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WO/2012/137076A1 |
A method and system for pulp manufacturing used in connection with a kraft process includes a vertical pressure vessel operated in batch mode, a single-vessel or multi-vessel continuous digester, and other equipment for further processin...
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WO/2012/135001A2 |
Formulations and methods for papermaking are disclosed herein using one or more volatile debonders, where the volatile debonder forms a solution or an emulsion with water in a paper precursor, and where the volatile debonder is evaporabl...
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WO/2012/131665A1 |
A method of transforming a lignocellulose material comprises the steps of: a. combining a lignocellulose material with a solution containing hydrogen peroxide and a hydrogen peroxide stabiliser to produce a mixture that is at least 3% by...
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WO/2012/134358A1 |
The invention relates to a method and arrangement for adding treatment liquid to comminuted cellulose material, preferably wood chips, during the manufacture of chemical pulp in a continuous process. Said process using a down flow vessel...
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WO/2012/130957A1 |
The invention relates to a method for producing a cellulose-containing mass for forming a cellulose-containing composite material comprising following steps: (a) providing an input material comprising at least one cellulose-containing ra...
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WO/2012/128901A1 |
A prehydrolysis of wood chips or other lignocellulosic material in a vessel having a gaseous portion and a liquid portion. The vessel includes at least one stress relieving piece that inhibits overcompression of the lignocellulosic mater...
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WO/2012/110231A1 |
A method for processing lignocellulose comprises the step of contacting a lignocellulosic substrate with a biphasic liquid system in a reaction vessel, the biphasic liquid system comprising a first, aqueous phase and a second, organic ph...
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WO/2012/102650A1 |
The invention relates to a continuous digester for producing pulp from comminuted cellulosic material. The digester has a cone diverter on a bottom scraper arranged in the bottom of the digester for assisting in out feed of pulp produced...
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WO/2012/088451A2 |
A pump control system and a torque control valve are disclosed. In one embodiment, the torque control valve includes a sleeve, a spool disposed in the sleeve, and a piston rod disposed through the spool. The spool has a first recess area...
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WO/2012/087228A1 |
The invention discloses a method of controlling a pulping process wherein wood chips are conveyed to an impregnation vessel and/or to a digester where said wood chips are treated with a liquor comprising chemicals. According to the metho...
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WO/2012/085476A1 |
The invention relates to a process for the delignification and bleaching of paper pulp, comprising at least one step of bringing the paper pulp into contact with hydrogen peroxide and a molybdenum-based complex of formula (I): in which R...
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WO/2012/074923A2 |
The invention pertains to, for example, an improved sorbent and process for removing fermentation inhibitors such as furfural and/or HMF in microbial processes utilizing fermentable sugars obtained from biomass including, for example, in...
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WO/2012/071312A2 |
Biomass pretreatment using anhydrous ammonia is effective in a static reactor vessel when the ammonia can penetrate through the biomass particles or pieces in vapor state, and when biomass is continuously fed and moved through the reacto...
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WO/2012/071308A2 |
Biomass pretreatment using anhydrous ammonia was found to be effective in a static vessel when the ammonia can penetrate through the biomass particles or pieces in vapor state. To achieve this condition, total system moisture content is ...
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WO/2012/059133A1 |
The method is used to recover chemicals, e.g., from wastewater (1) produced in the production of pulp. The wastewater (1) is conducted between ion-selective walls (3, 3'), and at the same time electric current flows through the wastewate...
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WO/2012/019305A1 |
The present invention relates to a process for the conversion of a lignocellulosic feedstock involving acid pretreatment. The process comprises the steps of treating the lignocellulosic feedstock with alkali at a pH of between about 8.0 ...
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WO/2012/010749A2 |
The present invention relates to a method for converting lignocellulosic biomass into sugars, comprising at least three steps. The first step is a step of cooking the lignocellulosic biomass in the presence of at least one hydrated inorg...
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WO/2012/010750A2 |
The present invention relates to a method for converting lignocellulosic biomass into sugars, comprising at least three steps. The first step is a step of cooking the lignocellulosic biomass in the presence of at least one hydrated inorg...
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WO/2012/000093A1 |
The present disclosure provides an organosolv biorefining process. The present process comprises treating a lignocellulosic biomass in the presence of a solvent and under certain conditions to separate at least a part of the lignin from ...
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WO/2011/156708A1 |
A method to make pulp adapted for forming a corrugated medium, the method includes: cooking chips in a cooking vessel using a caustic carbonated pulping soda/caustic (SC) cooking liquor injected into the cooking vessel; fiberizing the ch...
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WO/2011/154967A1 |
A process of fractionation of biomass using aqueous ammonia for fractionation of biomass into lignin, cellulose and/or hemicellulose is provided herein. The process disclosed in the present invention is recovers lignin, cellulose and hem...
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WO/2011/150436A1 |
The present invention relates to a process for obtaining high-value products from lignocellulosic material, especially wood, comprising the steps of a) preliminary hydrolysis of the lignocellulosic material, b) removal of at least a port...
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WO/2011/138634A1 |
A method for pulp processing used in connection with a pre-hydrolysis kraft process (PHKP) includes adding wood chips or similar material to a reaction vessel, performing pre-hydrolysis, and neutralizing the mixture with a first quantity...
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WO/2011/138633A1 |
A method for pulp processing includes a cold caustic extraction stage in which the spent cold caustic solution and the spent liquid used to wash the extracted pulp are concentrated by an evaporation system. The concentrated liquid can be...
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WO/2011/138356A1 |
The present invention relates to a process for preparing synthesis gas and at least one organic, liquid or liquefiable value product, by a) providing a biomass starting material, b) subjecting the biomass starting material to digestion, ...
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WO/2011/134746A1 |
Novel compositions containing (A) organopolysiloxanes having a viscosity of 10 - 350 mm2/s at 25°C and 1013 hPa, (B) organopolysiloxanes having a viscosity of 500 - 200 000 mm2/s at 25°C and 1013 hPa, (C) precipitated silicas having a ...
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WO/2011/127999A1 |
The invention relates to a process for producing fibrous material and to a fibrous material from wood having a lignin content of at least 15% for softwood and of at least 12% for hardwood, based in each case on the oven-dry fibre mass, w...
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WO/2011/128481A2 |
The invention relates to a method for exploiting stubble, comprising a previous phase of conditioning the stubble, involving the operations of harvesting and parching by separating the straw and the seed plants; obtaining two fractions r...
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WO/2011/126613A2 |
In accordance with certain embodiments of the present disclosure, a method of decreasing the amount of oxidizer required by a pulping or papermaking process is provided. The method comprises adding to a process stream or solution of the ...
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WO/2011/113329A1 |
A circular utilization method of straw in a pulping and papermaking processes comprises the following steps of: obtaining straw raw material for pulping and its waste through stock preparation; obtaining primary pulp by digesting the str...
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WO/2011/114004A1 |
The invention relates to a process for fibrillating lignocellulosic material wherein the process comprises treating lignocellulosic material with ionic liquid and recovering basically intact fibres of said lignocellulosic material. Anoth...
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WO/2011/113119A1 |
The present invention relates to an improved process for producing chemical cellulose pulp wherein biopolymers are added immediately before, during or after a bleaching step, depending on pulp characteristics and on process conditions us...
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WO/2011/113126A2 |
The present invention relates to an improved process for producing chemical cellulose pulp wherein biopolymers are added immediately before, during or after a bleaching step, depending on pulp characteristics and on process conditions us...
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WO/2011/112703A2 |
The invention provides a method of improving the digestion of wood chips into pulp. The method involves: adding a liphohydrophilic glycerol-based polymer additive to a solution used in the digestion process. This additive is unexpectedly...
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WO/2011/104196A2 |
The invention relates to a method for deaerating liquids which contain at least 50% by weight, in particular 70% by weight, of water by adding to these liquids 0.00001 to 1.0% by weight of polyoxyalkylenes of the formula R-[O-CH2-CH(CH3)...
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WO/2011/102760A1 |
The present invention relates to a method and system for cooking of chemical pulp, and relates in particular to a process for dealing with rejects in conjunction with the cooking of chemical pulp. According to the invention is a chopper ...
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WO/2011/096857A1 |
The present invention concerns an improvement of the heating circulation in a continuous digester for the production of cellulose pulp. The heating circulation withdraws treatment liquor from the vessel via a strainer section 61 arranged...
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WO/2011/091044A1 |
Methods are disclosed for the continuous treatment of biomass comprising a pretreatment step, wherein said biomass is contacted with a first supercritical, near-critical, or sub-critical fluid to form a solid matrix and a first liquid fr...
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WO/2011/085038A1 |
A process for producing a water-absorbent high-porosity fibrous matrix from lignocellulosic raw materials, comprising wet mechanical processing of the raw material, drying, and then dry mechanical processing the fibers to provide a fibro...
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WO/2011/080399A1 |
A tall-oil pitch product, which is saponified with an alkali, which product comprises a stable emulsion or a micelle-water mixture, and a method of producing it, and its uses. In the present method, in order to saponify and to hydrolyse ...
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WO/2011/078775A1 |
The invention concerns a method and an arrangement for the improvement of a wash after completed digestion in a continuous digester (1) for the production of cellulose pulp. According to the invention, the softened chips are exposed to a...
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WO/2011/072718A1 |
The present invention relates to a process for forming a pulp mixture, the process comprising the steps of: a) providing a wood material and a first liquor, b) treating the wood material in the first liquor in order to release wood fibre...
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WO/2011/073253A1 |
The present invention provides a method for producing furfural from lignocellulosic biomass material, comprising the steps of: (a) contacting the lignocellulosic biomass material with a mixture comprising water and an organic acid at a t...
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WO/2011/066189A1 |
A method to cook thin chips in a continuous digester vessel including: introducing thin chips having a thickness of no more than 6mm, into a chip bin; adding white (cooking) liquor to the chip bin or to a chip transport passage extending...
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WO/2011/053203A1 |
The invention relates to a method and arrangement for steaming and impregnating wood chips in a single down flow vessel. A first upper volume of chips is established above a liquid level (LIQ_LEV) in the vessel, wherein steaming takes pl...
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WO/2011/007369A1 |
This specification describes a process to separate lignin from an aqueous mixture derived from a biomass feedstock, wherein the separation is done at or above critical temperature, usually above 60°C.
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WO/2011/004855A1 |
Provided is a technique for improving the causticizing process in pulp production. A high-quality calcium carbonate can be produced efficiently by adding fired shells and a green liquor and by inducing a causticizing reaction during the ...
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WO/2010/147812A1 |
A processes producing mechanical pulps utilizing refiners for improving the quality of screen rejects, and most particularly to a mechanical pulp mill integrated with a neutral-alkaline papermaking process producing mechanical printing p...
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WO/2010/147118A1 |
An apparatus and process for pulp production are provided with which a pulp can be produced in an environment having the atmospheric pressure and having a temperature lower than in the kraft process and the sulfite process. The apparatus...
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WO/2010/142146A1 |
A process for producing high-strength corrugated base paper comprises the following five steps: (1) preparing a pulp;(2) kneading the pulp, in which the pulp concentration is ≥30%, the motor current of the kneader is controlled in the ...
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