Acids, Salts Or Esters Patents (Class 162/76)
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Publication number: 20130102667Abstract: An acetyl xylan esterase variant having perhydrolytic activity is provided for producing peroxycarboxylic acids from carboxylic acid esters and a source of peroxygen. More specifically, a Thermotoga maritima acetyl xylan esterase gene was modified using error-prone PCR and site-directed mutagenesis to create an enzyme catalyst characterized by an increase in specific activity. The variant acetyl xylan esterase may be used to produce peroxycarboxylic acids suitable for use in a variety of applications such as cleaning, disinfecting, sanitizing, bleaching, wood pulp processing, and paper pulp processing applications.Type: ApplicationFiled: October 22, 2012Publication date: April 25, 2013Applicant: E. I. DU PONT DE NEMOURS AND COMPANYInventor: E.I. Du Pont De Nemours And Company
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Publication number: 20130102668Abstract: An acetyl xylan esterase variant having perhydrolytic activity is provided for producing peroxycarboxylic acids from carboxylic acid esters and a source of peroxygen. More specifically, a Thermotoga maritima acetyl xylan esterase gene was modified using error-prone PCR and site-directed mutagenesis to create an enzyme catalyst characterized by an increase in specific activity. The variant acetyl xylan esterase may be used to produce peroxycarboxylic acids suitable for use in a variety of applications such as cleaning, disinfecting, sanitizing, bleaching, wood pulp processing, and paper pulp processing applications.Type: ApplicationFiled: October 22, 2012Publication date: April 25, 2013Applicant: E. I. DU PONT DE NEMOURS AND COMPANYInventor: E. I. Du Pont De Nemours And Company
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Publication number: 20130102664Abstract: An acetyl xylan esterase variant having perhydrolytic activity is provided for producing peroxycarboxylic acids from carboxylic acid esters and a source of peroxygen. More specifically, a Thermotoga maritima acetyl xylan esterase gene was modified using error-prone PCR and site-directed mutagenesis to create an enzyme catalyst characterized by an increase in specific activity. The variant acetyl xylan esterase may be used to produce peroxycarboxylic acids suitable for use in a variety of applications such as cleaning, disinfecting, sanitizing, bleaching, wood pulp processing, and paper pulp processing applications.Type: ApplicationFiled: October 22, 2012Publication date: April 25, 2013Applicant: E. I. DU PONT DE NEMOURS AND COMPANYInventor: E. I. du Pont de Nemours and Company
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Publication number: 20130102670Abstract: An acetyl xylan esterase variant having perhydrolytic activity is provided for producing peroxycarboxylic acids from carboxylic acid esters and a source of peroxygen. More specifically, a Thermotoga maritima acetyl xylan esterase gene was modified using error-prone PCR and site-directed mutagenesis to create an enzyme catalyst characterized by an increase in specific activity. The variant acetyl xylan esterase may be used to produce peroxycarboxylic acids suitable for use in a variety of applications such as cleaning, disinfecting, sanitizing, bleaching, wood pulp processing, and paper pulp processing applications.Type: ApplicationFiled: October 22, 2012Publication date: April 25, 2013Applicant: E. I. DU PONT DE NEMOURS AND COMPANYInventor: E. I. Du Pont De Nemours And Company
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Publication number: 20130102669Abstract: An acetyl xylan esterase variant having perhydrolytic activity is provided for producing peroxycarboxylic acids from carboxylic acid esters and a source of peroxygen. More specifically, a Thermotoga maritima acetyl xylan esterase gene was modified using error-prone PCR and site-directed mutagenesis to create an enzyme catalyst characterized by an increase in specific activity. The variant acetyl xylan esterase may be used to produce peroxycarboxylic acids suitable for use in a variety of applications such as cleaning, disinfecting, sanitizing, bleaching, wood pulp processing, and paper pulp processing applications.Type: ApplicationFiled: October 22, 2012Publication date: April 25, 2013Applicant: E. I. DU PONT DE NEMOURS AND COMPANYInventor: E. I. Du Pont De Nemours And Company
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Publication number: 20130102671Abstract: An acetyl xylan esterase variant having perhydrolytic activity is provided for producing peroxycarboxylic acids from carboxylic acid esters and a source of peroxygen. More specifically, a Thermotoga maritima acetyl xylan esterase gene was modified using error-prone PCR and site-directed mutagenesis to create an enzyme catalyst characterized by an increase in specific activity. The variant acetyl xylan esterase may be used to produce peroxycarboxylic acids suitable for use in a variety of applications such as cleaning, disinfecting, sanitizing, bleaching, wood pulp processing, and paper pulp processing applications.Type: ApplicationFiled: October 22, 2012Publication date: April 25, 2013Applicant: E. I. DU PONT DE NEMOURS AND COMPANYInventor: E. I. Du Pont De Nemours And Company
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Publication number: 20130102672Abstract: An acetyl xylan esterase variant having perhydrolytic activity is provided for producing peroxycarboxylic acids from carboxylic acid esters and a source of peroxygen. More specifically, a Thermotoga maritima acetyl xylan esterase gene was modified using error-prone PCR and site-directed mutagenesis to create an enzyme catalyst characterized by an increase in specific activity. The variant acetyl xylan esterase may be used to produce peroxycarboxylic acids suitable for use in a variety of applications such as cleaning, disinfecting, sanitizing, bleaching, wood pulp processing, and paper pulp processing applications.Type: ApplicationFiled: October 22, 2012Publication date: April 25, 2013Applicant: E. I. DU PONT DE NEMOURS AND COMPANYInventor: E.I. Du Pont De Nemours And Company
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Publication number: 20130102665Abstract: An acetyl xylan esterase variant having perhydrolytic activity is provided for producing peroxycarboxylic acids from carboxylic acid esters and a source of peroxygen. More specifically, a Thermotoga maritima acetyl xylan esterase gene was modified using error-prone PCR and site-directed mutagenesis to create an enzyme catalyst characterized by an increase in specific activity. The variant acetyl xylan esterase may be used to produce peroxycarboxylic acids suitable for use in a variety of applications such as cleaning, disinfecting, sanitizing, bleaching, wood pulp processing, and paper pulp processing applications.Type: ApplicationFiled: October 22, 2012Publication date: April 25, 2013Applicant: E. I. DU PONT DE NEMOURS AND COMPANYInventor: E. I. du Pont de Nemours and Company
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Publication number: 20130102666Abstract: An acetyl xylan esterase variant having perhydrolytic activity is provided for producing peroxycarboxylic acids from carboxylic acid esters and a source of peroxygen. More specifically, a Thermotoga maritima acetyl xylan esterase gene was modified using error-prone PCR and site-directed mutagenesis to create an enzyme catalyst characterized by an increase in specific activity. The variant acetyl xylan esterase may be used to produce peroxycarboxylic acids suitable for use in a variety of applications such as cleaning, disinfecting, sanitizing, bleaching, wood pulp processing, and paper pulp processing applications.Type: ApplicationFiled: October 22, 2012Publication date: April 25, 2013Applicant: E. I. DU PONT DE NEMOURS AND COMPANYInventor: E. I. Du Pont De Nemours And Company
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Publication number: 20130042986Abstract: 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.Type: ApplicationFiled: February 14, 2011Publication date: February 21, 2013Applicant: DEQUEST AGInventors: Thierry Jules Guilmin, Patrick Notté
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Patent number: 8366877Abstract: 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: GrantFiled: March 10, 2010Date of Patent: February 5, 2013Assignee: Nalco CompanyInventors: Prasad Y. Duggirala, Xiaojin Harry Li
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Publication number: 20130000855Abstract: 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.Type: ApplicationFiled: November 5, 2010Publication date: January 3, 2013Applicant: UPM-KYMMENE CORPORATIONInventors: Markus Nuopponen, Taru Päiväläinen, Antti Laukkanen, Jouni Paltakari
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Patent number: 8308901Abstract: The disclosure provides a process of modifying a seed based fiber (SBF) to form an enhanced fiber additive (EFA). The process includes an acid treatment step and optionally at least one fiber modification step. Preferred EFA products and uses are described.Type: GrantFiled: October 13, 2010Date of Patent: November 13, 2012Assignee: Cargill, IncorporatedInventors: Kevin R. Anderson, David E. Garlie, Paula R. Krogmann, John T. McDonald, Jagannadh V. Satyavolu
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Publication number: 20120186762Abstract: 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.Type: ApplicationFiled: January 24, 2012Publication date: July 26, 2012Applicant: BASF SEInventors: Stefan Faßbender, Christoph Lessig
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Publication number: 20120168102Abstract: A method for producing pulp by extracting hemicellulosic materials from lignocellulosic materials using water in an extraction stage, wherein the extraction stage is either a single extraction or a double extraction process; treating the lignocellulosic materials with an oxidizing agent in a treatment stage, wherein the treatment stage is selected from the group consisting of a second extraction process, an agent impregnation process, and a first pretreatment process; treating the lignocellulosic materials with a reducing agent in the treatment stage, wherein the treatment stage is selected from the group consisting of the second extraction process, the agent impregnation process, and a second pretreatment process; and then subjecting the lignocellulosic materials to a modified Kraft pulping process to produce pulp.Type: ApplicationFiled: April 2, 2010Publication date: July 5, 2012Inventors: Sung-Hoon Yoon, Harry T. Cullinan, Gopal A. Krishnagopalan
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Publication number: 20120156158Abstract: An acetyl xylan esterase variant having perhydrolytic activity is provided for producing peroxycarboxylic acids from carboxylic acid esters and a source of peroxygen. More specifically, a Thermotoga maritima acetyl xylan esterase gene was modified using error-prone PCR and site-directed mutagenesis to create an enzyme catalyst characterized by an increase in specific activity. The variant acetyl xylan esterase may be used to produce peroxycarboxylic acids suitable for use in a variety of applications such as cleaning, disinfecting, sanitizing, bleaching, wood pulp processing, and paper pulp processing applications.Type: ApplicationFiled: December 16, 2011Publication date: June 21, 2012Inventors: Robert DiCosimo, Mark Scott Payne, John Edward Gavagan
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Publication number: 20120156156Abstract: An acetyl xylan esterase variant having perhydrolytic activity is provided for producing peroxycarboxylic acids from carboxylic acid esters and a source of peroxygen. More specifically, a Thermotoga maritima acetyl xylan esterase gene was modified using error-prone PCR and site-directed mutagenesis to create an enzyme catalyst characterized by an increase in specific activity. The variant acetyl xylan esterase may be used to produce peroxycarboxylic acids suitable for use in a variety of applications such as cleaning, disinfecting, sanitizing, bleaching, wood pulp processing, and paper pulp processing applications.Type: ApplicationFiled: December 16, 2011Publication date: June 21, 2012Inventors: Robert Dicosimo, Mark Scott Payne, John Edward Gavagan
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Publication number: 20120156155Abstract: An acetyl xylan esterase variant having perhydrolytic activity is provided for producing peroxycarboxylic acids from carboxylic acid esters and a source of peroxygen. More specifically, a Thermotoga maritima acetyl xylan esterase gene was modified using error-prone PCR and site-directed mutagenesis to create an enzyme catalyst characterized by an increase in specific activity. The variant acetyl xylan esterase may be used to produce peroxycarboxylic acids suitable for use in a variety of applications such as cleaning, disinfecting, sanitizing, bleaching, wood pulp processing, and paper pulp processing applications.Type: ApplicationFiled: December 16, 2011Publication date: June 21, 2012Inventors: Robert Dicosimo, Mark Scott Payne, John Edward Gavagan
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Publication number: 20120156748Abstract: A process for treatment of a lignocellulosic material comprising contacting the lignocellulosic material with a solution of chloride ions, which solution comprises a concentration of chloride ions in the range from equal to or more than 1 ppm weight to equal to or less than 350 ppm weight based on the total weight of the solution; at a temperature in the range from equal to or more than 120° C. to equal to or less than 200° C.; and at a pH in the range from equal to or more than 0.1 to equal to or less than 4.Type: ApplicationFiled: December 20, 2011Publication date: June 21, 2012Applicant: SHELL OIL COMPANYInventors: Wilhelmus Maria BOS, Evert VAN DER HEIDE, Jan Gerrit DE JONG, Munro MACKAY
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Publication number: 20120156159Abstract: An acetyl xylan esterase variant having perhydrolytic activity is provided for producing peroxycarboxylic acids from carboxylic acid esters and a source of peroxygen. More specifically, a Thermotoga maritima acetyl xylan esterase gene was modified using error-prone PCR and site-directed mutagenesis to create an enzyme catalyst characterized by an increase in specific activity. The variant acetyl xylan esterase may be used to produce peroxycarboxylic acids suitable for use in a variety of applications such as cleaning, disinfecting, sanitizing, bleaching, wood pulp processing, and paper pulp processing applications.Type: ApplicationFiled: December 16, 2011Publication date: June 21, 2012Inventors: Robert DiCosimo, Mark Scott Payne, John Edward Gavagan
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Publication number: 20120156157Abstract: An acetyl xylan esterase variant having perhydrolytic activity is provided for producing peroxycarboxylic acids from carboxylic acid esters and a source of peroxygen. More specifically, a Thermotoga maritima acetyl xylan esterase gene was modified using error-prone PCR and site-directed mutagenesis to create an enzyme catalyst characterized by an increase in specific activity. The variant acetyl xylan esterase may be used to produce peroxycarboxylic acids suitable for use in a variety of applications such as cleaning, disinfecting, sanitizing, bleaching, wood pulp processing, and paper pulp processing applications.Type: ApplicationFiled: December 16, 2011Publication date: June 21, 2012Inventors: Robert DiCosimo, Mark Scott Payne, John Edward Gavagan
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Patent number: 8182650Abstract: A method of producing a modified pulp comprising treating wood chips in an extraction process to remove hemicellose to form treated wood chips; and subjecting said treated wood chips to chemical or semichemical pulping to form a modified Kraft pulp wherein the amount of hemicellulose contained in the modified Kraft pulp is from about 5 to about 10% by dry weight of the modified pulp.Type: GrantFiled: March 5, 2009Date of Patent: May 22, 2012Assignee: International Paper CompanyInventors: Zheng Tan, Gopal Goyal, Alexander A. Koukoulas
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Publication number: 20120061043Abstract: 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 Mg2+, the carboxylic acid being substituted by at least one electrodonating group or comprising at least one carbon-carbon double bond.Type: ApplicationFiled: May 28, 2010Publication date: March 15, 2012Applicant: SOLVAY SAInventor: Pierre Dournel
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Patent number: 8123904Abstract: 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: GrantFiled: August 11, 2010Date of Patent: February 28, 2012Assignees: Wisconsin Alumni Research Foundation, Biopulping International Inc., The United States of America as represented by the Secretary of AgricultureInventors: Masood Akhtar, William R. Kenealy, Eric G. Horn, Ross E. Swaney, Jerrold Winandy
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Patent number: 8092647Abstract: 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: GrantFiled: July 10, 2006Date of Patent: January 10, 2012Assignees: Wisconsin Alumni Research Foundation, The United States of America as represented by the Secretary of AgricultureInventors: Masood Akhtar, William Robert Kenealy, Eric Horn, Ross E. Swaney
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Publication number: 20110300586Abstract: Described herein are improved methods of pretreating lignocellulosic biomass. One aspect of the invention relates to a two-stage pretreatment process comprising a relatively low severity steam treatment, a controlled pH pretreatment, or autohydrolysis, followed by hydrolysis with dilute acid or hot water at a relatively low temperature. In certain embodiments, the methods increase hemicellulose sugar yields, substrate digestibility, and suitability for fermentation as compared to steam explosion or acid hydrolysis alone. The two-stage pretreatment processes also employ few chemicals, minimizing the costs associated with pretreatment of lignocellulosic biomass. Moreover, the two-stage pretreatment process may expand the range of suitable feedstocks for bioethanol production.Type: ApplicationFiled: December 18, 2009Publication date: December 8, 2011Inventors: Chaogang Liu, Kevin Wenger
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Patent number: 8066846Abstract: The invention relates to a stabilizing composition comprising following components (A) a polymer having the following formula: wherein R1 is a hydrogen atom or an alkyl group containing 1 to 12 carbon atoms, R2 is —COOM or —CH2COOM, M is a hydrogen atom, an alkali metal ion, an alkaline earth metal ion, an ammonium ion or a mixture thereof, n, m and k are molar ratios of corresponding monomers, wherein n is 0 to 0.95, m is 0.05 to 0.9, and k is 0 to 0.8, and (n+m+k) equals 1, and the weight average molecular weight is between 500 and 20,000,000 g/mol, (B) a chelating agent, (C) a poly-alpha-hydroxyacrylic acid or an alkaline salt thereof or the corresponding polylactone thereof, and (D) optionally a polycarboxylic acid polymer or an alkaline salt thereof. The invention also relates to a process for the treatment of a fiber material.Type: GrantFiled: January 31, 2008Date of Patent: November 29, 2011Assignee: Kemira OyjInventors: Aarto Parén, Jukka Jäkärä, Jukka Rautiainen, Reijo Aksela, Ilkka Renvall, Anna Ilomäki, Minna Sankari, Anna Sundquist, Heli Virkki, Hannu Hämäläinen
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Publication number: 20110284175Abstract: 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.Type: ApplicationFiled: December 3, 2009Publication date: November 24, 2011Inventors: Yujun Sun, Richard Mckinnon Berry, Theodore Radiotis
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Patent number: 8063008Abstract: A process is provided to produce a concentrated aqueous peracid solution in situ using at least one enzyme having perhydrolase activity in the presence of hydrogen peroxide (at a concentration of at least 500 mM) under neutral to acidic reaction conditions from suitable carboxylic acid esters (including glycerides) and/or amides substrates. The concentrated peracid solution produced is sufficient for use in a variety of disinfection and/or bleaching applications.Type: GrantFiled: May 22, 2009Date of Patent: November 22, 2011Assignee: E. I. du Pont de Nemours and CompanyInventors: Robert DiCosimo, Mark Scott Payne, Eugenia Costa Hann, Vincent Brian Croud, John Edward Gavagan, Lorraine Winona Wagner
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Patent number: 8052840Abstract: 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.Type: GrantFiled: August 5, 2009Date of Patent: November 8, 2011Assignee: Hercules IncorporatedInventor: Davit E. Sharoyan
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Patent number: 8048264Abstract: The present invention relates to a stabilizing composition comprising following components (A) a polymer having following formula wherein R1 is a hydrogen atom or an alkyl group containing 1 to 12 carbon atoms, R2 is —COOM or —CH2COOM, M is a hydrogen atom, an alkali metal ion, an alkaline earth metal ion, an ammonium ion or a mixture thereof, n, m and k are molar ratios of corresponding monomers, wherein n is 0 to 0.95, m is 0.05 to 0.9, and k is 0 to 0.8, and (n+m+k) equals 1, and the weight average molecular weight is between 500 and 20,000,000 g/mol, (B) a chelating agent, and (C) an alkaline earth metal compound. The invention also relates to a process for the treatment of a fiber material.Type: GrantFiled: May 10, 2005Date of Patent: November 1, 2011Assignee: Kemira OyjInventors: Aarto Parén, Jonni Ahlgren, Jukka Jäkärä, Ilkka Renvall, Jukka Rautiainen
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Publication number: 20110259536Abstract: A process for making a material for acquisition of liquids comprising individualized, crosslinked cellulosic fibers having an effective amount of a polymeric acid crosslinking agent reacted with the fibers in intra-fiber crosslink ester bond form. A process for making disposable absorbent articles, such as diapers, containing this material.Type: ApplicationFiled: July 7, 2011Publication date: October 27, 2011Inventors: Andreas Flohr, Marion Lutsche
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Publication number: 20110263836Abstract: A method for treating lignin-containing fibrous material to reduce its susceptibility to yellowing generally includes enzymatically stabilizing the lignin of the material with an oxidizing agent capable of oxidizing phenolic or similar groups, which may undergo reactions conductive to the formation of colored sites on the fibers, and treating the material with a fluorescent whitening agent. Also disclosed are lignin-containing materials obtained by the method.Type: ApplicationFiled: April 17, 2009Publication date: October 27, 2011Applicant: KEMIRA OYJInventors: Veli-Matti Vuorenpalo, Jaakko Pere, Reijo Aksela, Andrei Tauber
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Patent number: 8038840Abstract: 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: GrantFiled: March 6, 2008Date of Patent: October 18, 2011Inventor: Rongxiu Li
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Publication number: 20110236339Abstract: An acetyl xylan esterase variant having perhydrolytic activity is provided for producing peroxycarboxylic acids from carboxylic acid esters and a source of peroxygen. More specifically, a Thermotoga maritima acetyl xylan esterase gene was modified using error-prone PCR and site-directed mutagenesis to create an enzyme catalyst characterized by an increase in specific activity. The variant acetyl xylan esterase may be used to produce peroxycarboxylic acids suitable for use in a variety of applications such as cleaning, disinfecting, sanitizing, bleaching, wood pulp processing, and paper pulp processing applications.Type: ApplicationFiled: March 23, 2011Publication date: September 29, 2011Inventors: ROBERT DICOSIMO, John Edward Gavagan, Mark Scott Payne
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Publication number: 20110236337Abstract: An acetyl xylan esterase variant having perhydrolytic activity is provided for producing peroxycarboxylic acids from carboxylic acid esters and a source of peroxygen. More specifically, a Thermotoga maritima acetyl xylan esterase gene was modified using error-prone PCR and site-directed mutagenesis to create an enzyme catalyst characterized by an increase in specific activity. The variant acetyl xylan esterase may be used to produce peroxycarboxylic acids suitable for use in a variety of applications such as cleaning, disinfecting, sanitizing, bleaching, wood pulp processing, and paper pulp processing applications.Type: ApplicationFiled: March 23, 2011Publication date: September 29, 2011Inventors: Robert Dicosimo, John Edward Gavagan, Mark Scott Payne
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Publication number: 20110236338Abstract: An acetyl xylan esterase variant having perhydrolytic activity is provided for producing peroxycarboxylic acids from carboxylic acid esters and a source of peroxygen. More specifically, a Thermotoga maritima acetyl xylan esterase gene was modified using error-prone PCR and site-directed mutagenesis to create an enzyme catalyst characterized by an increase in specific activity. The variant acetyl xylan esterase may be used to produce peroxycarboxylic acids suitable for use in a variety of applications such as cleaning, disinfecting, sanitizing, bleaching, wood pulp processing, and paper pulp processing applications.Type: ApplicationFiled: March 23, 2011Publication date: September 29, 2011Inventors: Robert Dicosimo, John Edward Gavagan, Mark Scott Payne
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Publication number: 20110236336Abstract: An acetyl xylan esterase variant having perhydrolytic activity is provided for producing peroxycarboxylic acids from carboxylic acid esters and a source of peroxygen. More specifically, a Thermotoga maritima acetyl xylan esterase gene was modified using error-prone PCR and site-directed mutagenesis to create an enzyme catalyst characterized by an increase in specific activity. The variant acetyl xylan esterase may be used to produce peroxycarboxylic acids suitable for use in a variety of applications such as cleaning, disinfecting, sanitizing, bleaching, wood pulp processing, and paper pulp processing applications.Type: ApplicationFiled: March 23, 2011Publication date: September 29, 2011Inventors: ROBERT DICOSIMO, John Edward Gavagan, Mark Scott Payne
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Publication number: 20110236335Abstract: An acetyl xylan esterase variant having perhydrolytic activity is provided for producing peroxycarboxylic acids from carboxylic acid esters and a source of peroxygen. More specifically, a Thermotoga maritima acetyl xylan esterase gene was modified using error-prone PCR and site-directed mutagenesis to create an enzyme catalyst characterized by an increase in specific activity. The variant acetyl xylan esterase may be used to produce peroxycarboxylic acids suitable for use in a variety of applications such as cleaning, disinfecting, sanitizing, bleaching, wood pulp processing, and paper pulp processing applications.Type: ApplicationFiled: March 23, 2011Publication date: September 29, 2011Inventors: Robert Dicosimo, John Edward Gavagan, Mark Scott Payne
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Patent number: 7988821Abstract: The invention relates to a process for the treatment of a fibre material comprising the step of contacting the fibre material in an aqueous medium with a chelating agent and a polymer having following general formula wherein R1 is a hydrogen atom or an alkyl group containing 1 to 12 carbon atoms, R2 is —COOM or —CH2COOM, M is a hydrogen atom, an alkali metal ion, an alkaline earth metal ion, an ammonium ion or a mixture thereof, n, m and k are molar ratios of corresponding monomers, wherein n is 0 to 0.95, m is 0.05 to 0.9, and k is 0 to 0.8, and (n+m+k) equals 1, and the weight average molecular weight is between 500 and 20,000,000 g/mol. The invention also relates to a composition comprising a chelating agent and the above polymer.Type: GrantFiled: June 13, 2007Date of Patent: August 2, 2011Assignee: Kemira OyjInventors: Seung-Hoon Lee, Jonni Ahlgren, Jukka Jäkärä, Aarto Parén, Jukka Rautiainen, Ilkka Renvall
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Publication number: 20110152368Abstract: An acetyl xylan esterase variant having perhydrolytic activity is provided for producing peroxycarboxylic acids from carboxylic acid esters and a source of peroxygen. More specifically, a Thermotoga maritima acetyl xylan esterase gene was modified using error-prone PCR and site-directed mutagenesis to create an enzyme catalyst characterized by an increase in the ratio of peracetic acid formation to peracetic acid hydrolysis specific activities (PAAF/PAAH ratio). The variant acetyl xylan esterase may be used to produce peroxycarboxylic acids suitable for use in a variety of applications such as cleaning, disinfecting, sanitizing, bleaching, wood pulp processing, and paper pulp processing applications.Type: ApplicationFiled: February 28, 2011Publication date: June 23, 2011Inventors: ROBERT DICOSIMO, John Edward Gavagan, Mark S. Payne
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Publication number: 20110150857Abstract: An acetyl xylan esterase variant having perhydrolytic activity is provided for producing peroxycarboxylic acids from carboxylic acid esters and a source of peroxygen. More specifically, a Thermotoga maritima acetyl xylan esterase gene was modified using error-prone PCR and site-directed mutagenesis to create an enzyme catalyst characterized by an increase in the ratio of peracetic acid formation to peracetic acid hydrolysis specific activities (PAAF/PAAH ratio). The variant acetyl xylan esterase may be used to produce peroxycarboxylic acids suitable for use in a variety of applications such as cleaning, disinfecting, sanitizing, bleaching, wood pulp processing, and paper pulp processing applications.Type: ApplicationFiled: February 28, 2011Publication date: June 23, 2011Inventors: Robert Dicosimo, John Edward Gavagan, Mark S. Payne
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Publication number: 20110152370Abstract: An acetyl xylan esterase variant having perhydrolytic activity is provided for producing peroxycarboxylic acids from carboxylic acid esters and a source of peroxygen. More specifically, a Thermotoga maritima acetyl xylan esterase gene was modified using error-prone PCR and site-directed mutagenesis to create an enzyme catalyst characterized by an increase in the ratio of peracetic acid formation to peracetic acid hydrolysis specific activities (PAAF/PAAH ratio). The variant acetyl xylan esterase may be used to produce peroxycarboxylic acids suitable for use in a variety of applications such as cleaning, disinfecting, sanitizing, bleaching, wood pulp processing, and paper pulp processing applications.Type: ApplicationFiled: February 28, 2011Publication date: June 23, 2011Inventors: ROBERT DICOSIMO, John Edward Gavagan, Mark S. Payne
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Publication number: 20110152369Abstract: An acetyl xylan esterase variant having perhydrolytic activity is provided for producing peroxycarboxylic acids from carboxylic acid esters and a source of peroxygen. More specifically, a Thermotoga maritima acetyl xylan esterase gene was modified using error-prone PCR and site-directed mutagenesis to create an enzyme catalyst characterized by an increase in the ratio of peracetic acid formation to peracetic acid hydrolysis specific activities (PAAF/PAAH ratio). The variant acetyl xylan esterase may be used to produce peroxycarboxylic acids suitable for use in a variety of applications such as cleaning, disinfecting, sanitizing, bleaching, wood pulp processing, and paper pulp processing applications.Type: ApplicationFiled: February 28, 2011Publication date: June 23, 2011Inventors: ROBERT DICOSIMO, John Edward Gavagan, Mark S. Payne
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Publication number: 20110136908Abstract: An acetyl xylan esterase variant having perhydrolytic activity is provided for producing peroxycarboxylic acids from carboxylic acid esters and a source of peroxygen. More specifically, a Thermotoga maritime acetyl xylan esterase gene was modified using error-prone PCR and site-directed mutagenesis to create an enzyme catalyst characterized by an increase in the ratio of peracetic acid formation to peracetic acid hydrolysis specific activities (PAAF/PAAH ratio). The variant acetyl xylan esterase may be used to produce peroxycarboxylic acids suitable for use in a variety of applications such as cleaning, disinfecting, sanitizing, bleaching, wood pulp processing, and paper pulp processing applications.Type: ApplicationFiled: January 31, 2011Publication date: June 9, 2011Inventors: Robert DiCosimo, John Edward Gavagan, Mark S. Payne
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Publication number: 20110067831Abstract: 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-?-hydroxyacrylic acid, its salt or their mixture.Type: ApplicationFiled: May 25, 2009Publication date: March 24, 2011Applicant: SOLVAY (SOCIETE ANONYME)Inventor: Pierre Dournel
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Publication number: 20110000632Abstract: 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.Type: ApplicationFiled: December 16, 2008Publication date: January 6, 2011Inventors: Auke Gerardus Talma, Aaldert Johannes De Jong, Simon Bruijn, Jozef Johannes Maria Baltussen, Cornelis Elizabeth Johannus Van Lare, Marianne Frederika Reedijk
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Publication number: 20100282422Abstract: 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.Type: ApplicationFiled: December 25, 2008Publication date: November 11, 2010Inventors: Shoichi Miyawaki, Shiho Katsukawa, Hiroshi Abe, Yuko Iijima, Akira Isogai
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Publication number: 20100236734Abstract: 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.Type: ApplicationFiled: November 3, 2008Publication date: September 23, 2010Applicant: INNOSPEC LIMITEDInventors: Matthew Robert Giles, Nicholas John Dixon
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Publication number: 20100224333Abstract: The invention provides a composition of matter and a method, which enhance the process of mechanically pulping paper precursors. The composition of matter includes a small quantity of a reducing agent and a source of alkali. When added to the pulped material, e.g., wood chips, before or during mechanical pulping, the composition reduces the energy cost of the operation. In addition, not only does the composition also does not reduce the brightness of pulp, the composition can also enhance the effectiveness of subsequent bleaching processes.Type: ApplicationFiled: March 9, 2009Publication date: September 9, 2010Inventors: Prasad Duggirala, Sergey Shevchenko