| Patents for D21C 7 - Digesters (1,988) |
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| 07/29/2010 | WO2010083600A1 Method and apparatus for conveying a cellulosic feedstock |
| 07/29/2010 | US20100186609 Plug screw feeder for feeding cellulose pulp/chips |
| 07/23/2010 | CA2650919A1 Method and apparatus for conveying a cellulosic feedstock |
| 07/23/2010 | CA2650913A1 Method and apparatus for conveying a cellulosic feedstock |
| 07/22/2010 | WO2010081476A1 Method and apparatus for in-feeding of matter to a process reactor |
| 07/22/2010 | CA2749184A1 Method and apparatus for in-feeding of matter to a process reactor |
| 07/21/2010 | CN101319472B Plant fiber raw material reaction warehouse |
| 07/21/2010 | CN101302728B Sisal hemp pulp and preparation thereof |
| 07/21/2010 | CN101148833B Paper-making-stage reclaiming wood pulp plate denaturalization producing technique |
| 07/14/2010 | CN201525980U Waste heat recovering and utilizing apparatus |
| 07/06/2010 | US7749354 digester comprises a wash zone having a plurality of individual wash screens disposed about an inner wall of digester for withdrawal of co-current downflow liquor from wash zone; liquor uniformly and automatically distributed between all of the wash screens; maximizes energy and wash efficiency |
| 06/30/2010 | CN101760988A Mixed pulp material and cultural paper prepared from the same |
| 06/30/2010 | CN101760975A Circulation process for performing ammonium sulfite pulping by using sulfur-containing flue gas absorber |
| 06/30/2010 | CN101760974A Process for performing ammonium sulfite pulping by using sulfur-containing flue gas absorber |
| 06/23/2010 | CN201512714U Spray explosion tank for heating power spray explosion paper pulp making |
| 06/23/2010 | CN101748635A Method for preparing slurry by replacement cooking |
| 06/23/2010 | CN101748633A Novel cellulose extraction process |
| 06/23/2010 | CN101748632A Pulping process of paper pulp |
| 06/23/2010 | CN101748628A Bamboo fiber extraction process |
| 06/23/2010 | CN101148834B Paper-making-stage broad-leaved wood pulp plate denaturalization producing technique |
| 06/23/2010 | CN101148832B Paper-making-stage high viscosity wood pulp plate denaturalization producing technique |
| 06/16/2010 | CN101018906B Screen assembly for a pulp digester |
| 06/15/2010 | US7736467 Screen assembly for a pulp digester |
| 06/09/2010 | EP2193233A1 An apparatus for discharging pulp from a vessel, method of discharging pulp form a vessel and method of upgrading a pulp vessel |
| 06/09/2010 | CN101148836B Paper-making-stage bamboo wood pulp plate denaturalization producing technique |
| 06/02/2010 | EP2191261A2 Electrode |
| 05/27/2010 | WO2010058285A2 Methods and devices for continuous transfer of particulate and/or fibrous material between two zones with different temperatures and pressures |
| 05/27/2010 | CA2744422A1 Methods and devices for continuous transfer of particulate and/or fibrous material between two zones with different temperatures and pressures |
| 05/26/2010 | CN201485740U Feeding device of spiral feeder |
| 05/19/2010 | CN101158125B Paper-making grade softwood pulp plate modifying production technique |
| 05/19/2010 | CN101148837B Paper-making-stage primary color wood pulp plate denaturalization producing technique |
| 05/19/2010 | CN101148835B Paper-making-stage wood pulp plate denaturalization producing technique |
| 05/19/2010 | CN101117779B Method of mechanical pulp making by using cotton pole |
| 05/12/2010 | CN101105011B Oxygen delignification and bleaching integration paste preparing method and device for realizing the same method |
| 05/11/2010 | US7713383 Arrangement for feeding a slurry of chips and liquid |
| 05/10/2010 | CA2681687A1 Apparatus and method for treating, pressing and washing biomass |
| 04/22/2010 | WO2010044732A1 Method for preventing clogging in a strainer construction for a continuous digester |
| 04/22/2010 | CA2740196A1 Method for preventing clogging in a strainer construction for a continuous digester |
| 04/21/2010 | CN101696556A Explosion tank for making paper pulp by heat explosion |
| 04/14/2010 | CN101135119B Method for manufacturing pulp raw material by biofermentation and culture method for the bacterial |
| 04/06/2010 | US7691235 Apparatus and method for separating steam from pulp fibers |
| 04/01/2010 | WO2010034096A1 Horizontal re-pulping apparatus for cellulose fibres |
| 04/01/2010 | CA2737128A1 Horizontal re-pulping apparatus for cellulose fibres |
| 03/24/2010 | CN201428088Y Pressure vertical digester |
| 03/24/2010 | CN101680551A Mechanical seal device |
| 03/24/2010 | CN100595375C Chemimechanical desilication of nonwood plant materials |
| 03/10/2010 | EP2160289A1 Plug screw feeder for feeding cellulose pulp/chips |
| 03/10/2010 | CN201420203Y Movable type spherical digester loading machine |
| 03/10/2010 | CN201420202Y Frothing device for protection of steam inlet pipe of rotary spherical digester |
| 03/04/2010 | WO2010024763A1 A single vertical atmospheric vessel for steaming, slurrying, impregnating and digesting fibrous material |
| 03/04/2010 | US20100051222 Continuous digester system |
| 03/04/2010 | CA2735087A1 A single vertical atmospheric vessel for steaming, slurrying, impregnating and digesting fibrous material |
| 02/23/2010 | CA2455172C Feeding comminuted fibrous material using high pressure screw and centrifugal pumps |
| 02/09/2010 | US7658820 Digester wash extraction by individual screen flow control |
| 02/09/2010 | US7658818 Method for converting a digester for use as a gas phase and hydraulic phase continuous digester |
| 02/09/2010 | CA2462264C Method and system for the treatment of pulp prior to ozone bleaching |
| 01/28/2010 | WO2010009551A1 Method and apparatus for conveying a cellulosic feedstock |
| 01/27/2010 | CN100585067C Water washing continuous boiling method and its device for grass fiber raw material |
| 01/20/2010 | CN100582361C Method of producing fir chemical pulp |
| 01/07/2010 | WO2010002348A1 A method and an apparatus for controlling a flow of pulp suspension |
| 01/07/2010 | CA2729452A1 A method and an apparatus for controlling a flow of pulp suspension |
| 01/06/2010 | CN101619548A Boiling method for spherical boiler |
| 01/05/2010 | US7641767 Apparatus for treating a fibrous suspension |
| 12/10/2009 | US20090301673 System and a method for the steam pre-treatment of chips in association with the production of chemical cellulose pulp |
| 12/09/2009 | CN100567639C Tissue paper with protruding lotion deposits |
| 12/09/2009 | CN100567631C Disc type heat dispersing method and its device for paper-making process and use |
| 12/02/2009 | EP2126196A1 Vapour phase digester and a method for continuous cooking |
| 12/02/2009 | CN100564665C Clean production method for rice-wheat straw pulp capable of poaching by acetic acid method |
| 11/26/2009 | WO2009140808A1 A process and system for pulping which are environmental protective, energy saving, circulating and green |
| 11/26/2009 | WO2009140807A1 Multifunctional and integrated pulping apparatus including high density digesting and bleaching |
| 11/26/2009 | US20090288793 Method and arrangement for continuous cooking |
| 11/24/2009 | US7622018 Modernization of existing pulp towers either to allow the use of higher consistencies in the storage part thereof, or to allow the dilution to a lower consistency; for use in the wood processing industry for bleaching and/or storage of high-consistency pulp; efficiency, upgrading |
| 11/18/2009 | CN100560860C Process for vertically digesting bagasse pulp by anthraquinone sulfate process |
| 11/11/2009 | CN101575819A Measurement discharging device for cellular bin |
| 11/10/2009 | US7615134 Method and arrangement of impregnating chips |
| 10/28/2009 | CN101565915A Process for producing enhanced wood fiber sponge |
| 10/28/2009 | CN101565908A Under-pressure vertical digester and intermediate heating method for under-pressure vertical digester |
| 10/28/2009 | CN101565907A Bagasse alkaline pulping method by pre-extracting hemicellulose and product thereof |
| 10/28/2009 | CN101565906A Method for producing bamboo dissolving pulp by pre-extracting hemicellulose and product thereof |
| 10/22/2009 | WO2009108773A3 System and method for preextraction of hemicellulose through using a continuous prehydrolysis and steam explosion pretreatment process |
| 10/20/2009 | US7604712 Exposing wet fibres to light source covering range in visible region of 350-750 nm and range in near-infrared of 1100-2400 nm, reflecting light from wet fibres, establishing spectrum, comparing spectrum with known spectrum of property and evaluating comparison; utility in pulp manufacture line |
| 10/08/2009 | US20090250180 Method for Controlling a Pulping Process |
| 10/07/2009 | CN201321582Y Wall plate of closed air hood of paper machine |
| 10/07/2009 | CN201321581Y Safety unit for lifting door of closed air hood of paper machine |
| 10/07/2009 | CN201321580Y Lifting door of closed air hood of paper machine |
| 10/07/2009 | CN101549518A Manufacturing method of medium- and high-density flame-retardant fiber board |
| 10/06/2009 | CA2374796C Method and system for conveying shredded pulp to an ozone reactor |
| 10/01/2009 | WO2009120141A1 Digester vessel for a continuous digester |
| 09/30/2009 | CN101545226A Method for improving bagasse alkaline cooking effect through wet process with CEH bleaching waste liquor |
| 09/24/2009 | WO2009116946A1 Feeding system comprising parallel pumps for a continuous digester |
| 09/24/2009 | WO2009116943A1 Feeding system comprising parallel pumps for a continuous digester |
| 09/24/2009 | WO2009116942A1 Feeding system comprising parallel pumps and individual flows for a digester |
| 09/24/2009 | WO2009116941A1 Feeding system comprising pumps in parallel for a continuous digester |
| 09/24/2009 | WO2009116940A1 Feeding system comprising pumps in parallel for a continuous digester |
| 09/24/2009 | US20090236059 Digester wash extraction by individual screen flow control |
| 09/24/2009 | CA2715012A1 Feeding system comprising pumps in parallel for a continuous digester |
| 09/24/2009 | CA2715011A1 Feeding system comprising pumps in parallel for a continuous digester |
| 09/22/2009 | CA2417667C Gas phase continuous digester having an inverted top separator with liquor injection |
| 09/16/2009 | EP1751352B1 Tissue paper with protruding lotion deposits |
| 09/16/2009 | CN101532262A Screen plates having diagonal slots with curved inlets for a digester |