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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...
8057639 System and method for preextraction of hemicellulose through using a continuous prehydrolysis and steam explosion pretreatment process  
A system has been developed for pretreating cellulosic biomass feed stock including: a first pressurized reactor receiving the feed stock, wherein the feed stock undergoes hydrolysis in the first...
7887671 Method for dilution of cellulose pulp  
The method and a device is for the dilution of dewatered cellulose pulp that maintains a consistency of 20-30% or greater. By shredding of the pulp to a finely divided dry-granulate, dilution to a...
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...
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...
7560008 Extraction with compaction and springback considerations  
A vessel is constructed with (preferably substantially stationary) screen surfaces which minimize compaction of comminuted cellulosic fibrous material, and allow springback of the material, as it...
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...
7384502 Process for impregnating, refining, and bleaching wood chips having low bleachability to prepare mechanical pulps having high brightness  
Wood chips having low bleachability are impregnated with a chemical liquor at a pH range of 7-12 in aqueous solution and the chemical liquor from the impregnated chips is drained, whereby...
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...
7300540 Energy efficient TMP refining of destructured chips  
A system and method for thermomechanical refining of wood chips comprises preparing the chips for refining by exposing the chips to an environment of steam to soften the chips, compressively...
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...
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...
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...
6946072 Method and apparatus for washing a fibre suspension  
A method for washing a fibre suspension with washing liquid, in which, in accordance with the invention, the fibre suspension is introduced into an annular treatment channel (24) that has an inlet...
6841042 Feeding comminuted fibrous material using high pressure screw and centrifugal pumps  
A system and method for feeding comminuted cellulosic fibrous material such as wood chips to the top of a treatment vessel such as a continuous digester provide enhanced simplicity, operability,...
6544385 Channel pulper  
A pulper in a stock preparation system includes a housing with a fiber inlet, at least one water inlet, at least one outlet and an inner chamber. A plurality of rotatable augers extend into the...
6451163 Method of handling comminuted cellulosic fibrous slurry in a cylindrical vessel  
In a cellulose pulp handling vessel having a first diameter material storing or treating portion above a second diameter discharge which is at least 20% less than the first diameter, reduced...
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...
6432264 Method of making a vessel assembly for handling comminuted cellulosic fibrous material  
In a cellulose pulp handling vessel having a first diameter material storing or treating portion above a second diameter discharge which is at least 20% less than the first diameter, reduced...
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...
6419786 Method for bleaching wood pulp containing recycled paper  
A method of treating wood-fiber pump, particularly wood-fiber pulp that contains recycled paper, comprises delivering the pulp to and advancing the pulp in a heating zone while delivering steam to...
6416621 Apparatus, process and pressure reactor for the treatment of solids with pressurized liquid gases  
The invention relates to a process for the treatment of solids with pressurized liquid gases, in particular liquid ammonia, with which the to be treated solid is fed into a pressure reactor at...
6409883 Methods of making fiber bundles and fibrous structures  
A method of making fiber bundles and fibrous structures. The efficacy of a fiber bundle in handling complex fluids may be improved by subjecting an aqueous suspension of fibers at high consistency...
6348127 Process for production of chemical pulp from herbaceous plants  
A process for production of chemical fibrous pulp for making paper, paperboard and other fibrous products from herbaceous plants, such as kenaf. Pulp from the herbaceous plant is made by a process...
6280567 System and method for treatment of cellulose-containing material prior to pulp digestion  
The invention relates to a process system and a method for preliminary treatment of disintegrated cellulose-containing material, preferably wood chips, prior to pulp digestion. The process system...
6228213 Production of microcrystalline cellulose by reactive extrusion  
This process involves feeding cellulose into an extruder with an acid solution. The extruder is comprised of a screw and a barrel. The screw is rotated so as to pressurize the cellulose, and the...
6123808 Distribution of dilution liquor to the discharge of a cellulose pulp digester  
In a pulp treatment vessel, such as a kraft pulp continuous vertical digester, a cellulose slurry is caused to flow in the vessel interior in a flow path. A substantially annular void is formed at...
5478439 Method for feeding cellulose pulp mixture to a pressurized continuous digester  
A system is provided for feeding wood or annual plant chips to continuous digesters for producing paper pulp. The system comprises two stages: in a first, impregnation stage, the chips are...
5466334 Method and apparatus for mixing a treatment agent with a pulp suspension  
Methods for mixing a treatment agent with a pulp suspension are disclosed including supplying the pulp suspension to a mixing chamber, moving the pulp suspension through a mixing zone with the...
5451296 Two stage pulp bleaching reactor  
A two stage ozone-pulp bleaching method and apparatus are disclosed. In the first stage, high consistency pulp particles are turbulently mixed and contacted with a gaseous mixture containing ozone...
5319902 Mass tower and method of making the same  
A mass tower for medium or high consistency fiber suspension includes a vertically elongated circumferential side wall defining a space for receiving the fiber suspension. The bottom portion of the...
5296097 Method for reducing contaminants in pulp prior to ozone bleaching  
A process for conditioning an ozone gas recycle stream in an ozone pulp bleaching process, wherein the level of carbon dioxide in the recycle stream is controlled to allow full capacity operation...
5262003 Method and system for defibering paper making materials  
A process of preparing a suspension of paper making fibers in water for use in the making of paper includes the steps of treating a mass of fibrous materials, such as shredded waste paper...
5192396 Process for the continuous digestion of cellulosic fiber material  
A process for the continuous digestion of cellulosic fiber material is described wherein the material is impregnated with liquid in a closed system comprising a concurrent flow zone and a...
5183578 Process for the extraction or flushing out of a substance from a heterogenous system, and installation for carrying out the process  
The process and the continuously working installation are intended for the extraction or flushing out of a substance from a heterogenous system with a solid phase of fibrous or granular material by...
5120398 Arrangement for discharging pulp from a pulp treatment apparatus  
An arrangement for discharging medium consistency pulp in connection with diffeent pulp treatment devices or apparatuses, the arrangement having a mass chamber, which is arranged between a screw...
4997578 Method and apparatus for dewatering and squeezing material  
An apparatus for dewatering and squeezing a water containing material comprises a drum with a sieve mantle defining two co-operating drum sections, each comprising a feed screw extending therein....
4997488 Combined physical and chemical treatment to improve lignocellulose digestibility  
A synergistic combination of high-shear mechanical disruption and alkali pretreatment in a high solids reaction mixture constitutes a significant improvement in the alkaline peroxide treatment of...
4983256 Method for the manufacture of a paper pulp for currency use  
In the method for the manufacture of a paper pulp for currency use from a stock comprising textile fibers, the operations of boiling, bleaching, chopping, breaking, cutting and washing of the...
4968385 Method of preparing a plup using a fluidizing centrifugal pump during impregnation  
A method of preparing a pulp for digestion in a continuous process from a fiber-containing cellulose material is described. It comprises the following sequential steps: (a) preimpregnating the...
4963270 Decker with partitions for filtrate fractions  
A decker comprises a tank having a thickening drum mounted rotatably therein and including a filtering shell. The inside of the drum communicates with an inlet for feeding mass, whose consistency...
4954221 Apparatus for feeding lignocellulose-containing material through a steam screen into a refiner  
In a refiner (40) with two opposed discs (47,48) rotatable relative to each other fibre pulp is manufactured from lignocellulose-containing material. The material is advanced in a channel...
4915830 Pulp wash press  
An elongated, imperforate housing (2) has a slurry inlet port (5) at one end and a pulp discharge port (6) at the other end. A pressing section (2b) within the housing is in direct fluid...
4897155 Method for producing low fines content pulp by subjecting cellulosic chips to low frequency compression-relaxation cycles  
A method for producing low fines content pulp having successive treatment stages in each of which compressive and shearing forces are applied to the cellulosic fiber while simultaneously one or...
4869783 High-yield chemical pulping  
A chemical pulping process is disclosed wherein wood chips are partially defiberized such that the fibers in the chips are substantially separated from one another but sufficient interfiber bonding...
4867846 Apparatus for feeding wood chips to a treatment bin  
Apparatus for feeding wood chips and the like into a treatment bin includes a feed tube assembly adapted to lead into the bin at a non-zero angle relative to the horizon. A plate is supported...
4838995 Process for bleaching cellulose pulp, a plant for preforming said process, and a screw press for use with said process and plant  
For bleaching cellulose pulp or a fraction thereof, e.g. reject pulp, the cellulose pulp or fraction, having a concentration of 0.5-10%, preferably 3-6%, is introduced into a screw press comprising...
Matches 1 - 50 out of 84 1 2 >