| Patents for D21C 9 - After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters (10,265) |
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| 08/13/1997 | EP0788568A1 Use of monocomponent cellulase for removing inks, coatings, and toners from printed paper |
| 08/13/1997 | EP0788541A1 An enzyme and enzyme preparation with endoglucanase activity |
| 08/13/1997 | EP0728239B1 Method of high yield paper pulp bleaching using hydrogen peroxide |
| 08/13/1997 | CN1157008A Purified myceliophthora laccase and nucleic acid encoding same |
| 08/13/1997 | CN1035599C Device for admixing medium and pulp suspension |
| 08/12/1997 | US5656130 Ambient temperature pulp bleaching with peroxyacid salts |
| 08/12/1997 | US5655390 Suspension-treating device |
| 08/06/1997 | EP0787231A1 Polyoxometalate delignification and bleaching |
| 08/06/1997 | EP0627028B1 Oxygen delignification of waste cellulosic paper products |
| 07/31/1997 | WO1997027363A1 Production of sanitary paper |
| 07/31/1997 | WO1997027358A2 Oxygen delignification of medium consistency pulp slurry |
| 07/31/1997 | CA2239876A1 Oxygen delignification of medium consistency pulp slurry |
| 07/30/1997 | EP0786082A1 A method of determining the organic content in pulp and paper mill effluents |
| 07/30/1997 | EP0786030A1 Washing pulp using an endless support fabric |
| 07/30/1997 | EP0786029A1 Method for removal of hexenuronic acid groups in cellulose pulp by heat treatment |
| 07/26/1997 | CA2195993A1 Procedure for the burning of black liquor in a recovery boiler |
| 07/24/1997 | WO1997026404A1 Pulping ligno-cellulosic material using high frequency radiation |
| 07/24/1997 | WO1997026308A1 Stabilized gas-enriched and gas-supersaturated liquids |
| 07/24/1997 | CA2244866A1 Pulping ligno-cellulosic material using high frequency radiation |
| 07/23/1997 | EP0785250A1 Phenolic complexing agents |
| 07/23/1997 | EP0784721A1 A method for treating acid and alkaline waste streams from a bleach plant separately |
| 07/23/1997 | EP0784720A1 Treatment of chemical pulp with a chelating agent and an oxidizing agent in connection with bleaching |
| 07/22/1997 | US5650149 Triglyceride oleate, yeast extract, cysteine hydrochloride |
| 07/22/1997 | CA2100361C Bleaching of lignocellulosic material with activated oxygen |
| 07/16/1997 | CN1154729A Method for bleaching wood pulp using hydrogen peroxide |
| 07/08/1997 | US5645688 Bleaching compositions and processes employing sulfamates and polyaminocarboxylic acids |
| 07/08/1997 | US5645687 Process for manufacturing bleached pulp with reduced chloride production |
| 07/08/1997 | US5645686 Process for bleaching a pulp in a sequence including an enzyme stage |
| 07/02/1997 | EP0781762A1 Process for preparing glycine-N,N-diacetic acid derivatives |
| 07/02/1997 | CN1153241A Process in association with pulp bleaching |
| 07/01/1997 | US5643410 Batch process for preparing kraft pulp in a batch digesting process |
| 06/26/1997 | WO1997022749A1 Process for treating refiner pulp |
| 06/26/1997 | WO1997022744A1 Method for the production of highly absorbent hybrid fibres by ozoning and graft polymerizing and hybrid fibres produced through the method |
| 06/26/1997 | CA2240391A1 Novel xylanases and uses thereof |
| 06/24/1997 | US5641402 Multistage disc filter |
| 06/24/1997 | US5641386 Aminoalkane diphosphonic acids in pulp bleaching |
| 06/24/1997 | US5641385 Use of ethyleneamine for washing pulp containing lignin |
| 06/19/1997 | WO1997021868A1 A pulp-dewatering roll press |
| 06/19/1997 | WO1997005324A3 Method and apparatus for bleaching high consistency pulp with a gaseous bleaching reagent |
| 06/19/1997 | WO1997004162A3 Wet-laid absorbent pulp sheet suitable for immediate conversion into an absorbent product |
| 06/18/1997 | EP0778909A1 Pulp bleaching |
| 06/18/1997 | EP0778908A1 Thin mat washing of cellulosic pulp |
| 06/18/1997 | EP0674731A4 Method and apparatus for regulating wood pulp bleaching. |
| 06/18/1997 | EP0674729A4 Improved pulp bleaching apparatus and method. |
| 06/17/1997 | US5639348 Bleaching compositions comprising sulfamates and borates or gluconates and processes |
| 06/17/1997 | US5639347 Method of controlling of metals in a bleach plant, using oxidation |
| 06/12/1997 | WO1997020983A1 Oxygen delignification of medium consistency pulp slurry |
| 06/12/1997 | WO1997020920A1 Novel xylanase composition and method for production thereof |
| 06/11/1997 | EP0778370A1 Process for the addition of a reducing bleaching agent to a high consistency paper fibrous material |
| 06/11/1997 | EP0777781A2 A pulp slurry-handling press roll, and twin roll and single roll slurry-handling presses |
| 06/11/1997 | CN1151460A Oxygen bleaching method of daily producing 30-50 tons medium density paper pulp |
| 06/10/1997 | US5636849 Translatable bearing stuffing box |
| 06/05/1997 | WO1997020102A1 Method and apparatus for continuously preparing cellulose pulp |
| 06/04/1997 | EP0777011A2 Process for deinking recycled paper pulp |
| 06/04/1997 | EP0776394A1 Enhancements in pulping with dissolved solids control |
| 06/04/1997 | EP0670924B1 Method of continuously cooking pulp |
| 06/04/1997 | CN2255448Y Looped-network replaceable squeezing wash engine |
| 06/03/1997 | CA2099679C Process for de-inking recycled paper pulp |
| 06/03/1997 | CA2098661C Method of bleaching paper pulp |
| 05/29/1997 | WO1997019222A1 Neutral monoperoxysulfate bleaching |
| 05/29/1997 | WO1997018897A2 Process for producing an organic thickening and suspension agent |
| 05/29/1997 | WO1997015712A3 Hot water extraction for pulp bleaching sequences |
| 05/29/1997 | WO1997015711A3 Production of soft paper products from high and low coarseness fibers |
| 05/28/1997 | EP0775226A1 Concentrate of stabilisers for aqueous bleaching and treating solutions based on hydrogen peroxide and/or other inorganic and/or organic peroxo compounds |
| 05/28/1997 | EP0775165A1 Dadmac/vinyl trialkoxysilane copolymers and their use in wastewater treatment |
| 05/28/1997 | EP0721525A4 DESCALING BY REGULATING pH AND SALT CONCENTRATION |
| 05/28/1997 | DE19543480A1 Production of paper and pulp from vegetable fibres |
| 05/22/1997 | DE19543310A1 Verfahren zur Herstellung eines organischen Verdickungs- und Suspensionshilfsmittels A method for producing an organic thickening and suspension aid |
| 05/20/1997 | US5630909 Guide vane in a pin-rotor fluffer to aid in wood pulp mat retention by providing a cyclic lift; uniform bleaching |
| 05/20/1997 | US5630906 Process for the delignifcation and bleaching of a lignocellulose material |
| 05/20/1997 | CA2040871C Process for bleaching of lignocellulose-containing material |
| 05/17/1997 | CA2190573A1 Method and apparatus for delignifying chemical pulp |
| 05/15/1997 | WO1997017489A1 Process for oxygen delignification |
| 05/15/1997 | DE19626200A1 The whiteness of paper fibre is increased |
| 05/14/1997 | EP0772717A1 Process for preparing a lignocellulose-based product, and product obtainable by the process |
| 05/14/1997 | EP0772702A1 Method for preparation of pigmented paper fibers and fiber products |
| 05/13/1997 | US5628872 Method for bleaching pulp with hydrogen peroxide recovered from cellulosic spent liquor |
| 05/09/1997 | WO1997016595A1 Paper and paper-like products including water insoluble fibrous carboxyalkyl cellulose |
| 05/09/1997 | WO1997016591A1 Pressure washer drum |
| 05/07/1997 | EP0771902A1 Process for the production of pulp and paper |
| 05/07/1997 | DE19540359A1 Production of paper and pulp from vegetable fibres |
| 05/07/1997 | CN1034823C Paper, paper plate and cellulose plate pulping method |
| 05/06/1997 | US5626720 Water soluble cationic polymer from epihalohydrin and a dialkylamine and another amine |
| 05/06/1997 | US5626718 Use of polymers in the recycled fiber washing/deinking process |
| 05/06/1997 | US5626297 Wood pulp ozone bleaching contactor |
| 05/02/1997 | EP0770158A1 Method for bleaching wood pulp using hydrogen peroxide |
| 05/02/1997 | EP0770157A1 Improved bleaching of high consistency lignocellulosic pulp |
| 05/02/1997 | EP0606250B1 A method and device for treating fibre material |
| 05/01/1997 | WO1997015715A1 Oxygen delignification of lignocellulosic pulp in two steps |
| 05/01/1997 | WO1997015714A1 Bleaching sequence for chemical paper pulp including sulphonating and oxidising bleaching stages |
| 05/01/1997 | WO1997015713A1 Acid treatment of pulp at high temperature in connection with bleaching |
| 05/01/1997 | WO1997015712A2 Hot water extraction for pulp bleaching sequences |
| 05/01/1997 | WO1997015711A2 Production of soft paper products from high and low coarseness fibers |
| 05/01/1997 | CA2236004A1 Hot water extraction for pulp bleaching sequences |
| 05/01/1997 | CA2232364A1 Production of soft paper products from high and low coarseness fibers |
| 05/01/1997 | CA2188909A1 Process for the production of paper and pulp |
| 04/29/1997 | US5624569 Recycled paper, using silicon-containing polyelectrolyte polymer coagulant |
| 04/23/1997 | EP0769084A1 Arrangement for a continuous diffuser for washing pulp |
| 04/23/1997 | EP0573536B1 Xylanase, xylanase-producing bacillus and applications thereof |
| 04/20/1997 | CA2186204A1 Bleaching of pulp |