Alcohols Or Phenols Patents (Class 162/77)
  • Patent number: 9000245
    Abstract: A process is disclosed for converting biomass to fuels and/or valuable chemicals. The process comprises the steps of a) activating biomass to make it more susceptible to conversion; c) partially converting the biomass to a solubilized material; and d) subjecting the unconverted biomass to a second conversion step. The process optionally comprises a step b) of adding a solvent to the activated biomass. In a preferred embodiment the solubilized biomass obtained in step c) is removed before the unconverted biomass is subjected to step d).
    Type: Grant
    Filed: August 1, 2011
    Date of Patent: April 7, 2015
    Assignee: KiOR, Inc.
    Inventors: Paul O'Connor, Dennis Stamires, Sjoerd Daamen
  • Publication number: 20150087030
    Abstract: A pretreatment composition and pretreatment process utilizing the composition is described. The pretreatment composition includes an aqueous organic solvent in combination with an alkaline component and an oxidizing agent. The pretreatment composition is useful for treating biomass as may be utilized in forming biofuel, paper, or other useful products. The biomass to be treated can include cellulosic biomass, lignocellulosic biomass, or a combination thereof.
    Type: Application
    Filed: April 1, 2013
    Publication date: March 26, 2015
    Inventors: Arpan Jain, Terry H. Walker
  • Patent number: 8864941
    Abstract: A method for the production water insoluble reactive lignin having low sulfur content and lignosulfonates from lignocellulosic material in a batch or continuous process. Lignocellulosic material is fractionated to produce water insoluble native lignin and lignosulfonates in various ratios, while preserving the cellulose and hydrolyzed hemicelluloses using water, ethanol and sulfur dioxide.
    Type: Grant
    Filed: October 8, 2013
    Date of Patent: October 21, 2014
    Assignee: API Intellectual Property Holdings, LLC
    Inventors: Thoedora Retsina, Vesa Pylkkanen
  • Publication number: 20140069599
    Abstract: 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.
    Type: Application
    Filed: November 15, 2013
    Publication date: March 13, 2014
    Applicant: Buckman Laboratories International, Inc.
    Inventors: Stephen D. Bryant, Kevin J. MacDonald, Bernard Janse, Xiangdong Zhou, Philip Hoekstra, Daniel E. Glover
  • Publication number: 20140048222
    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
  • 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: 8585863
    Abstract: A method for the production water insoluble reactive lignin having low sulfur content and lignosulfonates from lignocellulosic material in a batch or continuous process. Lignocellulosic material is fractionated to produce water insoluble native lignin and lignosulfonates in various ratios, while preserving the cellulose and hydrolyzed hemicelluloses using water, ethanol and sulfur dioxide.
    Type: Grant
    Filed: January 11, 2011
    Date of Patent: November 19, 2013
    Assignee: API Intellectual Property Holdings, LLC
    Inventors: Theodora Retsina, Vesa Pylkkanen
  • Publication number: 20130139981
    Abstract: 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.
    Type: Application
    Filed: February 4, 2013
    Publication date: June 6, 2013
    Inventors: Prasad Y. Duggirala, Xiaojin Harry Li
  • Patent number: 8404355
    Abstract: A method comprising: (a) providing a lignocellulosic substrate; (b) contacting said lignocellulosic substrate with an extractant comprising a water-soluble organic solvent to form an extracted substrate and a miscella; (c) removing miscella from said extracted substrate; and (d) hydrolyzing said extracted substrate using a chemically catalyzed process.
    Type: Grant
    Filed: December 9, 2011
    Date of Patent: March 26, 2013
    Assignee: Virdia Ltd
    Inventors: Robert Jansen, Aharon Eyal, Philippe Lavielle
  • Patent number: 8268125
    Abstract: A method for the fractionation of lignocellulosic materials into cellulose, hemicelluloses and lignin in a batch or continuous process in a treatment with vaporous mixture of aliphatic alcohol, sulfur dioxide and water. Cooking conditions are varied to get different proportions of cellulose, hemicelluloses and lignin. Chemical recovery through pressure release is described.
    Type: Grant
    Filed: March 23, 2009
    Date of Patent: September 18, 2012
    Assignee: API Intellectual Property Holdings, LLC
    Inventors: Theodora Retsina, Vesa Pylkkanen, Adriaan Reinhard P. van Heiningen
  • Patent number: 8262852
    Abstract: 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.
    Type: Grant
    Filed: July 8, 2010
    Date of Patent: September 11, 2012
    Assignee: Nalco Company
    Inventors: Prasad Y. Duggirala, Sergey M. Shevchenko
  • Publication number: 20120132379
    Abstract: The invention relates to a method for obtaining cellulose by separating lignin from a biomass comprising lignocellulose in the form of plants or plant parts, wherein the biomass comprising lignocellulose is solubilized in a boiler in an alkaline medium comprising alkanol amine, and dissolved lignin is separated from the resulting raw cellulose. Said method is characterized in that the biomass comprising lignocellulose is not from a wood source, and is solubilized at a temperature of less than approximately 170° C. in a solubilizing agent based on alkanol amine and water, wherein the weight ratio of alkanol amine to water is set to 80:20 to 20:80, and raw cellulose thus produced is separated from the waste lye using a typical method. Said method is particularly advantageous for obtaining cellulose from annual plants, particularly wheat straw. The method is advantageously improved in that the solubilization takes place in the presence of a catalyst, particularly of anthrachinon.
    Type: Application
    Filed: February 25, 2010
    Publication date: May 31, 2012
    Applicant: Zylum Beteiligungsgesellschaft MBH & Co Patente II KG
    Inventors: Rudolf Patt, Andreas Kreipl
  • Patent number: 8123904
    Abstract: 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.
    Type: Grant
    Filed: August 11, 2010
    Date of Patent: February 28, 2012
    Assignees: Wisconsin Alumni Research Foundation, Biopulping International Inc., The United States of America as represented by the Secretary of Agriculture
    Inventors: Masood Akhtar, William R. Kenealy, Eric G. Horn, Ross E. Swaney, Jerrold Winandy
  • Patent number: 8092647
    Abstract: The present invention is a method for producing a pulp from a fibrous lignocellulose material or source using a treatment or pretreatment step which exposes the material to oxalic acid derivatives, particularly dialkyl ester derivatives, particularly in the vapor phase. Once treated, the material may be refined using any one of the several pulping methods to produce a final pulp product and the production of the product is accompanied by strength increases in paper made from the pulp and energy savings in making the pulp, hi addition the treatment or pretreatment produces a soluble carbohydrate source and other components (e.g. acetic acid, other wood components) for further product development. In certain cases a pulp product is not produced and all of the carbohydrate present in the lignocellulose is converted into soluble sugars.
    Type: Grant
    Filed: July 10, 2006
    Date of Patent: January 10, 2012
    Assignees: Wisconsin Alumni Research Foundation, The United States of America as represented by the Secretary of Agriculture
    Inventors: Masood Akhtar, William Robert Kenealy, Eric Horn, Ross E. Swaney
  • Patent number: 8038840
    Abstract: A process for refining and producing cellulose, lignin and xylose from biomass material comprises the following steps: pulverizing and screening the biomass material; and then dipping the biomass material in organic acid with lower boiling point and decomposing it into xylose, xylo-oligosaccharide, cellulose and lignin to make the biomass material fluidify; cooling the fluidified biomass material after finishing the reaction, adding organic solvent, and mixing uniformly and standing; separating, washing and drying the precipitation to obtain amorphous cellulose after precipitating; distilling the mother solution of precipitation of cellulose and recovering the organic acid and the resulting volatile organic substance; standing the distilled mother solution after cooling, and then separating, washing and drying the precipitation to obtain xylose and xylo-oligosaccharide after precipitating; distilling and recovering the organic solvent in the mother solution of precipitation of xylose and xylo-oligosaccharide,
    Type: Grant
    Filed: March 6, 2008
    Date of Patent: October 18, 2011
    Inventor: Rongxiu Li
  • Patent number: 8038842
    Abstract: A method for the fractionation of lignocellulosic materials into cellulose, hemicelluloses and lignin in a batch or continuous process in a treatment with vaporous mixture of aliphatic alcohol, sulfur dioxide and water. Cooking conditions are varied to get different proportions of cellulose, hemicelluloses and lignin. Chemical recovery through pressure release is described.
    Type: Grant
    Filed: January 11, 2011
    Date of Patent: October 18, 2011
    Assignee: American Process, Inc.
    Inventors: Theodora Retsina, Vesa Pylkkanen, Adriaan van Heiningen
  • Patent number: 8022260
    Abstract: The present invention relates to the conversion of solid biomass to liquid fuels and specialty chemicals. The process utilizes an activating step to make the biomass more susceptible to conversion, that is the biomass is broken down such that the components of the biomass are dissociated. Subsequently, the activated biomass undergoes a reaction to convert it to a bio-oil.
    Type: Grant
    Filed: May 4, 2007
    Date of Patent: September 20, 2011
    Assignee: Kior Inc.
    Inventors: Paul O'Connor, Dennis Stamires, Sjoerd Daamen
  • Publication number: 20110220307
    Abstract: 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.
    Type: Application
    Filed: March 10, 2010
    Publication date: September 15, 2011
    Inventors: Prasad Y. Duggirala, Xiaojin Harry Li
  • Patent number: 7988788
    Abstract: Improvements in a process for rapid acid hydrolysis of lignocellulosic material and in a hydrolysis reactor, said lignocellulosic material being fed in different levels of a reactor and contacted with flows of lignin organic solvent, water and an extremely dilute solution of a strong inorganic acid, for obtaining a liquid phase of hydrolysis extract and a solid phase of non-reacted and non-dissolved material. A controlled steam flow is injected into the different levels of the reactor, so as to provide adequate temperatures of organic solvent and strong inorganic acid and forming the desired products (sugars). A flow of the liquid phase is recirculated in different levels of the reactor, the remainder thereof being withdrawn from the reactor, abruptly cooled with the solvent submitted to evaporation to obtain a concentrate. The lignin is transferred by decantation and the concentrate is transferred to subsequent process steps.
    Type: Grant
    Filed: October 31, 2006
    Date of Patent: August 2, 2011
    Assignee: Dedini S.A. Industrias De Base
    Inventor: Antonio Geraldo Proenca Hilst
  • Publication number: 20100319862
    Abstract: Disclosed herein are compositions and methods that involve ionic liquids and biomass. Multiphasic compositions involving ionic liquids and a polymer and uses of such compositions for fractioning various components of biomass are disclosed. Methods of making and using compositions comprising an ionic liquid, biomass, and a catalyst are also disclosed.
    Type: Application
    Filed: February 18, 2009
    Publication date: December 23, 2010
    Applicant: THE BOARD OF TRUSTEES OF THE UNIVERSITY OF ALABAMA
    Inventor: Mustafizur RAHMAN
  • Publication number: 20100285550
    Abstract: The invention relates to processes of delignifying lignocellulose-containing material, wherein the lignocellulose-containing material is treated with a delignification catalyst and a lignin solubilizing agent.
    Type: Application
    Filed: January 9, 2009
    Publication date: November 11, 2010
    Applicant: Novozymes A/S
    Inventor: Yongming Zhu
  • Publication number: 20100269993
    Abstract: 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.
    Type: Application
    Filed: July 8, 2010
    Publication date: October 28, 2010
    Inventors: Prasad Y. Duggirala, Sergey M. Shevchenko
  • Publication number: 20100159515
    Abstract: Lignocellulosic biomass comprising lignin is treated by selective extraction and oxidation of lignin using a solvent solution comprising water in combination with at least one Mn(III) salt to produce readily saccharifiable carbohydrate enriched biomass.
    Type: Application
    Filed: December 19, 2008
    Publication date: June 24, 2010
    Inventor: Jelena Cirakovic
  • Publication number: 20090199985
    Abstract: 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.
    Type: Application
    Filed: February 7, 2008
    Publication date: August 13, 2009
    Inventor: Surendra Jain
  • Publication number: 20090014138
    Abstract: 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.
    Type: Application
    Filed: February 10, 2006
    Publication date: January 15, 2009
    Applicant: Metso Paper, Inc.
    Inventors: Eric Enqvist, Panu Tikka, Leopold Heinrich, Matti Luhtanen
  • Publication number: 20080105392
    Abstract: 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.
    Type: Application
    Filed: November 3, 2006
    Publication date: May 8, 2008
    Inventors: Prasad Y. Duggirala, Sergey M. Shevchenko
  • Patent number: 7182836
    Abstract: The invention relates to a method for delignifying lignocellulosic raw materials by using sulfites in the presence of an alkaline component, especially sodium hydroxide or sodium carbonate or a mixture thereof in an aqueous solution at a high temperature and high pressure. The invention is characterized in that a first partial fragment of the alkaline component is added when the aqueous solution starts to decompose and in that at least a second partial fragment of the alkaline component is added only when delignification begins.
    Type: Grant
    Filed: July 1, 2002
    Date of Patent: February 27, 2007
    Assignee: Voith Paper Fiber Systems GmbH KG
    Inventors: Rudolf Patt, Othar Kordsachia, Bjorn Rose
  • Patent number: 7081183
    Abstract: This invention is a method of reducing the resin content of chemical pulps comprising heating wood chips in an aqueous alkaline medium in the presence of an effective deresinating amount of an alkyl alcohol alkoxylate of formula RO[(CH2CHCH3O)x(CH2CH2O)y]M wherein R is C4 to C40 alkyl; x is 1–50; y is 0–100 and M is H or an alkali metal, a cooking liquor comprising sodium hydroxide and sodium sulfite and the alkyl alcohol alkoxylate and a deresinated pulp prepared according to the method.
    Type: Grant
    Filed: July 23, 2002
    Date of Patent: July 25, 2006
    Assignee: Nalco Company
    Inventors: Prasad Y Duggirala, James J. Svarz
  • Patent number: 6923887
    Abstract: Disclosed is a method for pulp bleaching. The method comprises the steps of providing a pulp sample for bleaching, the pulp sample stemming from a pulp producing process, providing a bleaching liquor comprising water and an organic component as solvent components constituting a bleaching medium, dissolved within are at least a bleaching agent, and a basic agent; and subjecting the pulp sample to the bleaching liquor for a predefined amount of time at predefined bleaching conditions. A preferred bleaching agent is hydrogen peroxide. The organic component amounts to at least 5% in weight of the bleaching medium.
    Type: Grant
    Filed: February 21, 2003
    Date of Patent: August 2, 2005
    Assignee: Alberta Research Council Inc.
    Inventor: George Pan
  • Publication number: 20040177937
    Abstract: The invention relates to a method for delignifying lignocellulosic raw materials by using sulfites in the presence of an alkaline component, especially sodium hydroxide or sodium carbonate or a mixture thereof in an aqueous solution at a high temperature and high pressure. The invention is characterized in that a first partial fragment of the alkaline component is added when the aqueous solution starts to decompose and in that at least a second partial fragment of the alkaline component is added only when delignification begins.
    Type: Application
    Filed: December 29, 2003
    Publication date: September 16, 2004
    Inventors: Rudolf Patt, Othar Kordsachia, Bjorn Rose
  • Publication number: 20040163779
    Abstract: Disclosed is a method for pulp bleaching. The method comprises the steps of providing a pulp sample for bleaching, the pulp sample stemming from a pulp producing process, providing a bleaching liquor comprising water and an organic component as solvent components constituting a bleaching medium, dissolved within are at least a bleaching agent, and a basic agent; and subjecting the pulp sample to the bleaching liquor for a predefined amount of time at predefined bleaching conditions. A preferred bleaching agent is hydrogen peroxide. The organic component amounts to at least 5% in weight of the bleaching medium.
    Type: Application
    Filed: February 21, 2003
    Publication date: August 26, 2004
    Inventor: George Pan
  • Publication number: 20040154761
    Abstract: A method to enhance brightness in Chemical and Mechanical pulps comprising adding an organic sulfide chelant is described and claimed.
    Type: Application
    Filed: February 6, 2004
    Publication date: August 12, 2004
    Inventors: Prasad Y. Duggirala, Sergey M. Shevchenko, Kristine S. Salmen
  • Patent number: 6770168
    Abstract: A substantially sulfur free process for the manufacturing of a chemical pulp with an integrated recovery system for recovery of pulping chemicals is carried out on in several stages involving physical and chemical treatment of lignocellulosic material in order to increase accessibility of the lignocellulosic material to reactions with an oxygen-based delignification agent. Spent cellulose liquor comprising lignin components and spent chemical reagents is fully or partially oxidized in a gas generator wherein a stream of hot raw gas and a stream of alkaline chemicals and chemical reagents is formed for subsequent recycle and reuse in the pulp manufacturing process.
    Type: Grant
    Filed: August 14, 2001
    Date of Patent: August 3, 2004
    Assignee: Kiram AB
    Inventor: Lars Stigsson
  • Publication number: 20040099386
    Abstract: Separation of dissolved and colloidal high molecular weight organic by-products from liquors or filtrates in a cellulosic pulping process to improve the overall efficiency of the process.
    Type: Application
    Filed: November 20, 2003
    Publication date: May 27, 2004
    Inventor: Craig A. Bianchini
  • Patent number: 6740199
    Abstract: The invention relates to a process for digesting woodchips used in papermaking. The process employs digester additive, which comprises a sultaine or mixtures of a sultaine with a nonionic surfactant selected from the group consisting of (a) polyglycosides, (b) polyoxyalkylene glycols, and (c) mixtures thereof as digester additives. The digester additives are compatible and stable at elevated temperatures in the highly alkaline white liquor used in the digestion of woodchips into pulp. The invention also relates to the digester additive compositions.
    Type: Grant
    Filed: July 26, 2001
    Date of Patent: May 25, 2004
    Assignee: Ashland Inc.
    Inventors: Abdul Q. Khan, George K. Wai
  • Patent number: 6719880
    Abstract: A process for producing paper and absorbent products of increased strength includes extracting wood particulates with a solvent selected from methanol, ethanol, and acetone at a pressure less than 50 psi to reduce the pitch and volatile organic compounds of the particulates without significant dissolution of lignin and cellulosic components. The wood particulates are pulped to produce a pulp with reduced pitch content. A slurry is prepared from the pulp and used to form paper products.
    Type: Grant
    Filed: November 6, 2001
    Date of Patent: April 13, 2004
    Assignee: Weyerhaeuser Company
    Inventors: Jerry R. Speaks, Roger O. Campbell, Michael A. Veal
  • Patent number: 6706144
    Abstract: A method of dewatering an aqueous cellulosic pulp slurry comprising adding to an aqueous slurry of washed cellulosic pulp an effective dewatering amount of a mixture of one or more nonionic surfactants and one or more anionic surfactants.
    Type: Grant
    Filed: June 18, 2002
    Date of Patent: March 16, 2004
    Assignee: Ondeo Nalco Company
    Inventors: Gary S. Furman, Jr., James J. Svarz
  • Publication number: 20040016526
    Abstract: This invention is a method of reducing the resin content of chemical pulps comprising heating wood chips in an aqueous alkaline medium in the presence of an effective deresinating amount of an alkyl alcohol alkoxylate of formula RO[(CH2CHCH3O)x(CH2CH2O)y]M wherein R is C4 to C40 alkyl; x is 1-50; y is 0-100 and M is H or an alkali metal, a cooking liquor comprising sodium hydroxide and sodium sulfite and the alkyl alcohol alkoxylate and a deresinated pulp prepared according to the method.
    Type: Application
    Filed: July 23, 2002
    Publication date: January 29, 2004
    Inventors: Prasad Y. Duggirala, James J. Svarz
  • Publication number: 20040016525
    Abstract: This invention relates to a process of treating a lignocellulosic material to produce bio-ethanol. The process includes the steps of: (a) exposing the ligno-cellulosic material to conditions including a pH not less than about 8, and steam at a first pressure, to produce a step (a) product; (b) explosively discharging the step (a) product to a second pressure less than the first pressure-to produce a step (b) product; and (c) further processing the step (b) product to produce bio-ethanol and other co-products. In another embodiment, the invention relates to a conical auger fractionation column. The fractionation column includes a column body having an input and an output. A conical filter is positioned inside the column body, the filter having a larger diameter end directed toward the input and a smaller diameter end directed toward the output.
    Type: Application
    Filed: February 24, 2003
    Publication date: January 29, 2004
    Inventor: Gibson W. Gervais
  • Publication number: 20040000381
    Abstract: Polynuclear compounds dissolved and contained within an organic solvent are separated from the organic solvent by rendering the organic compounds insoluble within the organic solvent. Accordingly this invention removes polynuclear compounds from a saturated organic solvent. The polynuclear compounds are derived from black liquor obtained from kraft digestion. Whereby polynuclear compounds, substantially free of an organic solvent, are obtained from the organic solvent.
    Type: Application
    Filed: July 1, 2002
    Publication date: January 1, 2004
    Inventor: Gene E. Lightner
  • Publication number: 20030221806
    Abstract: A paper stock with at least one side dyed or tinted such that each side has a different color or shade to provide an indication of any erasures on the dyed or tinted side of the paper. Machinery and systems are disclosed for practicing the method of making the inventive paper.
    Type: Application
    Filed: February 14, 2003
    Publication date: December 4, 2003
    Inventors: Larry J. Naumann, Michael A. Baker
  • Patent number: 6649023
    Abstract: The invention relates to a process for digesting woodchips used in papermaking. The process employs a digester additive, which is a mixture of (a) a polyglycoside, and (b) a polyoxyalkylene glycol. The digester additives are compatible and stable at elevated temperatures in the highly alkaline white liquor used in the digestion of wood chips into pulp. The invention also relates to the digester additive compositions.
    Type: Grant
    Filed: February 28, 2003
    Date of Patent: November 18, 2003
    Assignee: Ashland Inc.
    Inventors: George K. Wai, Abdul Q. Khan
  • Publication number: 20030205343
    Abstract: A continuous pulp digester having an elongate horizontally aligned pressure vessel through which the wood chips and digesting fluid flow in a forward direction. In a first and second embodiments within the pressure vessel there is an inner container defining an elongate chamber or passageway having a square cross sectional configuration. In a third embodiment the digesting chamber is cylindrical. At locations along the digester, there are several pair of liquid flow inlets and liquid flow outlets which enable filtrate from a pulp washer and a digesting agent to be moved into and across the digesting chamber to flow out the flow outlets. These are recirculated in a net upstream flow pattern toward the outlet end of the digester, and discharged as black liquor at different locations in the digester.
    Type: Application
    Filed: April 18, 2003
    Publication date: November 6, 2003
    Inventor: Reijo K. Salminen
  • Patent number: 6641699
    Abstract: A chemical wood pulping process having reduced volatile organic compound emissions includes extracting wood particulates with solvent at a pressure less than 50 psi to reduce naturally-occurring particulate pitch and volatile organic compound content without significant dissolution of lignin and wood cellulosic components. The solvent used is methanol, ethanol, or acetone. This is followed by comingling the extracted wood particulates with a liquor having chemical reactants, not including the solvent used to extract the wood particulates, for solubilizing lignin. Then, allowing the chemical reactants of the liquor to react with lignin contained in the extracted wood particulates under controlled conditions of temperature and pressure for a sufficient time to solubilize and remove lignin. This is followed by producing a wood pulp having individual cellulosic fibers while releasing a reduced amount of VOCs in the wood pulping process.
    Type: Grant
    Filed: November 6, 2001
    Date of Patent: November 4, 2003
    Assignee: Weyerhauser Company
    Inventors: Jerry R. Speaks, Roger O. Campbell, Michael A. Veal
  • Publication number: 20030192660
    Abstract: A paper product having a mass of cellulosic fibers produced from wood, where the fibers have a pitch content reduced by at least about 40% as compared to an expected pitch content based on naturally-occurring levels of pitch in the wood is disclosed.
    Type: Application
    Filed: June 17, 2003
    Publication date: October 16, 2003
    Applicant: Weyerhaeuser Company
    Inventors: Jerry R. Speaks, Roger O. Campbell, Michael A. Veal
  • Patent number: 6596908
    Abstract: A process for the recovery of furfural, furfuryl alcohol, low molecular weight phenols and/or cellulose or a cellulose-rich material from a lignocellulosic material comprising: feeding a carrier gas into a reaction chamber to facilitate a fluidised bed effect and to carry reaction products and residues away from the reactor via entrainment; introducing a feedstock comprising particulate lignocellulosic material of a predetermined particle size into the reaction chamber; degrading the feedstock in the reaction chamber under an oxygen-containing atmosphere at a temperature of from 250° C. to 320° C.; and quenching the degraded feedstock and carrier gas to deposit solid residue entrained in the carrier gas and to condense a liquid product.
    Type: Grant
    Filed: October 1, 2001
    Date of Patent: July 22, 2003
    Assignee: The University of Melbourne
    Inventors: Branko Hermescec, David Arthur Edward Butt
  • Publication number: 20030089472
    Abstract: 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: Application
    Filed: December 20, 2001
    Publication date: May 15, 2003
    Inventors: Huai N. Cheng, Simon Delagrave, Qu-Ming Gu, Daniel Michalopoulos, Dennis J. Murphy
  • Patent number: 6551452
    Abstract: The invention relates to a process for digesting woodchips used in papermaking. The process employs a digester additive, which is a mixture of (a) a polyglycoside, and (b) a polyoxyalkylene glycol. The digester additives are compatible and stable at elevated temperatures in the highly alkaline white liquor used in the digestion of woodchips into pulp. The invention also relates to the digester additive compositions.
    Type: Grant
    Filed: July 26, 2001
    Date of Patent: April 22, 2003
    Assignee: Ashland Inc.
    Inventors: George K. Wai, Abdul Q. Khan
  • Patent number: 6524435
    Abstract: A method of dispersing hydrophobic particles in aqueous suspensions comprising adding to the suspension an effective amount of an ethylene oxide-propylene oxide block copolymer, wherein the copolymer has a molecular weight of from about 1,000 to about 50,000 and a HLB of from about 1 to about 4 and compositions comprising the ethylene oxide-propylene oxide block copolymer.
    Type: Grant
    Filed: May 8, 2000
    Date of Patent: February 25, 2003
    Assignee: Ondeo Nalco Company
    Inventors: Sameer B. Agarwal, Phillip W. Carter, Martin J. Coffey
  • Publication number: 20030019593
    Abstract: Separation of dissolved and colloidal high molecular weight organic by-products from liquors or filtrates in a cellulosic pulping process to improve the overall efficiency of the process.
    Type: Application
    Filed: July 27, 2001
    Publication date: January 30, 2003
    Inventor: Craig A. Bianchini