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)
11/1996
11/07/1996WO1996035015A1 TREATMENT OF PULP WITH CHELATING AGENT AND SUBSEQUENT BLEACHING AT A pH VALUE ABOVE 9
11/07/1996WO1996034913A1 Pitch control composition and process for inhibiting pitch deposition
11/07/1996CA2219767A1 Treatment of pulp with chelating agent and subsequent bleaching at a ph value above 9
11/06/1996CA2170553A1 Treatment of filtrates in peroxide bleaching of pulp
11/05/1996US5571384 Method and arrangement for the treatment of a fiber suspension
11/05/1996US5571378 Removing transition metals from kraft pulp
11/05/1996US5571377 Process for peroxide bleaching of chemical pulp in a pressurized bleach vessel
10/1996
10/31/1996WO1996034147A1 Process for controlling the deposit of adhesive impurities from paper material suspensions
10/31/1996WO1996034144A1 Feeding and discharge of comminuted fibrous material
10/31/1996WO1996034142A1 Ambient temperature pulp bleaching with peroxyacid salts
10/31/1996DE19515273A1 Verfahren zur Kontrolle des Absetzens klebender Verunreinigungen aus Papierstoff-Suspensionen A method for controlling the deposition of stickies from paper stock suspensions
10/31/1996DE19515272A1 Controlling pptn. of resins from prim. cellulose fibre suspensions
10/31/1996CA2219759A1 Ambient temperature pulp bleaching with peroxyacid salts
10/31/1996CA2219139A1 A process for controlling the deposition of stickies from paper stock suspensions
10/30/1996EP0740015A1 Ethylenediaminetriacetic acid and salts thereof as chelating agents in pulp bleaching
10/30/1996EP0740014A1 Improved pitch control agent
10/30/1996EP0739434A1 Improved process for recycling bleach plant filtrate
10/30/1996CN1134726A An enzyme preparation comprising a modified enzyme
10/29/1996US5569180 Method for delivering a gas-supersaturated fluid to a gas-depleted site and use thereof
10/28/1996CA2173824A1 Ethylenediaminetriacetic acid and salts thereof as chelating agents in pulp bleaching
10/24/1996WO1996033308A1 Pulping process
10/24/1996WO1996033007A1 Device for admixing a first fluid into a second fluid
10/22/1996US5567279 Variable stage pressure diffuser
10/22/1996US5567274 Method of controlling pressurized ozone to a pulp delignification reactor
10/22/1996US5567262 Two stage pressure diffuser
10/17/1996WO1996032530A1 Treatments for inhibiting deposition in papermaking systems
10/16/1996CN1133622A Aminoalkane diphosphonic acids in pulp bleaching
10/09/1996CN1132810A Pulping technology
10/08/1996US5562806 Variable angle powered cyclone
10/08/1996US5562803 Sequential bleaching of de-inked paper pulp with sodium bisulfite, dithionite and borohydride
10/08/1996US5562740 Process for preparing reduced odor and improved brightness individualized, polycarboxylic acid crosslinked fibers
10/03/1996WO1996030586A1 Method and equipment for heating and pressuring a fibre pulp suspension during transportation to a bleaching reactor
10/03/1996WO1996030585A1 Pitch controlling agent and method for inhibiting pitch troubles
10/03/1996CA2191466A1 Pitch controlling agent and method for inhibiting pitch troubles
10/02/1996EP0734470A1 Method for the manufacture of bleached cellulose pulp
10/02/1996EP0734469A1 Implementation of dissolved solids profiling
10/02/1996EP0583310B1 Use of cellulase for pulp treatment
10/02/1996CN1132534A Method for reducing thermal and light-induced brightness reversion in lign in-containing pulps
10/01/1996US5560832 Demulsification of oily waste waters using silicon containing polymers
10/01/1996US5560805 Enhanced decolorization of waste paper with selected amines
10/01/1996US5560229 Diffuser
09/1996
09/25/1996CN1131713A Production of high-strength corrugated base paper with straw pulp by neutral ammonium sulfite process
09/24/1996US5558926 Endless multilayer fabric for densifying paper materials and production process thereof
09/24/1996CA2088502C Process for bleaching/sanitizing food fiber
09/19/1996WO1996028607A1 Process and device for treating, in particular bleaching, fibrous material
09/19/1996WO1996028606A1 Process for producing short-fibered softwood pulps
09/19/1996WO1996028605A1 Use of aminomethylene phosphono group-containing polymers as complexing agents
09/19/1996DE19508936A1 Komplexbildner für Papierindustrie Complexing agents for paper industry
09/18/1996CA2171595A1 Use of acid-stage filtrate in cooking liquor preparation
09/17/1996US5556976 Forming wet and dry resilient cellulose fibers with high absorbency, bulk and wet and dry resiliency for paper towels, diapers and sanitary products
09/17/1996US5556510 Method for inhibiting the deposition of organic contaminants in polp and papermaking processes
09/17/1996US5556508 Method for treating pulp
09/17/1996US5556200 Apparatus for mixing a first fluid into a second fluid using a wedge-shaped, turbulence-inducing flow restriction in the mixing zone
09/12/1996WO1996027705A1 Peroxide bleaching
09/12/1996WO1996027431A1 Apparatus for mixing a first fluid into a second fluid
09/11/1996EP0641403B1 Process for producing paper or paperboard with increased strength from mechanical pulp
09/11/1996EP0637351B1 Wood-free pulp and white paper product
09/10/1996US5554259 Pulp bleaching
09/10/1996US5554258 Flotation process for mechanical pulp using a surface active agent
09/06/1996WO1996027046A1 Method and apparatus for making paper pulp using basic processing effluents from a hydrogen peroxide production plant
09/06/1996WO1996027045A1 System and method for recycling materials
09/06/1996WO1996026898A1 Plant for producing hydrogen peroxide
09/06/1996WO1996026897A1 Apparatus for feeding hydrogen peroxide to a processing unit in an industrial facility
09/06/1996WO1996026896A1 Method and plant for producing hydrogen peroxide
09/06/1996WO1996026895A1 Plant for producing hydrogen peroxide in situ in a paper mill
09/06/1996CA2214087A1 Plant for the producing hydrogen peroxide
09/06/1996CA2214049A1 Apparatus for feeding hydrogen peroxide to a processing unit in an industrial facility
09/06/1996CA2213463A1 System and method for recycling materials
09/04/1996EP0729369A1 Method and apparatus for delivering oxygen into blood
09/03/1996US5552019 Oxidative delignification of wood or wood pulp by transition metal-substituted polyoxometalates
09/03/1996US5552018 Stabilized peroxyacid with phosphonic acids and salts for lignin removal
08/1996
08/29/1996WO1996019557A3 Use of hydroxyalkylaminocarboxylic acids as complexing agents
08/28/1996EP0728863A2 A process for treating liquids
08/28/1996EP0728239A1 Method of high yield paper pulp bleaching using hydrogen peroxide
08/28/1996EP0728238A1 Method of bleaching chemical paper pulp
08/28/1996EP0670929B1 Process for bleaching of lignocellulose-containing pulp
08/27/1996US5549791 Individualized cellulosic fibers crosslinked with polyacrylic acid polymers
08/27/1996US5549789 Oxidation of lignin and polysaccharides mediated by polyoxometalate treatment of wood pulp
08/27/1996CA2069447C Pulp alkali addition process for high consistency oxygen delignification
08/27/1996CA2069436C Pulp bleaching reactor and method
08/27/1996CA2068981C Two stage pulp bleaching reactor
08/27/1996CA2033077C Method for reducing chlorinated compounds produced during chlorination stage bleaching of pulp
08/22/1996WO1996025552A1 Method of pretreating pulp to be bleached with peroxide
08/22/1996WO1996018770A3 Multicomponent system for modifying, decomposing or bleaching lignin, lignin-containing materials or similar substances and method of using this system
08/21/1996EP0726980A1 A method of separating metal ions from pulp
08/21/1996EP0726979A1 Process for bleaching a chemical pulp
08/20/1996US5547570 Screening device
08/20/1996US5547543 Apparatus for minimizing effluent discharges and recovering chemicals in a pulp mill
08/20/1996US5547475 Mixture with stabilizer
08/20/1996US5547012 Dissolved solids control in pulp production
08/14/1996EP0725854A1 Aminoalkane diphosphonic acids in pulp bleaching
08/14/1996EP0725853A1 Multiple filter dynamic washer
08/14/1996EP0652991B1 Zero discharge pulp mill
08/13/1996CA2063351C Process for bleaching hardwood pulp
08/08/1996WO1996023977A1 A continuous dynamic mixing system and methods for operating such system
08/08/1996WO1996023929A1 Bleaching pulp with peroxide at superatmospheric pressure and in multiple stages
08/06/1996CA2057644F Medium consistency pulp ozone bleaching
08/01/1996WO1996023100A1 Stickies removal in wastepaper pulping
08/01/1996WO1996022964A1 Use of tri-acids based on alkoxylated tertiary amines as complex formers
08/01/1996DE19502294A1 Verwendung von Trisäuren auf Basis alkoxylierter teriärer Amine als Komplexbildner Use of triacids based on alkoxylated amines as complexing teriärer
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