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| Number | Title | Issue Date |
| 7901541 | Method and arrangement for impregnating chips The method is for the impregnation of chips during the manufacture of chemical pulp. The chips are continuously fed without preceding steam treatment to the top of an impregnation vessel that maintains atmospheric pressure. Impregnation fluid (BL) is added to the im... | 03/08/2011 |
| 7615134 | Method and arrangement of impregnating chips The method and an arrangement are for improved impregnation of chips in association with the manufacture of chemical cellulose pulp. Un-steamed chips are fed into an impregnation vessel (30) in which a fluid level (LIQ_LEV) is established under the highest le... | 11/10/2009 |
| 7553394 | Method for removing potassium from ash produced in a kraft pulping process recovery boiler using a Na-type cation exchange organic resin In the process for producing kraft pulp, performing a potassium ion removal step of flowing an aqueous solution containing ashes recovered from a combustion exhaust gas generated in a black solution combustion step by a dust collector through a packed bed filled wit... | 06/30/2009 |
| 7459058 | Feed of a mixture of chips and fluid from a low-pressure system to a high-pressure system Chips are sluiced from a low-pressure section to a high-pressure section with a sluice feeder. The fluid that is used to expel the chips from the sluice feeder principally includes pressurized fluid withdrawn from the treatment vessel. This pressurized fluid is norm... | 12/02/2008 |
| 7455749 | Gas phase continuous digester having an inverted top separator with liquor injection A method for adding cooking liquor into a vapor phase continuous digester for producing chemical cellulose pulp from cellulose chips including: introducing a slurry of the cellulose chips from a feed system to an inverted top separator in a top vapor phase section o... | 11/25/2008 |
| 7422657 | Method for the feed of cellulose chips during the continuous cooking of cellulose The method is for feeding a chips-slurry from a low-pressure to a high-pressure system during the continuous cooking of chemical cellulose pulp. The feed takes place through a sluice feeder 53′ between these systems. The sluice feeder is provided with a rot... | 09/09/2008 |
| 7374637 | Method of bleaching cellulose pulp with a main conduit for wash liquor and filtrate The method is for bleaching cellulose pulp in a bleach line that has at least two bleaching steps. The filtrate distribution is led up through the bleaching line counter-currently to the flow of cellulose pulp established in the bleaching line. A single joint main c... | 05/20/2008 |
| 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 |
| 7351305 | Method and a digester for the continuous cooking of wood raw material to cellulose pulp The digester and method are for the continuous cooking of pulp. At least two withdrawal positions (11E, 11D) for cooking fluid are arranged at different heights in the digester (10). The cooking fluid in the first and second position is withdraw... | 04/01/2008 |
| 7351764 | Methods to enhance brightness of pulp and optimize use of bleaching chemicals Mechanical or Chemical pulp is treated with about 0.01 weight % to about 5 weight % of a Mixture. The Mixture is water; diethylenetriaminepentakis(methyl)phosphonic acid or its known salts; polyacrylic acid or its known salts; and optionally one or more inert compou... | 04/01/2008 |
| 7351306 | Cooking of cellulose pulp in a cooking liquor containing pre-evaporated black liquor The method is for cooking of cellulose pulp in which the raw material, preferably in the form of chips, undergoes a successive elevation of temperature towards the cooking temperature while the chips are first impregnated with an impregnation liquor followed by cook... | 04/01/2008 |
| 7326376 | Method and device for controlling the composition of the cellulose containing extrusion solution in the lyocell process A method of regulating the composition of the cellulose-containing extrusion solution in the production of cellulosic molded articles, whereby (a) cellulose is mixed with an aqueous amine oxide solution; (b) the mixture is converted to the extrusion solution by evap... | 02/05/2008 |
| 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 |
| 7229524 | Feeding arrangement for feeding of chips to chip bins The invention relates to a feed arrangement for feeding chips to chip bins (1) in the production of cellulose pulp in continuous digesters (16), in which the chip bin is constituted by a treatment vessel having a top and a bottom, in which the chips ar... | 06/12/2007 |
| 7229526 | Method and apparatus for the feeding of fibers A system for feeding fibres from a fibre separation step at a first pressure to a drying step at a second, lower pressure, the system comprising a sluice feeder (3) provided between the fibre separation step and the drying step. At least an outlet (14)... | 06/12/2007 |
| 7229525 | Methods to enhance pulp bleaching and delignification A method to enhance brightness in Chemical and Mechanical pulps comprising adding an organic sulfide chelant is described and claimed. A method to enhance delignification in a Chemical pulp comprising adding an organic sulfide chelant is also described and cl... | 06/12/2007 |
| 7226525 | Process for producing very low COD unbleached pulp A pulp product that has a low COD is comprised of an unbleached pulp that is soaked and washed in alkaline water for a sufficient time so that the COD after soaking and washing is less than or equal to 3.0 kg/1000 kg of dry pulp. The pulp is produced by repetitively... | 06/05/2007 |
| 7217338 | Process for continuously cooking chemical cellulose pulp The process is for continuously cooking chemical pulp in a digester system consisting of at least one vessel for impregnating and cooking comprising an inlet into which a mixture of chips and process liquid is fed. The chips are impregnated at a predetermined impreg... | 05/15/2007 |
| 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 |
| 7168233 | System for controlling steam temperature A system for controlling steam temperature that includes steam circuit including a reheater circuit, at least one reheater dilution region, at least one reheater dilution conduit, and at least one reheater supply region disposed upstream of the at least one reheater... | 01/30/2007 |
| 7152522 | Screw press with radial gate valve and supported screw shaft A screw press is provided having a radial gate valve and supported longitudinally-extending screw shaft. The screw shaft includes a central shaft and helical threads which is driven by a drive package. The screw shaft is encapsulated within a housing including a hop... | 12/26/2006 |
| 7147750 | Extraction with compaction and springback considerations A vessel is constructed with (preferably substantially stationary) screen surfaces which minimize compaction of comminuted cellulosic fibrous material, and allow springback of the material, as it flows downwardly. A slurry of wood chips, sawdust, or pulp is passed d... | 12/12/2006 |
| 7112256 | Method for continuous cooking of chemical pulp to improve heat economy A method for the continuous cooking of chemical pulp with the aim of achieving improved heat economy in a digester system having a vessel (1) for impregnation and a vessel (2) for cooking the impregnated cellulose chips. A part of the black liquor (... | 09/26/2006 |
| 7105076 | Gas phase continuous digester having an inverted top separator with liquor injection A continuous digester is disclosed for producing chemical cellulose pulp from cellulose chips, comprising: a continuous digester vessel having a lower section filled with the cellulose chips and an upper gas filled section; an inverted separator at least partially i... | 09/12/2006 |
| 7101832 | Cleaners containing peroxide bleaching agents for cleaning paper making equipment and method A cleaning solution for paper making equipment includes a stabilized source of peroxide in combination with a glycol ether solvent system and an alcohol ethoxylate. The peroxide system can be hydrogen peroxide stabilized with a phosphonate such as HEDP. The glycol s... | 09/05/2006 |
| 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 |
| 7081184 | Process for making a very low COD unbleached pulp A process for making a pulp product that has a low COD is comprised of soaking and washing pulp in alkaline water for a sufficient time so that the COD after soaking and washing is less than or equal to 2.0 kg/1000 kg of dry pulp. The process includes repetitively s... | 07/25/2006 |
| 7081183 | Method of deresinating pulp using alkyl alcohol alkoxylate surfactants This invention is a method of reducing the resin content of chemical pulps comprising heating wood chips in an aqueous alkaline medium in the presence of an effective deresinating amount of an alkyl alcohol alkoxylate of formula RO[(CH2CHCH3O) | 07/25/2006 |
| 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 |
| 6986829 | Process and container for stacking high-consistency stock Process and container for stacking and diluting paper fiber stock. The process includes stacking a high-consistency stock in a first volume for defined dwell time, conveying stock to second volume arranged to adjoin downstream first volume, diluting stock in second ... | 01/17/2006 |
| 6966970 | Method for supplying washing liquid to a process for cooking cellulose pulp The invention relates to a method for supplying washing liquid to a digester (1) for cellulose pulp and a subsequent diffuser washing device (2a, 2b). A high, disturbance-free production capacity can be obtained by using a common feed pump (P... | 11/22/2005 |
| 6915734 | Pizza making method and system The invention provides an automated method and apparatus for pizza production which is initiated by individual order placement and uses only fresh ingredients (no ingredients are frozen, pre-prepared or pre-cooked). Each dough portion is individually and mechanicall... | 07/12/2005 |
| 6808596 | System for the oxygen delignification of pulp consisting of lignocellulose-containing material The system is for the oxygen delignification, in at least two reaction stages, of pulp that consists of lignocellulose-containing material having a mean concentration of 8%-18% pulp consistency. The oxygen delignification takes place in a first reaction stage that h... | 10/26/2004 |
| 6752902 | Preparation of chemical pulp and xylose, utilizing a direct acid hydrolysis on the pulp The invention relates to a method of preparing chemical pulp and xylose by the use of alkaline or neutral cooking and post hydrolysis of the pulp by performing the post hydrolysis directly on the pulp by means of acid treatment. In the method of the invention, the x... | 06/22/2004 |
| 6719878 | Method for avoiding mechanical damage of pulp A method for producing chemical pulp from cellulosic material by means of alkaline cooking, including cooking the material to pulp at cooking temperature in a digester, reducing the temperature at the end of the cook, substantially relieving the overpressure in the ... | 04/13/2004 |
| 6699357 | Process for continuous cooking of pulp The invention relates to a process for continuous cooking of wood chips at elevated pressure and temperature in a vertical digester (1) for production of chemically dissolved pulp. Fiber material and cooking liquor are introduced at the top of the digeste... | 03/02/2004 |
| 6673201 | Top separator with intraseal for digester vessel in a pulp or fiber processing system A top separator assembly for a digester is disclosed comprising: a rotatable shaft for the top separator; a packing for the shaft; and a sealing ring operatively mounted to the shaft and having a nominal clearance with the pack box, said sealing ring moun... | 01/06/2004 |
| 6649023 | Process for digesting woodchips and digester additives The invention relates to a process for digesting woodchips used in papermaking. The process employs a digester additive, which is a mixture of (a) a polyglycoside, and (b) a polyoxyalkylene glycol. The digester additives are compatible and stable at eleva... | 11/18/2003 |
| 6605180 | Process for continuous cooking of pulp Fiber material and cooking liquor are introduced at the top of the digester and pulp is discharged from the bottom of the digester, via a line in which the pulp is maintained at substantially the same pressure level, to a pressurized wash. More than 50% o... | 08/12/2003 |
| 6589391 | Top separator with intraseal for digester vessel in a pulp or fiber processing system A top separator assembly for a digester is disclosed comprising: a rotatable shaft for the top separator; a packing for the shaft; and a sealing ring operatively mounted to the shaft and having a nominal clearance with the pack box, said sealing ring moun... | 07/08/2003 |
