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)
08/1998
08/12/1998EP0610291B1 Method and apparatus for mixing gas into a fiber suspension and a bleaching process applying said method
08/11/1998US5792942 Apparatus for determining properties of slurry materials and sludge treating process
08/11/1998US5792441 Fixed-resin bed technologies for the treatment of the chlorine dioxide generator effluent and feeds stream
08/11/1998US5792316 Enhancing brightness and pulp viscosity by chlorination of pulp with hypochloric acid containing sodium hydroxide at ph 6-9 prior to single stage bleaching by contacting pulp simultaneously with chlorine and ozone gas mixture
08/11/1998US5791778 Method and apparatus for mixing gaseous chemical to fiber suspension
08/06/1998WO1998033972A1 Feeding of washing liquid in a pulp washer
08/06/1998WO1998033970A1 Process for producing fibrous materials with improved properties
08/06/1998DE19704183A1 Bleaching fibres from recycled paper
08/06/1998DE19704054A1 Verfahren zur Herstellung von Faserstoffen mit verbesserten Eigenschaften A process for producing fibrous materials with improved properties
08/06/1998CA2279524A1 Process for producing fibrous materials with improved properties
08/06/1998CA2276308A1 Feeding of washing liquid in a pulp washer
08/05/1998EP0856080A1 Acid treatment of pulp at high temperature in connection with bleaching
08/05/1998EP0856079A1 Supply of washing liquid in a fractionating multi-stage washer
08/05/1998EP0807210A4 A continuous dynamic mixing system and methods for operating such system
08/05/1998CN1189808A Stabilized alkali or alkaline earth metal hypobromite and process for its prodn.
08/05/1998CN1189556A Multi-component system for modifying, degrading or bleaching lignin, lignin-containing materials or similar substances and processes for its use
08/04/1998CA2155124C Inhibition of hydrogen peroxide decomposing enzymes, e.g. catalase and peroxidase during bleaching of cellulose fibers
07/1998
07/30/1998WO1998032914A1 A control scheme for rapid pulp delignification and bleaching
07/30/1998WO1998032913A1 Method for making chemical paper pulp
07/28/1998US5786313 Alpha-alanine-n,n-diacetic acid; industrial cleaning; dishwashing
07/28/1998US5785812 Process for treating oxygen delignified pulp using an organic peracid or salt, complexing agent and peroxide bleach sequence
07/28/1998US5785810 Wood pulp processing apparatus and method
07/23/1998WO1998031872A1 Oxygen delignification process of pulp
07/22/1998EP0853700A1 Method and apparatus for cleaning a fiber pulp washer from stickies
07/22/1998EP0853699A1 Apparatus for dewatering/pressing in combination with washing of paper pulp
07/16/1998WO1998030884A1 Method and arrangement for measuring the content of chemicals during bleaching
07/15/1998EP0852636A1 Method for improving the efficiency of chemical pulping processes by pretreating wood or pulpwood with white rot fungi
07/15/1998EP0852598A1 Sulfonated polymers and method of sulfonating polymers
07/15/1998EP0765416B1 Individualized cellulosic fibers crosslinked with polyacrylic acid polymers
07/15/1998CN1187858A High efficiency vessels for bleaching lignocellulosic, cellulosic and synthetic polymeric fibrous materials
07/14/1998US5779858 Deposition control in pulp and papermaking systems using a composition comprising of polyvinyl alcohol and gelatin
07/14/1998US5778704 Arrangement for a continuous diffuser for washing pulp
07/09/1998WO1998029598A1 Treatment of bleach plant filtrates with oxygen
07/09/1998WO1998029597A1 Treatment of pulp with a chelating agent without using a bleaching tower
07/09/1998CA2275257A1 Treatment of pulp with a chelating agent without using a bleaching tower
07/08/1998EP0851914A1 Purified mannanase from bacillus amyloliquefaciens and method of preparation
07/07/1998US5776308 Method of softening pulp and pulp products produced by same
07/02/1998WO1998028488A1 Method and device for process control during bleaching of fibrous materials
07/01/1998EP0850307A1 Alkaliphilic and thermophilic microorganisms and enzymes obtained therefrom
07/01/1998EP0772702A4 Method for preparation of pigmented paper fibers and fiber products
07/01/1998EP0757732B1 Oxygen bleaching of cellulosic pulps
07/01/1998CN2285314Y High cut mixing and bleaching test device for intermediate concentration paper pulp
06/1998
06/30/1998US5772844 For uniform bleaching of high consistency pulp using ozone
06/30/1998US5771718 Concentrated washing machine
06/30/1998CA2121387C Method for bleaching lignocellulose-containing pulp
06/30/1998CA2058312C Refining assisting agent and refining method using the same
06/25/1998WO1998027269A1 Treatment process for cellulosic fibers
06/25/1998WO1998027262A1 Method and composition for increasing the strength of compositions containing high-bulk fibers
06/25/1998WO1998016682A3 Process for the co-production of dissolving-grade pulp and xylan
06/25/1998CA2273292A1 Treatment process for cellulosic fibers
06/25/1998CA2273290A1 Method and composition for increasing the strength of compositions containing high-bulk fibers
06/24/1998EP0820544A4 Treatments for inhibiting deposition in papermaking systems
06/24/1998EP0789798B1 Process for delignification and bleaching of chemical wood pulps
06/23/1998US5770711 Derivatized with 2,3-epoxysuccinic acid, 1,2-epoxypropane-1,2,3-tricarboxylic acid, and or 2-(epoxyethyl)succinic acid; crosslinking
06/23/1998US5770012 Mixture of cellulase and xylanase enzymes
06/23/1998US5770011 Neutral monoperoxysulfate bleaching process
06/23/1998US5770010 Pulping process employing nascent oxygen
06/18/1998WO1998026128A1 Method for storing and transporting cellulosic and process for manufacturing pulp
06/18/1998WO1998026127A1 Multicomponent system for modifying, decomposing or bleaching lignin, lignin-containing materials or similar substances, and process for using the same
06/18/1998CA2271937A1 Multicomponent system for modifying, decomposing or bleaching lignin, lignin-containing materials or similar substances, and process for using the same
06/17/1998EP0847460A1 Method for preventing accumulation of metals in a closed pulp bleaching process
06/16/1998US5766926 Pitch degradation with wood colonizing bacteria
06/16/1998US5766415 Process for delignification and bleaching of chemical wood pulps with peroxide and dicyandiamide activator
06/16/1998US5766414 Method of bleaching cellulose pulp with peroxide under elevated pressure in a first vessel and atmospheric pressure in second vessel
06/16/1998CA2168063C Continuous dynamic mixing system and methods for operating such system
06/13/1998CA2223987A1 Improved wood pulp bleaching process
06/11/1998WO1998024971A1 Compositions and methods for inhibiting organic contaminant deposition in pulp and papermaking systems
06/10/1998EP0846753A1 Use of Alanine-N,N-diacetic acid and salts as biodegradable complexing agents as alkaline earth and heavy metal ions in alkali detergent compositions and washing process in drinking and foodstuff industrie
06/10/1998EP0846199A1 Treatment of pulp with chelating agent in at least two mixing steps without intermediate washing
06/10/1998EP0846198A2 Method and apparatus for bleaching high consistency pulp with a gaseous bleaching reagent
06/10/1998DE19651099A1 Mehrkomponentensystem zum Verändern, Abbau oder Bleichen von Lignin, ligninhaltigen Materialien oder ähnlichen Stoffen sowie Verfahren zu seiner Anwendung Multi-component system for modifying, degrading or bleaching lignin, lignin-containing materials or similar substances and to processes for its application,
06/09/1998US5763260 Method to alter the properties of acetylated xylan
06/09/1998US5762760 Reactor for treating pulp with a gas
06/09/1998US5762758 Method of papermaking having zero liquid discharge
06/09/1998US5762757 Adding to pulp a blend of dioctyl sulfosuccinate and didecyl sulfosuccinate
06/04/1998WO1998023814A1 Production of soft paper products from coarse cellulosic fibers
06/04/1998WO1998023811A1 Bleaching of cellulosic pulp with ozone and peracid
06/04/1998WO1998023810A1 Method for controlling oxygen delignification of pulp
06/04/1998CA2270967A1 Bleaching of cellulosic pulp with ozone and peracid
06/04/1998CA2269871A1 Production of soft paper products from coarse cellulosic fibers
06/03/1998EP0775226B1 Concentrate of stabilisers for aqueous bleaching and treating solutions based on hydrogen peroxide and/or other inorganic and/or organic peroxo compounds
06/03/1998EP0720674B1 A device for distributing liquid, especially washing liquid for washing paper pulp
06/02/1998US5759840 Modification of xylanase to improve thermophilicity, alkalophilicity and thermostability
05/1998
05/27/1998EP0844328A2 Process for improving the selectivity in the delignification of a chemical pulp
05/27/1998EP0843757A1 Method for reprocessing an ozone-containing gas present in a pulp bleaching plant
05/27/1998EP0843723A1 Method for enhancing the activity of an enzyme, compounds showing enzyme activity enhancement, and detergents containing such compounds
05/26/1998US5755926 Oxidizing, bleaching in alkaline slurry, dissolving lignin, decompression by discharging, separating the adhesive from fibers; recycling/wastes/
05/26/1998US5755925 Brightness stabilization
05/26/1998US5755828 Method and composition for increasing the strength of compositions containing high-bulk fibers
05/22/1998WO1998021400A1 Prebleaching of paperpulp before a peroxide bleaching stage
05/20/1998EP0842321A1 Method of stabilizing peroxide-containing alkaline bleach liquors for bleaching cellulose and other fibrous materials
05/20/1998CN1182148A Digestion-less and sieving-free chemical pulp-making method producing no nuisance
05/19/1998US5753074 Method of washing a thin mat of cellulosic pulp
05/19/1998US5753007 Oxygen production by ion transport membranes with non-permeate work recovery
05/14/1998WO1998020199A1 Vanadyl catalyzed oxygen treatment of lignocellulosic materials
05/14/1998WO1998020198A1 Method of producing pulp using single-stage cooking with formic acid and washing with performic acid
05/13/1998EP0840820A1 Method and apparatus for bleaching pulp with a gaseous bleaching reagent
05/13/1998EP0840625A1 Absorbent material, absorbent body made of the material, and method for the preparation of the material
05/13/1998EP0726979B1 Process for bleaching a chemical pulp
05/13/1998EP0683686B1 Multistage disc filter
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