| Patents for D21C 3 - Pulping cellulose-containing materials (5,020) |
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| 03/13/2002 | CN1340121A Process for oxygen pulping of lignocellulosic material and recovery of pulping chemicals |
| 03/07/2002 | US20020026991 Impregnating the material with a solution containing yield or strength-enhancing additive so that no degradation or hydrolysis occurs; treating material with an alkaline cooking liquor produce a chemical cellulose pulp |
| 03/07/2002 | US20020026990 Method and apparatus for pulping sawdust |
| 02/28/2002 | WO2002016690A1 Process-control method during the production of cellulose |
| 02/26/2002 | US6350348 Batch cooking with black liquor pretreatment |
| 02/21/2002 | WO2002014598A1 Cellulose production from lignocellulosic biomass |
| 02/20/2002 | EP1180171A1 Method for producing paper pulp, lignins, sugars and acetic acid by fractionation of lignocellulosic vegetable material in formic/acetic acid medium |
| 02/19/2002 | US6348128 Method of increasing the causticizing efficiency of alkaline pulping liquor by borate addition |
| 02/19/2002 | US6348127 Pulping densified cubes or pellets, for making paper and other fibrous products; kenaf |
| 02/14/2002 | US20020017370 Pretreatment of chips before cooking |
| 02/13/2002 | CN1335427A Method of utilizing black pulp liquor resource |
| 02/12/2002 | US6346407 Xylanase, microorganisms producing it, DNA molecules, methods for preparing this xylanase and uses of the latter |
| 02/12/2002 | US6346167 Kraft cooking communited cellulose fibers at high rate by controlling effective dissolved lignin concentration of the cooking liquor; kraft pulp of increased strength, bleachability that uses less effective alkali |
| 02/07/2002 | WO2002010507A1 Process for digesting woodchips and digester additives |
| 02/07/2002 | WO2002010506A1 Process for digesting woodchips and digester additives |
| 02/07/2002 | US20020014317 Method for processing straw pulp |
| 02/06/2002 | EP1177037A1 Aqueous fractionation of biomass based on novel carbohydrate hydrolysis kinetics |
| 02/05/2002 | US6344108 Producing fibrous materials for the manufacture of cellulose, paper, or boards of wood material |
| 01/30/2002 | CN1333403A Dogstail pulp large liquor ratio circular heating replacing digestion technology and digestion equipment thereof |
| 01/30/2002 | CN1078648C Technology for making pulp by forage alkaline process and method for disposing its produced sewage and its system device |
| 01/29/2002 | CA2202250C Black liquor impregnation in single-vessel hydraulic digester |
| 01/23/2002 | CN1332818A Kraft wood fibers for carboxyalkyl cellulose |
| 01/23/2002 | CN1332293A Pulping and paper-making process with palm shell as raw material |
| 01/22/2002 | CA2074054C Antifoams for the paper industry based on oil-in-water emulsions |
| 01/16/2002 | EP0792394B1 Black liquor impregnation in single-vessel hydraulic digester |
| 01/15/2002 | US6339222 Quantitative analysis of hydrogen ion and anions in pulp milling process |
| 01/10/2002 | US20020003032 Method for pre-processing and processing pulp |
| 01/09/2002 | CN1330057A Process for preparing multi-element organic furtilizer from extract of black paper-making liquid |
| 01/09/2002 | CN1077631C Cooling pulping paper-making method |
| 01/03/2002 | WO2002000995A1 Method for preparing pulp from cornstalk |
| 01/03/2002 | WO2001059203A3 Pulping process |
| 01/03/2002 | WO2001059202A3 Pulping process |
| 01/02/2002 | CN1329193A Salix mongolica imonium pulping and paper-making method |
| 12/25/2001 | US6332950 Method in connection with the pretreatment of comminuted fibrous material |
| 12/19/2001 | CN1327101A Formula for paper making assistant |
| 12/18/2001 | US6331354 Alkaline pulp having low average degree of polymerization values and method of producing the same |
| 12/12/2001 | EP1161592A1 Process for oxygen pulping of lignocellulosic material and recovery of pulping chemicals |
| 12/12/2001 | EP0912796B1 Method and apparatus for filling a pulp tower |
| 12/06/2001 | WO2001092635A1 Method for regulating a process for manufacturing paper pulp by measuring the amount of hexenuronic acid optically |
| 12/06/2001 | WO2001042555A3 Method for reducing and/or avoiding the build up of wood components |
| 12/05/2001 | EP1109750A4 Process for the inhibition of scale in harsh systems and novel antiscalants for same |
| 12/05/2001 | CN1325276A Method for processing straw pulp |
| 12/04/2001 | US6325892 Method of delignifying sulphite pulp with oxygen and borohydride |
| 12/04/2001 | US6325888 Method for pulping sawdust |
| 11/22/2001 | WO2001088236A2 Alkaline pulp having low average degree of polymerization values and method of producing the same |
| 11/21/2001 | EP0832319B1 Process for enhancing white liquor penetration into wood chips |
| 11/21/2001 | CN1323366A Semi alkaline steam explosion treatment of fibrous material for the production of cellulose pulp |
| 11/15/2001 | WO2001086043A1 Lyocell fibers |
| 11/15/2001 | US20010041749 Contaminant dispersants useful in recycling of treated containers |
| 11/01/2001 | US20010035271 Process for the inhibition of scale |
| 10/30/2001 | CA2184706C Impact of temperature and alkali charge on pulp brightness |
| 10/25/2001 | WO2001029308A8 Fibers from plant seeds and use |
| 10/25/2001 | US20010032711 Pulp cooking with particular alkali profiles |
| 10/24/2001 | EP1092059A4 Partial autocausticization of alkali liquors for wood pulping processes |
| 10/24/2001 | EP1090181A4 Increasing causticizing efficiency of alkaline pulping liquor by borate addition |
| 10/23/2001 | US6306635 Fungal cellulases |
| 10/23/2001 | US6306334 Dissolving cellulose in solvent to form a dope; extruding dope through spinning orifices in melt blowing head while maintaining conditions of gas velocity, to form elongated latent fiber strands; regenerating strands to form lyocell |
| 10/17/2001 | EP1144756A1 Kraft wood fibers for carboxyalkyl cellulose |
| 10/17/2001 | EP0837965B1 Impregnation of fiber material |
| 10/16/2001 | US6302997 Environmentally-benign alternatives to the use of trees. |
| 10/11/2001 | US20010028955 Lyocell fibers, and compositions for making the same |
| 10/11/2001 | US20010027850 Method and apparatus for pulp yield enhancement |
| 10/11/2001 | US20010027849 A pressure vessel having a lengthwise axis, a rear upstream inlet end having a wood chip intake means, and a front outlet having a pulp outlet means |
| 10/10/2001 | EP1141478A1 Paper repulping method |
| 09/27/2001 | US20010023749 Method for processing straw pulp |
| 09/27/2001 | US20010023748 Feeding liquid slurry into top of vessel; withdrawal from bottom creating downward flow; horizontal flow of treating liquid |
| 09/25/2001 | US6294048 Partially autocausticizing a sodium carbonate-containing smelt by reaction with borate; dissolving borate-containing partially autocausticized smelt in aqueous solution; introducing lime to regenerate sodium hydroxide |
| 09/19/2001 | CN1313837A Process for the inhibition of scale in harsh system and novel antiscalants for same |
| 09/13/2001 | US20010020522 Chemically treating pulp precursor selected from wood chips or wood fibre to develop wood fibre of precursor while maintaining fibre integrity, and refining the chemically treated pulp precursor at high refining intensity |
| 09/12/2001 | CN1312865A Inhibition of corrosino in aqueous systems |
| 09/06/2001 | US20010018956 Multi-component system for modifying, degrading or bleaching lignin, lignin-containing materials or similar substances and processes for its use |
| 09/06/2001 | CA2326144A1 Strong sulfite kraft pulping |
| 08/29/2001 | CN1310258A Biological pretreatment process of preparing chemical mechanical straw pulp |
| 08/28/2001 | US6280568 For producing kraft pulp of increased strength and bleachability |
| 08/22/2001 | EP1126075A2 Dissolved solids control in pulp production |
| 08/22/2001 | EP0669998B2 Digester for continuous cooking of fibre material |
| 08/21/2001 | US6277240 Method for continuously pulping cellulosic fibrous material |
| 08/16/2001 | WO2001059204A1 Process for oxygen pulping of lignocellulosic material and recovery of pulping chemicals |
| 08/16/2001 | WO2001059203A2 Pulping process |
| 08/16/2001 | WO2001059202A2 Pulping process |
| 08/16/2001 | US20010013398 Photochemical irradiation coupling of furfural with halogen-ated furfural in presence of an acid scavenger such as poly-vinyl pyridine; conversion to such as diacid, dialcohol, dioxirane, diamide, diamine, diimine, dioxime, divinyl |
| 08/16/2001 | CA2399772A1 Pulping process |
| 08/16/2001 | CA2399723A1 Pulping process |
| 08/15/2001 | CN1308160A Technological process of producing viscose fiber size with bamboo and timber material |
| 08/08/2001 | CN1307657A Increasing causticizing efficiency of alkaling pulping liquor by borate addition |
| 07/18/2001 | EP1115944A1 Method for preparation of a fibrous stock out of herb-stemmed plants |
| 07/18/2001 | EP1115943A1 Method for precipitating hemicellulose onto fibres for improved yield and beatability |
| 07/18/2001 | EP1115907A1 Inhibition of corrosion in aqueous systems |
| 07/18/2001 | CN1304470A Partial autocausticization of alkali liquors for wood pulping processes |
| 07/17/2001 | US6261413 Continuously guiding liquids in a digester during pulp digestion |
| 07/12/2001 | WO2001049927A1 Method for controlling the cooking temperature in a continuous vapour phase digester |
| 07/10/2001 | US6258209 Multi-component system for modifying, degrading or bleaching lignin, lignin-containing materials or similar substances |
| 07/07/2001 | CA2330409A1 Metal extraction prior to chelation in chemical pulp production |
| 07/05/2001 | WO2001048472A1 Determination of kappa number in chemical pulps by raman spectrometry |
| 07/05/2001 | DE19962411A1 Recovering carboxylic acids from waste solutions in pulp production by adding an extraction agent to the waste solution |
| 07/04/2001 | EP0891438B1 Process for continuously guiding liquids when digesting pulp in a digester |
| 07/03/2001 | US6254723 Method for continuous cooking in a single-vessel digester |
| 07/03/2001 | US6254722 Method for making dissolving pulp from paper products containing hardwood fibers |
| 06/28/2001 | WO2001046520A1 Method for obtaining/recuperating by extraction carboxylic acids from waste liquors derived from pulp production |
| 06/28/2001 | WO2001046517A1 Delignified corn grain fiber and methods of making and using |