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508results about "Pulp by-products recovery" patented technology
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Process for the production of biofuel from plant materials
InactiveUS20070259412A1Rapid productionEfficient and cost-effective useBiofuelsLignin derivativesCelluloseBiofuel
An integrated process for the production of ethanol from woody plant material is provided, the process comprising: contacting a continuous flow of the plant material with a counter-current continuous flow of an aqueous ethanol solution at elevated temperature and pressure to provide plant material depleted of lignin; removing ethanol from the lignin-depleted plant material; contacting a continuous flow of the lignin-depleted plant material with water at elevated temperature and pressure to solubilize xylose within the plant material; and hydrolyzing cellulose present in the plant material to form glucose, which in turn is fermented to produce ethanol.
Owner:VERTICHEM CORP
Lignin and other products isolated from plant material, methods for isolation and use, and compositions containing lignin and other plant-derived products
InactiveUS20090062516A1Good for healthImprove responseSugar derivativesOrganic compound preparationFiberElastomer
Lignin polymers having distinctive properties, including a generally high molecular weight and generally homogeneous size distribution, as well as preservation of native reactive side groups, are isolated by solvent extraction of plant materials. Methods for isolation of lignin polymers, and for use of the isolated lignin polymers are disclosed. Compositions containing lignin isolated from plant materials, such as carbon fiber composites, resins, adhesive binders and coatings, polyurethane-based foams, rubbers and elastomers, plastics, films, paints, nutritional supplements, food and beverage additives are disclosed. Xylose and xylose derivatives, furfural, fermentable sugars, cellulose and hemi-cellulose products may be used directly or further processed. The lignin polymers and other plant-derived products disclosed herein may be produced in abundance at low cost, and may be used as substitutes for feedstocks originating from fossil fuel or petrochemical sources in the manufacture of various products.
Owner:VERTICHEM CORP
Separation of reactive cellulose from lignocellulosic biomass with high lignin content
InactiveUS20100269990A1Reduce inhibitionReduce extractionCellulosic pulp after-treatmentBiofuelsFiberLignocellulosic biomass
A process for separating the components of lignocellulosic biomass for the purpose of producing a pure reactive cellulose is disclosed. The process has two stages. In the first stage, the lignocellulosic biomass is pretreated with steam, with or without an acid catalyst, and then pressed, with or without the presence of an eluent, to remove hemicellulose and other impurities. In the second stage, the pretreated biomass is extracted with a solvent such as ethanol with or without acid catalysts in order to remove lignin and release a purified cellulose stream. The extracted cellulose is then rapidly decompressed to rupture the fibrous structure. The process provides a purified cellulose stream that is relatively easy to hydrolyze with enzymes and ferment to biofuels and other chemicals such as ethanol.
Owner:GREENFIELD SPECIALTY ALCOHOLS
Lignin and other products isolated from plant material, methods for isolation and use, and compositions containing lignin and other plant-derived products
InactiveUS20090069550A1Great potentialTotal calories lowLignin derivativesPulp by-products recoveryFiberElastomer
Lignin polymers having distinctive properties, including a generally high molecular weight and generally homogeneous size distribution, as well as preservation of native reactive side groups, are isolated by solvent extraction of plant materials. Methods for isolation of lignin polymers, and for use of the isolated lignin polymers are disclosed. Compositions containing lignin isolated from plant materials, such as carbon fiber composites, resins, adhesive binders and coatings, polyurethane-based foams, rubbers and elastomers, plastics, films, paints, nutritional supplements, food and beverage additives are disclosed. Xylose and xylose derivatives, furfural, fermentable sugars, cellulose and hemi-cellulose products may be used directly or further processed. The lignin polymers and other plant-derived products disclosed herein may be produced in abundance at low cost, and may be used as substitutes for feedstocks originating from fossil fuel or petrochemical sources in the manufacture of various products.
Owner:VERTICHEM CORP
Product and processes from an integrated forest biorefinery
ActiveUS20070079944A1Easy to optimizePretreatment with water/steamPulping with acid salts/anhydridesPulp and paper industrySugar
An omnibus process of pulping and bleaching lignocellulosic materials in which a charge of a lignocellulosic material is biopulped and / or water extracted prior to pulping and bleaching. The lignocellulosic material may be mechanically pulped and bleached in the presence of an enzyme that breaks lignin-carbohydrate complexes. The aqueous extract in embodiments including a water extract step is separated into acetic acid and hemicellulose sugar aqueous solutions.
Owner:THE RES FOUND OF STATE UNIV OF NEW YORK
Integrated processing of plant biomass
InactiveUS7649086B2Rapid productionEfficient and cost-effective useBiofuelsLignin derivativesCelluloseWoody plant
An integrated process for the production of ethanol from woody plant material is provided, the process comprising: contacting a continuous flow of the plant material with a counter-current continuous flow of an aqueous ethanol solution at elevated temperature and pressure to provide plant material depleted of lignin; removing ethanol from the lignin-depleted plant material; contacting a continuous flow of the lignin-depleted plant material with water at elevated temperature and pressure to solubilize xylose within the plant material; and hydrolyzing cellulose present in the plant material to form glucose, which in turn is fermented to produce ethanol.
Owner:VERTICHEM CORP
Biomass Pretreatment
A method is provided for producing an improved pretreated biomass product for use in saccharification followed by fermentation to produce a target chemical that includes removal of saccharification and or fermentation inhibitors from the pretreated biomass product. Specifically, the pretreated biomass product derived from using the present method has fewer inhibitors of saccharification and / or fermentation without a loss in sugar content.
Owner:SUSTAINABLE TECH CORP +2
Process for recovering lignin
ActiveUS20110294991A1Low costReduce and eliminate odorLignin derivativesPulp by-products recoveryChemistryCarbon dioxide
There is provided a process for recovery of lignin from a black liquor that contains either soluble or dispersed lignin, generating a “liquid lignin” at high yield. Soluble lignin at elevated pH is precipitated by reducing the pH of the black liquor stream by countercurrent reaction with carbon dioxide, at elevated temperature and pressure, creating two bulk fluid phases: a heavy lignin-rich phase and a light lignin-depleted phase. The heavy lignin-rich phase is separated and washed countercurrently with a strong acid to displace metal cations from the lignin, creating a low-salt lignin, which is then formed into a low-dust high-bulk-density lignin fuel pellet. If needed, especially for lignin recovered from kraft papermaking black-liquor streams, an oxidation step is included to eliminate negative odor for high-value green-chemistry applications.
Owner:LIQUID LIGNIN
Method of continuous processing of lignocellulosic feedstock
InactiveUS7754457B2Quantity minimizationEasier to dispense evenlyPretreatment with water/steamSugar derivativesCelluloseChemistry
Owner:IOGEN ENERGY CORP
Methods and systems for processing lignin during hydrothermal digestion of cellulosic biomass solids
InactiveUS20140117275A1Low viscosityCellulosic pulp after-treatmentOther chemical processesCelluloseFluid phase
Digestion of cellulosic biomass solids may be complicated by lignin release therefrom, which can produce a highly viscous phenolics liquid phase comprising lignin polymer. Methods for digesting cellulosic biomass solids may comprise: providing cellulosic biomass solids in the presence of a digestion solvent, molecular hydrogen, and a slurry catalyst capable of activating molecular hydrogen; at least partially converting the cellulosic biomass solids into a phenolics liquid phase comprising lignin, an aqueous phase comprising an alcoholic component derived from the cellulosic biomass solids, and an optional light organics phase; wherein at least a portion of the slurry catalyst accumulates in the phenolics liquid phase as it forms; and reducing the viscosity of the phenolics liquid phase.
Owner:SHELL OIL CO
Process for the stepwise treatment of lignocellulosic material to produce reactive chemical feedstocks
InactiveUS20110003352A1Using liquid separation agentCalcium/strontium/barium sulfatesSulfonateLignosulfonates
A method for the fractionation of lignocellulosic materials into reactive chemical feedstock in a batch or semi continuous process by the stepwise treatment with aqueous aliphatic alcohols in the presence of sulfur dioxide or acid. Lignocellulosic material is fractionated in a fashion that cellulose is removed as pulp, or converted to esterified cellulose, cooking chemicals are reused, lignin is separated in the forms of reactive native lignin and reactive lignosulfonates and hemicelluloses are converted into fermentable sugars, while fermentation inhibitors are removed. In an integrated vapor compression stripper and evaporator system, aliphatic alcohol is removed from a liquid stream and the resulting stream is concentrated for further processing.
Owner:API INTELLECTUAL PROPERTY HOLDINGS LLC +1
Detoxifying and Recylcing of Washing Solution Used In Pretreatment Of Lignocellulose-Containing Materials
ActiveUS20090056889A1Improve hydrolysis efficiencyImprove filtering effectWashing/displacing pulp-treating liquorsBiofuelsPre treatmentOrganic chemistry
The invention relates to a process of detoxifying pretreated lignocellulose-containing material comprising washing the pretreated lignocellulose-containing material in a washing solution and treating the used washing solution to remove an enzyme inhibitor and / or an inhibitor of a fermenting organism before recycling the used washing solution.
Owner:COFCO GROUP
Method for the production of fermentable sugars and cellulose from lignocellulosic material
InactiveUS20070254348A1Pulping with acid salts/anhydridesPulp by-products recoveryOrganic acidAlcohol
A method for the production of fermentable sugars and cellulose from lignocellulosic material in a batch or continuous process. Lignocellulosic material is fractionated in a fashion that cellulose is removed as pulp, cooking chemicals reused, lignin is separated for the production of process energy, hemicelluloses are converted into fermentable sugars, while fermentation inhibitors are removed. High yield production of alcohols or organic acids can be obtained from this method using the final reaction step.
Owner:RETABINA THEODORA +1
Processes and apparatus for producing nanocellulose, and compositions and products produced therefrom
Processes disclosed are capable of converting biomass into high-crystallinity nanocellulose with surprisingly low mechanical energy input. In some variations, the process includes fractionating biomass with an acid (such as sulfur dioxide), a solvent (such as ethanol), and water, to generate cellulose-rich solids and a liquid containing hemicellulose and lignin; and mechanically treating the cellulose-rich solids to form nanofibrils and / or nanocrystals. The total mechanical energy may be less than 500 kilowatt-hours per ton. The crystallinity of the nanocellulose material may be 80% or higher, translating into good reinforcing properties for composites. The nanocellulose material may include nanofibrillated cellulose, nanocrystalline cellulose, or both. In some embodiments, the nanocellulose material is hydrophobic via deposition of some lignin onto the cellulose surface. Optionally, sugars derived from amorphous cellulose and hemicellulose may be separately fermented, such as to monomers for various polymers. These polymers may be combined with the nanocellulose to form completely renewable composites.
Owner:GRANBIO INTELLECTUAL PROPERTY HOLDINGS LLC
System and process for biomass treatment
InactiveUS20070029252A1Solid waste disposalBiochemistry apparatusDry weightEnvironmental engineering
A system including an apparatus is presented for treatment of biomass that allows successful biomass treatment at a high solids dry weight of biomass in the biomass mixture. The design of the system provides extensive distribution of a reactant by spreading the reactant over the biomass as the reactant is introduced through an injection lance, while the biomass is rotated using baffles. The apparatus system to provide extensive assimilation of the reactant into biomass using baffles to lift and drop the biomass, as well as attrition media which fall onto the biomass, to enhance the treatment process.
Owner:EI DU PONT DE NEMOURS & CO +1
Method for separating lignin from black liquor, a lignin product, and use of a lignin product for the production of fuels or materials
ActiveUS20100325947A1Control balanceLower requirementSolid fuelsPulp by-products recoveryChemistryRecovery boiler
The method is for controlling a sodium and sulphur balance of a pulp mill while separating lignin from black liquor. Lignin is precipitated by using an acid followed by filtration. The lignin filter cake thus obtained is re-suspended in acidic liquid and dewatered to form a second cake. The filtrate obtained after dewatering of the second cake is returned for washing and suspension of the first cake. Sodium sulphate-rich ESP (electrostatic precipitator) dust produced in the recovery boiler is used in the washing of the precipitated lignin cake.
Owner:VALMET AB
Method
ActiveUS20080214796A1Lower requirementInhibition of dissolutionLignin derivativesPulp by-products recoveryBlack liquorPulp mill
A method for controlling the sodium and sulphur balance of a pulp mill while separating lignin from black liquor, and also a lignin product or an intermediate lignin product obtainable by the method. The present invention also provides use of a lignin product or an intermediate lignin product for the production of fuel (solid, gaseous or liquid) or materials.
Owner:LIGNOBOOST
Method for separating lignin from black liquor
ActiveUS20110297340A1Improve filtration rateIncrease contentLignin derivativesPulp by-products recoveryChemistryChemical composition
A method was developed for: a) improving the filterability of acid-precipitated lignin from kraft black liquors, b) increasing the dry solids content of the final lignin product, c) reducing the acid requirements and d) minimizing or eliminating TRS emissions during the acidification of black liquor to produce lignin and / or the subsequent suspension of the lignin in acid and / or the washing of the lignin with acid. No major difference in the chemical composition, MWD and main functional groups was found in the lignin of the present invention compared with lignins produced by conventional methods.
Owner:FPINNOVATIONS INC
Method For Separating Lignin From A Lignin Containing Liquid/Slurry
InactiveUS20080051566A1Efficient separationImprove filtering effectLignin derivativesPulp by-products recoveryLignin degradationBlack liquor
A method for precipitating (separation) of lignin, using small amounts of acidifying agents, whereby a lignin product or an intermediate lignin product is obtained which can be used as fuel or chemical feed stock (or as a chemical or a raw material for further refining), from a lignin containing liquid / slurry, such as black liquor. A method for separation of lignin from a lignin containing liquid / slurry, such as black liquor, whereby a more pure lignin is obtained, a lignin product or an intermediate lignin product obtainable by the above methods, and use, preferably for the production of heat or for use as chemical, of the lignin product or intermediate lignin product are also disclosed.
Owner:LIGNOBOOST
Thermal and acid tolerant beta xylosidases, arabinofuranosidases, genes encoding, related organisms, and methods
ActiveUS20100311110A1Decreasing proteolysisAllow stabilizationSugar derivativesMicrobiological testing/measurementXylanNucleic acid sequencing
Isolated and / or purified polypeptides and nucleic acid sequences encoding polypeptides from Alicyclobacillus acidocaldarius and variations thereof are provided. Further provided are methods of at least partially degrading xylotriose, xylobiose, and / or arabinofuranose-substituted xylan using isolated and / or purified polypeptides and nucleic acid sequences encoding polypeptides from Alicyclobacillus acidocaldarius and variations thereof.
Owner:BATTELLE ENERGY ALLIANCE LLC
Pre-extraction and solvent pulping of lignocellulosic material
InactiveUS20080196847A1Pretreatment with alkaline reacting compoundsFats/resins/pitch/waxes removal in pulpBoiling pointSolvent
A process of treating a lignocellulosic material includes a pre-extraction step in which hemicellulose is extracted from the lignocellulosic material. Then, in a solvent pulping step, the lignocellulosic material is separated into pulp by contacting the lignocellulosic material with a cooking liquor comprising a solvent. In one embodiment, the solvent has a boiling point of at least about 150° C. In another embodiment, the cooking liquor comprises a mixture of solvent and water.
Owner:INT PAPER CO +1
Extracting biopolymers from a biomass using ionic liquids
Owner:PROCTER & GAMBLE C0MPANY THE +1
Process of producing xylose and dissolving pulp
ActiveUS20110192560A1High yieldReduce the amount requiredPretreatment with water/steamWashing/displacing pulp-treating liquorsChromatographic separationXylan
The present invention relates to a process for the production of xylose and dissolving pulp from xylan-containing biomass, such as hardwood. The invention is based on prehydrolysis of the xylan-containing biomass with SO2 in specified conditions, followed by chromatographic fractionation, nanofiltration or precipitation crystallization of the xylose-containing prehydrolyzate to obtain a xylose product having a xylose content of at least 55% on DS. The dissolving pulp obtained from the process can be used for example for the production of viscose.
Owner:DUPONT NUTRITION BIOSCIENCES APS
Biomass pretreatment process
ActiveUS8168840B2Pressurized chemical processPretreatment with alkaline reacting compoundsCelluloseLignocellulosic biomass
A process is described for pretreating lignocellulosic biomass. The process comprises swelling the lignocellulosic biomass with an aqueous liquid. The pretreated lignocellulosic biomass may be used as a feedstock for the enzymatic conversion to ethanol, or in a thermal conversion. process to produce bio-oil. The pretreatment results in a greater yield and, in the case of a thermal conversion process, a better quality of the bio-oil. The pretreatment process may be used to adjust the composition and amount of inorganic material present in the lignocellulosic biomass material.
Owner:MARD INC
Method for producing chemically modified lignin decomposition products
A method for producing chemically modified lignin decomposition products. To this end, a lignin-containing starting material is decomposed into low-molecular and high-molecular lignin decomposition products under acid conditions in the presence of a liquid medium, and the low-molecular lignin decomposition products are at least largely separated in order to obtain a high-molecular fraction. Subsequently, the high-molecular lignin decomposition products present in the high-molecular fraction are converted into chemically modified lignin decomposition products. The chemically modified lignin decomposition products obtained in this way can be used, for example, as dispersing agents, complexing agents, phenol component, flocculant, thickener or auxiliary agents for cementous systems, coatings, paints or adhesives.
Owner:SIKA TECH AG
Biomass Treatment Apparatus
InactiveUS20090053800A1Small sizeIncrease surface areaBioreactor/fermenter combinationsPulp properties modificationFermentable sugarEnvironmental engineering
An apparatus was developed for treatment of biomass in which reactants are added to biomass and the biomass mixture is moved through the apparatus without compacting under force of a non-compacting piston. Treatment systems used in this reactor result in effectively treated biomass that is particularly suitable for subsequent saccharification to produce fermentable sugars.
Owner:EI DU PONT DE NEMOURS & CO +1
Fractionation of a lignocellulosic material
InactiveUS20100196967A1Lower Level RequirementsImprove permeabilityBiofuelsLignin derivativesCelluloseNon solvent
A method for fractionating a lignocellulosic material, the method comprising; contacting (2) the lignocellulosic material with an ionic liquid (3) and dissolving the lignocellulosic material therein, providing a second liquid (7) which is immiscible with the ionic liquid and is also a non-solvent for cellulose, adding the second liquid to the ionic liquid so as to form a biphasic system (6) which comprises an ionic liquid phase essentially free of lignocellulose and a second liquid phase comprising lignin in solution and cellulose as a precipitate, separating the two phases and recovering (8) the precipitated cellulose from the separated second liquid phase.
Owner:QUEENSLAND UNIVERSITY OF TECH
Organosolv and ozone treatment of biomass to enhance enzymatic saccharification
InactiveUS20100159522A1High selectivityPrevent acetic acid-induced hydrolysisSugar derivativesBiofuelsOrganosolvLignocellulosic biomass
Lignocellulosic biomass comprising lignin is treated with a solvent, such as organosolv, under alkaline conditions at elevated temperatures, filtered, then contacted with a gas comprising ozone to produce a readily saccharifiable biomass.
Owner:EI DU PONT DE NEMOURS & CO
Method for Separating Lignin from Black Liquor
ActiveUS20080047674A1Smoother resultAvoid cloggingLignin derivativesPulp by-products recoveryLignin degradationBlack liquor
Method for separating lignin from black liquor includes the following steps: a) precipitating lignin by acidifying black liquor and thereupon dewatering, b) suspending the lignin filter cake obtained in step a) to obtain a second lignin suspension and adjusting the pH level to approximately that of the washing water of step d) below, c) dewatering of the second lignin suspension, d) adding washing water and performing a displacement washing at substantially constant conditions without any dramatic gradients in the pH, and e) dewatering the lignin cake produced in step d) into a high dryness and displacing the remaining washing liquid in the filter cake, whereby a lignin product is obtained which has an even higher dryness after the displacement washing of step d). The lignin product or an intermediate lignin product obtained by the method, and its use, preferably for the production of heat or chemicals is also disclosed.
Owner:LIGNOBOOST
Process for generating a hydrocarbon feedstock from lignin
ActiveUS20090218061A1Increase energy contentMachine wet endLiquid carbonaceous fuelsBlack liquorBiofuel
The present invention discloses processes for generating a hydrocarbon feedstock for biofuels synthesis from lignin via hydroprocessing. Embodiments of the present invention can occur in a refinery setting or in a paper mill setting. Embodiments of the present invention can utilize the separated lignin or the entire black liquor solution.
Owner:CHEVROU USA INC
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