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8980050 Methods for removing hemicellulose  
A method for treating a cellulosic material comprising extracting the cellulosic material with an extractant to selectively extract hemicellulose therein and separating the extracted hemicellulose...
8974633 System and method for the pumped feed of chips to a continuous digester  
The system and method is for the pumping of finely divided cellulose material to a continuous digester. The system has a concentric arrangement of pipes. A fluid (Liq) is added to a chamber formed...
8888954 Feeding system having pumps in parallel for a continuous digester  
The feed system is for a continuous digester where at least two pumps are arranged in parallel at the bottom of a pre-treatment vessel and a stirrer is provided in direct connection to inlets to...
8801898 Method and arrangement for adding treatment liquors to cellulose raw material in a continuous process using down flow vessels  
The method and arrangement is for adding treatment liquor to comminuted cellulose material, preferably wood chips, during the manufacture of chemical pulp in a continuous process. The process uses...
8747612 Process for the production of microfibrillated cellulose in an extruder and microfibrillated cellulose produced according to the process  
The present invention relates to a process for the production of microfibrillated cellulose wherein the process comprises the steps of, providing a slurry comprising fibers, adding the slurry to...
8668806 Product and processes from an integrated forest biorefinery  
An omnibus process of pulping and bleaching lignocellulosic materials in which a charge of a lignocellulosic material is biopulped and/or water extracted prior to pulping and bleaching. The...
8647469 Method, system and withdrawal screen section for impregnating chips  
The method, system and a withdrawal screen section are for the impregnation of chips during the manufacture of chemical pulp. Chips are both steamed and impregnated in a low pressure impregnation...
8524037 Continuous digestion of chip blends containing a western red cedar chip furnish  
A process is provided for delignifying lignocellulosic material, including feeding a lignocellulosic blend comprising a Western Red Cedar (WRC) chip furnish and a second lignocellulosic material...
8486228 Lignocellulosic biomass saccharification pre-treatment device  
Provided is a lignocellulosic biomass saccharification pre-treatment device capable of producing a pretreated material for saccharification. The lignocellulosic biomass saccharification...
8475627 Process of treating a lignocellulosic material  
A process of treating a lignocellulosic material includes a pre-extraction step in which hemicellulose is extracted from the lignocellulosic material. In one embodiment, the pre-extraction step...
8449717 Method for preventing clogging in a strainer construction for a continuous digester  
The method is for influencing the flow from a strainer construction in a continuous digester. In order to avoid clogging of the withdrawal compartment in the strainer construction, an additive...
8328983 Modified kraft fibers  
A method of producing a modified pulp for use in paper or paper web products, the method comprising treating wood chips in an extraction process to remove hemicellose to form treated wood chips;...
8303767 Methods of pretreating comminuted cellulosic material with carbonate-containing solutions  
Methods of pretreating comminuted cellulosic material with an acidic solution and then a carbonate-containing solution to produce a pretreated cellulosic material are provided. The pretreated...
8273212 Method for kraft pulp production where hemicelluloses are returned  
The method increases the yield and improves the beatability of kraft pulp. During the progression of the cooking process, more than one cooking liquor with a dissolved content of hemicellulose is...
8197639 Vapour phase digester and a method for continuous cooking  
The system and method reduce the liquid/wood ratio at the top of a vapor phase digester in a continuous digester plant. Chips that are to be cooked in the vapor phase digester are fed as a mixture...
8182650 Modified Kraft fibers  
A method of producing a modified pulp comprising treating wood chips in an extraction process to remove hemicellose to form treated wood chips; and subjecting said treated wood chips to chemical...
8080128 Method for increasing the concentration of xylose in lignocellulosic hydrolysate  
Disclosed is a method for increasing the concentration of xylose in lignocellulosic hydrolysate. The method includes the step of extruding lignocellulosic material and mixing the lignocellulosic...
8017820 Continuous flowing pre-treatment system with steam recovery  
The present invention is directed to a continuous process for pretreating a lignocellulosic feedstock. A feedstock slurry is provided, which has a solids concentration of 10% to 33% by weight. The...
7998310 Method for impregnating chips  
A method for the impregnation of untreated chips during the manufacture of chemical pulp. The untreated chips are fed without preceding steam treatment into an impregnation vessel that has an...
7943009 Process of treating a lignocellulosic material with an alkali metal borate pre-extraction step  
A process of treating a lignocellulosic material includes a pre-extraction step in which hemicellulose is extracted from the lignocellulosic material. In one embodiment, the pre-extraction step...
7901541 Method and arrangement for impregnating chips  
The method is for the impregnation of chips during the manufacture of chemical pulp. The chips are continuously fed without preceding steam treatment to the top of an impregnation vessel that...
7892397 Method of degumming cellulosic fibres  
A process for producing dissolving pulp includes a degumming step using a degumming liquor which includes hydrogen peroxide and ammonia.
7842161 Pre-extraction and solvent pulping of lignocellulosic material  
A process of treating a lignocellulosic material includes a pre-extraction step in which hemicellulose is extracted from the lignocellulosic material. Then, in a solvent pulping step, the...
7824521 Process of treating a lignocellulosic material with hemicellulose pre-extraction and hemicellulose adsorption  
A process of treating a lignocellulosic material includes a pre-extraction step in which hemicellulose is extracted from the lignocellulosic material. In one embodiment, the pre-extraction step...
7615134 Method and arrangement of impregnating chips  
The method and an arrangement are for improved impregnation of chips in association with the manufacture of chemical cellulose pulp. Un-steamed chips are fed into an impregnation vessel (30) in...
7604711 Method to optimize temperature profiles displacement batch cooking  
Method and apparatus for batch displacement digester systems to increase tank farm vessel temperatures for more efficient delignification rates by mitigating the formation of flow channels in the...
7569120 Method for converting an up-flow tower for cellulose pulp to a down-flow tower  
The method is for converting a vertically standing up-flow tower by inserting a freely insertable pipe into the conical part of the up-flow tower the tower is converted to a down-flow tower where...
7553394 Method for removing potassium from ash produced in a kraft pulping process recovery boiler using a Na-type cation exchange organic resin  
In the process for producing kraft pulp, performing a potassium ion removal step of flowing an aqueous solution containing ashes recovered from a combustion exhaust gas generated in a black...
7547374 Method for impregnating chips in a continuous digestion system  
A method for impregnating chips in a continuous digestion system with an impregnation vessel and a digester. The digestion system has a heat exchanger arranged between a first return line and a...
7540938 Method and system for energy savings in TMP by high temperature LC/MC refining of pulp  
A method for recovering heat from a pulp refining process comprising: discharging pressurized pulp from a high pressure refiner, wherein the pressurized pulp comprises a pressurized slurry of...
7520958 Modified kraft fibers  
A method of producing a modified pulp comprising treating wood chips in an extraction process to remove hemicellose to form treated wood chips; and subjecting said treated wood chips to chemical...
7501043 Steam treatment of chips with the addition of an acid liquid  
The method is for the pre-treatment of chips that are fed to a sulphate cooking process. Through the addition of an acidic fluid to the steam treatment step, a very high ionic concentration of...
7459058 Feed of a mixture of chips and fluid from a low-pressure system to a high-pressure system  
Chips are sluiced from a low-pressure section to a high-pressure section with a sluice feeder. The fluid that is used to expel the chips from the sluice feeder principally includes pressurized...
7455749 Gas phase continuous digester having an inverted top separator with liquor injection  
A method for adding cooking liquor into a vapor phase continuous digester for producing chemical cellulose pulp from cellulose chips including: introducing a slurry of the cellulose chips from a...
7445691 Impregnation of chips with an acid liquid prior to a sulphate pulping process  
The method is for pre-treatment of chips that are fed to a sulphate cooking process. Through acidification of the chips in an acidic treatment fluid with a subsequent draining of free treatment...
7422657 Method for the feed of cellulose chips during the continuous cooking of cellulose  
The method is for feeding a chips-slurry from a low-pressure to a high-pressure system during the continuous cooking of chemical cellulose pulp. The feed takes place through a sluice feeder 53′...
7374637 Method of bleaching cellulose pulp with a main conduit for wash liquor and filtrate  
The method is for bleaching cellulose pulp in a bleach line that has at least two bleaching steps. The filtrate distribution is led up through the bleaching line counter-currently to the flow of...
7368037 Refiner steam separation system for reduction of dryer emissions  
A refiner steam separation system according to the present invention includes a blowline for transporting a mixture of fiber material from a refiner to an inlet of a steam separator. Waste steam...
7351305 Method and a digester for the continuous cooking of wood raw material to cellulose pulp  
The digester and method are for the continuous cooking of pulp. At least two withdrawal positions (11E, 11D) for cooking fluid are arranged at different heights in the digester (10). The cooking...
7279070 Method for the continuous cooking of wood raw material for cellulose pulp  
The invention concerns a simplified method for the continuous cooking of wood raw material in the form of sawdust for the production of cellulose pulp, The method does not require any thickening...
7229525 Methods to enhance pulp bleaching and delignification  
A method to enhance brightness in Chemical and Mechanical pulps comprising adding an organic sulfide chelant is described and claimed. A method to enhance delignification in a Chemical pulp...
7226525 Process for producing very low COD unbleached pulp  
A pulp product that has a low COD is comprised of an unbleached pulp that is soaked and washed in alkaline water for a sufficient time so that the COD after soaking and washing is less than or...
7217338 Process for continuously cooking chemical cellulose pulp  
The process is for continuously cooking chemical pulp in a digester system consisting of at least one vessel for impregnating and cooking comprising an inlet into which a mixture of chips and...
RE39208 Method of treating material in a continuous digester  
A comminuted cellulosic fibrous material treatment vessel assembly includes a substantially vertical vessel having a top, bottom, and outlet, and through which the material flows in a flow...
7081184 Process for making a very low COD unbleached pulp  
A process for making a pulp product that has a low COD is comprised of soaking and washing pulp in alkaline water for a sufficient time so that the COD after soaking and washing is less than or...
7081183 Method of deresinating pulp using alkyl alcohol alkoxylate surfactants  
This invention is a method of reducing the resin content of chemical pulps comprising heating wood chips in an aqueous alkaline medium in the presence of an effective deresinating amount of an...
7060162 Chip bin  
A chip bin for a digester has an upper part through which chips fall freely from an inlet and a lower part within which the chips remain until they are fed to a digester. Steam orifices strike...
7056418 Cooking method for pulp  
A lignocellulose material is cooked by means of an alkaline cooking liquor containing polysulfides in the presence of a quinone-hydroquinone compound, of which the oxidation-reduction potential in...
6986829 Process and container for stacking high-consistency stock  
Process and container for stacking and diluting paper fiber stock. The process includes stacking a high-consistency stock in a first volume for defined dwell time, conveying stock to second volume...
6966970 Method for supplying washing liquid to a process for cooking cellulose pulp  
The invention relates to a method for supplying washing liquid to a digester (1) for cellulose pulp and a subsequent diffuser washing device (2a, 2b). A high, disturbance-free production capacity...

Matches 1 - 50 out of 193 1 2 3 4 >