| Patents for D21C 7 - Digesters (1,988) |
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| 09/16/2009 | CN101532260A Method for pulping by cooking solid base in plant fiber |
| 09/12/2009 | CA2658214A1 Face mounted installation fixture and associated methods |
| 09/03/2009 | WO2009108773A2 System and method for preextraction of hemicellulose through using a continuous prehydrolysis and steam explosion pretreatment process |
| 09/03/2009 | CA2715592A1 System and method for preextraction of hemicellulose through using a continuous prehydrolysis and steam explosion pretreatment process |
| 08/19/2009 | CN101512067A A method and apparatus for filling and cleaning a pulp tower. |
| 08/19/2009 | CN100529251C Method for producing paper pulp utilizing herbal plant, crop stalk and ore powder |
| 08/05/2009 | EP2085509A2 Method for measuring and controlling digester or impregnation vessel chip level by means of measuring chip pressure |
| 08/05/2009 | CN201284443Y High-pressure multi-tube continuous steaming combined paste mill |
| 07/30/2009 | CA2635309A1 Method and sytem for measuring and controlling digester or impregnation vessel chip level by measuring chip pressure |
| 07/29/2009 | EP1784534B1 Screen assembly for a pulp digester |
| 07/07/2009 | US7556713 Method and system for feeding cellulose chips to a high pressure continuous cooking system |
| 06/10/2009 | CN201254672Y Paper pulp steaming and washing energy-conserving device |
| 06/04/2009 | WO2009070115A1 Digester screen for a continuous cellulose pulp digester |
| 06/04/2009 | US20090141963 Method and apparatus for measuring deposition of particulate contaminants in pulp and paper slurries |
| 06/04/2009 | US20090139671 Arrangement and method for the continuous steam pre-treatment of chips during the production of cellulose pulp |
| 06/04/2009 | CA2705574A1 Digester screen for a continuous cellulose pulp digester |
| 06/03/2009 | EP2064387A1 A method and apparatus for filling and cleaning a pulp tower |
| 06/02/2009 | US7540937 Method for continuous cooking |
| 05/27/2009 | CN201245792Y Multifunctional reactor for preparing paper pulp |
| 05/27/2009 | CN101440582A Treatment vessel for straw or other light bulky material |
| 05/20/2009 | CN101435175A Method for simultaneously producing sanitary napkin, pesticides farming fertilizer and anti-staling agent by agriculture and forestry appurtenance |
| 05/20/2009 | CN101435168A Method and system for direct contact of high temperature liquid and wood chips in flow circuilation |
| 05/20/2009 | CN101435164A Modified production process of paper making level sulphate wood pulp plate |
| 05/20/2009 | CN100489190C Method for producing black liquid by intraball cleaning stepwise cooking technology |
| 05/19/2009 | CA2357864C Process for continuous cooking of pulp |
| 05/13/2009 | EP1272705B1 Method for controlling the cooking temperature in a continuous vapour phase digester |
| 05/13/2009 | CN101429733A Bamboo wood dissolving pulp manufacturing process |
| 05/07/2009 | US20090118477 Continuous counter-current organosolv processing of lignocellulosic feedstocks |
| 05/01/2009 | CA2642312A1 Monitoring and adjustment system and method for a high pressure feeder in a cellulose chip feeding system for a continuous digester |
| 04/30/2009 | WO2009053530A1 A pulp container and a method for discharging pulp from a pulp container |
| 04/28/2009 | CA2373490C Method for avoiding mechanical damage of pulp |
| 04/22/2009 | CN201225176Y Waste heat power generation apparatus of CO2 working substance paper mill |
| 04/16/2009 | US20090095430 Treatment vessel for straw or other light bulky material |
| 04/15/2009 | EP2048281A1 Treatment vessel for straw or other light bulky material |
| 04/15/2009 | CN101408007A Two vessel reactor system and method for hydrolysis and digestion of wood chips with chemical enhanced wash method |
| 04/14/2009 | CA2259109C Kraft pulping process |
| 04/09/2009 | WO2009046283A1 Apparatus and methods for treating biomass |
| 04/09/2009 | US20090090477 Feeder |
| 04/08/2009 | EP1434674B1 Device and method for vacuum impregnation |
| 04/02/2009 | US20090084511 Method and Apparatus for Processing Wood Chips |
| 03/26/2009 | WO2009037091A1 An apparatus for discharging pulp from a vessel, method of discharging pulp form a vessel and method of upgrading a pulp vessel |
| 03/26/2009 | US20090078382 Arrangement and Method for Treatment of Cellulose Pulp Involving Means for Seal Adjustment |
| 03/25/2009 | CN101392468A Square cone bottom spraying pot |
| 03/19/2009 | US20090071615 improved design for cooling, dilution and washing at the bottom of a continuous digester for the production of cellulose pulp; arranging at least one extra strainer section above the lowermost strainer section; space for the increase of production; improvement of the flow of the column of chips |
| 03/18/2009 | CN101387087A Method and system for semi-chemical pulping |
| 03/18/2009 | CN101387085A Single vessel reactor system for hydrolysis and digestion of wood chips with chemical enhanced wash method |
| 03/12/2009 | US20090065158 Installation for implementing a method for producing paper pulp, lignins and sugars and production method using such an installation |
| 03/11/2009 | CN101381970A Method for co-producing paper pulp and fuel ethanol by wild grass on forest land |
| 03/05/2009 | US20090056890 Digester wash extraction by individual screen flow control |
| 03/03/2009 | US7497927 Continuous digester with fluid circulation |
| 02/17/2009 | US7491296 Multi-stage screening apparatus, screen basket and method for screening pulp suspensions |
| 02/12/2009 | US20090038767 Method and System for Semi-Chemical Pulping |
| 02/07/2009 | CA2638196A1 Method and system for semi-chemical pulping |
| 01/28/2009 | CN101353875A Hand tissue made from grass pulp and preparation thereof |
| 01/28/2009 | CN101353874A Offset printing paper made from grass pulp and preparation thereof |
| 01/28/2009 | CN101353873A Food wrapping paper made from grass pulp and preparation thereof |
| 01/28/2009 | CN101353872A Duplicating paper made from grass pulp and preparation thereof |
| 01/28/2009 | CN101353871A Natural color wiping paper and preparation thereof |
| 01/28/2009 | CN101353868A Alkaline process cooking method for preparing high-hardness pulp from gramineae plants |
| 01/28/2009 | CN101352324A Sanitary paper prepared by cereal straw pulp and preparation method thereof |
| 01/28/2009 | CN101352296A Cutlery box produced by cereal straw pulp and preparation method thereof |
| 01/21/2009 | EP2017382A2 Impregnation vessel with convergence side relief and method for heat injection at convergence |
| 01/21/2009 | CN101349025A Impregnation vessel with convergence side relief and method for heat injection at convergence |
| 01/15/2009 | WO2009008288A1 Mechanical seal device |
| 01/14/2009 | EP2014827A2 Single vessel reactor system for hydrolysis and digestion of wood chips with chemical enhanced wash method |
| 01/14/2009 | EP1664421A4 Chemimechanical desilication of nonwood plant materials |
| 01/14/2009 | CN201180167Y Bleaching and heating device for viscose fiber pulp production |
| 01/08/2009 | WO2009005441A1 Plug screw feeder for feeding cellulose pulp/chips |
| 01/08/2009 | CA2688323A1 Plug screw feeder for feeding cellulose pulp/chips |
| 01/07/2009 | CN101338529A High-pressure multi-tube continuous digester combined pulp grinder |
| 12/31/2008 | WO2009001577A1 Paper stock preparing apparatus using palm/coconut as raw material |
| 12/31/2008 | CN201172771Y Slurry tank device for washing material under double globe digesters |
| 12/30/2008 | US7470347 Device and method withdrawing cellulose pulp from a container |
| 12/25/2008 | US20080314534 Method and system for direct contact of hot liquor with wood chips in transfer circulation |
| 12/25/2008 | CA2599773A1 Method and system for direct contact of hot liquor with wood chips in transfer circulation |
| 12/24/2008 | CN100445463C Method of preparing pulp by anaerobic fermenting Spartina alterniflora and cooking soda, anthraquinone and fermented Spartina alterniflora |
| 12/17/2008 | EP2003241A2 Two vessel reactor system and method for hydrolysis and digestion of wood chips with chemical enhanced wash method |
| 12/11/2008 | US20080302492 Two vessel reactor system and method for hydrolysis and digestion of wood chips with chemical enhanced wash method |
| 12/10/2008 | CN101319472A Plant fiber raw material reaction warehouse |
| 12/10/2008 | CN100441773C Method of ultrasound in use for producing purified pulp |
| 12/10/2008 | CN100441772C Production technology of thermomechanical bamboo pulp |
| 12/04/2008 | US20080295981 Single vessel reactor system for hydrolysis and digestion of wood chips with chemical enhanced wash method |
| 12/04/2008 | US20080295980 Continuous counter-current organosolv processing of lignocellulosic feedstocks |
| 12/03/2008 | CN101314924A Pulping paper-making process with zero discharge of sewage water |
| 12/02/2008 | US7459058 Feed of a mixture of chips and fluid from a low-pressure system to a high-pressure system |
| 11/25/2008 | US7455749 Vaporization; slurrying; for producing chemical cellulose pulp from cellulose chips |
| 11/18/2008 | US7452444 total volume of liquor withdrawn from the digester through the wash screens within the wash zone of the digester is uniformly and automatically distributed between all of the wash screens |
| 11/13/2008 | US20080277083 Method of monitoring and inhibiting scale deposition in pulp mill evaporators and concentrators |
| 11/13/2008 | DE102004010196B4 Vorrichtung zum Austragen von lignozellulosem Rohmaterial aus einem Kocher und zur Förderung des Rohmaterials zu einem Refiner Device for the removal of lignocellulosic raw material from a boiler and the promotion of the raw material to a refiner |
| 11/12/2008 | CN101302728A Sisal hemp pulp and preparation thereof |
| 11/12/2008 | CN101302725A Process for producing cotton dissolving pulp |
| 11/06/2008 | US20080271860 Method and apparatus to distribute the inflow of liquors in batch digester |
| 10/23/2008 | US20080257511 Outlet device for a pressurized vessel having a combined radial bearing and hydraulic drive motor |
| 10/22/2008 | CN101289818A Process for preparing dissolved pulp by oxidative degradation of linters |
| 10/16/2008 | WO2008019228A3 Moving bed biomass fractionation system and method |
| 10/15/2008 | CN201132910Y Novel screw conveyer |
| 10/15/2008 | CN101284393A Medium-density fiberboard production waste drainage closed cycle loop back technique |
| 10/09/2008 | US20080245496 Apparatus and process for digesting cellulosic material |
| 10/08/2008 | CN201128839Y High-temperature energy-saving cycle steam vessel device |
| 10/08/2008 | CN201128838Y Vertical type steaming tower |