| Patents for D21C 9 - After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters (10,265) |
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| 08/24/1999 | US5942088 Apparatus for bleaching high consistency pulp with a gaseous bleaching reagent |
| 08/19/1999 | WO1999041448A1 Method for the simple and environmentally benign pulping of nonwood fibrous materials |
| 08/19/1999 | WO1999040994A1 Thickener |
| 08/19/1999 | DE19805593A1 Eindicker Thickener |
| 08/19/1999 | CA2320997A1 Thickener |
| 08/19/1999 | CA2258387A1 Removal of transition metal ions from wood pulp fibers |
| 08/18/1999 | EP0935693A1 Treatment process for cellulosic fibers |
| 08/18/1999 | CN2333741Y 洗浆机 Washer |
| 08/17/1999 | US5938894 Absorbent cellulosic material and production thereof |
| 08/17/1999 | US5938892 Recycling filtrate from oxidative extraction stage countercurrently through bleaching plant and brown stock washing; also recycling filtrate from first chlorine dioxide bleaching stage contercurrently through brown stock washing |
| 08/17/1999 | CA2230315A1 Process for increasing mechanical wood pulp brightness in a refiner |
| 08/11/1999 | EP0934441A1 Readily defibered pulp products and method of their manufacture |
| 08/11/1999 | EP0934402A1 High molecular weight trichoderma cellulase |
| 08/11/1999 | EP0765381B1 Bleach activation |
| 08/11/1999 | EP0702735B1 Method of bleaching pulp without using chlorine chemicals |
| 08/11/1999 | CN1225698A Method for delignification of fibrous material and use of catalyst |
| 08/10/1999 | US5936024 Methods and compositions for treating stickies |
| 08/10/1999 | CA2007986C Apparatus and process for the delignification of cellulose pulp |
| 08/05/1999 | WO1999039146A1 Method and apparatus for treating material having poor thermal conductivity |
| 08/05/1999 | WO1999039045A1 Aqueous compositions comprising complexing agents and uses therof |
| 08/05/1999 | WO1999039044A1 Method and device for measuring bleach requirement, bleachability, and effectiveness of hemicellulase enzyme treatment of pulp |
| 08/05/1999 | CA2335037A1 Aqueous compositions comprising complexing agents and uses thereof |
| 08/05/1999 | CA2318878A1 Method and apparatus for treating material having poor thermal conductivity |
| 08/04/1999 | EP0932688A1 Chrysosporium cellulase and methods of use |
| 08/04/1999 | CN1044504C Process for pulp bleaching |
| 08/03/1999 | US5932067 Method and apparatus for processing a fibrous mass in a spiral shaped flow-typed tube cell |
| 07/28/1999 | EP0931874A1 Pulp bleaching process including final stage treatment step with salt of peroxymonosulfuric acid |
| 07/27/1999 | US5928470 Method for filling and coating cellulose fibers |
| 07/22/1999 | WO1999036199A1 Method for separating wax from waste paper |
| 07/22/1999 | CA2258443A1 Pulp bleaching process including final stage brightening step with salt of peroxymonosulfuric acid |
| 07/21/1999 | EP0929717A1 Pitch control composition |
| 07/21/1999 | EP0929500A1 A process to manufacture stabilized alkali or alkaline earth metal hypobromite and uses thereof in water treatment to control microbial fouling |
| 07/21/1999 | CN2329687Y Filter-pressing back washing machine |
| 07/20/1999 | US5925218 Rehydration of once-dried fiber |
| 07/15/1999 | WO1999035482A1 A method and an arrangement for measuring the amount/activity of catalase before or in connection with bleaching of preferably cellulose fibres included in a pulp suspension |
| 07/15/1999 | WO1999035333A1 Improved papermaking processes |
| 07/15/1999 | WO1999035330A1 Improved fluffed pulp and method of production |
| 07/15/1999 | CA2316789A1 Improved fluffed pulp and method of production |
| 07/15/1999 | CA2280804A1 A method and an arrangement for measuring the amount/activity of catalase before or in connection with bleaching of preferably cellulose fibres included in a pulp suspension |
| 07/14/1999 | EP0928348A1 Polyanhydride cross-linked fibrous cellulosic products and process for their preparation |
| 07/07/1999 | CN1044020C Appts. for fluffing pulp |
| 07/06/1999 | US5919691 Enzyme and enzyme preparation with endoglucanase activity |
| 07/06/1999 | US5919337 Method of continuously isothermally cooking of pulp |
| 07/01/1999 | WO1999032710A1 Bleaching of chemical pulp with peracid |
| 06/30/1999 | EP0926234A2 Thermostable xylanases |
| 06/30/1999 | EP0925401A1 Method for bleaching paper pulp |
| 06/30/1999 | CN1043914C Method for reducing thermal and light-induced brightness reversion in lign in-containing pulps |
| 06/29/1999 | US5916795 Thermostable xylanase |
| 06/29/1999 | US5916532 By autooxidation of anthraquinone derivative |
| 06/29/1999 | US5916415 Impregnating with oxygen gas and with alkali to bring the phto 11; agitating mixture in a high shear mixer and reacting in a pressurized reactor; impregnating with hydrogen peroxide and oxygen in a second reactor |
| 06/29/1999 | CA2140923C Lowering the ph of textile processing solution with an acid/base salt as a ph adjusting agent |
| 06/29/1999 | CA2003515C Method of and device for fractionating suspensions |
| 06/24/1999 | WO1999031312A1 Polymeric polycarboxylic acid crosslinked cellulosic fibers |
| 06/23/1999 | EP0923635A2 Metal ligand containing bleaching compositions |
| 06/23/1999 | CN1220659A N-bis- or N-tris-[(1,2-dicarboxy-ethoxy)-ethyl]-amine derivatives and preparation and use of the same |
| 06/23/1999 | CN1043798C Environmentally improved process for bleaching lignocellnlosic materials |
| 06/22/1999 | US5914190 Method ABD preparation of pigmented paper fibers and fiber products |
| 06/22/1999 | US5914006 Adding alkoxylation product from reaction of c10-22 carboxylic acid and alkylene oxide |
| 06/17/1999 | WO1999029779A1 Composition for bleaching woodpulp and process for its production |
| 06/16/1999 | EP0836495A4 Delivery of oxygen-supersaturated physiologic solutions |
| 06/16/1999 | CN1219628A Comprehensive preparation method for normal temp. deinking agent for waste paper |
| 06/09/1999 | EP0920552A1 Method for lowering the level of oxalic acid |
| 06/09/1999 | EP0920551A1 Method of agglomerating stickies in an aqueous slurry of wastepaper |
| 06/09/1999 | EP0838010A4 High pressure gas exchanger |
| 06/09/1999 | CN2323000Y Double-side air suction washing box |
| 06/09/1999 | CN2322999Y Horizontal spiral mesh-belt pulp dresser |
| 06/03/1999 | WO1999027179A1 Method for bleaching cellulose in a closed system using caro's acid |
| 06/03/1999 | WO1999027178A1 Improvements to the bleaching process for chemical pulp and intermediate pulp dispersions |
| 06/03/1999 | WO1999027177A1 Method for deinking and other contaminent removal from wastepaper |
| 06/03/1999 | CA2310278A1 Improvements to the bleaching process for chemical pulp and intermediate pulp dispersions |
| 06/02/1999 | EP0919661A1 Peroxide bleaching process for cellulosic and lignocellulosic material |
| 06/02/1999 | EP0918840A1 Metal ligand containing bleaching compositions |
| 06/02/1999 | CN1218442A Method and apparatus for delivering variable flow of hydrogen peroxide |
| 06/01/1999 | US5908560 Treatment of hazardous wastewater |
| 06/01/1999 | US5908532 Method of converting chlorine dioxide present in a gaseous stream from a pulp bleach plant by irradiation to chlorine |
| 06/01/1999 | CA2161851C Pressure washer drum |
| 05/27/1999 | WO1999025919A1 Bleaching of chemical pulp and treatment with a chelating agent |
| 05/27/1999 | DE19751174A1 Fiber pulp bleaching method for bleaching fiber pulp from recycled used paper materials |
| 05/27/1999 | DE19751173A1 Pulp bleaching method especially for recycling used paper materials |
| 05/26/1999 | EP0917553A1 Pitch control composition based on blend of derivatized cationic guar and styrene maleic anhydride copolymer |
| 05/26/1999 | CN2320650Y Double-roller pressing de-watering machine |
| 05/25/1999 | US5907055 Use of triacids based on alkoxylated tertiary amines as complexing agents |
| 05/25/1999 | US5907037 Sulfonated cellulose; for removal of heavy metal ions from aqueous solutions |
| 05/20/1999 | WO1999024661A1 A process for improving the drainage of cellulosic pulps |
| 05/20/1999 | WO1999024660A1 Method for filling and coating cellulose fibers |
| 05/20/1999 | WO1999024392A1 Diester amine adducts |
| 05/18/1999 | US5904753 Separation device and process |
| 05/18/1999 | CA2116681C Defoamer composition |
| 05/14/1999 | WO1999023117A1 Method for modification of cellulose |
| 05/12/1999 | EP0914517A1 Method and apparatus for bleaching wood pulp, especially containing waste paper |
| 05/12/1999 | EP0662170B1 Liquid removal apparatus and method for wood pulp |
| 05/12/1999 | CN1043370C Two-purpose machine for steaming and washing paper pulp |
| 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 |
| 05/11/1999 | US5902559 Plant for the production of hydrogen peroxide |
| 05/11/1999 | US5902456 Dewatering apparatus |
| 05/11/1999 | US5901585 Drum supported by support rollers for washing fibre material |
| 05/06/1999 | EP0912789A2 Stock washer for washing, thickening and classifying solids |
| 05/06/1999 | EP0912234A1 Mixing device |
| 05/06/1999 | EP0792395B1 Method to regenerate gas mixture in ozone-bleaching process |
| 05/05/1999 | CA2214957A1 Process to produce bright pulp in an electrochemical reactor |