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)
09/1992
09/02/1992	EP0318569B1 Process and installation for industrial production of stabilized aggregates
09/02/1992	EP0231275B1 Use of ligninolytic enzymes in paper pulp production
09/01/1992	US5143581 Method of peroxide bleaching of pulp pretreated with a sequestering agent then with a sulphite and reducing agent
09/01/1992	US5143580 Process for reducing the amount of halogenated organic compounds in spent liquor from a peroxide-halogen bleaching sequence
08/1992
08/29/1992	CA2061940A1 Aluminum hydroxychloride as pitch control agent
08/27/1992	DE4105803A1 Fibre suspension compression appts. - has high-speed continuous sieve belt round a grooved roller and a perforated hollow cylinder
08/26/1992	EP0499618A1 Hydrolysis of resin in pulp.
08/26/1992	CN1063915A Method and apparatus for treating fibrous materials with gaseous reagent
08/20/1992	WO1992013992A1 Procedure for controlling oxygen-alkali bleaching
08/20/1992	WO1992013991A1 High efficiency chlorine dioxide pulp bleaching process
08/20/1992	WO1992013960A1 Solid state culture of white rot fungi
08/20/1992	WO1992013942A1 Xylanase, xylanase-producing bacillus and applications thereof
08/20/1992	CA2101752A1 High efficiency chlorine dioxide pulp bleaching process
08/20/1992	CA2101063A1 Xylanase, xylanase-producing bacillus and applications thereof
08/20/1992	CA2101057A1 Solid state culture of white rot fungi
08/19/1992	CN1063732A Paper making method by all stem pulp making
08/18/1992	US5139613 Single stage bleaching, treatment with carbon dioxide solution as acidifying agent
08/18/1992	CA1306570C Pitch control aid in paper making
08/13/1992	WO1992013993A1 Bleaching of lignocellulosic material with activated oxygen
08/13/1992	DE4203131A1 Bleaching fibrous material - uses gas reagent suspension with opened fibres for mechanical mixing for reaction and porous bed to complete reaction and remove surplus gas
08/12/1992	EP0497794A1 A microperoxidase preparation containing a hemopeptide as an active component.
08/11/1992	US5137537 Disposable products
08/07/1992	CA2046717A1 Method and apparatus for treating fibrous materials with a gaseous reagent
08/06/1992	WO1992013130A1 Method for avoiding pitch troubles by use of thermostable lipase
08/05/1992	EP0496905A1 Lignosulfonates for combatting slimy deposits in closed water loop plants, process of preparation and their use
08/05/1992	EP0496827A1 Chlorine dioxide pulp bleaching process using sequential chlorine addition
08/05/1992	EP0483163A4 Environmentally improved process for bleaching lignocellulosic materials
08/04/1992	CA1305887C Apparatus for the treatment of a fibrous board or layer of material passed between two endless foraminous belts or wires
08/02/1992	WO1992013849A1 Pulping of lignocellulosic materials and recovery of resultant by-products
08/02/1992	CA2101754A1 Pulping of lignocellulosic materials and recovery of resultant by-products
07/1992
07/29/1992	EP0496671A1 Enzymatic treatment of a chemical ligno-cellulosic pulp
07/29/1992	EP0495836A1 Dye transfer inhibition.
07/28/1992	US5133946 Process for bleaching cellulosic materials and plant for carrying out the process
07/26/1992	CA2059788A1 Enzyme mediated treatment of a chemical lignocellulosic pulp
07/22/1992	WO1992013131A1 Process for bleaching pulp
07/22/1992	CN1062939A Method for making artificial fibre pulp and xylitol using corn stalk as material
07/22/1992	CA2076679A1 Method of pulp bleaching
07/16/1992	DE4101856C1 Dewatering device partic for sludge of paper fibres
07/15/1992	EP0494519A1 High yield pulping process
07/15/1992	CN1062758A Process for increasing bleaching efficiency of inorganic persalt
07/14/1992	US5129987 Process for bleaching mechanical wood pulp with sodium hydrosulfite and sodium hydroxide in a refiner
07/14/1992	US5129119 Diffuser efficiency
07/08/1992	CA2057231A1 Method of pretreating lignocellulosic materials prior to alkaline peroxide high yield pulping
07/07/1992	US5127992 Elimination of bleach effluents
07/04/1992	WO1992012289A1 Chlorine-free process for bleaching lignocellulosic pulp
07/04/1992	WO1992012288A1 Split alkali addition for high consistency oxygen delignification
07/04/1992	CA2099881A1 Chlorine-free process for bleaching lignocellulosic pulp
07/04/1992	CA2077433A1 Split alkali addition for high consistency oxygen delignification
07/01/1992	EP0493066A1 Pitch control
07/01/1992	EP0492600A1 Refining assisting agent and refining method using the same
07/01/1992	EP0492040A1 Tumbling ozone reactor for paper pulp
07/01/1992	EP0492039A1 Pneumatic reactor ozone bleaching of paper pulp
07/01/1992	EP0492000A1 Process for increasing the bleaching efficiency of an inorganic persalt
07/01/1992	CN1062391A High-pressure concentrator for scouring paper pulp
06/1992
06/30/1992	US5126009 Pretreatment of pulp with effluent recycle
06/30/1992	CA1304248C Apparatus and method for thickening pulp and paper stock
06/29/1992	CA2058378A1 Process for increasing the bleaching efficiency of an inorganic persalt
06/28/1992	CA2044907A1 Pneumatic reactor ozone bleaching of paper pulp
06/25/1992	CA2058184A1 Pitch control
06/24/1992	EP0491111A1 Atmospheric diffuser improved lower screens backflushing
06/23/1992	US5124029 Method of and device for fractionating suspensions
06/23/1992	US5123962 Finely divided suspension of cellulosic material
06/22/1992	CA2044898A1 Tumbling ozone reactor for paper pulp
06/18/1992	CA2045005A1 Atmospheric diffuser improved lower screens backflushing
06/16/1992	US5122354 Stable solid crystal for bleaching, sterilization
06/16/1992	US5122229 Apparatus and method for washing cellulosic pulp
06/12/1992	CA2054835A1 Hydrogen peroxide bleach stabilization system
06/11/1992	WO1992009741A1 Method for bleaching pulp
06/10/1992	EP0489104A1 Process for treatment of lignocellulosic pulp.
06/09/1992	US5120398 For medium to high consistency; drop leg replacment
06/03/1992	EP0487557A1 Improvement of oxygen bleaching of pulp.
06/02/1992	US5118389 High brightness; using hydrogen peroxide
06/02/1992	CA1302018C Lignocellulosic material bleeching process
05/1992
05/29/1992	WO1992008842A2 Method for producing dietary fibers from nonwoody lignocellulosic substrates by oxidation
05/27/1992	CN1061452A Pulpingy process
05/26/1992	US5116476 Atmospheric diffuser improved lower screens backflushing
05/26/1992	US5116474 Cellulase, hemicellulase
05/26/1992	US5116423 Apparatus for washing pulp
05/26/1992	CA1301412C Method in the activation of lignocellulosic material with a gas containing nitrogen dioxide
05/20/1992	EP0485829A1 Oxygene bleaching
05/20/1992	CN2104878U Electrochemical bleaching machine for paper pulp
05/19/1992	US5114534 Drying cellulosic pulp
05/14/1992	WO1992007998A1 Method for bleaching pulp
05/13/1992	EP0485074A1 Pulp bleaching solution
05/13/1992	EP0484398A1 Cell wall loading of never-dried pulp fibers.
05/12/1992	CA1300322C Method of bleaching or delignification of cellulose pulp with oxygen
05/12/1992	CA1300321C Gas diffuser
05/12/1992	CA1300320C Pulp bleaching
05/10/1992	CA2051470A1 Pulp bleaching solution
05/06/1992	EP0483170A1 Stabilized aqueous solution of hydrogen peroxide and preparation method.
05/06/1992	EP0483164A1 A ground fault circuit interrupter.
05/06/1992	EP0483163A1 Environmentally improved process for bleaching lignocellulosic materials.
05/05/1992	CA1300128C Freeze dried, cross-linked microfibrillated cellulose
04/1992
04/29/1992	CN2102950U Horizontal stainless steel spiral net with vacuum pulp machine
04/27/1992	WO1992007999A1 Pulp bleaching reactor and method
04/25/1992	WO1992007994A1 Pulping process
04/21/1992	US5106456 Rotor arranged in high consistency pulp-containiung space for homogenizing and facilitating flow
04/18/1992	WO1992007139A1 Method for preserving the mechanical strength properties of chemical paper pulp
04/18/1992	WO1992007138A1 Hydrolysis of resin in pulp
04/18/1992	CA2094296A1 Hydrolysis of resin in pulp

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