According to an example aspect of the present invention, there is provided a method comprising: providing a wet pulp composition comprising cellulosic and/or lignocellulosic fibres; mixing the wet pulp composition with at least one additive chemical to obtain a mixture of wet pulp and additive chemicals; at a consistency of the mixture of less than 80%, preparing cellulosic and/or lignocellulosic particles from the mixture; drying the particles, wherein fibres in the particles are dispersible to a molten thermoplastic or thermoset matrix to obtain a dispersion of fibres in the molten matrix.
Oleophilic cellulosic and/or lignocellulosic fibres, a composition and a product comprising the same, a method of preparing the same, and uses of the same
According to an example aspect of the present invention, there are provided oleophilic cellulosic and/or lignocellulosic fibres, wherein the oleophilic cellulosic and/or lignocellulosic fibres are capable of retarding oil and/or grease migration.
D21H 21/14 - Non-fibrous material added to the pulp, characterised by its function, form or propertiesPaper impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
C08B 1/02 - Rendering cellulose suitable for esterification
D21H 11/18 - Highly hydrated, swollen or fibrillatable fibres
According to an example aspect of the present invention, there is provided a method comprising: providing a wet pulp composition comprising cellulosic and/or lignocellulosic fibres; mixing the wet pulp composition with at least one additive chemical to obtain a mixture of wet pulp and additive chemicals; at a consistency of the mixture of less than 80%, preparing cellulosic and/or lignocellulosic particles from the mixture; drying the particles, wherein fibres in the particles are dispersible to a molten thermoplastic or thermoset matrix to obtain a dispersion of fibres in the molten matrix.
OLEOPHILIC CELLULOSIC AND/OR LIGNOCELLULOSIC FIBRES, A COMPOSITION AND A PRODUCT COMPRISING THE SAME, A METHOD OF PREPARING THE SAME, AND USES OF THE SAME
According to an example aspect of the present invention, there are provided oleophilic cellulosic and/or lignocellulosic fibres, wherein the oleophilic cellulosic and/or lignocellulosic fibres are capable of retarding oil and/or grease migration.
A dispersion of cellulose fibers, a method of preparing the same and uses thereof. The dispersion is produced by providing a cellulose feedstock comprising cellulose fibers; by providing a mixture of an ionic liquid and a protic antisolvent for cellulose as a dispersion medium, the ionic liquid being selected from the group of protic salts of superbases capable of dissolving cellulose; and by mixing said cellulose feedstock into said dispersion medium so as to disperse the cellulose fibers therein to form a dispersion which is stable for at least 24 hours at room temperature. The dispersion can be used as an additive of cellulose pulps for making of fibrous products.
According to an example aspect of the present invention, there is provided a method for producing an oxidised lignin based high performance surface active agent in techno-economically feasible manner within kraft pulp mill without interfering the main process.
According to an example aspect of the present invention, there is provided a method of replacing with sodium make-up chemicals sodium losses caused by outflows in a pulp mill which employs a kraft process for producing cellulosic pulp, wherein the pulp mill includes a unit for conversion of sulphurous compounds, which is fed with sulphurous substances of the kraft process to convert said sulphurous substances into oxidized sulphurous compounds, said method comprising using sodium sulphate possibly together with other sodium salts as the main make-up chemical, to achieve an essentially sodium hydroxide free feed of sodium make-up chemicals, and at least a part of the sulphur contained in the sodium sulphate make-up chemical being used for producing oxidized sulphurous compounds in said unit for conversion of sulphurous compounds.
A dispersion of cellulose fibers, a method of preparing the same and uses thereof. The dispersion is produced by providing a cellulose feedstock comprising cellulose fibers; by providing a mixture of an ionic liquid and a protic antisolvent for cellulose as a dispersion medium, the ionic liquid being selected from the group of protic salts of superbases capable of dissolving cellulose; and by mixing said cellulose feedstock into said dispersion medium so as to disperse the cellulose fibers therein to form a dispersion which is stable for at least 24 hours at room temperature. The dispersion can be used as an additive of cellulose pulps for making of fibrous products.
According to an example aspect of the present invention, there is provided a method of replacing with sodium make-up chemicals sodium losses caused by outflows in a pulp mill which employs a kraft process for producing cellulosic pulp, wherein the pulp mill includes a unit for conversion of sulphurous compounds, which is fed with sulphurous substances of the kraft process to convert said sulphurous substances into oxidized sulphurous compounds, said method comprising using sodium sulphate possibly together with other sodium salts as the main make-up chemical, to achieve an essentially sodium hydroxide free feed of sodium make-up chemicals, and at least a part of the sulphur contained in the sodium sulphate make-up chemical being used for producing oxidized sulphurous coumpounds in said unit for conversion of sulphurous compounds.
According to an example aspect of the present invention, there is provided a method of replacing with sodium make-up chemicals sodium losses caused by outflows in a pulp mill which employs a kraft process for producing cellulosic pulp, wherein the pulp mill includes a unit for conversion of sulphurous compounds, which is fed with sulphurous substances of the kraft process to convert said sulphurous substances into oxidized sulphurous compounds, said method comprising using sodium sulphate possibly together with other sodium salts as the main make-up chemical, to achieve an essentially sodium hydroxide free feed of sodium make-up chemicals, and at least a part of the sulphur contained in the sodium sulphate make-up chemical being used for producing oxidized sulphurous coumpounds in said unit for conversion of sulphurous compounds.
According to an example aspect of the present invention, there is provided a method for producing an oxidised lignin based high performance surface active agent in techno-economically feasible manner within kraft pulp mill without interfering the main process.
The invention concerns a method for precipitating organic pollutants from aqueous liquids used in process stages for bleaching or de-lignifying pulp in a pulp mill. The method comprises the steps of adjusting the pH of an acid aqueous liquid received from a bleaching or de-lignifying process stage in a pulp mill to alkaline by adding at least one agent containing calcium, precipitating organic pollutants in a precipitation stage from the alkalated aqueous liquid, and reducing the pH of the filtrate from said precipitation stage to a value of 6 –9 by adding at least one acid agent to said filtrate.With the inventive method, organic pollutants are effectively removed and COD levels of the filtrate are significantly lowered compared with traditional processes. The processing of effluents and wastewater thus become simplified.
According to an example aspect of the present invention, there is provided a method for producing an oxidised lignin based high performance surface active agent in techno-economically feasible manner within kraft pulp mill without interfering the main process.
The invention relates to methods monitoring the chemical load of wastewater in manufacturing mills and industrial processes, such as in a pulp mill.. Such a process has a number of sub-processes, at least some of which have identifiable root causes for the chemical load they contribute with to the wastewater. The inventive method comprises the steps of: -selecting a number of root causes in said industrial process that causes a chemical load in said wastewater; -calculating the contribution of each of said root causes to the chemical load of said wastewater; -calculating an estimated combined chemical load for all sub-processes to said wastewater. The inventive concept also comprises a software product and an apparatus adapted to run such a software product for monitoring the chemical load of wastewater produced by an industrial process according to the inventive method.
C02F 103/28 - Nature of the water, waste water, sewage or sludge to be treated from the processing of plants or parts thereof from the paper or cellulose industry
D21C 9/00 - After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters
16.
METHOD OF UTILIZING LIGNIN CONTAINED IN BLACK LIQUOR
A method of utilising the lignin in black liquor, according to which method the Iignin is precipitated from the black liquor, the Iignin thus generated is carbonated to carbon and at least part of the carbon is fed into a recovery boiler, where it is burnt. When carbonating according to the present invention, it is possible to produce Iignin carbon from the black liquor either only for the needs of a lime reburning kiln or a similar recovery boiler, or for the needs of a lime reburning kiln (or a similar recovery boiler) and also to be used as a filler, for example for the rubber market.
A method of delignifying a fibre suspension which is obtained from alkaline pulping of a vegetable-based fibre raw material. In the present method, a fibre suspension, which comprises fibres that are suspended in the liquid phase, is treated. These fibres are first washed in order to reduce the percentage of the dissolved material generated by the cooking, using the counter-current principle, and by using, as a displacing washing solution, the filtrate liquids of stages which come later in the course of propagation of the fibres, after which the suspension of the washed fibres is fed to the delignification, where lignin is separated from the fibres by using an oxidising chemical. According to the present invention, the displacing washing solution is treated with an oxidising chemical. In this case, the oxygen which is dosed into the oxygen delignification can be used more efficiently to reduce, the kappa, number, in which case the condensation reactions of the lignin are prevented, and an oxygen delignification process is achieved which results in a lower kappa number level compared to the prior art.
42 - Scientific, technological and industrial services, research and design
Goods & Services
Providing access to a website on the Internet to customers
and employees for the promotion, development and realization
of ideas. Industrial analysis and research services.
A method for bleaching pulp is provided. In the method at least one tertiary amine compound is introduced into a process stage of bleaching. This process stage is a stage which comprises mixing pulp and a chlorine compound capable of bleaching.
D21H 17/00 - Non-fibrous material added to the pulp, characterised by its constitutionPaper-impregnating material characterised by its constitution
20.
A METHOD AND A SYSTEM FOR CONTROLLING A REFINER, FOR REFINING A PRODUCT CONTAINING CELLULOSE, SUCH AS PULP, AND AN INFORMATION OF A QUALITY INDEX OF THE PRODUCT
The present invention relates to a method and a system for controlling a refiner, grinder or the like for refining a product containing cellulose, such as pulp. A quality index specific to the product is provided and related to at least one predefined property of a slurry containing the cellulose product, or a finished product made of it. Control signals in response to the quality index is generated to achieve a desired value of the predetermined property, and at least one operating parameter of the refiner is set accordingly. The predefined property is either the tensile strength of said finished product or the Canadian Standard Freeness (CSF) of the slurry.
D21D 1/00 - Methods of beating or refiningBeaters of the Hollander type
G05B 13/00 - Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion
A method of modifying a polymer having hydroxyl groups, selected from the group of polysaccharides and lignin,to give a modified polymer comprising the step of contacting said polymer with at least one organic phosphonate salt in order to chemically modify the polymer, said organic phosphonate salt being in a liquid phase. The method of polymer modification provides novel polymers. Modified polymers obtained from a polymer having been treated with at least one organic phosphonate salt are also disclosed. The modified polymers can be used as such or separated and optionally recovered from the solution, optionally being formed into particular materials or shapes.
A method of producing regenerated cellulose and hemicellulose from a fibre pulp which is prepared by using chemical cooking. Hemicellulose and, correspondingly, cellulose is separated from the pulp, in order to form separate fractions, by dissolving them in such a solvent or an aqueous solution of it, from which they are precipitated by adding water, after which the regenerated hemicellulose and cellulose can be recovered. Hemicellulose- containing pulp, which for example is used as raw material of paper, can be efficiently fractionated into polymeric hemicellulose-rich fractions and very pure cellulose fractions, such as regenerated cellulose fibre, various cellulose particles or cellulose films.
Method for opening in a continuous operation fibres containing cellulose. In the method, fiberized raw material with a lignocellulose content is used as the source material, which is in the form of a fibre suspension containing a fibre network. The fibre suspension is transferred in a continuous operation to a pressurized chamber (2, 3, 4, 5), in which the fibre network is dispersed into individual fibres or possibly fibre bunches, by mixing the fibre suspension with a carrier gas. The mixture of carrier gas and fibres or fibre bunches is brought through a rapid pressure drop to a lower pressure, in order to open the fibres. The wall of the fibres to be opened is in a swollen state, the force produced from the effect of the pressure drop on the expanding component in the lumen of the fibres against the fibre wall opens the fibres in an axial direction. The opening of the fibres of the stock promotes the processability of the stock and has an advantageous effect on the properties of the fibres.
A solution containing lignocellulose material solvated in an ionic liquid that comprises anions and cations. The cation is selected from substituted phosphonium ions having Formula (II), +P[R1 R2 R3 R4], wherein +P stands for a phosphonium ion and each R1, R2, R3, and R4 is independently selected from optionally substituted, linear or branched hydrocarbyl radicals which form a hydrophobic residue. The anions are derived from a Bronsted acid or mixture thereof. The present ionic liquids are capable of phase separation on mixing with water, which allows for separation of the cellulose from the solution and for recovery and recycling of the ionic liquid.
A method and a system for collecting, calculating and providing quality information of a product as well as a recordable and remotely readable medium attached to a bulk product. The method comprises measuring process parameters vital to the quality of said product in said process steps; and calculating an index indicative of the quality of the product. The parameters are normalized to form a contribution of the process step to an overall yield function of the production process, and the contribution of each process step to said yield function is combined incrementally to essentially contribute to said quality index of said product. The medium is for example a passive RFID tag.
A method of separating hemicellulose and cellulose by dissolution of hemicellulose from a hemicellulose-rich source, such as a pulp of any origin or from holocellulose. In the method, hemicellulose is dissolved in a solvent system comprising a cellulose solvent, which is either a ionic liquid or another direct cellulose solvent, and a molecular solvent (co-solvent), wherein said co-solvent does not dissolve cellulose, and wherein the solvent basicity and acidity of said ionic liquid or other direct cellulose solvent are adequately adjusted by the co-solvent. The present invention enables quantitative separation of cellulose and hemicellulose without any depolymerization and yield losses as occurring during conventional dissolving pulp manufacturing processes.
A method for bleaching pulp is provided. In the method at least one tertiary amine compound is introduced into a process stage of bleaching. This process stage is a stage which comprises mixing pulp and a chlorine compound capable of bleaching.
A method for bleaching pulp is provided. In the method at least one tertiary amine compound is introduced into a process stage of bleaching. This process stage is a stage which comprises mixing pulp and a chlorine compound capable of bleaching.
The present invention concerns a method of producing dissolving pulp, wherein bleached paper pulp produced by kraft pulping is used as a raw-material pulp, the method being carried out by cold alkali treatment by mixing the raw-material pulp with a concentrated alkali solution such that the mixture of the pulp and the alkali solution contains 50 - 220 g/1 alkali and the solution is allowed to be absorbed into the pulp at a temperature of 20 - 50 °C. The alkali is allowed to act on the pulp in order to dissolve hemi celluloses into it and the hemicelluloses-containing alkali solution is separated from the pulp, i.e. from the dissolving cellulose pulp. Finally, the separated alkali solution is concentrated and recycled to the feed of the cold alkali stage.
