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WO/2008/141463A1 |
A method for increasing the quality of cellulosic fibres used in forming dissolving pulp wherein the hemicellulose content of a pulp is reduced by treating the fibres with a liquor which includes hydrogen peroxide and ammonia.
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WO/2008/144383A1 |
A method to detect organic contaminants in pulp and fiber is described which uses hydrophobic dyes, such as fluorescent dyes.
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WO/2008/141121A1 |
A method of monitoring and inhibiting scale precipitation and deposition from spent liquor in pulp mill evaporators and concentrators is disclosed. The method includes connecting a black liquor deposition monitor to a pulp mill evaporato...
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WO/2008/138428A1 |
The invention relates to the production of a chemical solution comprising less than 25 % sulphite (calculated as Na2SO3) in relation to the oven-dry quantity of the lignocellulose raw material, said method having the following steps: mix...
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WO/2008/140396A1 |
An apparatus and a method for washing pulp in an washing apparatus comprising a rotatable drum (102, 602) provided with a number of outer compartments (104, 604, 606) for the pulp (418, 622, 624), which are defined by compartment walls, ...
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WO/2008/135631A1 |
The present invention relates to a method for preparing dithionite solution with a reaction wherein sodium bisulfite is reduced with sodium borohydride solution to obtain dithionite, wherein the rise of the pH of the solution is prevente...
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WO/2008/132228A1 |
The invention relates to a method for reducing the energy consumption at the refining of a pulp suspension in a papermaking process. The reducing of the e nergy consumption is provided by treating said pulp suspension with non-stoichiome...
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WO/2008/129048A1 |
The present invention relates to a method for the production of bleached wood particles, and to a method for the production of wood materials ranging from light-toned to white, which are produced from the bleached wood particles.
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WO/2008/122929A1 |
The present invention relates to a material for acquisition of liquids comprising individualized, crosslinked cellulosic fibers having an effective amount of a polymeric acid crosslinking agent (such as polyacrylic acid polymers) reacted...
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WO/2008/116319A1 |
The present invention relates to a process for producing ferulic acid, which comprises isolating ferulic acid from a culture media in which encapsulated live feruloyl esterase producing cells are cultivated, wherein the cells are encapsu...
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WO/2008/113839A1 |
The present invention relates to a process for the control of pitch in an aqueous medium by adding surface-reacted natural calcium carbonate or an aqueous suspension comprising surface-reacted calcium carbonate and having a pH greater th...
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WO/2008/111613A1 |
Disclosed are: a novel endoglucanase PPCE which is derived from Penicillium pinophilum; a cellulase preparation containing the endoglucanase PPCE; and a method for the treatment of a cellulose-containing fiber utilizing the endoglucanase...
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WO/2008/107044A1 |
Method for processing a particulate cellulose/plastic waste mixture comprising cellulosic and thermoplastic materials, the method comprising the steps: (a) drying the cellulose/plastic waste mixture by treatment with a hot gaseous medium...
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WO/2008/106811A1 |
The invention describes a method for the direct production of molecules with a minimum molecular weight of 78 g/mol by means of the breakdown of lignin, lignin derivatives, lignin fragments, and/or lignin-containing substances or mixture...
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WO/2008/106083A2 |
A system for the bleaching of lignocellulosic pulp including: a first oxygen reactor and a second oxygen reactor connected in series to the first oxygen reactor, wherein each reactor bleaches the pulp; an upstream pulp washer that washes...
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WO/2008/104651A1 |
The invention relates to a method for functionalising carbohydrates, that comprises at least one step during which the carbohydrates react with an oxidising agent in the presence of a copper-phenanthroline complex. The invention more par...
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WO/2008/101952A1 |
Process for the bleaching of paper pulp Process for the bleaching of paper pulp in which : (a) an aqueous suspension of the paper pulp is first subjected to a chelating treatment with at leas t one aminopolycarboxylic acid, its salt or t...
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WO/2008/099064A1 |
A method of modifying the pulp which is used for manufacturing paper or cardboard. According to the method, the pulp is crosslinked chemically, after which it is used to produce paper or cardboard. According to the present invention, the...
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WO/2008/098921A1 |
The invention relates to the use of storage-stable surfactant solutions in bleaching methods with hydrogen peroxide, using manganese complexes, in particular with triazacyclononanones.
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WO/2008/098601A2 |
The invention relates to lignin-preserving bleaching of lignocellulosic primary fibres produced by the action of sulfites, by means of formamidine sulfinic acid (FAS). The invention also relates to a bleached primary fibrous material con...
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WO/2008/092988A1 |
The invention relates to a stabilizing composition comprising following components (A) a polymer having following formula (I) wherein R1 is a hydrogen atom or an alkyl group containing 1 to 12 carbon atoms, R2 is -COOM or -CH2COOM, M is ...
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WO2008076268A9 |
This invention relates to an improved bleaching process for bleaching pulp comprising at least one bleaching stage which comprises treating a hardwood pulp with a bleaching agent comprising CIO2 in the presence of a weak base such as, fo...
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WO/2008/086937A2 |
The present invention concerns the treatment of a cellulose materialin the presence of a transition metal catalyst, hydrogen peroxide whilst maintaining the pH of the treatment mixture.
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WO/2008/088279A1 |
A pulp washing arrangement (10) comprises a rotatable drum (2) and an enclosing stationary casing (1 1). The drum has a plurality of compartments (4), at least partially defined by a perforated surface (7), for pulp to be washed arranged...
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WO/2008/081078A1 |
The present invention relates to a method for manufacturing mechanical pulp, the method comprising -introducing raw material of the mechanical pulp, -refining the raw material in a first refining stage in order to form the mechanical pul...
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WO/2008/077450A1 |
The invention relates to a method for the production of a tissue web (1) produced from a material suspension comprising fibers. To this end, the volume and the tear length is to be improved, with minimized freeness degree, such that the ...
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WO/2008/076738A2 |
The invention relates to a process of detoxifying pre-treated lignocellulose-containing material by subjecting pre-treated material to a detoxifying compound capable of binding 1) pre-treated lignocellulose degradation products and/or 2)...
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WO/2008/076055A1 |
The present invention relates to a process of producing pulp comprising digesting lignocellulose-containing cellulosic fibers in a digestion liquid, wherein the fibers are treated in the presence of at least one chelating agent capable o...
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WO/2008/076267A2 |
This invention relates to an improved bleaching process for bleaching pulp comprising at least one bleaching stage which comprises treating a softwood pulp with a bleaching agent comprising CIO2 in the presence of a weak base such as, fo...
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WO/2008/074220A1 |
A preparation method of a bamboo pulp comprises the steps of preparing material, cooking and bleaching. In the step of preparing material, bamboo material is obliquely cut at the angle of 10-85ºinto bamboo chip with a chip cross-section...
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WO/2008/076747A2 |
The invention relates to a process of fermenting plant material into a fermentation product using a fermenting organism, wherein one or more phytohormones are present during fermentation.
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WO/2008/071718A1 |
Method for treating a prebleached chemical pulp comprising a step of ozone treatment of the said pulp, carried out at a temperature above 60°C, advantageously above 65°C and even more advantageously above or equal to 70°C.
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WO/2008/069728A1 |
The invention relates to a drying box for drying a cellulose pulp web. The box has a plurality of fans (3, 5), each fan being driven by a motor (9, 11) and contributing to generate a positive pressure in the drying box interior (7). The ...
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WO/2008/067916A1 |
The method treats the filtrate (F3, F6) produced in the course of the thickening (3, 6) of a paper fibre suspension (S, S). The purpose of this thickening (3, 6) is in particular to acquire the necessary consistency in a downstream pulp ...
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WO/2008/066475A1 |
The invention relates to a washing arrangement (100) for washing and dewatering of cellulose pulp, comprising a rotatable drum (10) having a plurality of outer compartments (12) on the drum for the pulp to be washed, which compartments a...
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WO/2008/063122A1 |
A press roll for washing and/or dewatering pulp, comprising an axial core (102) and a mantle section provided around the axial core, to which mantle section at least one perforated roll plate (108) is attached. The roll plate (108) has t...
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WO/2008/059006A1 |
The present invention relates to a process for reducing scaling by calcium carbonate precipitation on equipment in the pulp and paper industry. The process is especially advantageous in the production of paper and board. The process rela...
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WO/2008/060519A2 |
An improved bleaching process for bleaching pulp having at least one Eop stage or Ep stage which comprises subjecting the pulp to a Q stage in which the pulp is treated with a chelating agent at a pH of from greater than 2.5 to less than...
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WO/2008/057492A2 |
Methods for inhibiting the depositions of organic contaminants from pulp in pulp and papermaking systems are disclosed. A combination of an enzyme and a nonionic polymeric detackifier are added to the pulp or applied to deposition-prone ...
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WO/2008/055327A1 |
The present invention relates to an improved process for processing chemical cellulose pulp wherein carboxymethylcellulose (CMC) is added during the bleaching step of said pulp. The addition of CMC in this step of the bleaching process p...
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WO/2008/051157A1 |
The invention relates to a washing arrangement (100) comprising two co-operating cylindrical press rolls (102), at least one having a perforated outer surface (104). There is a guide surface (106) at a distance from the perforated outer ...
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WO/2008/044988A1 |
The present invention relates to a process of bleaching pulp derived from an alkaline pulping process having a hexenuronic acid content prior to the final bleaching stage from about 1 to about 80 mmol/kg dry pulp, said process comprising...
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WO2007143182A9 |
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 bleachin...
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WO/2008/045770A2 |
A method of making absorbent cellulosic sheet with increased wet/dry CD tensile ratio includes treating the fiber at high consistency with debonder in a pulper, for example. The process enables the use of large amounts of debonder in a w...
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WO/2008/039672A2 |
Methods are provided for determining the surface fatty acid content in a wood pulp or Whitewater sample. The methods comprise reacting free fatty acids which are present on the surface of the wood pulp fibers in the sample or in the Whit...
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WO/2008/036031A1 |
The present invention relates to a method of treating an aqueous suspension of bleached pulp derived from an alkaline pulping process comprising dewatering and drying said suspension, wherein the pH of the suspension to be treated ranges...
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WO/2008/033529A1 |
Methods to control lipophilic extractives in Acacia pulp and fibers are described. One method involves contacting the pulp or fibers with a composition containing at least one enzyme, such as at least one esterase or lipase or both, for ...
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WO/2008/028960A1 |
The invention relates to a process for the deresination of pulp as well as to the use of carbon dioxide or a (bi)carbonate compound for the deresination of pulp. The process concerns the removal of wood extractives or resin from an aqueo...
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WO/2008/019507A1 |
There is provided a fiberboard, such as a MDF fiberboard or a HDF fiberboard, comprising wood fibers, a binder, and a sludge such as a pulp and a paper sludge. The sludge can be, for example, chosen from a primary pulp and paper sludge, ...
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WO/2008/012588A2 |
A mouldable paper pulp composition comprising an aqueous suspension of a base material comprising paper particles and a detergent resistant binding agent for the paper particles, in an intimate and substantially homogenous mix. Also prov...
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