| Patents for D21C 9 - After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters (10,265) |
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| 05/04/1999 | US5900123 Device for distributing liquid, especially washing liquid, for washing paper pulp |
| 05/04/1999 | US5900111 Process for sanitizing post-consumer paper fibers using heat and hydrogen peroxide |
| 04/29/1999 | WO1999020830A1 Chemical pulp paper production method |
| 04/29/1999 | WO1999020829A1 Chemical paper pulp production method |
| 04/28/1999 | EP0910695A1 Methods for inhibiting organic contaminant deposition in pulp and papermaking systems |
| 04/28/1999 | EP0840820B1 Method and apparatus for bleaching pulp with a gaseous bleaching reagent |
| 04/28/1999 | CN1215109A Method for reducing whiteness inversion of wood pulp caused by heat and light |
| 04/22/1999 | WO1999019560A1 Method and apparatus for heating pulps |
| 04/22/1999 | WO1999019559A1 Polymers as detackification agents for adhesives contained in secondary fiber |
| 04/22/1999 | WO1999019057A1 Method and apparatus for introduction of a first fluid into a second fluid |
| 04/22/1999 | WO1998056958A8 Process for the production of xylose from a paper-grade, hardwood pulp |
| 04/21/1999 | EP0909810A1 Use of aminonitrile-N-oxides as bleach activators |
| 04/21/1999 | EP0909354A1 Pressurized chlorine dioxide bleaching with recovery of chlorine dioxide |
| 04/21/1999 | CN1214696A Process for fluorinating cellulosis materials and fluorinated cellulosic materials |
| 04/21/1999 | CN1214389A Method of treating papermaking fibers for making tissue |
| 04/15/1999 | WO1999018067A1 Sulphinic acid derivatives, method for producing them, and their use |
| 04/15/1999 | DE19743693A1 Hydrogen peroxocarbonate peroxohydrates with high active oxygen content, useful as oxidant |
| 04/14/1999 | EP0907788A1 Process for the bleaching of chemical pulp |
| 04/14/1999 | EP0907787A1 Distributing device for paper pulp |
| 04/14/1999 | EP0907786A1 Improved pulp washing method |
| 04/14/1999 | EP0907409A1 Method and apparatus for mixing a second medium with a first medium |
| 04/14/1999 | CN1213722A Process for bleaching of chemical paper pulps |
| 04/08/1999 | WO1999016962A1 Wood pulp delignifiction and bleaching process by means of electrochemically oxidised organic compounds |
| 04/08/1999 | WO1999016961A1 Resin-treated mercerized fibers and products thereof |
| 04/08/1999 | WO1999016960A1 Cellulose treatment and the resulting product |
| 04/08/1999 | DE19743759A1 New sulfinic acid derivatives, used as reducing agents |
| 04/07/1999 | EP0906987A1 Process for bleaching chemical paper pulps |
| 04/07/1999 | EP0906071A1 Apparatus and method of delivery of gas-supersaturated liquids |
| 04/07/1999 | EP0832139B1 Polymers, their production and their use |
| 04/07/1999 | EP0576541B1 High efficiency chlorine dioxide pulp bleaching process |
| 04/06/1999 | US5891304 Use of hydrophilic dispersion polymers for coated broke treatment |
| 04/06/1999 | US5891303 Method for separating wax from waste paper |
| 04/03/1999 | CA2246569A1 Process for bleaching chemical paper pulp |
| 04/01/1999 | WO1999015729A1 Method for bleaching mechanical pulp |
| 04/01/1999 | WO1999015278A1 Apparatus for cleaning a suspension, preferably a fiber mass suspension |
| 04/01/1999 | WO1998016462A9 Treatment of chlorine dioxide generator effluent and feed streams with fixed-resin bed |
| 04/01/1999 | DE19742748A1 Verfahren zum Delignifizieren und Bleichen von Zellstoffen unter Verwendung elektrochemisch oxidierbarer organischer Verbindungen A method for delignification and bleaching of pulps using electrochemically oxidizable organic compounds |
| 04/01/1999 | CA2270475A1 Method for bleaching mechanical pulp |
| 03/31/1999 | EP0905307A1 Method for applying ozone in ECF bleaching |
| 03/31/1999 | EP0905306A1 Multicomponent system for modifying, decomposing or bleaching lignin or lignin-containing materials and method of using this system |
| 03/31/1999 | EP0904445A1 Method for the production of highly absorbent hybrid fibres by ozoning and graft polymerizing and hybrid fibres produced through the method |
| 03/31/1999 | EP0904263A1 N-bis- or n-tris- (1,2-dicarboxy-ethoxy)-ethyl]-amine derivatives and preparation and use of the same |
| 03/31/1999 | EP0812297B1 PLANT FOR PRODUCING HYDROGEN PEROXIDE $i(IN SITU) IN A PAPER MILL |
| 03/31/1999 | CN1212310A Process for bleaching paper pulp with ozone and chlorine dioxide |
| 03/30/1999 | US5888802 Thermostable xylanase |
| 03/26/1999 | CA2248530A1 Multicomponent system for modifying, degrading, or bleaching lignin or lignin-containing materials, and processes for its use |
| 03/24/1999 | CN1211655A Method of whitening lignin-containing pulp during manufacture |
| 03/23/1999 | US5886095 Crosslinking a polyamino-ether, which has been prepared from a glycol dichlorohydrin or polyglycol dicholrohydrin and a polyamine and still contains free epichorohydrin groups, in an alkaline ph under the influence of heating |
| 03/23/1999 | US5885419 Adding a blood-related protein, e.g. alblumin, globulin and/or sprayed dried animal cells; antisticking agents; detackifying; adsorbers; desorbers |
| 03/23/1999 | US5885412 Adding a complexing agent and a detergent and a hydroxylamine or derivative or salt that will cause inhibition of hydrogen peroxide decomposing enzyme such as peroxidase and catalase, bleaching recycled paper with hydrogen peroxide |
| 03/23/1999 | US5885304 Aromatic compounds containing at least two rings, at least one substituted with nitrogen oxygen, or sulfur |
| 03/18/1999 | WO1999013155A1 Polyammonium quaternary polymer for controlling anionic trash and pitch deposition and treating coated broke |
| 03/18/1999 | WO1998059108A3 Oxidation and bleaching system with enzymatically produced oxidizing agents |
| 03/18/1999 | CA2215855A1 A method for pretreatment with na2s to improve the efficiency of hydrogen peroxide bleaching of pulp |
| 03/17/1999 | EP0902120A1 Process for bleaching a paper pulp with ozone and chlorine dioxide |
| 03/17/1999 | EP0902119A2 Process for preparing a paper web |
| 03/16/1999 | CA2073763C Ctmp-process |
| 03/16/1999 | CA1340434C Process for making individualized crosslinked fibers having reduced residuals and fibers thereof |
| 03/15/1999 | CA2247532A1 Process for bleaching a paper pulp with ozone and chlorine dioxide |
| 03/11/1999 | WO1999011857A1 Transition-metal substituted tungstoaluminate complexes for delignification and waste mineralization |
| 03/11/1999 | WO1999011357A1 Apparatus for filtering suspensions |
| 03/11/1999 | CA2301719A1 Transition-metal substituted tungstoaluminate complexes for delignification and waste mineralization |
| 03/11/1999 | CA2301164A1 Apparatus for filtering suspensions |
| 03/10/1999 | EP0900300A1 A method for the delignification of fibrous material and use of a catalyst |
| 03/10/1999 | EP0900299A1 Compositions and methods for inhibiting deposits in pulp and papermaking systems |
| 03/04/1999 | DE19736875A1 Increasing brightness of pre-bleached kraft pulps |
| 03/03/1999 | EP0899377A2 High-bulk cellulosic fibers and process for making the same |
| 03/03/1999 | EP0899374A1 Method of producing a bleached pulp |
| 03/03/1999 | EP0899373A1 Method of whitening lignin-containing pulp during manufacture |
| 03/03/1999 | CN1209480A Method for using ozone in bleaching of ECF |
| 03/03/1999 | CN1209479A Method of paper-making of cold pulping and bleaching using plant preparation |
| 03/02/1999 | US5876625 Metal ligand containing bleaching compositions |
| 03/02/1999 | US5876561 Chlorination; delignification |
| 03/01/1999 | CA2246107A1 Method of producing a bleached pulp |
| 02/28/1999 | CA2245966A1 Method of whitening lignin-containing pulp during manufacture |
| 02/25/1999 | WO1999009244A1 Chemical method for lignin depolymerization |
| 02/25/1999 | CA2245535A1 Methods for applying ozone in ecf bleaching |
| 02/24/1999 | EP0729369A4 Method and apparatus for delivering oxygen into blood |
| 02/24/1999 | CN1042245C Method for mfg. thin tissue paper |
| 02/23/1999 | US5873979 Preparing individualized polycarboxylic acid crosslinked cellulosic fibers |
| 02/23/1999 | CA2152834C Arrangement for lowering the noise level of a cooling layer in a pulp dryer and a pulp dryer |
| 02/23/1999 | CA2151593C Apparatus for filtering suspensions |
| 02/17/1999 | EP0687321B1 Method of bleaching pulp with chlorine-free chemicals |
| 02/11/1999 | WO1999006320A1 A process to manufacture stabilized alkali or alkaline earth metal hypobromite and uses thereof in water treatment to control microbial fouling |
| 02/10/1999 | EP0896046A1 A Composition for treatment of cellulosic material |
| 02/10/1999 | EP0896045A1 A composition for treatment of cellulosic material |
| 02/10/1999 | EP0895520A1 Process for preparing water-soluble, polyamino polycarboxylic acids |
| 02/09/1999 | CA2151364C A method of producing mechanical and chemi-mechanical pulp |
| 02/06/1999 | CA2244483A1 A composition for treatment of cellulosic material |
| 02/04/1999 | WO1999005108A1 Inhibition of pulp and paper yellowing using nitroxides and other coadditives |
| 02/04/1999 | CA2295631A1 Inhibition of pulp and paper yellowing using nitroxides and other coadditives |
| 02/03/1999 | EP0894163A1 Method of preparation of a cellulosic pulp, cellulosic pulp to be used in absorbent products, and such absorbent product |
| 02/03/1999 | EP0579672B1 Xylanase, corresponding recombinant dna sequence, xylanase containing agent, and use of the agent |
| 02/03/1999 | CN1206762A Dissolved solids control in pulp production |
| 02/02/1999 | US5866618 Polyvinyl alcohol and a high molecular weight gelatin |
| 02/02/1999 | US5866526 Enzyme preparation comprising a modified enzyme |
| 02/02/1999 | US5866408 Modification of xylanase to improve thermophilicity, alkophilicity and thermostability |
| 02/02/1999 | US5866392 Cellobiose oxidase, and enzymatic agent and a process for treating paper pulp |
| 02/02/1999 | US5865948 Oxygen-free solvent pulping |
| 02/02/1999 | CA2094819C Pulping process |