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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...
8951388 Method and system for efficient production of dissolving pulp in a kraft mill producing paper grade pulp with a continuous type digester  
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,...
8916023 Vapor phase hydrolysis vessel and methods related thereto  
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...
8795469 Method for preparing nonwood fiber paper  
Paper comprised solely of a nonwood fiber mix is demonstrated to meet the technical physical specifications of commercially produced papers made from wood. The esthetically impressive paper meets...
8734610 Two vessel reactor system and method for hydrolysis and digestion of wood chips with chemical enhanced wash method  
A reactor vessel system including: a first reactor vessel having a hydrolysate and liquid extraction screen, a first region above the extraction screen that is maintained at conditions promoting a...
8691049 Method for an energy efficient production of cellulose pulp in a continuous digester  
The method is for the production of cellulose pulp in a continuous digester system. Chips are impregnated in an impregnation vessel. The chips are then fed to a subsequent digester vessel in a...
8657960 Method and system for fractionation of lignocellulosic biomass  
Methods and systems for fractionating lignocellulosic biomass including hemicellulose, cellulose and lignin, including exploding the biomass cells to devolatilize the biomass, hydrolyzing 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...
8617354 Shaped cellulose manufacturing process combined with a pulp mill recovery system  
Provided is a process for manufacturing shaped cellulose materials from lignocellulose where a dissolving grade pulp is manufactured and dissolved in an aqueous alkaline or acidic solvent system...
8518213 Process for producing alcohol and other bioproducts from biomass extracts in a kraft pulp mill  
A method for the production of alcohol and other bioproducts from power boiler woody biomass extract containing hemicelluloses, with or without combining extract from wood prior to Kraft cooking....
8512512 System and method for preextraction of hemicellulose through using a continuous prehydrolysis and steam explosion pretreatment process  
A method including: pretreating biomass feed stock in a first pressurized reactor, wherein the feed stock undergoes hydrolysis in the first pressurized reactor; discharging the feed stock from the...
8500956 Process for producing a pulp  
The invention relates to a process for producing a dissolving pulp from a cellulosic starting material using the kraft process, comprising the step of cooking the starting material with a cooking...
8449720 Method of making paper  
The invention relates to a method of making a paper or paper board, in which method cut pulp is prepared by cutting basic cellulosic fiber pulp at the consistency of at least 25% so that the...
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...
8394235 Removal of inhibitory compounds during pre-treatment of lignocellulosic biomass  
A process for the pretreatment of lignocellulosic biomass, in particular during the production of ethanol from biomass. The process including a cooking step where the biomass is exposed to steam...
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;...
8317975 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...
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...
8262854 Method for recovering hydrolysis products  
An improved method for treating lignocellulosic material, including a prehydrolysis-mass transfer process, which produces a concentrated hydrolysate volume during the time required for the...
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...
8123864 Method and apparatus for conversion of cellulosic material to ethanol  
The present invention provides an apparatus and a method for conversion of cellulosic material, such as chopped straw and corn stover, and household waste, to ethanol and other products. The...
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...
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...
7988788 Process for rapid acid hydrolysis of lignocellulosic material and in a hydrolysis reactor  
Improvements in a process for rapid acid hydrolysis of lignocellulosic material and in a hydrolysis reactor, said lignocellulosic material being fed in different levels of a reactor and contacted...
7976675 Continuous digester system  
In a continuous digester system the digester system is greatly simplified by using a single vertical atmospheric vessel, replacing the conventional chip bin, steaming vessel, chip chute, high...
7871491 Method and arrangement for continuous cooking  
The continuous digester system has an inlet defined therein for the feed of a chips suspension and an outlet for the output of a cooked suspension of pulp. The suspension of chips is fed in to the...
7758720 High defiberization pretreatment process for mechanical refining  
A chip pretreatment process which comprises conveying the feed material through a compression screw device having an atmosphere of saturated steam at a pressure above about 5 psig, decompressing...
7758721 Pulping process with high defiberization chip pretreatment  
A chip pretreatment process which comprises conveying the feed material through a compression screw device having an atmosphere of saturated steam at a pressure above about 5 psig, decompressing...
7686919 Method and device for the continuous cooking of pulp  
The continuous digester system has an inlet defined therein for the feed of a chips suspension and an outlet for the output of a cooked suspension of pulp. The suspension or chips is fed in to the...
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...
7566380 Continuous digester with fluid circulation  
The arrangement concerns an improved design for at least one of the cooling, dilution and washing at the bottom of a continuous digester for the production of cellulose pulp. By arranging at least...
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...
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...
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...
7402224 Method for producing paper pulp, lignins, sugars and acetic acid by frantionation of lignocellulosic vegetable material in formic/acetic acid medium  
A method for producing paper pulp from a lignocellulosie vegetable raw material. The method includes contacting the raw material with a mixture of formic acid and acetic acid (in an amount more...
7381303 System and method for controlling a thermo-mechanical wood pulp refiner  
Thermomechanical pulp is an important process for producing fibrous mass used in papermaking. A two-level control strategy that stabilizes and optimizes the refining process has been developed....
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...
7351306 Cooking of cellulose pulp in a cooking liquor containing pre-evaporated black liquor  
The method is for cooking of cellulose pulp in which the raw material, preferably in the form of chips, undergoes a successive elevation of temperature towards the cooking temperature while the...
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...
7303649 Removal of inorganic elements from wood chips  
In a process of treating wood chips for reduction of the concentration of undesirable inorganic elements prior to cooking in a production line for chemical pulp, the wood chips, having entrapped...
7285179 Continuous digester for cellulose pulp including method and recirculation system for such digester  
The continuous digester is for producing chemical pulp to a process for operating this digester and to a feedback system for the cooking liquid. By means of implementing cooking zones 1st, 2nd,...
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...
7270725 Pretreatment of chips with white liquor prior to a treatment with black liquor  
The method is for the manufacture of cooked cellulose pulp in which the starting material, preferably chips, undergoes a successive increase in temperature towards cooking temperature. This is...
7252739 Method for distributing cellulose pulp of low and medium consistency in order to form a uniform pulp web  
The method is for distributing cellulose pulp that has a 2-12% consistency. A manifoid housing is in fluid communication with distributor housing. The distributor housing has holes that are...
7229524 Feeding arrangement for feeding of chips to chip bins  
The invention relates to a feed arrangement for feeding chips to chip bins (1) in the production of cellulose pulp in continuous digesters (16), in which the chip bin is constituted by a treatment...
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...
7156952 Method and arrangement for oxygen delignification of cellulose pulp  
The invention relates to a method and arrangement for alkaline oxygen delignification of cellulose pulp. By adding alkali in the final phase of the oxygen delignification one can ensure that an...
7112256 Method for continuous cooking of chemical pulp to improve heat economy  
A method for the continuous cooking of chemical pulp with the aim of achieving improved heat economy in a digester system having a vessel (1) for impregnation and a vessel (2) for cooking the...

Matches 1 - 50 out of 295 1 2 3 4 5 6 >