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Matches 451 - 500 out of 2,319

Document Document Title
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/2002/098802A1
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/2002/098803A1
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/2002/090648A1
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/2002/088461A1
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/2002/088460A1
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/2002/086206A1
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/2002/075043A1
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/2002/075044A1
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 ...  
WO/2002/075042A2
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/2002/059417A2
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/2002/053829A1
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/2002/052101A1
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/2002/042550A1
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/2002/042551A1
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/2002/036876A1
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/2002/029155A1
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/2002/016690A1
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/2002/014598A1
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/2002/012624A1
The invention refers to an aqueous sizing dispersion comprising a sizing agent, starch having aromatic groups and a condensed sulfonate, wherein the starch contains less than 95 weight % of amylopectin and a method of sizing paper compri...  
WO/2002/012626A1
The invention relates to a process for the production of paper from an aqueous suspen-sion containing cellulosic fibres, and optional fillers, which comprises separately adding to the suspen-sion a cationic organic polymer having one or ...  
WO/2002/012622A1
The present invention refers to a process for sizing paper which comprises adding to an aqueous suspension containing cellulosic fibres, and optional fillers, (i) a sizing dispersion comprising a sizing agent and a polymer having one or ...  
WO/2002/012623A1
The present invention refers to a process for sizing paper which comprises adding to an aqueous suspension containing cellulosic fibres, and optional fillers, (i) an anionic or cationic sizing dispersion; and (ii) a sizing promoter compr...  
WO/2002/010507A1
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/2002/010506A1
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 ...  
WO2001059202A3
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/2002/000995A1
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...  
WO2001059203A3
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/2001/092635A1
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...  
WO2001042555A3
The invention relates to a method for avoiding and/or reducing the deposition of volatile and non-volatile wood components in gas-bearing systems, whereby at least one of the volatile wood components, at least partly, condenses in the ga...  
WO/2001/088236A2
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/2001/086043A1
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 ...  
WO2001029308A8
The disclosed provides a process of modifying a seed based fiber (SBF) to form an enhanced fiber additive (EFA). The process includes an acid treatment step and optionally at least one fiber modification step. Preferred EFA products and ...  
WO/2001/059203A2
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/2001/059202A2
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/2001/059204A1
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/2001/049927A1
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/2001/048472A1
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/2001/046517A1
The present invention is a corn grain fiber from which corn starch has been removed, having cellulose and hemicellulose, wherein the improvement is that the cellulose and hemicellulose are dissociated as a delignified corn grain fiber. A...  
WO/2001/046516A1
The object of the present invention is a method for making mechanical pulp, such as thermomechanical or chemi-thermomechanical stock. The mechanical pulp is used as a raw material for printing paper, and its freeness value is 30-70 ml CS...  
WO/2001/046520A1
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...  
WO/2001/042555A2
The invention relates to a method for avoiding and/or reducing the deposition of volatile and non-volatile wood components in gas-bearing systems, whereby at least one of the volatile wood components, at least partly, condenses in the ga...  
WO/2001/042557A1
The object of the present invention is a method for making mechanical pulp, such as thermomechanical or chemi-thermomechanical stock. The mechanical pulp is utilised as a raw material for printing paper, and its freeness value is 30-70 m...  
WO/2001/032715A1
Disclosed are processes and systems for the production of useful organic products from diverse lignocellulose-containing biomass having increased yield and efficiency over existing processes. In particular, the present invention integrat...  
WO/2001/029308A1
The disclosed provides a process of modifying a seed based fiber (SBF) to form an enhanced fiber additive (EFA). The process includes an acid treatment step and optionally at least one fiber modification step. Preferred EFA products and ...  
WO/2001/025531A1
In a batch process for kraft pulp production, fouling of heat transfer surfaces is reduced. The first impregnation liquor withdrawn from the digester is rich in dissolved calcium-containing material. This material, when heated, releases ...  

Matches 451 - 500 out of 2,319