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Matches 551 - 600 out of 2,444

Document Document Title
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...  
WO/2000/068494A1
The invention concerns a method for producing paper pulp from a lignocellulosic vegetable raw material. Said method consists in contacting said raw material with a mixture of formic acid and acetic acid (in an amount more than 5 wt. % of...  
WO/2000/061858A1
The invention relates to a method for separating lignocellulose-containing biomass, especially wood, into the essential components in the form of lignin, hemicellulose and cellulose, with the following steps: a) pre-hydrolyzing the ligno...  
WO/2000/061276A1
A multi-function process for hydrolysis and fractionation of lignocellulosic biomass to separate hemicellulosic sugars from other biomass components comprising extractives and proteins; a portion of a solubilized lignin; cellulose, gluco...  
WO/2000/051708A1
Polyester water-based defoamers are prepared by reaction of a dimer fatty acid, a fatty acid and two different polyalkylene polyols, e.g. polypropylene glycol and polyethylene glycol. The resulting polyesters are readily dispersible in w...  
WO/2000/050689A1
The present invention relates to a method for producing kraft cellulose that involves preparing a highly-selective polysulphide alkali liquor by oxidising a white alkali liquor in a new heterogeneous catalyst A, B or C. The wood is then ...  
WO/2000/047812A1
The process of the present invention relates to a substantially sulfur free process for the manufacturing of a chemical pulp with an integrated recovery system for recovery of pulping chemicals. The subject process is carried out in seve...  
WO/2000/039390A1
Disclosed is a method for producing kraft wood fiber having an alpha-cellulose content greater than 97 % and a viscosity greater than 40 centipoise. The method involves prehydrolyzing hardwood chips with water, kraft cooking, bleaching a...  
WO/2000/034568A1
The invention relates to a method of obtaining alpha dissolving pulp from wood chips by steam pressure treatment and subsequent removal of the hemicelluloses and the lignin. The inventive method is characterized in that the chips are imp...  
WO2000011260A3
The present invention relates to a method for producing cellulose from a ligno-cellulosic material, wherein said method involves submitting this material to a high-temperature process in a sulfate alkali medium while acting on the alkali...  
WO/2000/028133A1
A process for the production of pulp using alkaline delignification is disclosed, wherein cellulosic material is initially treated with steam, and a chelating agent is added in connection with the steam treatment. The end pH of the steam...  
WO2000011259A3
This invention relates to a device for producing cellulose which includes the following: a cooking reactor which contains sulfate alkali liquor and a lignocellulose material; a DC source and electrodes in contact with the sulfate alkali ...  
WO/2000/025600A1
A method for processing straw pulp that includes caustic treatment is provided. The caustic treated straw pulp can be incorporated into a papermaking furnish to provide a paper product. The caustic treated pulp imparts strength to papers...  

Matches 551 - 600 out of 2,444