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Patent Searching and Data


Matches 451 - 500 out of 2,244

Document Document Title
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 The first impregnation liquor withdrawn from the digester is rich in dissolved calcium-containing material.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/2000/073572A1
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/2000/073573A1
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/2000/073575A1
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/2000/073574A1
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/2000/068494A1
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...  
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/2000/028133A1
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...  
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...  
WO/2000/024962A1
The invention concerns a method for repulping paper by contacting an aqueous paper suspension with at least a paracid for a time interval of less than 15 minutes to obtain raw pulp followed by a subsequent treatment to obtain a defibrate...  
WO1999063149A8
Disclosed is a method for delignifying lignocellulosic materials by first treating the material with an alkaline solution in the presence or absence of anthraquinone, and then exposing the material to a polyoxometalate. Inclusion of the ...  
WO/2000/020677A1
The present invention is a soybean hull fiber from which polyphenolics or lignin has been removed, having cellulose and hemicellulose, wherein the improvement is that the cellulose and hemicellulose are dissociated as a delignified soybe...  
WO/2000/019004A1
A process for producing unbleached pulp suitable for the production of bleached paper from a feedstock comprising subjecting the feedstock to a steam explosion process in a reactor at a semi-alkaline pH to produce pulp.  
WO/2000/017444A1
A novel pulping process has been discovered whereby acid is added to the black liquor mixture. The acid renders the lignin insoluble thus enabling it to be separated from the black liquor. The invention obviates the need for a recovery b...  
WO/2000/012436A1
Improved process for inhibiting calcium carbonate scaling in aqueous systems such as that employed in the Kraft pulping process. Such an improved process is achieved by the addition of at least one antiscalant comprising one monomer unit...  
WO/2000/012810A1
A method for preparation of a fibrous stock suitable for manufacture of paper out of herb-stemmed plants, such as, for example, straw or flax. The method comprises steps in which the fibrous raw-material is cut into chips, cooked, and bl...  
WO/2000/011239A1
A method for controlling corrosion of metals, particularly ferrous-based metals in contact with aqueous systems is disclosed, which includes treating industrial waters with a tetrazolium salt of general formula (I) wherein R¿1?, R¿2?, ...  
WO/2000/011261A1
A method for continuous cooking of lignocellulosic fibre material, comprising the steps of sequentially (a) in a first stage, impregnating the fibre material in an impregnation liquid comprising alkali metal hydroxide, and thereafter wit...  
WO/2000/011260A2
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/2000/011263A1
The present invention relates to a method of preventing scale formation in a pulping process of chemical pulp. The method comprises at least the following steps: a) comminuted cellulosic fibrous material is treated with cooking liquor at...  
WO/2000/011259A2
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/2000/005310A1
A process and materials are described in which highly refined cellulose fibers are broken down into microfibers and further processed into compositions, films, coatings and solid materials which are biodegradable and even edible. The pro...  
WO/2000/003083A1
The invention relates to a process for enhancing the concentration of the fibre derived dissolved and colloidal substances in process water that comes from mechanical pulping. According to the invention, process water is treated with enz...  
WO/1999/063152A1
Method and improving causticizing efficiency in the conventional lime recausticization portion of alkaline pulping processes, such as are commonly used in the pulping and bleaching of wood and non-wood cellulose fiber materials. An aqueo...  
WO/1999/063149A1
Disclosed is a method for delignifying lignocellulosic materials by first treating the material with an alkaline solution in the presence or absence of anthraquinone, and then exposing the material to a polyoxometalate. Inclusion of the ...  
WO/1999/063151A1
A method is provided for the use of borates in the recausticization of alkali-containing liquors such as those produced in the chemical and semi-chemical pulping of wood and in the oxidation and bleaching of wood pulp. Sodium hydroxide i...  
WO1999045191A9
Chemical cellulose pulp (e.g. kraft pulp) is produced with enhanced strength and/or yield using a strength or yield enhancing additive such as polysulfide or anthraquinone or its equivalents or derivatives, and in a manner that allows ef...  
WO/1999/057364A1
The invention relates to a process based on formic acid cooking for producing pulp from herbaceous plants and deciduous trees by using acetic acid as an additional cooking chemical. The obtained pulp can be used in fine paper and board p...  
WO/1999/047248A1
Methods for controlling wax and other contaminants by improving the dispersion of these materials through the addition of contaminant dispersants to the process of recycling paper and paperboard are disclosed. A preferred contaminant dis...  

Matches 451 - 500 out of 2,244