treatment of chips with the addition of an acid liquid 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 ... | 03/10/2009 |
| 7396434 | Catalytic reactor process for the production of commercial grade pulp, native lignin and unicellular protein 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 r... | 07/08/2008 |
| 7390378 | Method of curling fiber and absorbent sheet containing same 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... | 06/24/2008 |
| 7374637 | Method of bleaching cellulose pulp with a main conduit for wash liquor and filtrate The method is for bleaching cellulose pulp in a bleach line that has at least two bleaching steps. The filtrate distribution is led up through the bleaching line counter-currently to the flow of cellulose pulp established in the bleaching line. A single joint main c... | 05/20/2008 |
| 7351764 | Methods to enhance brightness of pulp and optimize use of bleaching chemicals Mechanical or Chemical pulp is treated with about 0.01 weight % to about 5 weight % of a Mixture. The Mixture is water; diethylenetriaminepentakis(methyl)phosphonic acid or its known salts; polyacrylic acid or its known salts; and optionally one or more inert compou... | 04/01/2008 |
| 7312332 | Chlorohydrin and cationic compounds having high affinity for pulp or paper Selected chlorohydrin and cationic compounds containing nitroxide or hydroxylamine moieties are effective in stabilizing pulp or paper, especially pulp or paper containing lignin, against yellowing and discoloration due to the adverse effects of light. These compoun... | 12/25/2007 |
| 7294228 | Biopulp for non-woody fiber plants and biopulping method thereof 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 pl... | 11/13/2007 |
| 7229525 | Methods to enhance pulp bleaching and delignification A method to enhance brightness in Chemical and Mechanical pulps comprising adding an organic sulfide chelant is described and claimed. A method to enhance delignification in a Chemical pulp comprising adding an organic sulfide chelant is also described and cl... | 06/12/2007 |
| 7226525 | Process for producing very low COD unbleached pulp A pulp product that has a low COD is comprised of an unbleached pulp that is soaked and washed in alkaline water for a sufficient time so that the COD after soaking and washing is less than or equal to 3.0 kg/1000 kg of dry pulp. The pulp is produced by repetitively... | 06/05/2007 |
| 7214292 | Addition of THP or THP+ salt to pulping liquors to destroy catalase and/or catalase producing bacteria Pulping liquors used in the bleaching of pulps by hydrogen peroxide, and containing catalase-producing bacteria and/or catalase enzyme are treated with tris (hydroxymethyl) phosphine or a tetrakis (hydroxymethyl) phosphonium salt to kill the bacteria and destroy the... | 05/08/2007 |
| 7182835 | Two-stage chlorine bleaching process with filtrate recirculation Methods for bleaching chemical pulp are disclosed including dewatering the pulp to a concentration of from 25 to 40%, bleaching in a first chlorine dioxide stage, followed by a second alkaline bleaching stage, followed by a third chlorine dioxide bleaching stage, de... | 02/27/2007 |
| 7077931 | Method and bleaching line with a main conduit for wash liquor The method is for bleaching cellulose pulp in a bleach line that has at least two bleaching steps. The filtrate distribution is led up through the bleaching line counter-currently to the flow of cellulose pulp established in the bleaching line. A single joint main c... | 07/18/2006 |
| 7066990 | Ink jet ink and recording material The present invention relates to an ink jet ink, an ink jet recording material or an ink jet system comprising at least one compound selected from the group consisting of a) the dialkyl hydroxylamine stabilizers, b) the nitrone stabilizers and c) the amine oxide sta... | 06/27/2006 |
| 7025814 | Ink-jet ink and recording material The present invention relates to an ink-jet ink, an ink-jet recording material or an ink-jet system containing at least one water-soluble hindered amine compounds of the general formula (I) or (II): wherein G1 and G2 are independently alkyl of ... | 04/11/2006 |
| 7018454 | Ink jet ink and recording material The present invention relates to an ink jet ink, an ink jet recording material or an ink jet system comprising at least one sterically hindered N-hydroxylamine strong acid salt, for example 1-hydroxy-2,2,6,6-tetramethyl-4-hydroxypiperidinium chloride or bis(1-hydrox... | 03/28/2006 |
| 7018510 | Process for bio-bleaching of Kraft pulp using bacterial consortia 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 mixtur... | 03/28/2006 |
| 6833187 | Unbleached pulp for lyocell products In accordance with the present invention, lyocell products can be made with unbleached pulps resulting in products with high amounts of hemicellulose and high amounts of lignin as compared to conventional lyocell products. The lyocell products of the present inventi... | 12/21/2004 |
| 6797113 | Use of thinnings and other low specific gravity wood for lyocell pulps method The use of low specific gravity wood from thinning operations, for example, will produce a lower brownstock viscosity for a given kappa number target. A differential of 200-cP falling ball pulp viscosity has been detected from Kraft cooks of low and high specific gr... | 09/28/2004 |
| 6790527 | Lyocell fiber from unbleached pulp In accordance with the present invention, lyocell products can be made with unbleached pulps resulting in products with high amounts of hemicellulose and high amounts of lignin as compared to conventional lyocell products. The lyocell products of the present inventi... | 09/14/2004 |
| 6733625 | Method and apparatus for treating pulp The present invention relates to a method of treating chemical pulp in order to optimize the consumption of bleaching chemicals and to improve the quality of the pulp. Especially the invention relates to a method according to which filtrate obtained from a suitable ... | 05/11/2004 |
| 6702921 | Methods to enhance pulp bleaching and delignification using an organic sulfide chelating agent A method to enhance brightness in Chemical and Mechanical bleached pulps comprising adding an organic sulfide chelant to the Chemical and Mechanical pulp.... | 03/09/2004 |
| 6685748 | Enzymatic bleaching of natural non-cotton cellulosic fibers A method is provided for bleaching a non-cotton cellulosic fiber, yarn or fabric by contacting said fiber, yarn or fabric with a hemicellulase enzyme for a time and under conditions suitable to produce a whitening of said fiber, yarn or fabric.... | 02/03/2004 |
| 6669863 | Anionic cellulose ethers having temperature-dependent associative properties An anionic cellulose ether obtainable by a process comprising reacting an alkali metal cellulose with one or more reagents A selected from the group consisting of haloacetic acids, alkali metal haloacetates, alkali metal vinyl sulfonates, vinyl sulfonic a... | 12/30/2003 |
| 6669904 | Stabilized bromine solutions, method of making and uses thereof for biofouling control Stabilized bromine solutions are prepared by combining a bromine source and a stabilizer to form a mixture, and then adding an oxidizer to the mixture.... | 12/30/2003 |
| 6599326 | Inhibition of pulp and paper yellowing using hydroxylamines and other coadditives Chemical pulps or papers, especially kraft pulps or papers, which may still contain traces of lignin, have enhanced resistance to yellowing when they contain an effective stabilizing amount of a N,N-dialkylhydroxylamine, an ester, amide or thio substitute... | 07/29/2003 |
| 6500303 | Inhibition of pulp and paper yellowing using nitroxides, hydroxylamines and other coadditives Pulps or papers, especially chemimechanical or thermomechanical pulps or papers, which still contain lignin, have enhanced resistance to yellowing when they contain an effective stabilizing amount of a hindered amine compound which preferably is a nitroxi... | 12/31/2002 |
| 6447644 | Inhibition of pulp and paper yellowing using nitroxides, hydroxylamines and other coadditives Pulps or papers, especially chemimechanical or thermomechanical pulps or papers, which still contain lignin, have enhanced resistance to yellowing when they contain an effective stabilizing amount of a hindered amine compound which preferably is a nitroxi... | 09/10/2002 |
| 6425973 | Treatment of solid containing material derived from effluent A method of treating solid containing material derived from effluent or sludge from a plant for de-inking paper, the material containing calcium in the form of one or more insoluble calcium compounds, the method including the steps of treating the materia... | 07/30/2002 |
| 6391154 | Paper web and a method for the production thereof The invention concerns a method for producing a paper web. According to the method a stock is produced from the fibrous raw material and the stock is formed to a web which is dried on a paper machine. According to the invention the stock is formed from a ... | 05/21/2002 |
| 6273995 | Paper bulking promoter, highly bulky pulp sheet, and process for producing the pulp sheet A paper bulking promoter containing a compound represented by the following formula (1) with which a highly bulky sheet can be obtained without impairing paper strength: RO(EO)m (PO)n H (1) wherein R represents a linear or branched alkyl... | 08/14/2001 |
| 6254724 | Inhibition of pulp and paper yellowing using nitroxides, hydroxylamines and other coadditives Pulps or papers, especially chemimechanical or thermomechanical pulps or papers, which still contain lignin, have enhanced resistance to yellowing when they contain an effective stabilizing amount of a hindered amine compound which preferably is a nitroxi... | 07/03/2001 |
| 6117545 | Surface-modified cellulose microfibrils, method for making the same, and use thereof as a filler in composite materials Cellulose microfibrils, in particular for use as a reinforcing filler or structuring agent in composite materials, a method for making same, and composite materials containing said microfibrils, are disclosed. Specifically, said microfibrils are surface-m... | 09/12/2000 |
| 6086714 | Process for adjusting the alkalinity of pulp slurry in a broke pulper using carbon dioxide A method for adjusting the alkalinity of a pulp slurry in a broke pulper, and more particularly, to adjusting the pH of the pulp slurry using carbon dioxide.... | 07/11/2000 |
| 6059844 | Cleaning process A process is disclosed for bleaching of a substrate which includes adding a molecular oxygen activating system to an aqueous wash liquor and bleaching the substrate with the molecular oxygen activating system in the aqueous wash liquor. Significant substr... | 05/09/2000 |
| 6017870 | Purified cellulase and method of producing A purified novel cellulase composition is provided which may be isolated from a fermentation culture of Trichoderma longibrachiatum and has a molecular weight of about 95-105 kD as approximated on SDS-PAGE (see FIG. 1), a pl of about 5.6-6.8 as estimated ... | 01/25/2000 |
| 6004428 | Process for fiber recovery from bonded fiber webs A process for dissolving a binder off a fiber web bonded therewith includes treating the fiber web, which is bonded with a polymeric binder having carboxylate groups crosslinked via alkaline earth metal cations, with an aqueous solution of an alkali metal... | 12/21/1999 |
| 5922579 | Xylanases and uses thereof Enzyme compositions containing thermostabile xylanases of Chaetomium thermophilum, purified enzyme preparations of such xylanases, and the use of such compositions and preparations in the bleaching of plant pulp and in feed and baking applications are des... | 07/13/1999 |
| 5770010 | Pulping process employing nascent oxygen This invention relates to an environmentally preferred process for the delignification of a cellulosic biomass comprising pulp. The process uses the oxidative properties of nascent oxygen to complete pulping and bleaching operations. The process may be us... | 06/23/1998 |
