Abstract: A D-tagatose spray-drying feed formulation is a mixture of D-tagatose and a functional excipient co-dissolved in a solvent to produce a excipient/D-tagatose composite having a glass transition temperature of greater than 30° C. A method of spray-drying D-tagatose includes the steps of (a) preparing the D-tagatose spray-drying formulation, (b) atomizing the D-tagatose spray-drying formulation in a drying chamber containing a hot inert processing gas and evaporating droplets to produce solid particles of excipient/D-tagatose composite and (c) separating and collecting the solid particles of excipient/D-tagatose composite from the processing gas.
Type:
Grant
Filed:
September 8, 2023
Date of Patent:
February 4, 2025
Assignee:
University of Kentucky Research Foundation
Abstract: Methods of preparing freeze dried powders comprising rebaudioside M and rebaudioside D are provided herein. The freeze dried powders produced by the disclosed methods exhibit improved aqueous solubility over known forms and compositions of rebaudioside M and rebaudioside D. Methods of preparing consumables, e.g. beverages, with the freeze dried compositions are also detailed herein.
Type:
Grant
Filed:
May 10, 2017
Date of Patent:
May 21, 2024
Assignee:
The Coca-Cola Company
Inventors:
Youlung Chen, Xiaoliang Tan, Indra Prakash, Josef Klucik, Gil Ma, Youngsuk Heo
Abstract: The present invention provides a method for forming caramels having reduced low molecular weight species such as 4-MeI. The low-4-MeI caramels produced by this method have improved stability and taste relative to those known in the art. The invention also extends to the caramels produced by the disclosed methods and the use of such caramels in food and beverages.
Type:
Grant
Filed:
January 22, 2020
Date of Patent:
May 14, 2024
Assignee:
The Coca-Cola Company
Inventors:
Josef Klucik, You Chen, Patricio Gutierrez
Abstract: An edible caramel color composition and method of making the same are disclosed. The method of making an edible caramel color composition includes the step of heating a reaction mixture to form a caramel color composition, wherein the reaction mixture contains: a carbohydrate, and a sulfite compound, in the absence of a caustic compound and in the absence of an ammonium compound.
Abstract: A process of making a caramel color comprising a) mixing a carbohydrate with an ammonia compound and a sulfite compound and at pH from just greater than about 4.0 to about 6.0; and b) heating of the mixture from step a) in a sealed vessel to a temperature of from about 120° C. to about 137° C. and maintaining a temperature in said range for at least about 2 hours, said time and temperature being sufficient to yield a product having a color level of at least about double strength and a level of 4-MeI of less than about 20 ppm, is provided. Also provided is a process of ramped heating which results in a similar caramel color product.
Abstract: A simple process for converting lignocellulosic biomass into fermentation products is disclosed. Biomass may be subjected to a steam or hot-water soak to dissolve hemicelluloses. This step is followed by mechanical refining, such as in a hot-blow refiner, of the cellulose-rich (and lignin-rich) solids. The refined solids are then enzymatically hydrolyzed to generate sugars. Certain embodiments provide a process for producing ethanol, comprising: digesting a cellulosic biomass feedstock with steam or hot water to produce cellulose-rich solids, hemicellulose oligomers, and lignin; conveying the digested stream through a blow-line refiner; separating a vapor from the refined stream; introducing the refined stream to an enzymatic hydrolysis unit to produce sugars; fermenting the sugars to produce ethanol in dilute solution; and concentrating the dilute solution to produce an ethanol product. Enzymes and microorganisms may be introduced at various points in the process.
Type:
Grant
Filed:
June 9, 2016
Date of Patent:
March 17, 2020
Assignees:
GranBio Intellectual Property Holdings, Valmet AB
Abstract: A process for producing thermally inhibited starch is described resulting in a viscostable starch product. The process comprises providing an alkaline starch having a pH, when measured in a 20% (w/v) aqueous dispersion, between 9.1 and 11.2, adjusting the water content of the starch to between 2 and 22 wt. %, heating the starch between 130 and 190° C., especially between 140 and 180° C., for a sufficient time and at a sufficient pressure for the inhibition of the starch to be initiated before the water content has reached a level of 1 wt. % and before the pH has reached a value of 9, continuing heating the starch between 140 and 190° C. until viscostability is achieved, and cooling and optionally further processing the starch.
Type:
Grant
Filed:
September 16, 2013
Date of Patent:
June 11, 2019
Assignee:
N.V. NEDERLANDSCH OCTROOIBUREAU
Inventors:
Maurice Karel Hubertina Essers, Johannes Wilhelmus Timmermans, Jan Matthijs Jetten, Theodoor Maximiliaan Slaghek, Alida Anna Catharina Maria Oudhuis, Ricardo Nagtegaal
Abstract: The embodiments herein relate to a composition of real fruit drink concentrate, a method of making the real fruit drink concentrate and a method of making hot as well as cold real fruit drinks. The real fruit drink concentrate comprises a plurality of fruits, spices, herbs, flowers, lemon juice, sugar and water. The method of preparing a real fruit drink concentrate comprises preparing a mixture. The mixture is prepared by mixing fresh or frozen fruit pieces, spices, sugar, lemon juice and a quantity sufficient water in a container. The mixture is cooked in a pre-heated oven at 420° F. till the caramelization of fruits and sugar occurs. A boiling water is added to the mixture and cooked again. The total cooking time is 45 minutes and the boiling water is added after at least ?rd of the total cooking time. The mixture is canned. The canning is done by using a boiling water bath for 5-10 minutes. The mixture is stored in sealed jars in a cool dark place.
Abstract: Class IV caramel color with reduced 4-MeI content is formed by combining carbohydrate with ammonium bisulfite and acid in an amount effective to establish a pH of less than 5. This is heated in a closed reactor vessel and heated to a temperature and for a time effective to provide the desired intensity caramel color. A base is injected into the closed reaction vessel during heating to control the caramelization reaction.
Abstract: Biomass (e.g., plant biomass, animal biomass, and municipal waste biomass) is processed to produce useful products, such as fuels. For example, systems can use feedstock materials, such as cellulosic and/or lignocellulosic materials and/or starchy or sugary materials, to produce ethanol and/or butanol, e.g., by fermentation.
Abstract: The invention provides methods and compositions for the removal of lignin from water suspensions originating from lignocellulosic feedstocks. The method involves adding coagulants and flocculants to the suspension. While hydrolysis does remove some lignin, the pitch in many feedstocks prevents the hydrolysis from coming into contact with all of the lignin or so effectively blocks it that the lignin can re-condense. This is especially the case with low lignin grass based lignocellulosic feedstock. But with the addition of the inventive coagulants and flocculants, a phase separation substantially accelerates and lignin forms flocs that forms that physically separates the lignin from the pitch and the cellulose thereby makes removal the lignin from aqueous suspensions by decanting and filtration effective and easy.
Type:
Grant
Filed:
March 10, 2013
Date of Patent:
March 31, 2015
Assignee:
Ecolab USA Inc.
Inventors:
Sergey M. Shevchenko, Jane B. Wong Shing, Olivier Clot
Abstract: this invention is directed to a process for treating biomass. The biomass is treated with a biomass swelling agent within the vessel to swell or rupture at least a portion of the biomass. A portion of the swelling agent is removed from a first end of the vessel following the treatment. Then steam is introduced into a second end of the vessel different from the first end to further remove swelling agent from the vessel in such a manner that the swelling agent exits the vessel at a relatively low water content.
Abstract: There is described a method of isolating one or more of pectin, d-limonene, a flavour compound, a flavonoid, a soluble monosaccharide, a decomposition product of a monosaccharide and cellulose, from citrus material wherein said method comprises the microwave assisted hydrothermal low temperature treatment of citrus material.
Type:
Application
Filed:
April 4, 2013
Publication date:
March 5, 2015
Inventors:
James Hanley Clark, Lucie Anne Pfaltzgraff, Vitaliy Lvovich Budarin, Mario De Bruyn
Abstract: The present invention provides methods for the fabrication CNT dispersions using polysaccharides, especially hemicelluloses, and most advantageously xylan. The present invention also provides methods to isolate, and purify hemicelluloses from plant materials. The present invention provides methods and compositions for the coating of solid surfaces using CNT dispersions. One currently preferred method coating of a surface is electrospraying the CNT dispersion. The present invention provides electrically conducting materials that can replace conducting plastics, graphite, and even some metals as electrical conductors. In one embodiment the present materials can be used as stealth coatings. In another embodiment the present materials can provide shield against high frequency electromagnetic radiation, while being permeable to low frequency magnetic field.
Abstract: A catalyst for cellulose hydrolysis and/or the reduction of hydrolysis products, in which a transition metal of group 8 to 11 is supported on a solid support. A method of producing sugar alcohols comprising: hydrolyzing cellulose in the presence of the catalyst in a hydrogen-containing atmosphere with pressurization; and reducing the hydrolysis product of cellulose. Provided are a catalyst for use in the production of sugar alcohols by the hydrolysis and hydrogenation of cellulose that affords easy separation of catalyst and product, and that does not require pH adjustment, acid or alkali neutralization, or activation of the catalyst during reuse, and a method of producing sugar alcohols from cellulose employing this catalyst.
Type:
Grant
Filed:
March 1, 2007
Date of Patent:
February 3, 2015
Assignee:
National University Corporation Hokkaido University
Abstract: A method of digesting lignocellulosic material includes the steps of providing the lignocellulosic material and a caustic composition having a pH of at least about 10. The caustic composition includes water, an alkaline- or alkaline earth-metal hydroxide, and up to about 1 percent by weight based on a total weight of the composition of a branched digestion additive. The branched digestion additive has the structure: wherein A is at least one alkyleneoxy group and each alkyleneoxy group has from 2 to 4 carbon atoms, n is 0 or 1, B is a branched aliphatic hydrocarbon group having from 8 to 15 carbon atoms, X is H or B-0-(A)m, and each m is independently an average value from 3 to 30, and wherein the caustic composition has a Draves Wetting Time of less than 100 seconds as determined using ASTM D2281.
Type:
Application
Filed:
February 8, 2013
Publication date:
January 8, 2015
Inventors:
David Durocher, Thomas C. Friel, Kenneth L. Zack
Abstract: Embodiments of the present invention overcome the well-known recalcitrance of lignocellulosic biomass in an economically viable manner. A process and a system are provided for the efficient fractionation of lignocellulosic biomass into cellulose, hemicellulose, and lignin. The cellulose and hemicellulose thus obtained are highly amorphous and can be readily converted into highly concentrated mixtures of five and six carbon sugars using known methods. Typical yields of sugars exceed 100 grams of sugars per liter of sugar solution. Other products, such as alcohols, can easily be prepared according to methods of the invention. The modest process conditions and low solvent/solid ratios of some embodiments of the invention require relatively low capital and processing costs.
Type:
Grant
Filed:
April 22, 2013
Date of Patent:
December 2, 2014
Assignee:
Virginia Tech Intellectual Properties, Inc.
Abstract: A method is disclosed for recovering saccharide monomers and/or oligomers from a reaction mixture. The reaction mixture may further comprise water and a molten salt hydrate. The method may comprise adding an anti-solvent, whereby at least the saccharide oligomers are precipitated from the reaction mixture. In an alternate embodiment molten salt hydrate is extracted from the reaction mixture using a suitable extractant.
Type:
Application
Filed:
July 24, 2014
Publication date:
November 13, 2014
Inventors:
Roman TSCHENTSCHER, Rafael MENEGASSI DE ALMEIDA, José Rafael Hernández CARUCCI, Johan VAN DEN BERGH, Jacob Adriaan MOULIJN
Abstract: A process for pretreating a solid, cellulose-containing biomass material which pretreatment comprises contacting the solid biomass material with an Ionic Liquid medium under sub-solvating conditions. The pretreatment results in an opening up of the texture of the solid biomass material, while no or a limited amount of biomass material is dissolved. The Ionic Liquid medium preferably is an inorganic molten salt hydrate. The pretreated biomass material can be as a feedstock in any process that benefits from the change in texture resulting from the pretreatment.
Abstract: A method is provided for improving enzymatic hydrolysis in saccharification of a lignocellulosic material. The method is comprising pretreating the lignocellulosic material to obtain a slurry of pretreated lignocellulosic material; adding at least one reducing agent to the slurry of pretreated lignocellulosic material or the liquid fraction thereof to decrease the enzymatic hydrolysis inhibitory properties of slurry of the pretreated lignocellulosic material or the liquid fraction thereof; and subjecting the slurry of pretreated lignocellulosic material or the liquid fraction thereof to enzymatic hydrolysis in the presence of the at least one reducing agent.
Abstract: The present invention provides for novel compositions and methods for recycling or recovering ionic liquid used in IL pretreated cellulose and/or lignocellulosic biomass (LBM).
Type:
Application
Filed:
June 24, 2014
Publication date:
October 23, 2014
Applicants:
SANDIA CORPORATION, THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
Inventors:
Dean C. Dibble, Aurelia Cheng, Anthe George
Abstract: The present invention is directed to a process comprising: (i) extracting ?50% by weight of all carrageenan from a carrageenan-containing seaweed material to obtain a cellulose-containing seaweed residue; and (ii) purifying the cellulose-containing seaweed residue by at least one of hydrolysis or bleaching. The present invention is also directed to the cellulose obtained from the process, as well as products containing the cellulose-containing seaweed material.
Type:
Application
Filed:
August 31, 2012
Publication date:
October 9, 2014
Applicant:
FMC CORPORATION
Inventors:
Zheng Tan, Michael Sestrick, William Matakas, Aaron Chip Venables
Abstract: Methods of producing bio-fuel and other high-value products from oleaginous biomass (e.g. algae biomass) are provided. The two-step methods use a first step of subcritical water extraction of the biomass at low temperatures to produce polysaccharides and other high value products of interest, followed by, ii) hydrothermal liquefaction of remaining solid biomass at high temperatures to produce bio-oil.
Abstract: The invention provides methods and compositions for the removal of lignin from water suspensions originating from lignocellulosic feedstocks. The method involves adding coagulants and flocculants to the suspension. While hydrolysis does remove some lignin, the pitch in many feedstocks prevents the hydrolysis from coming into contact with all of the lignin or so effectively blocks it that the lignin can re-condense. This is especially the case with low lignin grass based lignocellulosic feedstock. But wWith the addition of the inventive coagulants and flocculants, a phase separation substantially accelerates and lignin forms flocs that forms that physically separates the lignin from the pitch and the cellulose thereby makes removal the lignin from aqueous suspensions by decanting and filtration effective and easy.
Type:
Application
Filed:
March 10, 2013
Publication date:
September 11, 2014
Applicant:
Ecolab USA Inc.
Inventors:
Sergey M. Shevchenko, Jane B. Wong Shing, Olivier Clot
Abstract: Embodiments of the present invention overcome the well-known recalcitrance of lignocellulosic biomass in an economically viable manner. A process and system are provided for the efficient fractionation of lignocellulosic biomass into cellulose, hemicellulose sugars, lignin, and acetic acid. The cellulose thus obtained is highly amorphous and can be readily converted into glucose using known methods. Fermentable hemicellulose sugars, low-molecular-weight lignin, and purified acetic acid are also major products of the process and system. The modest process conditions and low solvent/solid ratios of some embodiments of the invention imply relatively low capital and processing costs.
Type:
Grant
Filed:
March 29, 2006
Date of Patent:
July 22, 2014
Assignee:
Virginia Tech Intellectual Properties, Inc.
Abstract: A process for the treatment of biomass to render structural carbohydrates more accessible and/or digestible using concentrated ammonium hydroxide with or without anhydrous ammonia addition, is described. The process preferably uses steam to strip ammonia from the biomass for recycling. The process yields of monosaccharides from the structural carbohydrates are good, particularly as measured by the enzymatic hydrolysis of the structural carbohydrates. The monosaccharides are used as animal feeds and energy sources for ethanol production.
Type:
Grant
Filed:
August 21, 2012
Date of Patent:
July 8, 2014
Assignee:
Board of Trustees of Michigan State University
Abstract: The process is for pretreating a lignocellulosic biomass feedstock and comprises: soaking a lignocellulosic biomass feedstock wherein the soaked biomass is present as a mixture with a free liquid and wherein the free liquid comprises at least one dissolved compound selected from the group consisting of glucose, xylose and respective oligomers thereof, washing the mixture of the soaked biomass and the free liquid, wherein at least a portion of the free liquid containing at least one dissolved compound selected from the group consisting of glucose, xylose and respective oligomers thereof is separated from the soaked biomass to create a soaked washed biomass and at least one free liquid stream, compressing the soaked biomass to create a released liquid, separating the released liquid from the soaked biomass, and keeping at least a portion of the released liquid separate from any free liquid.
Type:
Grant
Filed:
September 29, 2011
Date of Patent:
July 8, 2014
Assignee:
Beta Renewables, S.p.A.
Inventors:
Piero Ottonello, Simone Ferrero, Paolo Torre, Francesco Cherchi, Danilo Defaveri
Abstract: The present invention generally provides methods of improving lignin separation during biomass fractionation with an acid to release sugars and a solvent for lignin (such as ethanol). In some embodiments, a digestor is employed to fractionating a feedstock in the presence of a solvent for lignin, sulfur dioxide, and water, to produce a liquor containing hemicellulose, cellulose-rich solids, and lignin. A solid additive is added to the digestor, wherein the solid additive combines with at least a portion of the lignin. Then a mixture of lignin and the solid additive is separated from the liquor, prior to hemicellulose recovery. Optionally, a solid additive may also be introduced to a hydrolysis reactor for converting hemicellulose oligomers to monomers, to improve separation of acid-catalyzed lignin. In some embodiments, the solid additive is gypsum or a gypsum/lignin mixture.
Type:
Application
Filed:
October 29, 2013
Publication date:
June 12, 2014
Applicant:
API Intellectual Property Holdings, LLC
Inventors:
Theodora RETSINA, Vesa PYLKKANEN, Kimberly NELSON, Mark SZCZEPANIK
Abstract: The present invention relates to the use of a comparatively cheap material for the containment of at least a strongly acidic mineral acid solution highly diluted with water, by means of which saccharides are extracted from lignocellulose material by hydrolysis at a temperature of 175-240° C. and a pressure of 6-34 bar (0.6-14 MPa) as well as a time of 1-60 minutes and is characterized in that the material comprises, in addition to iron in an amount greater than any other individual substance and usually at least 50% by weight, at least chromium in an amount of 10.5-30% by weight, nickel in an amount of 2.5-29% by weight, and molybdenum in an amount of 0-7% by weight. The invention also relates to an apparatus.
Type:
Grant
Filed:
March 6, 2008
Date of Patent:
May 20, 2014
Assignee:
Sekab E-Technology AB
Inventors:
Torbjörn Van Der Meulen, Gunnar Fransson, Lars Sundlöf, Jan Lindstedt
Abstract: This invention relates to a lignin sorbent, a lignin removal unit, a biorefinery, a process for removing lignin, a process for binding lignin, and a renewable material. The lignin sorbent includes a substrate, and a lignin binding material dispersed with respect to the substrate. The lignin binding process includes the step of adding a lignin binding material to an input stream, and the step of converting the input stream into a renewable material.
Abstract: A method for the hydrolysis of cellulosic materials using spent liquor. The spent liquor is derived from a pulping operation or is hydrolyzate from another cellulosic biomass process. The process can be implemented in a batch or semi continuous or continuous process. The hydrolyzate is fermented to a useful product and purified. Combustible biomass residues and chemicals are used to provide energy and chemical recovery.
Abstract: Embodiments of the present invention overcome the well-known recalcitrance of lignocellulosic biomass in an economically viable manner. A process and a system are provided for the efficient fractionation of lignocellulosic biomass into cellulose, hemicellulose, and lignin. The cellulose and hemicellulose thus obtained are highly amorphous and can be readily converted into highly concentrated mixtures of five and six carbon sugars using known methods. Typical yields of sugars exceed 100 grams of sugars per liter of sugar solution. Other products, such as alcohols, can easily be prepared according to methods of the invention. The modest process conditions and low solvent/solid ratios of some embodiments of the invention require relatively low capital and processing costs.
Type:
Grant
Filed:
March 16, 2009
Date of Patent:
March 4, 2014
Assignee:
Virginia Tech Intellectual Properties, Inc.
Abstract: A solution of a polysaccharide material, a method of producing such solutions and uses thereof. The solution is formed by the polysaccharide in a solvent which comprises an efficient amount of an active compound selected from the group of diketo compounds, such as glyoxylic acid and salts and derivatives thereof, capable of reacting with the polysaccharide. The solution thus produced can be used as a viscous dope, and for the production of fibers, films and surface coatings and for gluing.
Abstract: The present invention relates to methods and systems for remediating one or more impurities (e.g., diacetyl) that are present in manufacturing an alcohol (e.g., ethanol) from cellulosic biomass. The methods and systems include reacting the one or more impurities with at least one treatment compound (e.g., an oxidizing agent, an alkali compound, or a mixture thereof) to form a reaction product that can be separated from the alcohol.
Type:
Application
Filed:
June 13, 2013
Publication date:
December 19, 2013
Inventors:
David Charles Carlson, Blake J. Gomer, Casey C. Jenks, Sharil Kirschman-Rollag, Kristine Nicole Plack, Melissa R. Reis
Abstract: The present invention concerns a process for the mechanical or mechano-chemical treatment of biomass, wherein a mixture containing the biomass and optional further chemicals is pressed through the openings of one or more compactor one or more times. The process can be operated in a continuous manner by using more than one compactor and more than one compacting cycle, whereby the multiple compactors are operated sequentially.
Type:
Application
Filed:
February 23, 2012
Publication date:
December 12, 2013
Applicant:
TEKNOLOGIAN TUTKIMUSKESKUS VTT
Inventors:
Kirsi Immonen, Eino Sivonen, Kyosti Valta, Anne Kallioinen, Matti Siika-Aho
Abstract: A material which is suitable as filler or coating pigment for a fibrous web and a method for manufacturing thereof. According to the method, a feed comprising organic polymer material is cooled to at least approximately ?50° C., after which it is refined in a jet refiner to a desired particle size. The present invention generates uniform pigment particles which comprise, for instance, starch esters, and which particles have a porous surface structure, in which case they are suitable for instance as coating pigments and fillers for offset and ink-jet papers.
Type:
Grant
Filed:
August 17, 2006
Date of Patent:
December 3, 2013
Assignee:
Valtion Teknillinen Tutkimuskeskus
Inventors:
Hannu Mikkonen, Mauno Miettinen, Kirsi Kataja, Saija Luukkanen, Soili Peltonen, Pia Qvintus-Leino
Abstract: This invention is intended to improve saccharification efficiency by allowing cellulose and/or hemicellulose to relax sufficiently with an ionic liquid. Cellulose and/or hemicellulose is allowed to relax sufficiently with an ionic liquid through a step of soaking cellulosic biomass in a solution containing an ionic liquid and an alkali.
Abstract: The present invention provides a process for the purification and concentration of a partially water-soluble organic product from a source containing the same at concentration C0, which process comprises the steps of: (i) concentrating said product by means of a resin to form a first aqueous solution at concentration of C1; and (ii) fractionating an aqueous solution by temperature adjustment to form a second aqueous solution and a third aqueous solution with concentrations C2 and C3, respectively, wherein C2>C3 and C2>C1>C0.
Abstract: The present invention describes a fungal modified chitosan adhesive for binding a fibrous material and the method of producing the adhesive. The adhesive is produced by providing a chitosan containing raw material; a fungal growing medium; a fungal culture; mixing the raw material, the growing medium and the fungal culture together to produce a suspension; incubating the suspension to produce a broth comprising a modified chitosan solid, an at least partially-consumed medium liquid and a fungal residue; separating the modified chitosan solid from the liquid and the fungal residue, and dissolving the modified chitosan solid to produce the adhesive resin.
Abstract: Provided are methods and compositions for high yields while using reduced enzyme loads in saccharification and fermentation processes. These methods increase the efficiency of enzymes and result in improved yields and composition of saccharification and fermentation end products.
Abstract: A process for the conversion of sugars and/or other biomass to produce hydrocarbons, hydrogen, and/or other related compounds is described. In one aspect, the process includes fermenting biomass to produce one or more organic intermediates, for example, a carboxylic acid, and optionally, hydrogen. The carboxylic acids may then be decarboxylated to produce carbon dioxide and one or more hydrocarbon compounds. Also described are steps to further react the hydrocarbon compounds to form polymers, hydrocarbon compounds having at least 4 carbon atoms, or the like.
Abstract: The present invention generally relates to processes for production of ethanol from cellulosic biomass. The present invention also relates to production of various co-products of preparation of ethanol from cellulosic biomass. The present invention further relates to improvements in one or more aspects of preparation of ethanol from cellulosic biomass including, for example, improved methods for cleaning biomass feedstocks, improved acid impregnation, and improved steam treatment, or “steam explosion.
Type:
Grant
Filed:
September 19, 2011
Date of Patent:
October 1, 2013
Assignee:
Abengoa Bioenergy New Technologies, Inc.
Abstract: A method is provided for improving enzymatic hydrolysis in saccharification of a lignocellulosic material. The method is comprising pretreating the lignocellulosic material to obtain a slurry of pretreated lignocellulosic material; adding at least one reducing agent to the slurry of pretreated lignocellulosic material or the liquid fraction thereof to decrease the enzymatic hydrolysis inhibitory properties of slurry of the pretreated lignocellulosic material or the liquid fraction thereof; and subjecting the slurry of pretreated lignocellulosic material or the liquid fraction thereof to enzymatic hydrolysis in the presence of the at least one reducing agent.
Abstract: The process is for pretreating a lignocellulosic biomass feedstock and comprises: soaking a lignocellulosic biomass feedstock wherein the soaked biomass is present as a mixture with a free liquid and wherein the free liquid comprises at least one dissolved compound selected from the group consisting of glucose, xylose and respective oligomers thereof, washing the mixture of the soaked biomass and the free liquid, wherein at least a portion of the free liquid containing at least one dissolved compound selected from the group consisting of glucose, xylose and respective oligomers thereof is separated from the soaked biomass to create a soaked washed biomass and at least one free liquid stream, compressing the soaked biomass to create a released liquid, separating the released liquid from the soaked biomass, and keeping at least a portion of the released liquid separate from any free liquid.
Type:
Application
Filed:
September 29, 2011
Publication date:
June 13, 2013
Applicant:
BETA RENEWABLES, S.P.A.
Inventors:
Piero Ottonello, Simone Ferrero, Paolo Torre, Francesco Cherchi, Danilo Defaveri
Abstract: The present invention relates to a process for the conversion of a lignocellulosic feedstock involving acid pretreatment. The process comprises the steps of treating the lignocellulosic feedstock with alkali at a pH of between about 8.0 and about 12.0 so as to dissolve acetyl groups present on said lignocellulosic feedstock, while converting less than about 10% of the xylan present in the lignocellulosic feedstock to xylose and less than about 10% of the cellulose to glucose, thereby producing an alkali conditioned feedstock. The alkali conditioned feedstock is then pretreated at a temperature of about 160° C. to about 250° C., at a pH of about 0.5 to about 2.5 for about 0.5 to about 10 minutes so as to hydrolyze about 80 to 100% of the xylan and about 3 to about 15% of the cellulose to produce an acid pretreated feedstock comprising cellulose. The cellulose in the pretreated feedstock can be hydrolyzed to glucose with cellulase and the glucose can be fermented to produce a fermentation product.
Type:
Application
Filed:
August 11, 2011
Publication date:
June 6, 2013
Applicant:
IOGEN ENERGY CORPORATION
Inventors:
Jeffrey S. Tolan, Steven Cardile, Daphne Wahnon
Abstract: The disclosure provides a method for liquefying biomass, including: (a) mixing a solid organic ammonium salt containing single nitrogen with at least one organic compound which is capable of forming a hydrogen bond with the solid organic ammonium salt to form a first mixture; (b) heating the first mixture until the first mixture becomes a solution; (c) mixing a biomass and an acid catalyst with the solution to form a second mixture; and (d) heating the second mixture to make the biomass therein convert into a liquefied product.