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8009277 Sensor technique for black liquor oxidation control  
A method for determining simultaneously from an oxidized black liquor sample an amount of sulfide, an amount of total dissolved solids, and an amount of effective alkali present in the sample,...
7985318 Method of monitoring and inhibiting scale deposition in pulp mill evaporators and concentrators  
A method of monitoring and inhibiting scale precipitation and deposition from spent liquor in pulp mill evaporators and concentrators is disclosed. The method includes connecting a black liquor...
7919067 Method and apparatus for controlling a causticizing process  
A method and an apparatus for controlling a causticizing process, the process comprising slaking, causticizing and white liquor preparation. The slaking is carried out using a slaker into which...
7674355 Method of measuring macro and micro stickies in a recycled sample containing pulp fibers  
A method of measuring macro and micro stickies in a recycled sample containing pulp fibers is disclosed. The method includes forming a slurry of the recycled macro stickies and a liquid and using a...
7658820 Digester wash extraction by individual screen flow control  
A continuous digester comprises a wash zone having a plurality of individual wash screens disposed about an inner wall of the digester for the withdrawal of co-current downflow liquor from the wash...
7609366 Material measurement system for obtaining coincident properties and related method  
A material measurement system (500) includes a THz generator including at least one laser source (111) for emitting optical pulses, the optical pulses coupled to a THz emitter (51) operable for...
7604712 Method for determining chemical pulp kappa number with visible-near infrared spectrometry  
A method for the determination of a cellulosic-fibre property, namely, residual lignin content or Kappa number of chemical pulp, with the aid of a spectroscopic technique obtained over a range...
7566382 Method and arrangement for controlling short circulation in a paper machine or the like  
A method and arrangement for controlling short circulation in a paper machine, in which the control of at least one property of the diluted fiber-containing pulp conducted to the headbox is based...
7396437 Method and system for controlling the web formation  
Method and system for controlling web formation in the forming section of a paper machine includes measuring the amount of white water occurring during drainage in at least one drainage region of...
7390669 Simultaneous and rapid determination of multiple component concentrations in a Kraft liquor process stream  
The present invention is a rapid method of determining the concentration of the major components in a chemical stream. The present invention is also a simple, low cost, device of determining the...
7387708 Process for feeding pulp into a blow tank or storage tank  
A method and apparatus for treating pulp in connection with a blow tank or a storage tank. The pulp is discharged from a batch digester and fed either to the upper or the lower part of a blow tank,...
7384503 Determination of contaminant particles in an aqueous pulp  
A method and system for determining trace oversize contaminant particles in a paper-making pulp employs a screen assembly having a screen housing with a screen mounted therein, and ports for...
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...
7318880 Method for defibring recycled fiber material in a drum pulper, and a drum pulper  
The invention relates to a method for defibering recycled fiber material in a drum pulper provided with a substantially horizontal drum. Recycled fiber material and water are fed to the drum pulper...
7311848 Separation apparatus  
The present invention relates to a method of monitoring a liquid fluid mixture and a system carrying out the method. The invention also relates to the use of the system for monitoring liquid fluid...
7294234 Process and device for monitoring the condition of a belt  
Process and apparatus for monitoring the condition of a rotating belt in a paper or cardboard machine. The process includes recording data related to a condition of the belt, and creating an at...
7267744 Pulp treatment and process  
This invention provides a process for treating chemical woodpulp, or chemical cellulose including cotton linter, including the step of applying an electron processing technology (EPT) step to...
7204914 System and method for controlling a processor including a digester utilizing time-based assessments  
A system for controlling a processor having at least one sampling port connected to a stage of the processor in order to sample a reactant product from the processor. The system includes a...
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...
7153391 Method in connection with the production of pulp, paper or paperboard  
Method for predicting properties of a product of cellulose-fibre-based pulp, paper or paperboard, wherein a suspension of cellulose fibre is subjected to analysis, during manufacture of the...
7138036 Monitoring device  
A monitoring apparatus is provided which can ensure the prevention of a paper break even in a poor installation environment. A light source (9) illuminates light (9a) on a lateral edge (1a) of wet...
7128808 Method and apparatus for identifying mapping of paper machine actuator  
A method and an apparatus for identifying mapping of a paper machine by means of a mapping test. The invention comprises forming a mapping model which takes the linear and non-linear shrinkage of a...
7115188 Process and apparatus for monitoring dewatering in a wet section of a paper machine  
Process and apparatus for monitoring dewatering in a wet end section of a web production machine. The process includes measuring water flowing into the wet end section, measuring water flowing out...
7077930 Method for controlling screening by measuring flow amount consistency of the pulp  
The invention relates to a method of controlling quality of pulp. Pulp formed in mechanical defibering of wood is screened into at least two fractions, the accept that has passed the screening...
7074299 Process for using a phloroglucinol color delta to control blending, deinking and bleaching of groundwood-containing secondary pulp  
A method of processing papermaking fiber includes characterizing the initial color of the pulp and the color of the pulp after treatment with a phloroglucinol stain. The color response of the pulp...
7018509 Elimination 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...
6946056 Method for regulating the manufacturing of pulp by optically measuring the amount of hexenuronic acid  
Method for enabling the paper pulp production process to be controlled in such a way that the hexenuronic acid content in the pulp can be minimized and the color reversion of the pulp and/or the...
6939439 Batch process for producing chemical pulp by removing and reintroducing calcium-containing spent liquor in the digester  
Methods for producing chemical pulp from lignocellulose-containing material in processes for kraft pulp production are disclosed including charging the lignocellulose-containing material to a...
6913672 Methods for analyzing boron-containing alkaline pulping liquors  
Chemical species (e.g., metaborate, carbonate, hydroxide and sulfide) in a boron-containing alkaline wood pulping liquor sample are determined quantitatively by (i) subjecting a first aliquot...
6884320 Method and apparatus for producing and testing a fiber bed  
A method for producing and testing a fiber bed, includes a housing, a main inlet passage and a main outlet passage, a cavity in the housing in fluid connection with the inlet and outlet passages, a...
6846381 Method for controlling quality of pulp  
A method for controlling the quality of pulp. Pulp produced by mechanical defibering of wood is screened to provide at least two fractions, of which the accept that has passed the screening phase...
6841390 Method for sensing stickies  
A real-time system and method for measuring stickies by separating high molecular weight non-fibrous species from low molecular weight non-fibrous species and sensing the concentration of the high...
6833054 Method and apparatus for adjusting chemical dosage of pulp processing stage  
A method and an apparatus for adjusting a chemical dosage of a pulp processing stage. The method comprises measuring a change in a variable in dependence on the chemical dosage and the chemical...
6773552 Method of selecting and/or processing wood according to fibre characteristics  
The invention provides a method for predictively assessing one or more characteristics of wood pulp produced from solid wood. The method comprises the steps of determining the velocity of sound...
6772036 Control system using process model  
A control system is provided for controlling a process for making paper or paper pulp. The process has a process product output at an end of the process. The controls include a process variable...
6712937 Method of operating a machine for the manufacture and/or refinement of material webs  
System and method of operating a machine for manufacturing and/or refining a material web wherein the machine includes at least one machine section. The method includes arranging a plurality of...
6712936 Method for manufacturing paper and paperboard using fracture toughness measurement  
A mathematical model is used to design paper and paperboard having improved runnability. The mathematical model provides an estimate of fracture toughness for an optimized paper product based on...
6635147 Method for analyzing boron-containing alkaline pulping liquors  
Chemical species (e.g., metaborate, carbonate, hydroxide and sulfide) in a boron-containing alkaline wood pulping liquor sample are determined quantitatively by (i) subjecting a first aliquot...
6589389 Test method for determining bleed-throughs in old corrugated container fiber pulp  
A test method for analyzing an OCC fiber pulp, to quantify the content therein of contaminants creating bleed-throughs in a paper product formed from the pulp. A sample of the pulp is formed into a...
6551451 Method for determining liquid content in chemical pulps using ramen spectrometry  
A rapid method is provided for the on-line spectroscopic determination of lignin content and/or kappa number in wood pulps. Unlike currently available commercial instrumentation, the method enables...
6524437 Process for peroxide bleaching wherein the concentrations of Mn and Fe are monitored and maintained  
A process for peroxide bleaching of pulp using magnesium oxide or magnesium hydroxide as a substitute for caustic soda wherein the pulp is bleached in the presence of hydrogen peroxide...
6475339 Method for rapidly determining a pulp kappa number using spectrophotometry  
A system and method for rapidly determining the pulp kappa number through direct measurement of the potassium permanganate concentration in a pulp-permanganate solution using spectrophotometry....
6447639 Process for controlling a digester using real time measurement of moisture content and species of wood  
An on-line pulp digester control system. More particularly, this invention pertains to a control system which employs real time measurements from ion mobility spectrometry to automatically rapidly...
6432265 Sampling method and method for cleaning sampling apparatus  
The object of the invention is a sampling apparatus in a continuous industrial process for taking a sample of the substance to be monitored. The sampling apparatus is located on the wall of the...
6398914 Method and device for process control in cellulose and paper manufacture  
In the production of de-inked pulp, measuring devices are used to register spectral and/or physical characteristic values of a starting material. These values are then fed to a neural network, by...
6339222 Determination of ionic species concentration by near infrared spectroscopy  
A method for determining the concentration of hydrogen ion, organic anionic species and anionic species selected from the group consisting of OH−, CO3═, HS−, ClO3−, SO4═, S2O3═, polysulphid...
6332951 Method for measuring the content of bleaching chemicals used for bleaching cellulose fibers  
A method and a device for measuring the content of chemicals used in connection with bleaching of preferably cellulose fibers in a pulp, suspension for the purpose of providing a better and more...
6319359 Process for quantitatively detecting constituents of a pulp/fluid mixture  
Process and measurement device for quantitatively detecting constituents of a pulp/fluid mixture for paper and/or cardboard production. The device includes at least one radiation source for...
6302996 Method and apparatus for washing fiber pulp mixture  
The invention relates to a method of washing a fiber pulp mixture, in which method the fiber pulp mixture is fed between two filter wires running in the same direction. There is a convergent...
6287416 Sampling apparatus with removable filter for cleaning  
The object of the invention is a sampling apparatus in a continuous industrial process for taking a sample (16) of the substance to be monitored (11). The sampling apparatus is located on the wall...
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