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Class 162/23 - Mechanical defibration in the presence of heated gas or gas under pressure


Subclass of Class 162 - Paper making and fiber liberation
Definition: Processes in which the fibrous material is subjected simultaneously
No. of patents: 99
Last issue date: 03/15/2011


1      
NumberTitleIssue Date
7905983Refiner 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 is discharged from the separator through a waste steam outlet. Cleaned ...
03/15/2011
7846294Method of refining destructured chips
A system 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 destructuring and dewatering the softened chips to a solids consistency above 55 perce...
12/07/2010
7718034Refiner 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 is discharged from the separator through a waste steam outlet. Cleaned ...
05/18/2010
7713381TMP refining of destructured chips
A system 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 destructuring and dewatering the softened chips to a solids consistency above 55 perce...
05/11/2010
7381303System 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 Stabilization layer consists of a multivariable model predicative ra...
06/03/2008
7368037Refiner 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 is discharged from the separator through a waste steam outlet. Cleaned ...
05/06/2008
7314538Process and device for discharging lignocellulose raw materials from a digester and conveying the raw material to a refiner
A process for refining lignocellulose raw materials, especially wood chips, saw dust, annual plants or wood waste, includes dewatering the lignocellulose raw materials discharged from a digester, extracting condensate produced during dewatering, and refining the dew...
01/01/2008
7303707Processing of ligno-cellulose materials
A method of processing lignocellulosic material includes the steps of comminuting the material to a size that it can be processed in a hydrothermal pressure vessel, drying the material in moving air to obtain a specific moisture content, packing the material into th...
12/04/2007
7300540Energy 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 destructuring and dewatering the softened chips to a solids consistency abo...
11/27/2007
7300541High 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 and discharging the compressed material from the screw device into a de...
11/27/2007
7300550High intensity refiner plate with inner fiberizing zone
Plate elements, a plate configuration, and associated system for thermomechanical refining of wood chips wherein destructured and partially defibrated chips are fed to a rotating disc primary refiner, where opposed discs each have an inner band pattern of bars and g...
11/27/2007
7291247Absorbent sheet made with papermaking fibers with durable curl
A process for bleaching high bulk cellulosic fiber and producing a durable elevated curl index includes: (a) concurrently bleaching, heat treating and convolving cellulosic fiber pulp at elevated temperature and pressure at high consistency generally under condition...
11/06/2007
7264690Catalyzer for clean pulping and process for using the same
A catalyzer for clean pulping includes sodium salicylate, anion silicate softener, cooking aids, liquid(gaseous) chlorine and water. A process for using the catalyzer for clean pulping includes the following steps: 1, cutting and impurities removing for the r...
09/04/2007
7237733Method and apparatus for producing mechanical fibers
The purpose of this invention is to provide a method and an apparatus for producing thermomechanical fibers using less energy per ton that has previously been required for similar type of production. The invention is based in that at least two refiners are combined ...
07/03/2007
7191967Refiner
A refining surface for a refiner intended for defibrating lignocellulose-containing materials, the refiner having at least two refining surfaces arranged coaxially relative to each other, at least one of which rotates around a shaft, and between which the material t...
03/20/2007
7179347Method for fiber stock preparation
A method for the preparation of fiber stock for the production of paper or cardboard, including the steps of: a) Supplying fibers in the form of a suspension that has a predetermined solids content, b) Loading of t...
02/20/2007
7128216Closed air circulation system
The invention relates to a closed air circulation system for an apparatus used for sorting wood chips, containing chips in a variety of sizes and/or fines particles, in a wood chips processing chamber, in separate fractions by means of a gas flow, which is delivered...
10/31/2006
7018955Drilling fluid, apparatus, and method
Disclosed are drilling fluids that include carboxyalkylated corn hulls in an amount effective to inhibit fluid loss from a wellbore formation. The carboxyalkylated corn hulls are heat stable and surprisingly effective at inhibiting fluid loss. Also disclosed are a d...
03/28/2006
7018509Elimination of alum yellowing of aspen thermomechanical pulp through pulp washing
This invention relates to an improved process for manufacturing bleached thermomechanical aspen pulp having reduced yellow after treatment with aluminum based chemicals such as alum which are used in paper making processes. In this improved process the pulp is washe...
03/28/2006
7008505Eucalyptus biomechanical pulping process
In a new process for preparing pulped wood chips for paper making, chips from a hardwood such as eucalyptus are inoculated with aliving culture of one or more white rot fungi. The fungi propagate throughout the body of the wood chip, selectively attacking the lignin...
03/07/2006
7005034Method in connection with the production of mechanical pulp
A method in connection with the production of mechanical pulp from a cellulose containing material wherein the material is processed in at least one refining step to produce pulp. According to the invention, the pulp is fractionated (4), after a first refinin...
02/28/2006
6957785Refining segment for a rotatable refining disc, and a refining apparatus comprising a refining disc with such refining segment
Apparatus for use as a portion of a refining surface of a rotatable refining disk is disclosed. The apparatus includes a refining segment having a periphery and being mountable on a rotatable refining disk in juxtaposition with an opposing refiner disk for treating ...
10/25/2005
6939438Apparatus for loading fibers in a fiber suspension with calcium carbonate
An apparatus for loading fibers in a fiber suspension with calcium carbonate has a housing with an inlet and an accept outlet. A rotatable distribution member is positioned within the housing. A rotor and stator assembly is positioned within the housing radially out...
09/06/2005
6899790Method of providing papermaking fibers with durable curl
A process for producing high bulk cellulosic fiber exhibiting a durable elevated curl index includes: (a) concurrently heat treating and convolving cellulosic fiber pulp at elevated temperature and pressure at high consistency under conditions selected so as to prec...
05/31/2005
6899791Method of pretreating lignocellulose fiber-containing material in a pulp refining process
A method and apparatus for pretreating or conditioning lignocellulose fiber containing feed material in preparation for conversion to pulp. Wood chips are pretreated under conditions of elevated temperature, pressure and humidity and subsequently compressed to cause...
05/31/2005
6778936Consistency determining method and system
A system (30) and method for determining stock consistency and for using consistency as a process variable to control some aspect of operation of a refiner (32) used to refine stock. The system includes at least one sensor (70 or 180) fro...
08/17/2004
6673211Apparatus for loading fibers in a fiber suspension with calcium carbonate
An apparatus for loading fibers in a fiber suspension with calcium carbonate has a housing with an inlet and an accept outlet. A rotatable distribution member is positioned within the housing. A rotor and stator assembly is positioned within the housing r...
01/06/2004
6673201Top separator with intraseal for digester vessel in a pulp or fiber processing system
A top separator assembly for a digester is disclosed comprising: a rotatable shaft for the top separator; a packing for the shaft; and a sealing ring operatively mounted to the shaft and having a nominal clearance with the pack box, said sealing ring moun...
01/06/2004
6627041Method of bleaching and providing papermaking fibers with durable curl
A process for bleaching high bulk cellulosic fiber and producing a durable elevated curl index includes: (a) concurrently bleaching, heat treating and convolving cellulosic fiber pulp at elevated temperature and pressure at high consistency generally unde...
09/30/2003
6464826Method for producing and treating wood fiber
Method is disclosed for treating wood chips including a heater for preheating the wood chips in the presence of steam, a beater to mechanically process the wood chips into wood fibers, a cyclone for separating the wood fibers from steam and volatile organ...
10/15/2002
6364998Method of high pressure high-speed primary and secondary refining using a preheating above the glass transition temperature
The combination of low residence time (R) with high saturation pre-heat temperature/pressure (T) followed by high speed disc refining (S), is utilized in both primary and secondary refining stages. This use of the RTS process in both primary and secondary...
04/02/2002
6364997Raw stock for photographic paper
The invention relates to a imaging element comprising a paper having a surface roughness average of between 0.13 and 0.44 micrometers....
04/02/2002
6346165Method for production of lignocellulosic composite materials
A method for improving the bondability of annual plant materials to a formaldehyde-based resin including the steps of: (a) providing a straw plant material having a plurality of fibers with each of the fibers surrounded by a waxy and silica layer; (b) ext...
02/12/2002
6200417Process and device for mixing stock suspensions
Process and device for the mixing of suspensions with possibly different natures and/or compositions in the stable section of a paper machine. In the process, a suspension, particularly of the backwater of the paper machine, is piped in a mixing tube with...
03/13/2001
6165317Control of refined pulp quality by adjusting high temperature pre-heat residence time
A method for refining lignocellulose-containing material into pulp in a disc refiner comprises preheating the material to a temperature greater than the glass transition temperature of lignin in the material, and holding this temperature for under one min...
12/26/2000
6073865Process and devices for manufacturing a hot friable material
A process is disclosed that is utilized in particular in the preparation of fibrous material of used paper. Hot fibrous pulp friable materials, which are especially suitable for dispersing, are first formed in a compact, high-consistency fibrous material ...
06/13/2000
5853534Method of producing pulp with high yield using a two-stage refining system operating at different temperatures
A method of producing mechanical and chemi-mechanical pulp with a yield above 85 % from lignocellulose-containing material for the manufacture of paper or board products. The material is subjected to mechanical processing in at least two steps. The materi...
12/29/1998
5776305Low-resident, high-temperature, high-speed chip refining
A method for refining lignocellulose-containing material into pulp in a disc refiner comprises preheating the material to a temperature greater than the glass transition temperature of lignin in the material, and holding this temperature for under one min...
07/07/1998
5733412Decolorizing brown fibers in recycled pulp
The invention relates to a method for decolorizing paper pulp containing colored fibers. The paper is first pulped and subjected to fine screening. The screened pulp is then dispersed at a temperature in excess of 100° C. and a pressure exceeding one atm...
03/31/1998
5656129Method of producing fibers from a straw and board products made therefrom
A method of refining wheat straw into fibers cuts the straw to a length of between about two and about four inches, wets the straw, softens the straw by subjecting the straw to pressurized steam and refines the softened straw in a pressurized mechanical r...
08/12/1997
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