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Matches 351 - 400 out of 1,026

Document Document Title
WO/2003/100166
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...  
WO/2003/097931
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/2003/095737
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/2003/080924
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/2003/078727
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/2003/074781
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/2003/062524
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/2003/062525
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/2003/060229
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/2003/057980
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/2003/057979
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/2003/048454
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...  
WO/2003/025280
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...  
WO/2003/023043
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...  
WO/2003/008703
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/2003/006737
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/2003/004765
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/2003/002813
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/2002/099184
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/2002/098803
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/2002/098802
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/2002/090648
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/2002/088460
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/2002/088461
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/2002/086206
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/2002/081816
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/2002/075044
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 ...  
WO/2002/075042
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 ...  
WO/2002/075043
The present invention is a method for producing pulp from fibrous lignocellulose material using a treatment step which exposes the material to oxalic acid, or oxalic acid and sodium bisulfite, prior to pulping. The pulping of the resulti...  
WO/2002/059417
Oxidized white liquor is heat treated to increase the concentration of PS¿UV? measured at 285 or 286 nm or PS¿VIS? measured at 416 nm and the PS¿UV?/PS¿GR? or PS¿VIS?/PS¿GR? ratio, whereby the content of active polysulphide in the ...  
WO/2002/053829
The invention relates to a process for recovering and producing chemicals in a pulp production process where organic chemicals, such as formic acid and acetic acid, are used as cooking chemicals.The process of the invention is based on r...  
WO/2002/052101
The present invention relates to a process for preparing a bleached sulfite chemical pulp comprising: delignification of chips of a lignocellulosic material in a sulfite pulping process until the defibration point of said material is rea...  
WO/2002/042550
A continuous, alkaline process for the production of pulp from wood chips, wherein the preheated chips are subjected to an extended impregnation step for at least 60 min, preferably longer, at a temperature not exceeding the impregnation...  
WO/2002/042551
An alkaline batch process for the production of pulp from wood chips, wherein the preheated chips are subjected to an extended impregnation step outside the digester for at least 60 min, preferably longer, at a temperature not ex-ceeding...  
WO/2002/036876
This invention refers to a method for producing pulp in an alkaline digesting process comprising the following steps: charging lignocellulosic material to a digester system; pre-treating said lignocellulosic material with an impregnation...  
WO/2002/029155
The invention relates to a method for producing holocellulose, which contains cellulose and hemicellulose as the essential constituents, by the delignification of a biomass, in particular wood, containing lignocellulose. Said invention i...  
WO/2002/016690
The invention relates to a process-control method during the production of cellulose. According to said method, degradation products of the cellulose production contained in black lye are separated by sedimentation into the following thr...  
WO/2002/014598
A multi-function process for the separation of cellulose fibers (9) from the other constituents of lignocellulosic biomass such as found in grasses, agricultural waste, and waste paper with application in the preparation of feedstocks (1...  
WO/2002/010506
The invention relates to a process for digesting woodchips used in papermaking. The process employs digester additive, which comprises a sultaine or mixtures of a sultaine with a nonionic surfactant selected from the group consisting of ...  
WO/2002/010507
The invention relates to a process for digesting woodchips used in papermaking. The process employs a digester additive, which is a mixture of (a) a polyglycoside, and (b) a polyoxyalkylene glycol. The digester additives are compatible a...  
WO/2002/000995
The invention relates to a pulp preparing method and, more particularly, to a method for preparing a paper pulp form cornstalks including the steps of high-pressure cooking, beating, dispersion and drying performed in a moderate conditio...  
WO/2001/092635
Method for enabling the paper pulp production process to be controlled in such a way that the hexenuronic acid content in the pulp can be minimized and the colour reversion of the pulp and/or the pulp products thereby minimized. The meth...  
WO/2001/088236
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...  
WO/2001/086043
The invention is lyocell fiber characterized by a pebbled surface as seen at high magnification and having a variable cross section and diameter along and between fibers. The fiber is produced by centrifugal spinning, meltblowing or its ...  
WO/2001/059203
The present invention relates to a process for the removal of lignin from lignocellulose containing material comprising treating the lignocellulose containing material prior to a high-yield pulping process with a delignifying gas compris...  
WO/2001/059202
The present invention relates to a process for the removal of lignin from lignocellulose containing material comprising treating the lignocellulose containing material prior to a chemical pulping process with a delignifying gas, wherein ...  
WO/2001/059204
The process of the present invention relates to a substantially sulfur free process for the manufacturing of a chemical pulp from lignocellulosic material with an integrated recovery system for recovery of pulping chemicals. The subject ...  
WO/2001/049927
The invention relates to an improved method for controlling the cooking temperature in a continuous vapour phase digester for chip-shaped cellulose material. According to the invention high pressure can be established in the vapour phase...  
WO/2001/048472
A rapid method is provided for the on-line spectroscopic determination of lignin content and/or kappa number in wood pulps. Unlike currently available commercial instrumentation, the method enables one to measure lignin content independe...  
WO/2001/046520
The invention relates to a method for recuperating and/or isolating carboxylic acids from waste liquors derived from pulp production, these waste liquors containing carboxylic acids, lignin, water and optionally complex carbohydrates, fu...  

Matches 351 - 400 out of 1,026