Patents
Sitemap › D21 - Paper-making; Production of cellulose › D21C - Production of cellulose by removing non-cellulose substances from cellulose- containing materials; Regeneration of pulping liquors; Apparatus therefor › D21C 9 - After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters
Patents for D21C 9 - After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters (10,265)
11/1998
11/24/1998US5840787 Individualized chemically crosslinked fibers mixed with conventional cellulose fibers and a water-borne binding agent
11/24/1998US5840378 Endless fabric for condensing paper material and method of making thereof
11/24/1998US5839142 Stock washer for washing, thickening and classifying solids
11/24/1998CA2132056C A method of bleaching pulp
11/19/1998WO1998051855A1 Method of minimizing scaling problems in the manufacture of bleached cellulose pulp while using an essentially fully closed washing liquid flow pattern
11/19/1998WO1998051854A1 Apparatus for fluffing and contacting high consistency wood pulp with a gaseous bleaching reagent
11/19/1998DE19820947A1 Enzymatic bleach system containing mediator increasing pulp bleaching or coal liquefaction performance
11/18/1998CN2297469Y Composite external vacuum inside spin pulp extruder
11/18/1998CN1199424A Alkaliphilic and thermophilic microorganisms and enzymes obtained therefrom
11/17/1998US5836181 Diffuser
11/12/1998WO1998050629A1 Method for the preparation of cellulose pulp, cellulose pulp to be used in absorption products, and absorption product
11/11/1998EP0877078A2 Bleach activating metal complex
11/11/1998EP0876534A1 Production of sanitary paper
11/11/1998CN1198786A Method for reprochessing an ozone-containing gas present in a pulp bleaching plant
11/10/1998US5834095 Treatment process for cellulosic fibers
11/10/1998CA1340118C Oxygen bleaching with between stage washing
11/05/1998WO1998049391A1 Outlet arrangement in a pressure vessel for the bleaching of pulp
11/05/1998WO1998000601A3 Device for transferring and processing a humid fibrous mass
11/04/1998EP0579708B1 Lipase-catalyzed ester hydrolysis
11/04/1998CN1197870A Papermaking pulp-liquor separating technology and diffusion washing single cylinder vacuum filter press thereof
11/03/1998US5830382 Containing water soluble catalyst which is a group 1b or 8compound
10/1998
10/28/1998EP0874082A1 Continuous process for delignification and/or bleaching of virgin or recycled chemical pulp
10/28/1998EP0804646B1 Use of ethyleneamines in the removal of lignin
10/28/1998EP0793749B1 Processes for reducing contamination of cellulosic liquors
10/28/1998EP0717800A4 Medium consistency ozone brightening of high consistency ozone bleached pulp
10/28/1998CN2295782Y Lignin dewatering apparatus
10/27/1998US5827493 Catalytic hydrogenation of anthraquinone derivative, filtration, oxygenation, separation by water extraction; temperature controlling, countercurrent feeding of oxidizer and hydrogenated solution
10/27/1998CA2028550C Process for the production of chlorine dioxide
10/27/1998CA2028549C Process for the production of chlorine dioxide
10/22/1998WO1998046768A2 Phenolic acid esterase and use thereof
10/22/1998CA2286694A1 Phenolic acid esterase and use thereof
10/21/1998EP0770158B1 Method for bleaching wood pulp using hydrogen peroxide
10/21/1998EP0748412B1 Impact of temperature and alkali charge on pulp brightness
10/21/1998EP0741817B1 Method and apparatus for treating recycled pulp
10/20/1998US5824531 Alkaline bacilus amylase
10/20/1998US5824189 Oxidation of catalysts following oxidative delignification of wood pulp
10/20/1998US5824188 Method of controlling the pressure of a continuous digester using an extraction-dilution
10/15/1998WO1998045531A1 Washing apparatus comprising a float body
10/15/1998WO1998045251A1 Preparation and use of iminodisuccinic acid salts
10/15/1998CA2284693A1 Washing apparatus comprising a float body
10/08/1998WO1998044189A1 Enzyme aided removal of color from wood pulps
10/08/1998WO1998044188A1 Method and apparatus for filling a pulp tank
10/08/1998DE19713911A1 Herstellung und Verfahren von Iminodibernsteinsäuresalzen Preparation and methods of Iminodibernsteinsäuresalzen
10/08/1998CA2285244A1 Enzyme aided removal of color from wood pulps
10/07/1998EP0869171A2 Metal complexes as bleach activators
10/01/1998WO1998042911A1 Bleaching and delignifying cellulose using caroate/caro's acid and production of same
10/01/1998CA2284520A1 Bleaching and delignifying cellulose using caroate/caro's acid and production of same
09/1998
09/30/1998EP0867561A1 Process and apparatus for making a hot pulp, containing mainly paper fibres
09/30/1998EP0866898A1 Improved method of softening pulp and products produced by same
09/30/1998EP0866896A1 A pulp-dewatering roll press
09/30/1998EP0866895A2 Oxygen delignification of medium consistency pulp slurry
09/30/1998CN2292828Y Waste boiling liquor separating recovering device for papermaking
09/24/1998DE19803001A1 Bleichen und Delignifizierung von Zellstoff durch Caroate/Carosche Säure und Herstellung derselben aus Persulfaten/Perschwefelsäure, die elektrochemisch hergestellt wird Bleaching and delignification of pulp by caroates / Caro's acid and preparation thereof of persulfates / persulfuric acid, which is produced electrochemically
09/24/1998DE19712652C1 Preparation of used paper fibres for recycling
09/23/1998EP0866095A1 Compositions for bleaching paper
09/23/1998EP0865531A1 Oxygen delignification of medium consistency pulp slurry
09/23/1998EP0865484A1 Novel xylanase composition and method for production thereof
09/23/1998CN1193921A Single roll displacement wash press
09/22/1998US5811381 Cellulase compositions and methods of use
09/22/1998US5810973 Apparatus for producing small particles from high consistency wood pulp
09/17/1998WO1998040721A1 Method and apparatus for monitoring and controlling characteristics of process effluents
09/17/1998CA2282344A1 Method and apparatus for monitoring and controlling characteristics of process effluents
09/16/1998EP0864011A1 Method and apparatus for continuously preparing cellulose pulp
09/16/1998EP0745154B1 Multicomponent system for modifying, decomposing or bleaching lignin, lignin-containing materials or similar substances and method of using this system
09/16/1998CN1193364A Method for incorporating cellulose esters into cellulose by immersing cellulose in an acid-dope solution
09/16/1998CN1193327A Polymers, their preparation and use
09/16/1998CN1193062A Paper-pulp producing process
09/16/1998CN1193061A Cooling-pulping paper-making method
09/11/1998WO1998039258A1 Process for treating wastewater
09/10/1998DE19715783A1 Fibre suspension water extraction method
09/09/1998EP0863253A2 Process to thicken a fiber suspension
09/09/1998EP0863252A2 Process and apparatus to dewater a fiber suspension
09/09/1998EP0863251A1 Process for producing bleached pulp
09/09/1998EP0863113A1 Process for treating wastewater
09/09/1998EP0832323A4 Peroxide bleaching of pulp
09/09/1998EP0677122B1 A method of producing mechanical and chemi-mechanical pulp
09/06/1998CA2231316A1 Process and device for draining a fibrous pulp supension
09/04/1998CA2230961A1 Process for producing bleached pulp
09/03/1998WO1998038328A1 Method for producing cellulose derivatives
09/02/1998EP0861348A1 Neutral monoperoxysulfate bleaching
09/02/1998EP0725853B1 Multiple filter dynamic washer
09/01/1998US5800677 Adding zinc stearate to papermaking pulp slurry
08/1998
08/26/1998EP0823003A4 Ambient temperature pulp bleaching with peroxyacid salts
08/26/1998EP0811089A4 System and method for recycling materials
08/26/1998CN1039599C Apparatus for washing pulp fibre
08/25/1998US5798078 Sulfonated polymers and method of sulfonating polymers
08/25/1998US5798046 Enhanced removal of hydrophobic contaminants from water clarification systems
08/25/1998US5797874 Method of delivery of gas-supersaturated liquids
08/20/1998WO1998036125A1 Method of producing soft paper products
08/20/1998CA2279976A1 Method of producing soft paper products
08/19/1998EP0858528A1 Paper and paper-like products including water insoluble fibrous carboxyalkyl cellulose
08/19/1998EP0858526A1 Method of pretreating pulp to be bleached with peroxide
08/19/1998CN1191002A Process for preparing reduced odor and improved brightness individualized polycarboxylic acid crosslinked fibers
08/18/1998US5795855 Enhancement of laccase reactions
08/18/1998US5795760 Purified Myceliophthora laccases and nucleic acids encoding same
08/18/1998US5795487 Process to manufacture stabilized alkali or alkaline earth metal hypobromite and uses thereof in water treatment to control microbial fouling
08/13/1998WO1998035095A1 Lumen loading of mineral filler into cellulose fibers for papermaking
08/13/1998CA2280043A1 Lumen loading of mineral filler into cellulose fibers for papermaking
08/12/1998EP0857231A1 Oxygen delignification of lignocellulosic pulp in two steps
08/12/1998EP0857230A2 Production of soft paper products from high and low coarseness fibers
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