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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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WO/2008/013875A2 |
Methods for inhibiting the depositions of organic contaminants from pulp in pulp and papermaking systems are disclosed. Hydrophobically modified poly[ethylene glycol] are added to the pulp or applied to deposition-prone surfaces of a pap...
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WO/2008/011523A2 |
Oxidative compositions and processes that preserve and enhance the brightness and improve color of pulp or paper when applied during different stages of the papermaking process are identified. The oxidative composition and method maintai...
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WO/2008/006946A1 |
The invention relates to a process for the treatment of a filtrate with oxygen and to the use of oxygen for reducing harmful components in a filtrate. The filtrate is produced in the early stages of a mechanical pulping process in a dewa...
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WO/2008/002764A2 |
A inert sampling needle is provided for piercing a septum of a vial containing a sample. The sampling needle includes a hollow rigid support member having an inner wall, an outer wall, and a septum-piercing end. The sampling needle also ...
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WO/2007/147428A1 |
The present invention relates to a novel group of copolymers comprising a soluble carbohydrate polymer (SCP), which typically is a non-starch carbohydrate, and a macromolecule covalently attached to the SCP. The macromolecule may e.g. be...
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WO/2007/144824A2 |
This invention relates to pulp reactivity enhancement. In particular, the invention relates to a method of producing an alkali cellulose which includes steps of providing a pulp and subjecting the pulp to an alkaline treatment to produce...
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WO/2007/143877A1 |
A method of preparing bleached pulp with high yield by free radical cleanness kraft process, which includes providing electrons to the reactive medium in the electrochemical vessel by electrodes as the pH is subacidity. And put oxygen an...
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WO/2007/143840A1 |
There are provided apparatuses for increasing dryness of a substance. The apparatuses comprise at least one module, each of the module(s) comprising at least two electrodes adapted to submit the substance to an electric current. The elec...
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WO/2007/140837A2 |
The invention relates to a method for producing fibrous material with a lignin content of at least 15% for softwood, at least 12% for hardwood, or at least 10% for annual plants, relative to the oven-dry fiber mass in each case, consisti...
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WO/2007/140839A2 |
The invention relates to a method for producing fibrous material consisting of the following steps: production of a chemical solution with less than 25% sulfite (calculated as NaSO3), relative to the oven-dry quantity of the lignocellulo...
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WO/2007/143184A2 |
The present invention relates to a method of increasing the brightness of pulp, pulp made from such methods and methods of using such pulp.
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WO/2007/140838A2 |
The invention relates to a lignocellulosic fibrous material made of wood with a breaking length of more than 8 km at 15 °SR and a lignin content of at least 15%, relative to the unbleached oven-dry fibrous material, for softwood, and wi...
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WO/2007/134974A1 |
The invention relates to a method for improving the quality of a pulp slurry (39) that is produced in a stock preparation process and is to be used for producing planar structures from fibrous materials. In order to improve the quality o...
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WO/2007/132836A1 |
It is intended to provide a process for producing bleached pulp in which unbleached pulp obtained by cooking a lignocellulose material is subjected to alkali/oxygen bleaching, treated with peroxomonosulfuric acid, and further a multi-sta...
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WO/2007/128026A1 |
The invention relates to a method for producing a chemical conversion pulp from a cellulose starting material by kraft pulping, comprising the step of cooking the starting material with a cooking liquor. The method according to the inven...
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WO/2007/128077A1 |
This specification discloses an improved paper dyeing process in which paper pulp stock is prepared and subjected to a hot dispersion process, adding a sulphur dye after the hot dispersion process, and acidifying the dyed pulp stock to f...
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WO/2007/115391A1 |
A modified Family (11) xylanase enzyme comprising cysteine residues at positions (99) and (118) to form an intramolecular disulfide bond is provided. The modified xylanase is produced by substitution of an amino acid at position (99, 118...
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WO/2007/117202A1 |
A method and a device for feeding cellulose-containing pulp from a dewatehng unit (101 ) for dewatering pulp, the dewatered pulp from the dewatering unit being discharged via an outlet (202, 402) included in the dewatering unit (101 ) to...
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WO/2007/113380A1 |
A process for the bleaching of chemical pulp, comprising a first chlorine dioxide treatment (D) of the initial bleaching and chelation (Q) to be carried out in connection therewith, forming together a DQ treatment. The process is charact...
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WO/2007/113381A1 |
A process for the bleaching of chemical pulp, wherein the initial bleaching of the pulp comprises a first chlorine dioxide treatment (D0) and a following alkaline treatment with oxygen and hydrogen peroxide (EOP), which stages are separa...
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WO/2007/108760A1 |
An improved method for the bleaching of cellulose pulp is provided in which ozone is used in the final bleaching (30) to increase the brightness of a pulp that is prebleached, preferably to kappa number < 5. It is preferred to prebleach ...
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WO/2007/107055A1 |
A kind of degradable Sanitary napkin or liner, including a toplayer, a backlayer and an absorbent layer positioned between the toplayer and the backlayer, wherein the backlayer assumes the two-layer construction formed of paper waterproo...
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WO/2007/104128A1 |
Final chlorine dioxide bleaching of lignocellulosic materials is most effective at a near-neutral pH but present industrial practice typically targets a final pH of between 3.5 and 4.0 because of the difficulty in achieving and maintaini...
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WO2007073310A9 |
The present invention relates to a washing apparatus for washing of cellulose pulp, comprising a rotatable drum (2) , provided with a number of outer compartments (4) for the paper pulp to be washed, and a stationary casing (18) that sur...
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WO/2007/095575A1 |
The present invention relates to compositions and methods for treating pitch problems in chemical pulp by treating chemical pulp process water with a combination of a lipase and a peroxide source. The present invention also relates to co...
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WO/2007/090932A2 |
A method and an apparatus for determining the total peroxide content of a cellulose pulp suspension in the pulp suspension bleaching stage, wherein the bleaching chemical is peroxide. A sample is taken from the pulp suspension, which sam...
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WO/2007/091942A1 |
The present invention provides a method for treatment of chemical pulp for the manufacturing of microfibrillated cellulose comprising the following steps: a) providing a hemicellulose containing pulp, b) refining said pulp in at least on...
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WO/2007/090461A1 |
The present invention relates to the use, as oxidation catalysts, of metal complex compounds having tetradentate ligands of formula (2) wherein all subsitutents have the meanings as defined in Claim 1. The present invention relates also ...
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WO/2007/090925A1 |
An improved method for treating lignocellulosic material, including a prehydrolysis-mass transfer process, which produces a concentrated hydrolysate volume following steam hydrolysis. The improved process comprises the heating of the dig...
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WO/2007/085579A1 |
The invention is related to a process for the bleaching of mechanical paper pulp with one or more peroxide oxidizing agents, in which the pulp is pretreated in a pretreatment step with one or more chelating agents chosen from aspartic ac...
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WO/2007/078247A1 |
The invention concerns a process for the production of peracetic acid (CH3COOOH) for use in association with the bleaching or delignification of cellulose pulp and a method for the bleaching or delignification of cellulose pulp in which ...
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WO/2007/073342A1 |
The invention refers to a process for manufacturing paper or paperboard from a pulp containing fibres, and where the process includes a stage for eliminating or reducing micro-organisms such as bacteria and/or spores, and where said firs...
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WO/2007/071187A1 |
A method for making paper pulp from straw, which utilizes the acute reaction of hydrogen peroxide and alkali substance and the heat energy released from it to make paper pulp. The method comprises the following steps: crushing wheat, ric...
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WO/2007/070527A2 |
A process of treating a cellulose-lignin pulp. In an ozone stage, the pulp is contacted with ozone to bleach and delignify the pulp. The ozone stage is conducted without the addition of a peroxide bleaching agent. A chelant is introduced...
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WO/2007/065969A1 |
A method of producing paper or cardboard using a bleached cellulosic pulp, which contains hemicelluloses. According to invention a significant portion, at least 5 wt-%, preferably about 8 to 30 wt-%, of the hemicelluloses are removed fro...
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WO/2007/065241A1 |
A continuous and batch system to produce cellulose, native lignin and unicellular protein from any form of vegetation in a closed process. The biomass is mixed in the impregnate solution of nitric acid and/or ammonium hydroxide and water...
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WO/2007/064606A1 |
The present invention is directed to methods for reducing wax content of pulp furnish by treatment with a wax agglomeration agent followed by removal of wax particles.
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WO/2007/054610A1 |
The invention relates to a new pulp, which is derived from lignocellulosic material subjected for agitation in aqueous tetra-alkylammonium salt solution under microwave irradiation. The invention relates also to a process for pulping lig...
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WO/2007/051907A1 |
The invention relates to a method and an apparatus for removing extractives from a fiber-containing suspension. From the fiber-containing suspension a fines-containing suspension containing fine particles is separated and additive is add...
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WO/2007/042192A2 |
The present invention concerns bleaching of substrates with an aqueous solution of a water soluble salt of a preformed transition metal catalyst together with hydrogen peroxide.
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WO/2007/039867A1 |
Differentially densified fibrous structures, methods for making same, and processes for treating fibers used in the fibrous structures are provided. More particularly, fibrous structures comprising two or more regions, at least one of wh...
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WO/2007/037752A1 |
The invention concerns an arrangement to counteract problems associated with mixing in steam into a pipe that is transferring a flow of pulp of medium consistency. The arrangement comprises a chamber (101) with a cross-sectional area (A3...
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WO/2007/035525A2 |
A substrate 101 of a core of non-woven synthetic materials encapsulated by regular paper 103. The substrate 101 is a porous non- woven material impregnated with paper pulp fibers 102. The encapsulation occurs during a wet paper pulp stag...
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WO/2007/025417A1 |
A pulp clean bleaching process includes: (1) single-stage two-column delignining; (2) hypochlorite bleaching; (3) activator pretreatment; and (4)hydrogen peroxide bleaching. The invention has acheived high efficent bleaching by using unp...
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WO/2007/025580A1 |
The invention relates to the use of ashes or ash derivatives in order to alkalise and buffer communal, industrial and household systems. Economical alternatives in relation to the commonly used alkalisation agents, which have the same or...
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WO/2007/016769A1 |
A method for the synergistic bleaching of lignocellulosic materials is described. The method involves the treatment of lignocellulosic materials, in particular, (a) wood pulps such as stone groundwood (SGW) pulp and thermomechanical pulp...
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WO/2007/006368A2 |
Disclosed is a method for loading a pulp suspension (S) with calcium carbonate. According to said method, liquid calcium hydroxide is added as lime milk (7) during or before the dissolving process (1) carried out to form the pulp, for ex...
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WO/2007/005165A2 |
A system and method of manufacturing a shaped cellulose sheet product. A gel-type cellulose lump is cut and dehydrated. It is then shaped for use as a face pack or burn treatment.
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