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| Number | Title | Issue Date |
| 8168038 | Processing biomass Biomass (e.g., plant biomass, animal biomass, and municipal waste biomass) is processed to produce useful products, such as fuels. For example, systems are described that can use feedstock materials, such as cellulosic and/or lignocellulosic materials, to produce et... | 05/01/2012 |
| 8070912 | Cellulosic and lignocellulosic structural materials and methods and systems for manufacturing such materials Methods of treating wood and wood products include irradiating untreated wood having a first molecular weight with ionizing radiation to cause an increase in the molecular weight of a cellulosic component of the wood to a second, relatively higher molecular weight. | 12/06/2011 |
| 8052838 | Functionalizing cellulosic and lignocellulosic materials Irradiated lignocellulosic or cellulosic materials are provided which contain carboxylic acid groups and/or other functional groups not present in a naturally occurring cellulosic or lignocellulosic material from which the irradiated material was obtained. ... | 11/08/2011 |
| 7935219 | Cellulosic and lignocellulosic structural materials and methods and systems for manufacturing such materials Methods of treating wood and wood products include irradiating untreated wood having a first molecular weight with ionizing radiation to cause an increase in the molecular weight of a cellulosic component of the wood to a second, relatively higher molecular weight. | 05/03/2011 |
| 7867359 | Functionalizing cellulosic and lignocellulosic materials Irradiated lignocellulosic or cellulosic materials are provided which contain carboxylic acid groups and/or other functional groups not present in a naturally occurring cellulosic or lignocellulosic material from which the irradiated material was obtained. ... | 01/11/2011 |
| 7867358 | Paper products and methods and systems for manufacturing such products Methods of producing cellulosic or lignocellulosic materials for use in papermaking include treating a cellulosic or lignocellulosic dry feedstock having a first average molecular weight with ionizing radiation, and controlling the dose of ionizing radiation such th... | 01/11/2011 |
| 7846295 | Cellulosic and lignocellulosic structural materials and methods and systems for manufacturing such materials Methods of treating wood and wood products include irradiating untreated wood having a first molecular weight with ionizing radiation to cause an increase in the molecular weight of a cellulosic component of the wood to a second, relatively higher molecular weight. | 12/07/2010 |
| 7758722 | Production method for an absorbent fiber product and corresponding absorbent fiber product The invention relates to a method for producing an absorbent fiber product, starting with a parent fiber product that comprises fibers that, on the one hand, lie at a statistical distance from one another and, on the other hand, make contact with one another at cont... | 07/20/2010 |
| 7390669 | Simultaneous and rapid determination of multiple component concentrations in a Kraft liquor process stream The present invention is a rapid method of determining the concentration of the major components in a chemical stream. The present invention is also a simple, low cost, device of determining the in-situ concentration of the major components in a chemical stream. In ... | 06/24/2008 |
| 7294233 | System and method for altering the tack of materials using an electrohydraulic discharge A system and method for altering the tack of a material, namely a polymer used as an adhesive, also known as stickies, or pitch. The present invention reduces the tack of the stickies and pitch by exposing the materials for a short duration to low-energy pulsed elec... | 11/13/2007 |
| 7267744 | Pulp treatment and process This invention provides a process for treating chemical woodpulp, or chemical cellulose including cotton linter, including the step of applying an electron processing technology (EPT) step to chemical woodpulp, or chemical cellulose, as the case may be, on an in-lin... | 09/11/2007 |
| 7147755 | Ultrasonic transducer system The method is for treating a liquid or slurry with an ultrasonic energy. A movable endless member is provided that is permeable to a liquid. A transverse foil is disposed below the member and extends across the member and a transducer is in operative engagement with... | 12/12/2006 |
| 7056418 | Cooking method for pulp A lignocellulose material is cooked by means of an alkaline cooking liquor containing polysulfides in the presence of a quinone-hydroquinone compound, of which the oxidation-reduction potential in the form present during the cooking, which potential is a value calcu... | 06/06/2006 |
| 6736904 | Method and apparatus for the generation of ultrasonic energy fields within circular structures containing a liquid A resonant chamber that produces an ultrasonic energy field about a central axis of the chamber to separate contrary matter from a working material. The resonant chamber has a circular cross section and utilizes a series of transducer elements to generate an ultraso... | 05/18/2004 |
| 6572733 | System and method for altering characteristics of materials using an electrohydraulic discharge System and method for oxidizing contaminants to alter specific properties, such as tack, of contaminants. The present invention reduces the tack of the stickies and pitch by exposing the materials for a short duration to low-energy pulsed electrical disch... | 06/03/2003 |
| 6511578 | Bleaching and delignifying cellulosic pulp using caroate/caro's acid solution The invention relates to a method of bleaching and/or delignifying cellulose, in which (a) a sodium hydroxide solution and a peroxydisulphate solution are first of all produced by electrolysis of a sulphate, (b) the peroxydisulphate solution is converted by hy... | 01/28/2003 |
| 6334930 | Measurement device for quantitatively detecting constituents of a pulp/fluid mixture Measurement device for quantitatively detecting constituents of a pulp/fluid mixture for paper and/or cardboard production. The device includes at least one radiation source for irradiating the mixture in a number of definite, different wavelength ranges.... | 01/01/2002 |
| 6319359 | Process for quantitatively detecting constituents of a pulp/fluid mixture Process and measurement device for quantitatively detecting constituents of a pulp/fluid mixture for paper and/or cardboard production. The device includes at least one radiation source for irradiating the mixture in a number of definite, different wavele... | 11/20/2001 |
| 6319358 | Electrolytic causticizing of smelt from a kraft recovery furnace An electrochemical process is provided for treatment of molten kraft smelt produced from black liquor in a kraft recovery boiler. Treated smelt can be contacted with water to produce white liquor which can be re-used or recycled in the kraft process.... | 11/20/2001 |
| 6254726 | Process and apparatus for detecting moisture content in a supported fibrous web Apparatus and process in a machine for at least one of producing and processing the fibrous web. The apparatus includes an essentially water-free traveling surface adapted to guide the fibrous web, and a measuring device positioned and adapted to detect m... | 07/03/2001 |
| 6176970 | Device and method of using explosive forces in a contained liquid environment A method and apparatus for subjecting a material in a liquid to explosive forces is provided. The method and apparatus involve a vessel having a length greater than it width. The vessel has a top which is quickly and easily lockable and removable so as to... | 01/23/2001 |
| 5961803 | Leaching process An increasing problem with the pulping chemical recovery system, is the presence of chloride and potassium in the recovery boiler. Chloride and potassium increase inter alia the stickiness of carryover deposits and dust particles to the recovery boiler tu... | 10/05/1999 |
| 5843316 | Method of separating sodium hydroxide from white liquor or polysulfide liquor using diffusion dialysis The present invention relates to a method of processing white liquor obtained from the causticization stage of a pulp mill. According to the method, the white liquor, which principally contains sodium hydroxide (6) and sodium sulfide, is oxidized into pol... | 12/01/1998 |
| 5792315 | Purifying aqueous effluent from a pulp mill using electro chemical membrane device This invention is related to a process for producing pulp from a cellulosic starting material, wherein an aqueous process effluent is purified from metal impurity cations. This process comprises that the effluent is purified by an electro-chemical membran... | 08/11/1998 |
| 5770010 | Pulping process employing nascent oxygen This invention relates to an environmentally preferred process for the delignification of a cellulosic biomass comprising pulp. The process uses the oxidative properties of nascent oxygen to complete pulping and bleaching operations. The process may be us... | 06/23/1998 |
| 5628874 | Reduction of chloride in pulping chemical recovery systems The present invention relates to an environmental-friendly process for reducing the content of chloride in a liquor inventory of a chemical pulp mill. According to the invention, in a recovery system for pulping chemicals containing sulphur and an alkali ... | 05/13/1997 |
| 5595628 | Production of pulp by the soda-anthraquinone process (SAP) with recovery of the cooking chemicals A process for the production of cellulose from wood and annual plants is provided where the digesting liquor contains free caustic soda, sodium salts of alkyl benzenesulfonic acids, and of aromatic or aliphatic carboxylic acids. By the addition of anthraq... | 01/21/1997 |
| 5439557 | Method of recovering energy and chemicals from a spent liquor using low frequency sound in a recovery boiler A method of recovering energy and chemicals from a spent liquor which, after thickening to a dry content of 50-90%, is fed into a reaction chamber (1) in which a plurality of temperature zones are maintained, said method comprising the steps of (a) conver... | 08/08/1995 |
| 5370771 | Process for recovering energy and chemicals from spent liquor using low frequency sound A process and reactor for recovering energy and chemicals from spent liquor obtained in pulp production by thermal decomposing the spent liquor are described, said decomposing being carried out in a reactor at a pressure of from atmospheric pressure up to... | 12/06/1994 |
| 5238538 | Method for deinking recycled fiber by applying direct current electric field A method for the deinking of recycled fibers, in which the macerated fibers are slurried with water; introduced to a deinking cell which has a central anode and a perimetal cathode; subjected to a direct current electric field applied between the anode an... | 08/24/1993 |
| 5196069 | Apparatus and method for cellulose processing using microwave pretreatment A method for pretreating a cellulosic waste product with microwaves is disclosed as well as a method and apparatus for converting cellulosic wastes into soluble saccharides. The invention greatly enhances a reaction rate for enzymatic hydrolysis. A feed m... | 03/23/1993 |
| 5061343 | Recovery of NaOH and other values from spent liquors and bleach plant effluents Oxidized weak black liquor or effluents from alkaline bleaching stages, particularly oxygen delignification and/or ozone and/or hydrogen peroxide bleaching effluents are treated in process stages which include an electrolytic cell to recover NaOH, lignin,... | 10/29/1991 |
| 4995943 | Pretreatment of cellulosic material with carbon dioxide Pretreatment of cellulosic material with carbon dioxide gas, preparatory to being converted chemically, as by hydrolysis, etc. Biomass material, such as branches, stalks, brush, or foliage, or cellulosic products, such as waste paper or cardboard, is redu... | 02/26/1991 |
| 4933292 | Method for controlling and measuring cellulose digestion A procedure for controlling cellulose digestion by measuring activity of chemicals essentially influencing the cellulose digestion and which are present in a cellulose digester. Feeding of chemicals to be added into the cellulose digester is controlled on... | 06/12/1990 |
| 4869784 | Controlling water input to pulp washing system based on measurements on reduced dimension stream Wash water input into a pulp washing system is controlled in response to measurements on a stream of output constituents of reduced transverse dimension compared to the transverse dimension of the washed pulp mat discharge stream from the pulp washing sys... | 09/26/1989 |
| 4840704 | Controlling characteristics of a pulp mat on a pulp washing surface Pulp washing efficiency at any given dilution factor and production rate is maximized by controlling washing surface speed in response to determination of total mass of product stream in weight per unit area on the surface and simultaneously controlling t... | 06/20/1989 |
| 4826566 | Rapid disolution of lignin and other non-carbohydrates from ligno-cellulosic materials impregnated with a reaction product of triethyleneglycol and an organic acid A method of rapidly and efficiently treating ligno-cellulosic material for removal of lignin and other non-carbohydrates as well as non-cellulosic carbohydrates from cellulosic matter. Such material is first impregnated with a liquor which is a reaction p... | 05/02/1989 |
| 4596630 | Process for the electrochemical reductive bleaching of lignocellulosic pulp Reductive bleaching of lignin containing pulps employing polydentate ligand complexes of dipositive vanadium, chromium and titanium. High brightness pulps with good reversion stability are obtained. The process is essentially polution free as the reduced ... | 06/24/1986 |
| 4576609 | Process for the treatment of cellulosic materials with oxidizing agents and microwaves Cellulosic materials and more particularly wood shavings, pulps, and cellulosic textile fibres are exposed to the combined action of microwaves and at least one oxidizing agent. In particular, the process makes it possible to improve the brightness of the... | 03/18/1986 |
| 4544596 | Stabilized absorbent structure containing non-delignified wood pulp fibers A batt of non-delignified fibers is stabilized by applying ultrasonic energy thereto in narrow compressed lines which aid in distributing liquid within the batt. The fibers are partially delignified at fiber intersections which are hydrogen bonded. Supple... | 10/01/1985 |
