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Matches 451 - 500 out of 2,303

Document Document Title
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 ...  
WO/2001/021882A1
A process for the production of chemical pulp, in which wood is treated with a cooking liquor essentially not containing any polysulphide, and in which, prior to the treatment, the cooking liquor does essentially not contain any carbonat...  
WO/2001/018278A1
A method for producing a polysulfide by subjecting a solution containing a sulfide to electrolytic oxidation in an electrolytic bath (1,2) equipped with anode chambers (11, 21) having anodes (13, 23), cathode chambers (14, 24) having cat...  
WO/2001/016423A1
A process for producing a pulp suitable for papermaking from a nonwood fiber source material. Representative nonwood fiber source materials include corn stover and wheat straw. The process includes the steps of providing a nonwood fiber ...  
WO/2001/014631A1
The invention relates to a compositions for increasing the mass absorption of polar systems in hydrophobic-hydrophilic hybrid materials containing (A) polar solvents and (B) surface-active organosilicon compounds selected from the group ...  
WO/2001/004362A1
The invention relates to a method of preparing chemical pulp and xylose by the use of alkaline or neutral cooking and post hydrolysis of the pulp by performing the post hydrolysis directly on the pulp by means of acid treatment. In the m...  
WO/2001/000923A1
A digestion assistant for lignocelluloses, containing one or more members selected from among nonionic surfactants represented by general formula (1): wherein R?1¿ is branched C¿4?-C¿24? alkyl, m is such integers of 1 or above as to g...  
WO/2000/077295A1
A digestion method for producing pulp which comprises digesting a lignocellulose material by using an alkaline digesting liquor containing polysulfides in the presence of a quinone-hydroquinone compound having a value obtained by reducin...  
WO/2000/077294A1
A digesting liquor for pulp, characterized in that when a standard chip is digested with the digesting liquor under a temperature profile predetermined for a standard digesting liquor at a liquor ratio of 3.0 L/kg (based on absolutely dr...  
WO/2000/073573A1
A continuous process for digesting a lignocellulose material using a one-vessel digestion apparatus, wherein a digester has, from the top towards the bottom thereof, an overhead zone, an upper digestion zone and a lower digestion zone, e...  
WO/2000/073574A1
Provided is a method for controlling foam formation, which method comprises contacting a substance with a foam-controlling agent comprising one or more ester compounds and wherein the foam controlling agent is capable of first suppressin...  
WO/2000/073572A1
A continuous process for digesting a lignocellulose material using a two-vessel digestion apparatus, wherein a permeation vessel is installed before a digester, the digester has, from the top towards the bottom thereof, an overhead zone,...  
WO/2000/073575A1
A method for producing chemical pulp from cellulosic material by means of alkaline cooking, including cooking the material to pulp at cooking temperature in a digester, reducing the temperature at the end of the cook, substantially relie...  
WO/2000/073578A1
A method for recovering chemicals in a process of producing pulp by the kraft process, characterized in that an alkaline solution containing Na¿2?S which flows in a process of producing pulp by the kraft process is electrolyzed by the e...  

Matches 451 - 500 out of 2,303