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| Number | Title | Issue Date |
| 7368037 | Refiner steam separation system for reduction of dryer emissions A refiner steam separation system according to the present invention includes a blowline for transporting a mixture of fiber material from a refiner to an inlet of a steam separator. Waste steam is discharged from the separator through a waste steam outlet. Cleaned ... | 05/06/2008 |
| 7282114 | Method for processing pulp The object of the invention is a method and a device for dispersing pulp, especially pulp containing waste paper, in which method ground pulp mass is fed between the blade surfaces (4) of a dispersing device that are brought in a rotating movement in relation to one... | 10/16/2007 |
| 7279070 | Method for the continuous cooking of wood raw material for cellulose pulp The invention concerns a simplified method for the continuous cooking of wood raw material in the form of sawdust for the production of cellulose pulp, The method does not require any thickening stages and can be carried out with a minimum of process equipment. The ... | 10/09/2007 |
| 7241389 | Oxidizing processes by oxygen transfer within a liquid medium in a reactor under pressure Methods for oxidizing a liquid with an oxidization gas in a closed volume reactor. A feed liquid which contains compounds to be oxidized is fed into the closed volume reactor, and a feed gas containing oxygen is fed into the reactor so as to form a gas overhead abov... | 07/10/2007 |
| 7237943 | Dynamic fluid mixer A dynamic mixer in which two elements are rotatable relative to each other about a predetermined axis and between which is defined a flow path extending between an inlet for materials to be mixed and an outlet. The flow path is defined between surfaces of the elemen... | 07/03/2007 |
| 7186385 | Apparatus for providing gas to a processing chamber An apparatus for generating gas for a processing system is provided. In one embodiment, an apparatus for generating gas for a processing system includes a canister having at least one baffle disposed between two ports and containing a precursor material. The precurs... | 03/06/2007 |
| 7169258 | Process and a fluffer device for treatment of a fiber stock suspension A device treats a fiber stock suspension with at least one additive, the fiber stock suspension being used for production of at least one of paper and cardboard. The fiber stock suspension includes a suspension medium and a fiber material. The fiber material has fib... | 01/30/2007 |
| 7097740 | Method and screen for screening at least two pulp mixtures The invention relates to a method and a screen for screening two or more pulp mixtures with different roughness. The screen comprises a first screen cylinder and a second screen cylinder. A coarse first pulp mixture is fed into the inlet end of the first screen cyli... | 08/29/2006 |
| RE39208 | Method of treating material in a continuous digester A comminuted cellulosic fibrous material treatment vessel assembly includes a substantially vertical vessel having a top, bottom, and outlet, and through which the material flows in a flow direction. The vessel preferably has a substantially cylindrical wall with at... | 08/01/2006 |
| 6958110 | Apparatus for the production of cellulose paper pulps by biodelignification of vegetative masses Apparatus for the production of cellulose paper pulps from vegetative masses, comprising: a tower for sterilizing the mass to form a culture medium; a first screw for mixing the sterilized mass with an inoculum and handling the same in a sterile environment; a first... | 10/25/2005 |
| 6841042 | Feeding comminuted fibrous material using high pressure screw and centrifugal pumps A system and method for feeding comminuted cellulosic fibrous material such as wood chips to the top of a treatment vessel such as a continuous digester provide enhanced simplicity, operability, and maintainability by eliminating the high pressure transfer device co... | 01/11/2005 |
| 6767432 | Apparatus for the thickening of fiber suspensions The present invention relates to the thickening of pulp suspensions. A low consistency pulp suspension is fed to a pre-thickener (10) through an inlet conduit (18). A layer of thickened pulp, formed on a filter surface (22), is pushed along the ... | 07/27/2004 |
| 6755941 | Apparatus for loading fibers with calcium carbonate For a process and an apparatus for loading fibers contained in a pulp suspension with calcium carbonate, a calcium oxide and/or a medium containing calcium hydroxide is fed to the pulp suspension, and the so treated pulp suspension is further charged in several reac... | 06/29/2004 |
| 6582554 | Continuous digester having a sectioned top separator with multiple liquor extraction ports A method is disclosed for extracting liquor from a cellulose slurry for a continuous digester comprising the steps of: providing the cellulose slurry of liquor and chips of cellulose fiber material to a separator; extracting a first stream of liquor from ... | 06/24/2003 |
| 6551462 | System for feeding comminuted fibrous material A system and method for feeding comminuted cellulosic fibrous material such as wood chips to the top of a treatment vessel such as a continuous digester provide enhanced simplicity, operability, and maintainability by eliminating the high pressure transfe... | 04/22/2003 |
| 6464826 | Method for producing and treating wood fiber Method is disclosed for treating wood chips including a heater for preheating the wood chips in the presence of steam, a beater to mechanically process the wood chips into wood fibers, a cyclone for separating the wood fibers from steam and volatile organ... | 10/15/2002 |
| 6436233 | Feeding cellulose material to a treatment vessel A feed system for a cellulose pulp treating vessel (such as a continuous digester) is not limited by the required L/W ratio of the pump feeding a wood chip slurry to a high pressure transfer device, the feed system may be kept at a low temperature to mini... | 08/20/2002 |
| 6379504 | Apparatus for pulping sawdust Chemical cellulose pulp is made from sawdust utilizing a static down-flow retention vessel. By adding steam and cooking liquor to a flow of sawdust a heated slurry, at a cooking temperature of about 250-350° F., is produced. The heated slurry is, at supe... | 04/30/2002 |
| 6375796 | Method of treating material in a continuous digester A comminuted cellulosic fibrous material treatment vessel assembly includes a substantially vertical vessel having a top, bottom, and outlet, and through which the material flows in a flow direction. The vessel preferably has a substantially cylindrical w... | 04/23/2002 |
| 6358363 | Method and apparatus for bleaching pulp using two fluidizing mixers A method and apparatus for bleaching medium consistency pulp with ozone using at least 2 fluidizing mixers to mix ozone and carrier gas into the pulp. The method is particularly applicable when the volume of the bleaching gas is larger than the volume use... | 03/19/2002 |
| 6332954 | Continuous digester system having a top separator A method in connection with continuous cooking of chips, comprising impregnation of the chips with impregnation liquid in an impregnation vessel (3) and cooking of the impregnated chips in a digester (4), the impregnation vessel and the digester being con... | 12/25/2001 |
| 6280575 | Frusto-conical outlet for a cellulose material treatment vessel In a cellulose pulp handling vessel having a first diameter material storing or treating portion above a second diameter discharge which is at least 20% less than the first diameter, reduced compression of the material and reduced power requirements of an... | 08/28/2001 |
| 6210532 | Means for conveying pulp having differential pressure control A walled passageway, having openings therein only at opposite, inlet and outlet ends thereof, has a shaft journalled therein. The shaft carries a screw thereon for moving shredded pulp through the passageway. The screw is foreshortened, having a length le... | 04/03/2001 |
| 6156159 | Device for mixing of a fluid into a pulp-suspension Process and device for mixing fluid into a pulp suspension of cellulose-containing fiber material, in which the pulp suspension is pumped in through a pump inlet (17), brought into rotation and, at the desired reaction pressure, mixed with the said fluid ... | 12/05/2000 |
| 6129816 | Tapered screen assembly for a cellulose pulp digester A comminuted cellulosic fibrous material treatment vessel assembly includes a substantially vertical vessel having a top, bottom, and outlet, and through which the material flows in a flow direction. The vessel preferably has a substantially cylindrical w... | 10/10/2000 |
| 6077396 | Apparatus for fluffing and contacting high consistancy wood pulp with a gaseous bleaching reagent A guide vane is provided in a pin fluffer to assist in pulp mat retention during fluffing by providing a cyclic lift component to the mat as it passes over the vane thereby also further increasing retention time obtained in the fluffer.... | 06/20/2000 |
| 6063238 | Black liquor impregnation in digester The present invention relates to a digester and a method for continuously cooking kraft pulp in a single-vessel system (1), preferably a single-vessel hydraulic digester, with chips (2) being fed in at a first end (3) of the digester (1), white liquor (4)... | 05/16/2000 |
| 5942088 | Apparatus for bleaching high consistency pulp with a gaseous bleaching reagent A method and apparatus for bleaching high consistency pulp with a gaseous bleaching reagent. The pulp is shredded and then fluffed in the presence of a contacting gas which includes the gaseous bleaching reagent within an upstream vessel comprising a pin/... | 08/24/1999 |
| 5918978 | Device for mixing chemicals into a fibrous material suspension The invention refers to a device for mixing chemicals into a pulp suspension, where a high-speed rotor (5) with an open center is mounted inside a mixing chamber (2). It is mainly characterized by at least one further high-speed rotor (5') with open cente... | 07/06/1999 |
| 5863389 | Pulp bleaching reactor for dispersing high consistency pulp into a gaseous bleaching agent containing ozone An apparatus for delignifying and bleaching a lignocellulosic pulp without the use of elemental chlorine. The bleaching reactor is a horizontal vessel having a central rotatable shaft which preferably contains paddles, cut and folded screw flights or a ri... | 01/26/1999 |
| 5813758 | Concentric ring fluidizing mixer A mixer, having a unique rotor, is particularly suitable for mixing paper pulp having a consistency of about 6-15% (medium consistency) with a bleaching gas having an ozone content of at least one percent, and typically at least six percent. The rotor com... | 09/29/1998 |
| 5762760 | Reactor for treating pulp with a gas The reactor comprises a pressurized vessel having an outlet member at its top and further including a blow line. The outlet member includes a housing that is in fluid communication with the vessel and to which the blow line is connected. A rotor is arrang... | 06/09/1998 |
| 5746890 | Device for admixing a processing agent into a pulp suspension Mixing devices for mixing a processing agent with a pulp suspension are disclosed including a mixing vessel, an agitator mounted on the surface of the mixing vessel to create a flow of the pulp suspension across the mixing vessel, a processing agent suppl... | 05/05/1998 |
| 5736005 | Scraper device for a continuous digester The present invention relates to a scraper device, preferably a bottom scraper arranged at the bottom of a continuous digester for pulp production, which scraper comprises at least one scraper arm (12), preferably arranged with shovel members (13), a shaf... | 04/07/1998 |
| 5711852 | Method and device for mixing of a fluid into a pulp-suspension A process and device for mixing fluid into a pulp suspension of cellulose-containing fiber material, in which the pulp suspension is pumped in through a pump inlet, brought into rotation and, at the desired reaction pressure, mixed with the said fluid whi... | 01/27/1998 |
| 5672245 | Recycling of knots in a continuous process for cooking chemical pulp The present invention relates to a process for continuous cooking of chemical pulp, in which the chips are fed into a chip chute (3), which is arranged on top of a high pressure feeder (4) for passing the chips into a downstream, pressurized continuous di... | 09/30/1997 |
| 5658428 | Method for impregnation in a single-vessel hydraulic digester The present invention relates to a method for continuous cooking of kraft pulp in a single-vessel system (1), preferably a single-vessel hydraulic digester, with chips being conveyed from a high-pressure feeder (2) in a transfer line (2A, 4A) to a first e... | 08/19/1997 |
| 5630909 | Pulp fluffing gas contactor A guide vane is provided in a pin fluffer to assist in pulp mat retention during fluffing by providing a cyclic lift component to the mat as it passes over the vane thereby also further increasing retention time obtained in the fluffer.... | 05/20/1997 |
| 5591308 | Wood pulp reactor An oxygen delignification method and apparatus in which a charge of heated wood pulp is reacted with oxygen in the presence of a charge of caustic soda in a plurality of reaction stages located between mixing stages in which caustic is mixed with the wood... | 01/07/1997 |
| 5589036 | Controlling pulp flow in an upflow pulp treatment tower The flow patterns of the wood/paper pulp in a paper pulp treatment tower are controlled to provide for even flow through and discharge of the pulp from the upper end of the tower. Flow-altering fluids are injected into the pulp stock in the tower via appr... | 12/31/1996 |
