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Matches 351 - 400 out of 2,219

Document Document Title
WO/2004/090225A1
A method for washing sulphate cellulose pulp in the washing department of a sulphate cellulose mill, in which method a first pulp flow (1) is conducted to a first washer (101), where a washing liquid (12) is combined with the first pulp ...  
WO/2004/085735A1
Methods for bleaching cellulosic material such as cotton and wood pulp involve contacting the cellulosic material with a peroxide, oxygen or ozone bleaching agent, in the presence of a substituted guanadine-based additive. The substitute...  
WO/2004/078312A1
Block copolymers having two blocks and having the general formula (III) : R13[(OR14)j (OR 16)l OR 17]m wherein R13 is the residue of an organic initiator; R14 is one or more C2-C4 alkylene groups; R16 is one or more C2-C4 alkylene groups...  
WO2004044285A3
The present Invention comprises an improved method for refining cellulose that produces a highly refined cellulosic material. The method comprises soaking raw material from primarily parenchymal cell wall structures in an aqueous solutio...  
WO/2004/061224A1
A paper pulp is produced from a non-woodlike lignocellulose-containing biomass and has the following characteristics: the proportion of holocellulose is greater than 90 percent by mass with regard to the dry mass of the paper pulp; the p...  
WO/2004/057101A1
The present invention relates to a wood cooking aid which comprises a mixture of fatty acids and rosin acids and/or salts thereof in a ratio which is effective in removing the extractives in pulp production. The invention also relates to...  
WO/2004/044285A2
The present Invention comprises an improved method for refining cellulose that produces a highly refined cellulosic material. The method comprises soaking raw material from primarily parenchymal cell wall structures in an aqueous solutio...  
WO/2004/041995A1
According to one embodiment of the invention, a system (100) for processing biomass includes a water-impermeable bottom liner, a gravel layer (104) supported by the bottom liner (102), a drain pipe (106) disposed within the gravel layer ...  
WO/2004/029356A1
The present invention provides a method for obtaining a low molecular black liquor fraction comprising the following steps:a) separating black liquor into two fractions by using separation means with a cut off of approximately 100 kDa or...  
WO/2004/025020A1
The present invention relates to a new and environmentally sound process for the manufacturing of a chemical pulp from lignocellulosic material with an integrated recovery system for recovery of pulping chemicals. The process is carried ...  
WO/2004/016850A1
This invention relates to a novel on-line pulp digester control system. More particularly, this invention pertains to a novel control system which employs real time measurements from ion mobility spectrometry to automatically rapidly and...  
WO/2004/015195A1
This invention is a method of reducing the resin content of chemical pulps comprising heating wood chips in an aqueous alkaline medium in the presence of an effective deresinating amount of an alkyl alcohol alkoxylate of formula RO[(CH2C...  
WO/2004/007834A1
The invention relates to a continuous method for cooking cellulose-based pulp and to a pulp digester suitable for the method. In continuously operating cooking, the fi­brous pulp moves downwards in a vertical cooking vessel (1), whose u...  
WO/2004/005608A1
A method and apparatus for solvent pulping of cellulose containing biomass, comprising: a) at least one atmospheric steaming vessel (22) having a first outlet, b) at least one super-atmospheric impregnation vessel (28) operatively connec...  
WO/2004/005609A1
The invention concerns a method for the continuous cooking of pulp and a digester. At least two withdrawal positions (11E, 11D) for cooking fluid are arranged at different heights in the digester (10). The cooking fluid in the first and ...  
WO/2003/106765A1
The invention concerns a method and an arrangement for improved impregnation of chips in association with the manufacture of chemical cellulose pulp. Unsteamed chips are fed into an impregnation vessel (30) in which a fluid level (LIQ&lo...  
WO/2003/102296A1
The invention concerns a method for the production of cellulose pulp, in which wood raw material that principally comprises softwood, preferably in the form of cut wood chips, is treated in several stages in various treatment steps, wher...  
WO/2003/100166A1
Methods are provided for determining the yield and/or hygroscopicity of a pulp from the dimensions of fibers obtained from a sample of the pulp. The yield and/or hygroscopicity of softwoods and hardwoods may be calculated using the metho...  
WO2003048454A3
Enzyme-treated papermaking sludges are provided, as are methods of making the enzyme-treated sludge. Papermaking processes that incorporate the enzyme-treated papermaking sludges into papermaking pulp are also provided as are paper and p...  
WO/2003/097931A1
The invention concerns a simplified method for the continuous cooking of wood raw material in the form of sawdust for the production of cellulose pulp, in which method no thickening stages are required, and which can be carried out with ...  
WO/2003/095737A1
A method of producing a high quality paper pulp slurry from high silica content agricultural waste material. The method includes combining the agricultural waste materials with a chemical composition to form a mixture, cooking (21) the m...  
WO/2003/080924A1
The invention concerns a method for the modification of cellulose fibres with the aim of increasing the strength properties of the pulp. Cellulose derivative, preferably in the form of CMC, is added in associated with alkali cooking and/...  
WO/2003/078727A1
A method for feeding a chips slurry from a low- to a high-pressure system during the continuous cooking of chemical cellulose pulp. The feed takes place through a sluice feeder (53') between these systems. The sluice feeder is provided w...  
WO/2003/074781A1
The invention relates to a process for producing furfural, for forming formic and acetic acids and for recovering formic and acetic acids in a pulp making process, in which an acid mixture containing mainly formic and acetic acids is use...  
WO/2003/062524A1
The invention concerns a method during the cooking of cellulose pulp in which the raw material, preferably in the form of chips, undergoes a successive elevation of temperature towards the cooking temperature while the chips are first im...  
WO/2003/062525A1
A method for the continuous cooking of chemical pulp with the aim of achieving improved heat economy in a digester system comprising a vessel (1) for impregnation and a vessel (2) for cooking the impregnated cellulose chips. A part of th...  
WO/2003/060229A1
Process for continuously cooking chemical pulp in a digester system consisting of at least one vessel for impregnating and cooking comprising an inlet into which a mixture of chips and process liquid is fed. The chips are impregnated at ...  
WO/2003/057980A1
Methods of converting a sulfide in a composition to polysulfide are described, one method comprising the steps of exposing the composition to conditions and for a time sufficient to cause conversation of at least a portion of the sulfide...  
WO/2003/057979A1
The invention concerns a method for the manufacture of cooked cellulose pulp in which the starting material, preferably chips, undergoes a successive increase in temperature towards cooking temperature while the chips are first treated i...  
WO/2003/048454A2
Enzyme−treated papermaking sludges are provided, as are methods of making the enzyme−treated sludge. Papermaking processes that incorporate the enzyme−treated papermaking sludges into papermaking pulp are also provided as are paper...  
WO2002059417A3
Oxidized white liquor is heat treated to increase the concentration of PSUV measured at 285 or 286 nm or PSVIS measured at 416 nm and the PSUV/PSGR or PSVIS/PSGR ratio, whereby the content of active polysulphide in the total polysulphide...  
WO/2003/025280A1
The invention relates to a method for separating hemicelluloses out of biomass that contains hemicelluloses, particularly out of wood, and for extracting pulp. The method involves the following steps: (1) delignifying the biomass that co...  
WO2003002813A3
The invention relates to a method for delignifying lignocellulosic raw materials by using sulfites in the presence of an alkaline component, especially sodium hydroxide or sodium carbonate or a mixture thereof in an aqueous solution at a...  
WO/2003/023043A1
New mediators for use in laccase-mediator systems (LMS) are disclosed. The mediators enhance the activity of enzymes exhibiting laccase activity and can be used, for example, to bleach a dye in solution, to oxidize an appropriate compoun...  
WO2002075042A3
The invention relates to a method for separating hemicelluloses from a biomass containing hemicelluloses. Said method comprises the following steps: a) the hemicelluloses are extracted from the biomass containing hemicelluloses by means ...  
WO2001088236A3
The present invention provides compositions, useful for making lyocell fibers, having a high hemicellulose content, a low copper number and including cellulose that has a low average degree of polymerization (D.P.) and a narrow molecular...  
WO2002099184A3
Composition and method for improving properties of pulp produced or reducing the digester cycle time in alkaline chemical pulping processes in which an effective amount of at least one selected phosphonate or carboxylate compound or mixt...  
WO/2003/008703A1
A process for applying chemicals, such as an alkaline peroxide pretreatment (1) to lignocellulosic material before chemical refining and at the primary refiner (3). The preferred embodiment comprises (i) preconditioning at temperatures b...  
WO/2003/006737A1
The invention relates to a process for producing pulp from a fibre-based raw material using, as the cooking reagent, a solvent mixture which is based on organic acids and also contains furfural. The method is applicable to herbaceous pla...  
WO/2003/004765A1
According to the invention, the cellulose pulps for paper industry are made from stems of a plant of specie Sida hermaphrodita Rusby that is free from resins and fatty acids. This kind of raw material is very easy to obtain and is charac...  
WO/2003/002813A2
The invention relates to a method for delignifying lignocellulosic raw materials by using sulfites in the presence of an alkaline component, especially sodium hydroxide or sodium carbonate or a mixture thereof in an aqueous solution at a...  
WO/2002/099184A2
Composition and method for improving properties of pulp produced or reducing the digester cycle time in alkaline chemical pulping processes in which an effective amount of at least one selected phosphonate or carboxylate compound or mixt...  
WO/2002/098803A1
Compositions and method of improving inhibition of calcium salt scale formation under the conditions found in chemical pulp processes in which an effective amount of selected phosphonates or phosphonate blends is admixed with the black l...  
WO/2002/098802A1
Compositions and method for improving inhibition of calcium salt scale formation under the conditions found in chemical pulp processes in which an effective amount of selected phosphonates or phosphonate blends is admixed with the aqueou...  
WO/2002/090648A1
The invention relates to a feed arrangement for feeding chips to chip bins (1) in the production of cellulose pulp in continuous digesters (16), in which the chip bin is constituted by a greatment vessel having a top and a bottom, in whi...  
WO/2002/088460A1
A method to enhance brightness in Chemical and Mechanical pulps comprising adding an organic sulfide chelant is described and claimed. A method to enhance delignification in a Chemical pulp comprising adding an organic sulfide chelant is...  
WO/2002/088461A1
The invention relates to a method for supplying washing liquid to a digester (1) for cellulose pulp and a subsequent diffuser washing device (2a, 2b). A high, disturbance-free production capacity can be obtained by using a common feed pu...  
WO/2002/086206A1
The present invention provides compositions, useful for making lyocell fibers, having a high hemicellulose content, a low copper number and including cellulose that has a low average degree of polymerization (D.P.) (104), wherein greater...  
WO/2002/081816A1
The invention discloses a method of extracting extractives from wood chips. The method includes sterilization of wood chips under pressure and heat to obtain sterilized wood chips. The sterilized wood chips may be inoculated with selecte...  
WO/2002/075044A1
The invention relates to a continuous digester for producing chemical pulp, to a process for operating this digester and to a feedback system for the cooking liquid. By means of implementing cooking zones 1st, 2nd, 3rd, 4th and 5th down ...  

Matches 351 - 400 out of 2,219