| Patents for D21C - Production of cellulose by removing non-cellulose substances from cellulose- containing materials; Regeneration of pulping liquors; Apparatus therefor (486) |
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| 08/26/2014 | US8815052 Method for separating lignin from a lignin containing liquid/slurry |
| 07/01/2014 | US8764936 Process for producing mechanical pulp suitable for paper or cardboard making |
| 12/31/2013 | CA2586338C A method and apparatus for processing wood chips |
| 10/22/2013 | CA2607178C Process for producing mechanical pulp suitable for paper or cardboard making |
| 10/01/2013 | CA2580834C Method for separating lignin from a lignin containing liquid/slurry |
| 08/27/2013 | US8518273 Method and device for cleaning of filter |
| 07/16/2013 | US8486224 Method for separating lignin from black liquor |
| 07/02/2013 | CA2578382C Method for separating lignin from black liquor |
| 02/12/2013 | CA2592887C Method for controlling a pulping process |
| 02/05/2013 | CA2578004C Apparatus and method for washing pulps |
| 12/05/2012 | CN101061272B A method and apparatus for processing wood chips |
| 11/06/2012 | CA2604782C An apparatus for distributing a pulp flow |
| 08/28/2012 | CA2543741C Arrangement in recovery boiler |
| 07/17/2012 | CA2508087C Method and system for feeding cellulose chips to a high pressure continuous cooking system |
| 07/10/2012 | CA2517612C An arrangement for adjusting rotor position in a rotating sluice |
| 06/27/2012 | EP1694909B1 Method and plant for handling a mixture of liquor and soap, and a plant for conversion of fibre material to pulp |
| 05/01/2012 | US8167133 Flotation cell |
| 02/01/2012 | EP1794363B1 Method for separating lignin from black liquor |
| 11/08/2011 | US8052839 Rotating surface on which a pulp web is formed; feed; discharge; remove filtrates; especially well suited for washing pulp; sulfate pulp industry; liquid removed; pulp washed after digestion and between and after bleaching stages; remarkable space saving; reduced number of apparatus; decrease expenses |
| 11/01/2011 | US8048270 Apparatus for distributing a pulp flow |
| 10/18/2011 | CA2465428C Top separator for gas phase and hydraulic phase continuous digesters and method for converting digester |
| 10/12/2011 | CN101305127B A new pulp and process for pulping |
| 09/21/2011 | CN101198746B 浮选室 Flotation chamber |
| 09/14/2011 | EP1747319B1 Method and device for washing of lime mud |
| 09/07/2011 | EP1789624B1 Method and arrangement for impregnation of chips |
| 08/16/2011 | US7998310 Method for impregnating chips |
| 08/09/2011 | US7992503 Cleaning device, cleaning tool and method of using the cleaning device |
| 07/14/2011 | US20110168345 Method of producing paper and cardboard |
| 07/05/2011 | US7971539 Cleaning device, cleaning tool and method of using the cleaning device |
| 06/21/2011 | CA2372069C Process for bleaching chemical pulps with low organic halogen compounds content |
| 06/16/2011 | US20110140317 Shielding arrangement for the smelt spout area of a recovery boiler |
| 06/15/2011 | EP1797236B1 Method for separating lignin from a lignin containing liquid/slurry |
| 05/11/2011 | CN101068977B Method and system for producing pulp |
| 03/08/2011 | US7901541 Method and arrangement for impregnating chips |
| 03/08/2011 | US7900567 Shielding arrangement for the smelt spout area of a recovery boiler |
| 02/02/2011 | CN101014738B Apparatus and method for washing pulps |
| 01/26/2011 | CN101171388B Process for producing mechanical pulp suitable for paper or cardboard making |
| 06/08/2010 | US7731818 bleaching with a peroxide compound in presence of an acrylic acid-maleic acid copolymer and a polylactone, treating with a non-ionic surfactant, a fatty acid surfactant; waste recycling; produce a low ash containing deinked pulp for producing high grade tissue and fine paper |
| 05/11/2010 | US7713382 Method and apparatus for processing wood chips |
| 03/30/2010 | US7686964 dewatering in pressurized filter, passing to kiln |
| 02/24/2010 | CN100591841C Process for deinking waste paper |
| 02/23/2010 | CA2455172C Feeding comminuted fibrous material using high pressure screw and centrifugal pumps |
| 02/09/2010 | US7658818 Method for converting a digester for use as a gas phase and hydraulic phase continuous digester |
| 01/14/2010 | US20100006245 Pulp and process for pulping |
| 10/08/2009 | US20090250180 Method for Controlling a Pulping Process |
| 09/22/2009 | US7591988 Method for processing flue gases |
| 09/15/2009 | US7587994 Arrangement in recovery boiler |
| 07/07/2009 | US7556713 Method and system for feeding cellulose chips to a high pressure continuous cooking system |
| 05/07/2009 | US20090118452 Method to Decompose the Natural Structure of Biomass |
| 04/30/2009 | US20090107642 Method for oxygen delignification of cellulose pulp at high pressure in several steps |
| 04/09/2009 | US20090089947 Cleaning device, cleaning tool and method of using the cleaning device |
| 04/07/2009 | CA2431389C Process for producing dried singulated cellulose pulp fibers using a jet drier and injected steam and the product resulting therefrom |
| 04/02/2009 | US20090084511 Method and Apparatus for Processing Wood Chips |
| 03/19/2009 | US20090071619 Apparatus for distributing a pulp flow |
| 03/10/2009 | US7501042 Smelt is removed from the boiler via a smelt spout surrounded outside the boiler by a hood and a dispersion medium, preferably steam, is fed into the smelt flow falling from the smelt spout for shattering the smelt flow; wall of the hood is washed with liquid |
| 02/05/2009 | US20090032207 Process for Producing Mechanical Pulp Suitable for Paper or Cardboard Making |
| 01/13/2009 | US7475645 Retractable liquor gun holder for a recovery furnace |
| 01/07/2009 | CN101341288A Process for producing chemi-mechanical pulp |
| 12/16/2008 | CA2520226C High ph treatment of pulp in a bleach sequence to produce pulp having low d.p. and low copper number for use in lyocell manufacture |
| 12/04/2008 | US20080295986 Method of Producing Paper and Cardboard |
| 12/02/2008 | US7459058 Feed of a mixture of chips and fluid from a low-pressure system to a high-pressure system |
| 11/18/2008 | CA2520236C Low ph treatment of pulp in a bleach sequence to produce pulp having low d.p. and low copper number for use in lyocell manufacture |
| 11/13/2008 | US20080277081 Method and Arrangement For Impregnation of Chips |
| 11/12/2008 | CN101305127A A new pulp and process for pulping |
| 11/06/2008 | US20080271861 Method for Oxygen Delignification of Cellulose Pulp by Mixing of Chemicals |
| 10/30/2008 | US20080264585 providing an aqueous pulp suspension containing recycled fibers, printing ink and CaCO3; stabilizing the hardness of pulp suspension by causing dissolution of CaCO3 by mixing a weak acid ( citric acid, acetic acid, formic acid, H3PO4 ), subjecting the suspension to flotation to separate printing ink |
| 10/28/2008 | CA2480891C Pulp flaker |
| 10/28/2008 | CA2431301C A system for producing dried singulated cellulose pulp fibers using a jet drier and injected steam |
| 10/14/2008 | US7434543 Arrangement in recovery boiler |
| 10/08/2008 | CN101283143A Method to decompose the natural structure of biomass |
| 09/11/2008 | DE112006002685T5 Diffusor für einen Injektor in einer Flotationszelle und Verfahren zum Zuführen einer Fasersuspension in die Flotationszelle A diffuser of an injector in a flotation cell and method of feeding a fiber suspension in the flotation cell |
| 09/04/2008 | US20080211119 Flotation Cell |
| 08/21/2008 | US20080196848 Rotating surface on which a pulp web is formed; feed; discharge; remove filtrates; especially well suited for washing pulp; sulfate pulp industry; liquid removed; pulp washed after digestion and between and after bleaching stages; remarkable space saving; reduced number of apparatus; decrease expenses |
| 08/20/2008 | EP1957709A1 Method of producing paper and cardboard |
| 08/13/2008 | EP1954872A1 A new pulp and process for pulping |
| 07/16/2008 | CN101223315A Process for deinking recycled fibers and use of an acid in deinking |
| 07/08/2008 | CA2318027C Treating pulp with yield or strength-enhancing additive |
| 07/01/2008 | US7392751 Port rodder with velocity damper |
| 06/11/2008 | CN101198746A 浮选室 Flotation chamber |
| 04/30/2008 | CN101171388A Process for producing mechanical pulp suitable for paper or cardboard making |
| 04/29/2008 | CA2448862C Method for separating hemicelluloses from a biomass containing hemicelluloses |
| 04/24/2008 | US20080093041 For cellulose pulps; improved impregnation obtained by addition of fluids with increasing temperatures at different heights, and by establishing counter-flow zone in uppermost part of vessel |
| 04/23/2008 | EP1913198A1 Method to decompose the natural structure of biomass |
| 04/17/2008 | DE112006001002T5 Verfahren zur Herstellung mechanischen Zellstoffs, der zur Herstellung von Papier oder Pappe geeignet ist A process for producing mechanical pulp suitable for making paper or paperboard |
| 04/01/2008 | US7350674 Arrangement for adjusting rotor position in a roting sluice |
| 02/28/2008 | US20080051566 Method For Separating Lignin From A Lignin Containing Liquid/Slurry |
| 02/28/2008 | US20080047674 Method for Separating Lignin from Black Liquor |
| 02/27/2008 | EP1891264A1 Flotation cell |
| 02/13/2008 | EP1885942A1 An apparatus for distruibuting a pulp flow |
| 02/13/2008 | EP1885941A1 Process for deinking recycled fibers and use of an acid in deinking |
| 01/23/2008 | EP1759053B1 Process for deinking waste paper |
| 01/03/2008 | US20080001011 Pulp flaker |
| 12/18/2007 | US7309401 Top separator for gas phase and hydraulic phase continuous digesters and method for converting digester |
| 11/08/2007 | US20070256801 Alkaline Process and System for Producing Pulp |
| 11/07/2007 | CN101068977A Alkaline process and system for producing pulp |
| 11/06/2007 | US7291244 Pulp flaker |
| 11/01/2007 | US20070251891 Method and Device for Cleaning of Filter |
| 10/25/2007 | US20070246175 Process for Deinking Waste Paper |
| 10/24/2007 | EP1846614A1 Method for controlling a pulping process |
| 10/24/2007 | CN101061272A A method and apparatus for processing wood chips |