| Patents for D21C 1 - Pretreatment of the finely-divided materials before digesting (1,872) |
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| 05/21/2008 | CN101184889A Production of pulp using a gaseous organic agent as heating and reaction-accelerating media |
| 05/14/2008 | CN101180432A Modified kraft fibers |
| 05/14/2008 | CN101177921A Continuous pulping method for cotton stalk natural color chemomechanical pulp |
| 04/30/2008 | CN101168935A Technique for producing white paper from cotton straw |
| 04/29/2008 | US7364640 Prepulping; refining; filtration; dehydration; adjustment of pH; separation |
| 04/24/2008 | WO2008048426A2 Modified kraft fibers |
| 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 |
| 04/24/2008 | CA2818902A1 Modified kraft fibers |
| 04/24/2008 | CA2666707A1 Modified kraft fibers |
| 04/23/2008 | CN101165267A Pulping technique for straw fibre |
| 04/17/2008 | US20080087392 Vacuum Washer Drum |
| 04/16/2008 | CN101161927A Method for preparing straw pulp with high yield by oxidation kneading and equipment used therefor |
| 04/16/2008 | CN100381635C Method of preparing bleached chemical pulp using cotton stalk |
| 04/09/2008 | CN101160431A Method for separating the main components of lignocellulosic materials |
| 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 |
| 04/03/2008 | US20080078516 Composite panels, pulp, paper; conventional pulping processes, produce a high tensile strength pulp, lighter color than wood pulp, and uses less bleaching chemicals to achieve a desired whiteness; can be combined with wood pulp to produce a variety of products |
| 04/01/2008 | US7351764 Methods to enhance brightness of pulp and optimize use of bleaching chemicals |
| 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 |
| 03/26/2008 | CN101148829A Bamboo shoot shell treatment technique for dinnerware and method for producing dinnerware from bamboo shoot shell |
| 03/06/2008 | WO2008028183A1 Method of making medium density fiberboard |
| 03/06/2008 | WO2008026932A1 Method and device for thermal enzymatic hydrolysis of ligno cellulose |
| 03/06/2008 | US20080053632 improve the effectiveness of transporting of tissue paper web; guide element has suction openings communicating with the first negative-pressure zone; papermaking apparatus |
| 03/06/2008 | CA2661852A1 Method and device for thermal enzymatic hydrolysis of ligno cellulose |
| 03/05/2008 | CN100373001C Pulping technique for fibers in grass class |
| 02/27/2008 | CN101130937A Hemp paper-pulp and preparing method thereof |
| 02/13/2008 | EP1885864A1 Method of continuous processing of lignocellulosic feedstocks |
| 02/10/2008 | CA2596796A1 Processes and systems for the pulping of lignocellulosic materials |
| 02/06/2008 | EP1883731A2 Modified kraft fibers |
| 01/30/2008 | CN100365199C Method for making pulp using cow dung as raw material |
| 01/30/2008 | CN100365198C Process for enzyme treating before pulping by plant fibre raw material |
| 01/29/2008 | CA2253301C Hydrogen sulphide pretreatment of lignocellulosic material in continuous pulping processes |
| 01/24/2008 | DE102007003964A1 Wood-pulping equipment for paper- or card manufacture, employs compression refiner to complete fiber hydration and separation without damage |
| 01/09/2008 | EP1874997A1 Production of pulp using a gaseous organic agent as heating and reaction-accelerating media |
| 01/09/2008 | EP1874995A1 Method for separating the main components of lignocellulosic materials |
| 01/09/2008 | CN101100818A Pulping technique for straw fibre |
| 01/02/2008 | CN100359094C Method of deresinating pulp using alkyl alcohol alkoxylate surfactants |
| 12/26/2007 | CN100357517C Pretreatment liquid of cotton rod boiling |
| 12/25/2007 | US7311270 Device and methodology for improved mixing of liquids and solids |
| 12/18/2007 | US7309401 Top separator for gas phase and hydraulic phase continuous digesters and method for converting digester |
| 12/13/2007 | DE102006027102A1 Paper- or carton-processing machine has main frame incorporating struts whose natural resonant frequency is altered by hydraulic or pneumatic action |
| 12/11/2007 | US7306698 Method for producing pulp |
| 12/05/2007 | EP1861506A2 Cellulases, nucleic acids encoding them and methods for making and using them |
| 12/04/2007 | US7303649 Reduced concentration of inorganic compounds before cooking pulp; removing entrained air by aqueous leaching under heating, pressurization |
| 11/29/2007 | CA2651483A1 Methods for carbonate pretreatment and pulping of cellulosic material |
| 11/20/2007 | US7297225 Process for high temperature peroxide bleaching of pulp with cool discharge |
| 11/13/2007 | US7294228 Biopulp for non-woody fiber plants and biopulping method thereof |
| 11/08/2007 | US20070256801 Alkaline Process and System for Producing Pulp |
| 11/07/2007 | CN101068977A Alkaline process and system for producing pulp |
| 11/07/2007 | CN101067284A Paper pulp making technology by biological catalytic cracking method |
| 10/31/2007 | CN101063278A Method for hybrid giant napier producing in oxygen free radical doffing/bleaching integrated reactor with dried bananas stalk |
| 10/31/2007 | CN101063276A Method for hybrid giant napier producing in oxygen free radical doffing/bleaching integrated reactor with albefaction paper stuff |
| 10/31/2007 | CN101063275A Process for preparation of rice paper burning-grass pulp |
| 10/25/2007 | DE202007007038U1 Vorrichtung zum Entwässern von schütt- oder fließfähigem Aufgabegut durch Verdichtung Apparatus for dewatering pourable or flowable feed by compaction |
| 10/24/2007 | CN101061272A A method and apparatus for processing wood chips |
| 10/24/2007 | CN101058953A Method of preparing bleaching dissolved pulp from corn stem |
| 10/24/2007 | CN101058952A Preparation of bamboo protofibre for weave by biological enzyme |
| 10/18/2007 | US20070240837 Hardwood alkaline pulping processes and systems |
| 10/17/2007 | CN100342985C Method for adjusting the fibrous properties of pulp |
| 10/11/2007 | US20070237026 Methodology for improved mixing of a solid-liquid slurry |
| 10/04/2007 | US20070227682 Method and a Device for Removing Gas from Wood Chips |
| 10/04/2007 | CA2856978A1 Cellulose-solvent-based lignocellulose fractionation with modest reaction conditions and reagent cycling |
| 10/03/2007 | EP1552052B1 A method of producing mechanical pulp and the mechanical pulp thus produced |
| 09/19/2007 | EP1834033A1 A method and apparatus for processing wood chips |
| 09/18/2007 | US7270725 Pretreatment of chips with white liquor prior to a treatment with black liquor |
| 09/13/2007 | WO2006101584A3 Cellulases, nucleic acids encoding them and methods for making and using them |
| 09/11/2007 | CA2170924C Method and arrangement in cooling medium circulation of a recovery boiler |
| 08/22/2007 | EP1820897A1 Method of manufacturing pulp and articles made therefrom |
| 08/22/2007 | CN101021050A Process of cow dung paper pulp with cow dung as material |
| 08/22/2007 | CN101021049A Cow dung paper pulp produced with cow dung as material |
| 08/16/2007 | WO2007090926A1 Method for recovering hydrolysis products |
| 08/16/2007 | WO2007090925A1 Method for recovering hydrolysis products |
| 08/16/2007 | US20070187053 Cellulose pulp; pressurization, heating in fluid filled zone |
| 08/16/2007 | CA2641686A1 Method for recovering hydrolysis products |
| 08/15/2007 | EP1818445A2 A method for impregnating chips in a continuous digestion system |
| 08/14/2007 | US7256030 For use in the detergent, paper and pulp, oil drilling, oil extraction, wine and juice, food ingredients, animal feed or textile industries |
| 08/02/2007 | WO2007005918A3 Production of cellulase |
| 08/01/2007 | CN101008160A Method for producing paper pulp utilizing herbal plant, crop stalk and ore powder |
| 07/11/2007 | CN1997791A Method for mechanical pulp production |
| 07/11/2007 | CN1995539A Manual paper and its preparing process and use thereof |
| 07/11/2007 | CN1325723C Wood method for pulping using cotton stalk, bush or brush |
| 07/05/2007 | US20070151691 Method for converting a digester for use as a gas phase and hydraulic phase continuous digester |
| 07/04/2007 | CN1324191C Highly pare lignin, hihg efficiency fiber separating technology |
| 07/03/2007 | CA2287602C Biological method of deinking printed wastepaper |
| 06/28/2007 | WO2007073333A1 System and method for the generation of steam from hot black liquor in a digester plant |
| 06/28/2007 | WO2007071187A1 A method for making paper pulp by reacting hydrogen peroxide and alkali substance |
| 06/27/2007 | EP1799364A1 Method for manufacturing pulp from classified wood material |
| 06/20/2007 | EP1797235A1 Improved alkaline process and system for producing pulp |
| 06/13/2007 | CN1980953A Polypeptides having cellulolytic enhancing activity and polynucleotides encoding same |
| 06/12/2007 | US7229526 Method and apparatus for the feeding of fibers |
| 06/12/2007 | US7229524 Feeding arrangement for feeding of chips to chip bins |
| 06/07/2007 | WO2007064296A1 A system and a method for the steam pre-treatment of chips in association with the production of chemical cellulose pulp |