| Patents for D21C 7 - Digesters (1,988) |
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| 10/08/2008 | CN100424260C Mechanical cold method for making paper pulp |
| 10/01/2008 | CN101275374A Pulp cleaning agent, pulp manufacturing method and pulp cleaning method |
| 10/01/2008 | CN101275371A Non-chemical steaming semi-mechanical pulping paper making process and apparatus therefor |
| 10/01/2008 | CN101275370A Application of decoction dregs as pulping raw material of paper making |
| 09/24/2008 | CN101270556A Multifunctional integrated pulping equipment of high-concentration boiling and bleaching |
| 09/24/2008 | CN101269510A Manufacturing technique for whitening type middle, high-density pressed-fibre board |
| 09/17/2008 | EP1969176A1 Method for controlling a process for the production of short-fibred cellulose pulp |
| 09/17/2008 | CN101265675A Environment friendly-type amortizing packaging material and method for making same |
| 09/17/2008 | CN101265608A Bleaching and heating process and bleaching heating equipment in cellulose viscose pulp production |
| 09/16/2008 | CA2225740C Continuous digester |
| 09/10/2008 | CN101260635A PPDM extraction method for agriculture waste straw fibre |
| 09/09/2008 | US7422657 Feeding from a low pressure to a high-pressure system through a sluice feeder having a rotor with through-pockets that are alternately connected with low or the high pressure system; fluid expelled from the pockets in first postion is used to expel chips from the pockets in the second position |
| 08/28/2008 | WO2008103124A1 Vapour phase digester and a method for continuous cooking |
| 08/28/2008 | US20080202717 Arrangement for Feeding a Slurry of Chips and Liquid |
| 08/28/2008 | US20080202713 reducing volatile organic compound (VOC) emissions generated during refining cellulose fibers, by transporting a mixture of fibers and steam containing VOC's into a steam separator, then discharging cleaned fibers, mixing with a phenol-formaldehyde resin and drying the mixture |
| 08/28/2008 | US20080202712 Method and Device for the Continuous Cooking of Pulp |
| 08/27/2008 | CN101250831A Method for producing cattle manure paper-pulp using cattle manure as raw material |
| 08/20/2008 | EP1957708A1 Method and device for the continuous cooking of pulp |
| 08/06/2008 | CN101235607A Method for producing natural antibacterial bamboo fiber |
| 07/30/2008 | CN201092633Y Steaming ball feeding apparatus for pulping |
| 07/30/2008 | CN101230550A Method for making pulp by secondary water cyclic utilization of boiling waste fluid, waste vapour and lignin |
| 07/30/2008 | CN100406646C Prepared high hardness pulp using grass kind plant as raw material and preparation method thereof |
| 07/23/2008 | CN101225620A Method for preparing high-whiteness chemical pulp and paper products thereof by using corn stalk |
| 07/23/2008 | CN101225614A Paper-making technique employing bio-fermentation pulping method instead of chemical pulping technique |
| 07/17/2008 | US20080169071 Continuous/batch processing; multizonal |
| 07/16/2008 | CN201087307Y Spherical digester spraying and discharging device for pulping |
| 07/16/2008 | CN101220565A Pulping method with zero discharge of sewage water |
| 07/16/2008 | CN100402745C Prepared bleach chemical pulp using grass kind plant as raw material and preparation method thereof |
| 07/09/2008 | CN101215801A Method for preparing high permeating degree fruit cultivating bag paper and products thereof |
| 07/09/2008 | CN101215795A Sulfuric acid catalysis ethanol pulp preparing technique for ryegrass |
| 07/09/2008 | CN101215794A Zero residual base normal-pressure or low-pressure boiling high-concentration pulp preparing method by using base process |
| 07/08/2008 | CA2318027C Treating pulp with yield or strength-enhancing additive |
| 06/24/2008 | US7390669 Simultaneous and rapid determination of multiple component concentrations in a Kraft liquor process stream |
| 06/18/2008 | EP1932967A2 A method for producing cellulose pulp in a continuous digester in an energy-efficient manner |
| 06/17/2008 | US7387708 Process for feeding pulp into a blow tank or storage tank |
| 06/11/2008 | EP1929085A1 Feeder |
| 06/03/2008 | US7381303 System and method for controlling a thermo-mechanical wood pulp refiner |
| 06/03/2008 | US7381302 Method and arrangement for impregnating chips |
| 05/28/2008 | CN101187181A Alkaline method for zero-residual alkaline boiling pulp making method |
| 05/14/2008 | CN101177921A Continuous pulping method for cotton stalk natural color chemomechanical pulp |
| 05/06/2008 | US7368037 Refiner steam separation system for reduction of dryer emissions |
| 04/29/2008 | US7364640 Prepulping; refining; filtration; dehydration; adjustment of pH; separation |
| 04/23/2008 | CN101165267A Pulping technique for straw fibre |
| 04/16/2008 | CN101163832A Arrangement for feeding a slurry of chips and liquid |
| 04/16/2008 | CN101161927A Method for preparing straw pulp with high yield by oxidation kneading and equipment used therefor |
| 04/09/2008 | CN101158125A Paper-making grade softwood pulp plate modifying production technique |
| 04/09/2008 | CN101158124A Paper-making grade pulp bleaching plate modifying production technique |
| 04/09/2008 | CN101158123A High-strength bamboo pulp manufacturing technique |
| 04/09/2008 | CN101158122A Bamboo dissolved pulp manufacturing technique |
| 04/09/2008 | CN101158121A Process for manufacturing dissolved pulp by using ethanol, sulfate and acetic acid |
| 04/01/2008 | US7351305 Method and a digester for the continuous cooking of wood raw material to cellulose pulp |
| 04/01/2008 | US7350674 Arrangement for adjusting rotor position in a roting sluice |
| 03/26/2008 | CN101148837A Paper-making-stage primary color wood pulp plate denaturalization producing technique |
| 03/26/2008 | CN101148836A Paper-making-stage bamboo wood pulp plate denaturalization producing technique |
| 03/26/2008 | CN101148835A Paper-making-stage wood pulp plate denaturalization producing technique |
| 03/26/2008 | CN101148834A Paper-making-stage broad-leaved wood pulp plate denaturalization producing technique |
| 03/26/2008 | CN101148833A Paper-making-stage reclaiming wood pulp plate denaturalization producing technique |
| 03/26/2008 | CN101148832A Paper-making-stage high viscosity wood pulp plate denaturalization producing technique |
| 03/20/2008 | US20080066883 Paper pulp pre-processor |
| 03/13/2008 | WO2008028771A1 A method and apparatus for filling and cleaning a pulp tower |
| 03/13/2008 | CA2662731A1 A method and apparatus for filling and cleaning a pulp tower |
| 03/05/2008 | CN101135119A Method for manufacturing pulp raw material by biofermentation and culture method for the bacterial |
| 02/27/2008 | CN101133315A Method for determining chemical pulp kappa number with visible-near infrared spectrometry |
| 02/27/2008 | CN101130937A Hemp paper-pulp and preparing method thereof |
| 02/14/2008 | WO2008019228A2 Moving bed biomass fractionation system and method |
| 02/13/2008 | EP1885942A1 An apparatus for distruibuting a pulp flow |
| 02/13/2008 | CN101122101A Processes and systems for the pulping of lignocellulosic materials |
| 02/07/2008 | US20080029233 Moving bed biomass fractionation system and method |
| 02/06/2008 | CN101117779A Method of mechanical pulp making by using cotton pole |
| 01/30/2008 | CN100365202C Instantaneously heating and fast cooling set for cellulose |
| 01/16/2008 | EP1878827A2 Implementation of dissolved solids profiling |
| 01/16/2008 | CN201006965Y Cellulose continuous bulking machine |
| 01/15/2008 | US7318880 Method for defibring recycled fiber material in a drum pulper, and a drum pulper |
| 01/09/2008 | EP0826086B2 Method for heating and pressuring a fibre pulp suspension during transportation to a bleaching reactor |
| 01/09/2008 | CN101100820A Method for producing Chinese red pine chemical pulp |
| 01/09/2008 | CN101100818A Pulping technique for straw fibre |
| 01/02/2008 | EP1873303A2 Dissolved solids control in pulp production |
| 01/01/2008 | US7314538 Energy efficiency; compaction of wood chips using plug screw |
| 12/26/2007 | EP1869250A1 Arrangement for feeding a slurry of chips and liquid |
| 12/19/2007 | CN101089291A Prepared bleach chemical pulp using grass kind plant as raw material and preparation method thereof |
| 12/19/2007 | CN101089290A Prepared high hardness pulp using grass kind plant as raw material and preparation method thereof |
| 12/18/2007 | US7309401 Top separator for gas phase and hydraulic phase continuous digesters and method for converting digester |
| 12/18/2007 | CA2271221C Determination of ionic species concentration by near infrared spectroscopy |
| 11/27/2007 | CA2317750C Feeding system in connection with the continuous cooking of cellulose containing material |
| 11/21/2007 | CN101076632A Dual zone wireless pulp washer |
| 11/13/2007 | US7294227 Method and system for the treatment of pulp prior to ozone bleaching |
| 10/31/2007 | CN101063277A Processing technique for sectional type preparing sitallization cellulose with high-temperature high pressure |
| 10/24/2007 | EP1846614A1 Method for controlling a pulping process |
| 10/24/2007 | CN101058958A Method of preparing high-strength corrugated paper |
| 10/24/2007 | CN101058953A Method of preparing bleaching dissolved pulp from corn stem |
| 10/24/2007 | CN101058951A Method of producing fir chemical pulp |
| 10/23/2007 | US7285179 Cooking; reducing wood to liquid ratios; multistage; adjusting alakli concentration; extraction cycles |
| 10/18/2007 | WO2007117203A1 A method and a device for discharging pulp from a pulp tower |
| 10/18/2007 | WO2006093581A3 Virtual hand sheet method and system for estimating paper properties |
| 10/17/2007 | CN101054777A Hardwood alkaline pulping processes and systems |
| 10/13/2007 | CA2581993A1 Hardwood alkaline pulping processes and systems |
| 10/09/2007 | US7279070 Method for the continuous cooking of wood raw material for cellulose pulp |
| 10/04/2007 | US20070227681 Apparatus for decreasing scaling in digester systems |
| 09/26/2007 | CN200952096Y Wheat grass pulping rotary spherical digester feeding device |
| 09/26/2007 | CN200952095Y Non-rubber cushion seal rotary spherical digester |