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7384502 Process for impregnating, refining, and bleaching wood chips having low bleachability to prepare mechanical pulps having high brightness  
Wood chips having low bleachability are impregnated with a chemical liquor at a pH range of 7-12 in aqueous solution and the chemical liquor from the impregnated chips is drained, whereby...
7306698 Method for producing pulp  
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,...
7294227 Method and system for the treatment of pulp prior to ozone bleaching  
A system for treating pulp comprises a dewatering device ( 2 ) for dewatering the pulp to a fiber concentration of at least 20%, a closed pulp-shredding vessel ( 16 ) for shredding the dewatered...
7229525 Methods to enhance pulp bleaching and delignification  
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...
7182836 Method for delignifying lignocellulosic raw materials  
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...
7037405 Surface treatment with texturized microcrystalline cellulose microfibrils for improved paper and paper board  
The present invention relates to the production of texturized microcrystalline cellulose from raw pulp material. This texturized microcrystalline cellulose can then be used for surface treatment of...
7018509 Elimination of alum yellowing of aspen thermomechanical pulp through pulp washing  
This invention relates to an improved process for manufacturing bleached thermomechanical aspen pulp having reduced yellow after treatment with aluminum based chemicals such as alum which are used...
7008505 Eucalyptus biomechanical pulping process  
In a new process for preparing pulped wood chips for paper making, chips from a hardwood such as eucalyptus are inoculated with aliving culture of one or more white rot fungi. The fungi propagate...
7005034 Method in connection with the production of mechanical pulp  
A method in connection with the production of mechanical pulp from a cellulose containing material wherein the material is processed in at least one refining step to produce pulp. According to the...
6761798 Method for forming an Arundo donax paper product  
Composite panels and pulp, and paper products of the pulp, are produced from Arundo donax. In the fabrication of the composite panels, Arundo donax is comminuted to a suitable size, combined with a...
6632326 Modifying method for wood elements  
The present invention's modifying method for wood elements includes a step for soaking wood elements in one or a mixture of acetic anhydride, acetic acid, or chloroacetic acid; and a step for...
6419786 Method for bleaching wood pulp containing recycled paper  
A method of treating wood-fiber pump, particularly wood-fiber pulp that contains recycled paper, comprises delivering the pulp to and advancing the pulp in a heating zone while delivering steam to...
6409841 Process for the production of organic products from diverse biomass sources  
Disclosed are processes and systems for the production of useful organic product from diverse lignocellulose-containing biomass having increased yield and efficiency over existing processes. In...
6402887 Biopulping industrial wood waste  
A method using biological processes in the production of pulp from industrial wood waste is described. The process makes use of various species of white-rot fungi which selectively degrade lignin....
6364999 Process for producing a wood pulp having reduced pitch content and process and reduced VOC-emissions  
Paper and absorbent products having reduced pitch content and enhanced properties, including increased tensile index, tear index, burst index, Scott Bond, smoothness, and stiffness. Further, pulps...
6344108 Using a dicarboxylic acid dialkyl ester brightening  
A process for producing fibrous materials for the manufacture of cellulose, paper or wood materials by using at least one dicarboxylic acid dialkyl ester and/or a copolymer of polyester-polyether...
6340408 Method of preparation of a fluffed pulp to be used in absorbent products  
A method for the preparation of cellulosic pulp capable of being defibrated (fluffed) for the manufacture of an absorbent material intended to be incorporated as a component in absorbent products....
6277240 Method for continuously pulping cellulosic fibrous material  
In the production of chemical pulp, such as kraft pulp, it is possible to reduce the amount of ancillary equipment, and/or the size of the continuous digester vessel, while achieving enhanced...
6267841 Low energy thermomechanical pulping process using an enzyme treatment between refining zones  
A low energy thermomechanical pulping process which employs an enzyme treatment stage between two low energy thermomechanical stages.
6214164 Process for pretreating wood chips for pulping  
The invention relates to a process and apparatus for pretreating pulp raw material, to be subsequently prepared in a chemical pulping process, and for preparing cellulose pulp from a fibrous...
5879510 Light drainability, bulky chemimechanical pulp that has a low shive content and a low fine-material content  
A chemimechanical pulp for use in the manufacture of paper or paperboard products where a high drainability, bulky pulp is desired. The pulp has a long fiber content of between 60 and 75%, a...
5718802 Process for obtaining cellulosic fiber bundles at least 2.5 cm long from plant stalk rind  
Novel fiber bundles may be produced as a by-product of sugar cane or other plants. These fiber bundles may be spun into a yarn, or formed into a non-woven mat. The non-woven mat is useful, for...
5628830 Enzymatic hydrolysis of biomass material  
A method of producing sugars and converting the sugars to ethanol in which particulate biomass resulting from hydrolysis of the hemicellulosic content of the biomass is subjected to enzymatic...
5622597 Process for deinking of recycled paper  
A process for deinking recycled paper using a pressurized deinking module to separate ink from paper pulp stock. The addition of salts of imidazolinium based compounds with alkyl, alkenyl and...
5607546 CTMP-process  
An absorbent, chemithermomechanical pulp produced from lignocellulosic material with a wood yield above 88%, a low resin content <0.15%, a long fiber content above 70%, a short fiber content...
5536325 Method of treating biomass material  
Two stage hydrolysis of lignocellulosic material, conditions during the first stage being such as to hydrolyze or depolymerize the hemicellulosic component without substantial degradation of...
5338402 Process for preparing a bleached chemithermomechanical pulp  
A process for preparing chemithermomechanical pulp comprising subjecting a lignocellulosic substance from which said pulp is to be formed to the simultaneous action of a sulfite and a reducing...
5338405 Production of fiber pulp by impregnating the lignocellulosic material with an aqueous alcoholic SO.sub.2 solution prior to defibration  
In a process for manufacturing chemo-mechanical and/or chemothermal-mechanical wood pulps, raw materials containing lignocellulose, such as wood shavings, wood chips, pre-ground wood or sawdust,...
5314583 Process for the comminution of materials and plant for carrying out the process  
A process for the comminution, in particular defibrillation, and reaction of fibrous materials having a high dry solids content with the addition of a circulating medium, preferably a carrier gas...
5267655 Method and apparatus for treating a gas containing aqueous fiber suspension  
Method and apparatus for treating a gas containing aqueous fiber suspension in a fiber line process of a pulp mill including at least one of pulp screening, washing and bleaching includes (a)...
5227021 Method for producing pulp using medium consistency mixer for defiberizing pulp  
A method of defiberizing fibrous cellulosic material bound by chemical bonds and physical force comprising treating the fibrous cellulosic material in a treatment apparatus so as to loosen the...
5164042 Method and plant for producing high-yield pulp from pulp chip material containing lignocellulose  
In a method of producing high-yield pulp from pulp chip material containing lignocellulose the material is treated with steam in a steam treating station (1) for driving air out of the material and...
5129987 Process for bleaching mechanical wood pulp with sodium hydrosulfite and sodium hydroxide in a refiner  
A paper pulp refining and bleaching process wherein the pulp is treated in one or more refiners with a sodium hydrosulfite bleach liquor in the presence of a strong alkali such as NaOH, whereby the...
4983256 Method for the manufacture of a paper pulp for currency use  
In the method for the manufacture of a paper pulp for currency use from a stock comprising textile fibers, the operations of boiling, bleaching, chopping, breaking, cutting and washing of the...
4968385 Method of preparing a plup using a fluidizing centrifugal pump during impregnation  
A method of preparing a pulp for digestion in a continuous process from a fiber-containing cellulose material is described. It comprises the following sequential steps: (a) preimpregnating the...
4966651 Method of paper making using an abrasive refiner for refining bleached thermochemical hardwood pulp  
An improved paper for printing and other uses can be made from a paper pulp that contains pulp derived from hardwoods if the pulp is refined in a refiner that has at least one abrasive surface...
4941943 Process for preparing sodium carboxy-methyl cellulose  
The invention relates to a method and an equipment for preparing NaCMC, in which (a) cellulose is slushed in the reaction medium until a consistency of c. 5-15%, preferably 5-10%, (b) the fibre...
4812206 Process for bleaching lignocellulosic matter  
A process for bleaching a lignocellulosic matter in the form of a mechanical, thermomechanical, chemicomechanical or chemicothermomechanical papermaking pulp, or of wood chips while being converted...
4787959 Process for preparing chemical paper pulps by cooking, intermediate grinding and a final alkaline peroxide delignification  
A process of preparing new chemical paper pulps wherein a first cooking stage is effected in the presence of sodium hydroxide and advantageously adjuvants, after which an intermediate grinding is...
4767499 Method for the production of fiber pulp by impregnating lignocellulosic material with a sulphonating agent prior to refining  
A method for the production of fiber pulp from lignocellulosic material containing at least 70% spruce or spruce-like material. The method comprises the steps of lignin softening and...
4756799 Method of manufacturing bleached chemimechanical and semichemical fibre pulp by means of a one-stage impregnation process  
In accordance with the invention a chemimechanical pulp is produced from lignocellulosic material, for example wood chips, by subjecting the material to a process in which it is steamed,...
4743338 Method of removing air from lignocellulosic material by passing the material through conduit paths of different diameters  
Air is removed from wood chips, and they are impregnated by treatment liquid, in a process that is an alternative to presteaming and is particularly applicable to environments where presteaming is...
4699691 Thermomechanical digestion process  
A process for thermomechanical digestion using a multiple blowdown technique. The digestion chemical is added just prior to blowdown which results in a concentration of digesting chemicals on the...
4689117 Thermomechanical digestion process for enhancing the brightness of cellulose pulp using bleachants  
The brightness of a thermomechanical pulp can be improved if a serial multiple blowdown technique is used and a bleachant is present at an effective concentration throughout the thermomechanical...
4634498 Method for the production of high density fiberboard  
High strength and high density wood fiberboard is formed by treating the wood fiber source material with a highly alkaline solution, such as sodium hydroxide solution, before interfelting the...
4599138 Process for pretreating particulate lignocellulosic material to remove heavy metals  
A process is provided for pretreating particulate lignocellulosic material to remove heavy metals and resin without any delignification or defibration, which comprises washing particulate...
4486267 Chemithermomechanical pulping process employing separate alkali and sulfite treatments  
A high yield chemithermomechanical (CTMP) process for obtaining high strength hardwood pulps is disclosed wherein hardwood chips are subjected to a two-stage chemical treatment prior to...
4435249 Process for the oxygen delignification of pulp mill rejects  
Rejects such as knots, shives, slivers, chops, and uncooked and partially cooked wood chips are separated from a pulp slurry and treated to produce a bleachable grade pulp. The rejects are...
4406734 Method for the manufacture of mechanical pulp  
A method and a device for the manufacture of mechanical pulp from lignocellulosic material by forcing the said material into contact with a grindstone (1) which revolves about an axle (2). The...
4372810 Method and device for manufacturing mechanical pulp  
A method and a device for the manufacture of mechanical pulp from lignocellulosic material by forcing the said material into contact with a grinding disc (1) which revolves about a central axle (2)...
Matches 1 - 50 out of 82 1 2 >