| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 162024000 | Chemical treatment after start or completion of mechanical defibration | 12 |
| 20090145562 | Process for manufacturing pulp, paper and paperboard products - A process for bleaching mechanical wood pulp is provided comprising subjecting the wood pulp to at least one bleaching stage with one or more bleaching agents in the presence of one or more optical brightening agent, wherein the bleaching agents are selected from the group consisting of oxidative bleaching agents other than chlorine based bleaching agents such as chlorine dioxide, elemental chlorine or a combination thereof, reductive bleaching agents or any combination of two or more thereof. | 06-11-2009 |
| 20090288789 | MEDIUM CONSISTENCY REFINING METHOD OF PULP AND SYSTEM - A thermomechanical pulping method including: refining pulp with a high consistency refining stage, and a medium consistency refining stage processing the refined pulp discharge from the high consistency refining stage. Chemical pretreatments for improving pulp quality development during medium consistency refining can be optionally added at the pressurized chip press, fiberizer pre-refining step, primary high consistency refining step, and/or the standpipe feeding the medium consistency refiner. | 11-26-2009 |
| 20100084101 | METHOD FOR FUNCTIONALISING CARBOHYDRATES - The invention relates to a method for functionalising carbohydrates, that comprises at least one step during which the carbohydrates react with an oxidizing agent in the presence of copper-phenanthroline complex. The invention more particularly relates to a method for functionalising cellulose fibers for the paper industry. | 04-08-2010 |
| 20100132898 | PROCESS FOR THE PRODUCTION OF BLEACHED WOOD PARTICLES AND PALE TO WHITE WOOD-BASE MATERIALS - The present invention relates to a process for the production of bleached wood particles and a process for the production of pale to white wood-base materials which are produced from the bleached wood particles. | 06-03-2010 |
| 20100294443 | MANUFACTURING METHOD OF BAMBOO CHIP AND MANUFACTURING METHOD BAMBOO FIBER USING THE BAMBOO CHIP - There are provided a method for manufacturing a bamboo chip used to manufacture a natural fiber and a method for manufacturing a natural fiber using the bamboo chip. The method for manufacturing a bamboo chip includes steps of obtaining a soluble pulp from a bamboo chip; and manufacturing a rayon stable fiber from the soluble pulp using a viscose process as known in the prior art; and directly extracting only alpha-cellulose, in the form of fiber, from the bamboo chip by treating the bulky bamboo chip prepared in the present invention at a certain condition without undergoing a complicated process using raw materials for fiber articles as the rayon stable fiber. The alpha-cellulose in the form of fiber according to the present invention may be useful to apply to a variety of fields such as fibers, nonwoven fabrics and other sanitary articles, etc. | 11-25-2010 |
| 20110303372 | PROCESS FOR REDUCING SPECIFIC ENERGY DEMAND DURING REFINING OF THERMOMECHANICAL AND CHEMI-THERMOMECHANICAL PULP - A method for producing thermomechanical or chemi-thermomechanical pulp is provided. The process is characterized as having a reduced specific energy demand during refining. The process involves processing a pretreated wood material using one or more high consistency refining steps to produce a first pulp, optionally applying a chelating agent to the first pulp during HC refining to produce a stabilized pulp and treating the first or stabilized pulp with an alkaline-peroxide liquor to produce a treated pulp. The treated pulp is then processed by one or more second low consistency refining steps. Alternatively, the first pulp or stabilized pulp may be divided into a primary and secondary stream. The primary stream is treated with alkaline-peroxide liquor to produce a treated pulp. The secondary stream is processed using a secondary HC refining step to produce a partially refined pulp, and removing latency of the partially refined pulp and the treated pulp is removed in a common location. The treated pulp and the partially treated pulp is processed by one or more than one second low consistency refining step to produce a final pulp. The methods utilize less energy when compared with a method for producing pulp that requires both primary and secondary high consistency refining stages. | 12-15-2011 |
| 20120160433 | PROCESS FOR PRODUCING MICROFIBRILLATED CELLULOSE - A process for treating cellulosic fibres comprises mechanically pre-treating the fibres followed by treating the fibres with an enzyme and thereafter mixing the fibres with a solution comprising an alkali metal hydroxide followed by mechanically treating the fibres to form microfibrillated cellulose. In this way it is possible to produce microfibrillated cellulose (MFC) in an improved and energy efficient way. | 06-28-2012 |
| 20130292071 | METHOD FOR MANUFACTURING BLEACHED WOOD POWDER AND PAPERS - The present invention relates to paper that is produced by mixing bleached wood powder with natural wood pulp, thereby improving the dewaterability while reducing the amount of pulp used such that inexpensive and high-quality paper is provided. The wood material is subjected to a process in which it is milled and dried and is then sorted to smaller than a predetermined size and cleaned, the cleaned wood powder is bleached by being stirred for a predetermined time after having been introduced together with a bleaching agent, and the wood powder resulting from the bleaching is subjected to grinding processing and to a sorting and cleaning process, thereby producing bleached wood powder, and paper is produced by mixing from 5 to 20% by weight of the bleached wood powder with from 80 to 95% by weight of natural wood pulp and then subjecting the mixture to a paper-making process. | 11-07-2013 |
| 20150027648 | METHOD FOR PRODUCING ANION-MODIFIED CELLULOSE NANOFIBER DISPERSION - Provided is a method which comprises a process of having an anion-modified cellulose nanofiber dispersion contain monovalent or divalent metal ions. Consequently, the fluidity of an anion-modified cellulose nanofiber dispersion obtained thereby is improved. | 01-29-2015 |
| 162025000 | With additional chemical treatment before start of defibration | 3 |
| 20100263815 | Multi-stage AP mechanical pulping with refiner blow line treatment - The invention combines the step of adding chemicals such as alkaline peroxide to an intermediate line after refining, with the step of applying chemicals such as alkaline peroxide as a pre-treatment before primary refining and/or applying chemicals such as alkaline peroxide at the primary refiner. This is implemented in the preferred embodiment, by pre-treating feed material, refining the materials into a pulp in a superatmospheric refiner, and adding chemicals in the post refining blowline. | 10-21-2010 |
| 20130126109 | Silicate Free Refiner Bleaching - A method for bleaching pulp includes introducing a bleaching liquor in at least one refiner to contact lignocellulosic particulates processed therein in the formation of pulp, wherein the bleaching liquor includes at least one peroxide, magnesium sulfate, caustic hydroxide, at least one chelating agent, and less than 0.1%, or less than 0.01%, or less than 0.001% by weight silicate based on dry weight of the lignocellulosic particulates. Magnesium perhydroxide is generated in situ in the refining system with bleaching of the particulates during refining and reduced scale occurs by use of the silicate or essentially silicate free conditions. A free or essentially silicate-free bleaching liquor which can provide highly brightened pulps also is described. | 05-23-2013 |
| 20140083633 | CHEMICAL TREATMENT OF LIGNOCELLULOSIC FIBER BUNDLE MATERIAL, AND METHODS AND SYSTEMS RELATING THERETO - The present disclosure relates to a system and process in which pulp is produced using a chemical mechanical pulping process, during which lignocellulosic material undergoes fiberization without chemical impregnation. Chemical treatment of the lignocellulosic material is performed during or after fiberization of the material to become fiber bundles. | 03-27-2014 |
