| Patents for D21C 3 - Pulping cellulose-containing materials (5,020) |
|---|
| 01/20/2000 | DE19754766A1 Production of cellulose useful for paper making by digesting potato tops with enzymes and sodium hydroxide solution |
| 01/20/2000 | CA2337411A1 A process for concentrating soluble and colloidal substances in process waters |
| 01/05/2000 | EP0627029B1 Pulp bleaching apparatus and method |
| 12/22/1999 | CN1047640C Method of producing sulphate pulp through steamed and pulverized cellulose fiber |
| 12/15/1999 | CN1238816A Method of producing pulp using single-stage cooking with formic acid and washing with performic acid |
| 12/09/1999 | WO1999063152A1 Increasing causticizing efficiency of alkaline pulping liquor by borate addition |
| 12/09/1999 | WO1999063151A1 Partial autocausticization of alkali liquors for wood pulping processes |
| 12/09/1999 | WO1999063149A1 Method for selectively delignifying lignocellulosic materials |
| 12/09/1999 | CA2332897A1 Method for selectively delignifying lignocellulosic materials |
| 12/08/1999 | EP0961851A1 Process for producing fibrous materials with improved properties |
| 12/07/1999 | CA2179425C Process for treating gas emissions from a kraft process with undecylenic and/or undecynoic acid |
| 11/30/1999 | CA2112771C Composition for producing paper and process for using same |
| 11/17/1999 | EP0957198A1 Chemical pulping process |
| 11/17/1999 | CN1235220A Process for pulping herbaceous plants without pollution |
| 11/12/1999 | CA2271900A1 Improved chemical pulping process |
| 11/11/1999 | WO1999057364A1 Process for producing pulp with a mixture of formic acid and acetic acid as cooking chemical |
| 11/11/1999 | WO1999045191A9 Treatment of cellulose material with additives while producing cellulose pulp |
| 11/03/1999 | EP0776394B1 Enhancements in pulping with dissolved solids control |
| 11/03/1999 | CN2346821Y Wholly enclosed foamless floatation deinking machine |
| 11/02/1999 | US5976321 Process for making sulfur enhanced undigested cellulosic fiber material and pulp |
| 10/27/1999 | EP0951347A1 Hydrolysis and fractionation of lignocellulosic biomass |
| 10/19/1999 | US5968314 Comminution of cellulose fibers, slurrying and digestion of fibers, purging with air |
| 09/29/1999 | CN1229870A Clean slurrying paper making tech. using grass as raw material |
| 09/28/1999 | US5958181 Wood chips |
| 09/23/1999 | WO1999047733A1 Lyocell fibers, and compositions for making the same |
| 09/23/1999 | WO1999047250A1 Device, method and pressurized reactor for the treatment of solids with liquefied gases under pressure |
| 09/23/1999 | WO1999047248A1 Contaminant dispersants useful in recycling of treated containers |
| 09/22/1999 | CN1229155A Alkali-free wood pulp papermaking method |
| 09/16/1999 | DE19910562A1 Treating solid materials with a liquid gas |
| 09/10/1999 | WO1999045191A1 Treatment of cellulose material with additives while producing cellulose pulp |
| 09/10/1999 | CA2320131A1 Treatment of cellulose material with additives while producing cellulose pulp |
| 08/31/1999 | US5944953 Pulping |
| 08/26/1999 | WO1999042652A1 Process for production of chemical pulp from herbaceous plants |
| 08/26/1999 | WO1999042651A1 Method for removing wax from a pulp furnish |
| 08/26/1999 | CA2320961A1 Method for removing wax from a pulp furnish |
| 08/25/1999 | EP0937813A2 Enhancement in pulping with dissolved solids control |
| 08/25/1999 | EP0937172A1 Method of producing pulp using single-stage cooking with formic acid and washing with performic acid |
| 08/19/1999 | WO1999041448A1 Method for the simple and environmentally benign pulping of nonwood fibrous materials |
| 08/12/1999 | WO1999040252A1 A pulping composition and process using aminoalkoxylsilanes |
| 08/10/1999 | CA2007986C Apparatus and process for the delignification of cellulose pulp |
| 07/29/1999 | WO1999037834A1 Process for the production of elementary vegetable bast fibres |
| 07/28/1999 | EP0931862A1 Process for the production of elementary vegetable bast fibres |
| 07/20/1999 | US5925218 Rehydration of once-dried fiber |
| 07/20/1999 | US5925216 Method of continuous pulping in a digester with high black liquor usage in the impregnation stage |
| 07/14/1999 | EP0928349A1 Cooking of chemical pulp in sulphur-free liquor containing a delignification-accelerating compound |
| 07/07/1999 | CN1222208A Method and appts.for filling pulp tower |
| 07/06/1999 | US5919337 Method of continuously isothermally cooking of pulp |
| 06/30/1999 | CN1043913C Process for modifying breaking down or bleaching ligin, material containing lignin or like material |
| 06/24/1999 | WO1999031315A1 Separation and determination of cellulosic components from plant material |
| 06/23/1999 | CN2325411Y Medium concentration pulp mixer |
| 06/23/1999 | CN1043798C Environmentally improved process for bleaching lignocellnlosic materials |
| 06/22/1999 | US5914362 Silicone-based antifoam compositions cross-reference to related applications |
| 06/22/1999 | US5914004 Method of producing pulp for paper manufacture |
| 06/16/1999 | CN1219615A Method for manufacturing artificial fibre pulp from all stalk of ambari hemp |
| 06/09/1999 | EP0921228A2 Method for the production of precleaned pulp |
| 06/09/1999 | CA2251483A1 Improved distribution of dilution liquor to the discharge of a cellulose pulp digester |
| 05/25/1999 | US5906709 Reducing size of raw materials to provide pumpable material, flowing in thin and turbulent layer while heating and introducing digesting agent to produce cellulose fibers |
| 05/20/1999 | CA2254155A1 Process for manufacturing high-yield, high-strength pulp at low energy |
| 05/11/1999 | US5902581 Having significant activity at low ph and high temperature; useful for bleaching pulp for papermaking, treating feed grains to improve digestibility |
| 05/06/1999 | WO1999022063A1 Cooking process for producing cellulose with b-constant based on a mathematical model |
| 05/06/1999 | EP0913181A1 Silicone-based antifoam compositions |
| 05/06/1999 | EP0912796A1 Method and apparatus for filling a pulp tower |
| 04/29/1999 | WO1999020830A1 Chemical pulp paper production method |
| 04/29/1999 | WO1999020829A1 Chemical paper pulp production method |
| 04/29/1999 | WO1999020828A1 Method for sulfite pulping using surfactants |
| 04/28/1999 | CN1215429A Enzyme multimer and process of producing same |
| 04/21/1999 | EP0909353A1 Method and device for the continuous cooking of pulp |
| 04/21/1999 | CN1214747A Process for continuously guiding liquids |
| 04/21/1999 | CN1214387A Cellulose powder production utilizing corn cob residue after eliminating hemicellulose |
| 04/20/1999 | CA2217415A1 Method for sulfite pulping using surfactants |
| 04/15/1999 | WO1999018285A1 Method for processing straw into pulp and paper product therefrom |
| 04/15/1999 | CA2304575A1 Method for processing straw into pulp and paper product therefrom |
| 03/25/1999 | WO1999014424A1 Pulp production method and apparatus |
| 03/25/1999 | WO1999014423A1 Polysulfide pulping process |
| 03/25/1999 | CA2304027A1 Pulp production method and apparatus |
| 03/24/1999 | EP0903436A2 Method in connection with impregnation and digestion of lignocellulosic material |
| 03/23/1999 | US5885414 Method of producing pulp with high alkali cooking in the last cooking stage |
| 03/17/1999 | EP0791099B1 Cellulose extraction process |
| 03/16/1999 | US5882477 Continuous digester with a low temperature gas-phase |
| 03/16/1999 | CA2073763C Ctmp-process |
| 03/09/1999 | US5879463 Simultaneous delignification and saccharification |
| 03/04/1999 | WO1999010595A1 Method for the recovery of formic acid |
| 03/04/1999 | WO1999010384A1 A raw material for use in the preparation of pectin and related compounds, and a method for the preparation of same |
| 03/04/1999 | CA2300936A1 A raw material for use in the preparation of pectin and related compounds, and a method for the preparation of same |
| 02/28/1999 | CA2214299A1 Composition and method for producing wood pulp |
| 02/25/1999 | WO1999009244A1 Chemical method for lignin depolymerization |
| 02/25/1999 | WO1999009243A1 Cooking of pulp with high effective alkali concentration in the residual phase |
| 02/18/1999 | WO1999007936A1 Continuous cooking with cool impregnation and dom control |
| 02/17/1999 | EP0896648A1 Hydrogen sulphide pretreatment of lignocellulosic material in continuous pulping processes |
| 02/16/1999 | US5871663 Deligninification of lignocellulose qith addition of nonionic surfactant |
| 02/16/1999 | US5871614 By addition to alkaline pulping liquor a surfactant mixturehaving hydrophilic-lipophilic balace from five to twenty comprising alkyl alcohol alkoxylate or polyoxyalkylene polyol ether of fatty acid esters |
| 02/10/1999 | CN1207782A Process for preparing pulp-cooking solution |
| 02/03/1999 | CN1206762A Dissolved solids control in pulp production |
| 02/03/1999 | CN1206761A Potassium hydroxide method of straw pulp paper making process |
| 02/02/1999 | US5865948 Oxygen-free solvent pulping |
| 02/02/1999 | CA2094819C Pulping process |
| 01/26/1999 | US5863783 Improving the break-down of plant cell walls which leads to better utilization of the plant nutrients, removing lignins and terpenoids from the cellulose and hemicellulose wood for papermaking, improving the clarity of fruit, vegetable juice |
| 01/21/1999 | DE19730486A1 Processing lignocellulose-containing biomass, especially wood |
| 01/20/1999 | EP0892107A1 Preparation of mechanical wood pulps with reduced energy |
| 01/20/1999 | EP0891438A1 Process for continuously guiding liquids when digesting pulp in a digester |