Matches 1 - 50 out of 275 1 2 3 4 5 6 >


Match Document Document Title
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 upper...
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. The...
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...
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...
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...
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 done...
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...
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...
6986828 Process for producing low DP microcrystalline cellulose  
A process for producing microcrystalline cellulose. The process comprising the following steps: a) preparation of a pulp by repulping,b) pressing of the pulp obtained in a),c) decompaction of the...
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...
6881298 Process for loading fibers with calcium carbonate in a plurality of reactors  
For a process and an apparatus for loading fibers contained in a pulp suspension with calcium carbonate, a calcium oxide and/or a medium containing calcium hydroxide is fed to the pulp suspension,...
6841036 Process for the oxygen delignification of pulp in two stages with higher pressure in the second stage  
A system and process for the oxygen delignification of pulp consisting of a lignocellulose-containing material that has a mean concentration of 8-18% pulp consistency. The oxygen delignification...
6808596 System for the oxygen delignification of pulp consisting of lignocellulose-containing material  
The system is for the oxygen delignification, in at least two reaction stages, of pulp that consists of lignocellulose-containing material having a mean concentration of 8%-18% pulp consistency....
6736934 Method of pretreating pulp in an acid tower prior to bleaching with peroxide  
The present invention relates to a method of pretreating, by acidification and chelation, of pulp to be bleached with peroxide. Especially, the invention relates to intensifying, and at the same...
6716307 Process and system for the removal of scale build-up  
A method to remove scale build-up in a vessel having at least one screen is described and involves placing a cover inside the vessel such that it is located beneath at least one screen to separate...
6699357 Process for continuous cooking of pulp  
The invention relates to a process for continuous cooking of wood chips at elevated pressure and temperature in a vertical digester (1) for production of chemically dissolved pulp. Fiber material...
6620292 Cellulose production from lignocellulosic biomass  
A multi-function process is described for the separation of cellulose fibers from the other constituents of lignocellulosic biomass such as found in trees, grasses, agricultural waste, and waste...
6582554 Continuous digester having a sectioned top separator with multiple liquor extraction ports  
A method is disclosed for extracting liquor from a cellulose slurry for a continuous digester comprising the steps of: providing the cellulose slurry of liquor and chips of cellulose fiber material...
6576084 Method of pretreating pulp with yield or strength-enhancing additive  
Chemical pulp is produced from a slurry of comminuted cellulosic fibrous material using a beneficial additive such as AQ, or polysulfide. In the first treatment zone the effective alkali...
6572734 Method for treatment of loose material  
A pre-treatment device for wood chips for pulping comprises a tube through which the wood chips fall into a digester. Steam is injected into the tube through rings of nozzles, which are angled...
6544384 Pretreatment of chips before cooking  
The strength properties of chemical cellulose pulp (particularly kraft pulp) are improved by substituting a cold impregnation soak for conventional impregnation procedures. After steaming, wood...
6533896 Method for the production of precleaned pulp  
A method for preparing pulp from lignin-containing cellulosic material is disclosed, including a step for acid cleaning of the lignocellulosic material, followed by alkaline delignification. The...
6475338 Method of minimizing transition metal ions during chemical pulping in a digester by adding chelating agent to the digester  
The production of chemical (e.g., kraft) cellulose pulp much more suited to totally chlorine free or elemental chlorine free bleaching is produced by reducing the bleaching chemical consumability...
6468390 Method for continuous cooking of lignocellulosic fiber material  
A method for continuous cooking of lignocellulosic fiber material, comprising the steps of sequentially (a) in a first stage, impregnating the fiber material in an impregnation liquid comprising...
6454900 Method for two-stage oxygen delignification of chemical pulp  
Methods for oxygen delignification of a pulp are disclosed, including initially delignifying the pulp at a delignification temperature of less than 90° C., adding oxygen to the pulp so that the ...
6447645 Feeding cellulose material to a treatment vessel  
A feed system for a cellulose pulp treating vessel (such as a continuous digester) is not limited by the required L/W ratio of the pump feeding a wood chip slurry to a high pressure transfer...
6419788 Method of treating lignocellulosic biomass to produce cellulose  
A multi-function process is described for the separation of cellulose fibers from the other constituents of lignocellulosic biomass such as found in trees, grasses, agricultural waste, and waste...
Matches 1 - 50 out of 275 1 2 3 4 5 6 >