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1. WO2020136308 - MONITORING AND CONTROLLING HYDROPHOBIC COMPONENTS IN A PULP PROCESS

Publication Number WO/2020/136308
Publication Date 02.07.2020
International Application No. PCT/FI2019/050921
International Filing Date 20.12.2019
Chapter 2 Demand Filed 28.10.2020
IPC
G01N 15/06 2006.01
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
15Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
06Investigating concentration of particle suspensions
G01N 21/64 2006.01
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
21Investigating or analysing materials by the use of optical means, i.e. using infra-red, visible or ultra-violet light
62Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
63optically excited
64Fluorescence; Phosphorescence
G01N 33/34 2006.01
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
33Investigating or analysing materials by specific methods not covered by groups G01N1/-G01N31/131
34Paper
CPC
G01N 15/06
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
15Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
06Investigating concentration of particle suspensions
G01N 2015/0053
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
15Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
0042Investigating dispersion of solids
0053in liquids, e.g. trouble
G01N 21/85
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
21Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
84Systems specially adapted for particular applications
85Investigating moving fluids or granular solids
G01N 21/94
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
21Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
84Systems specially adapted for particular applications
88Investigating the presence of flaws or contamination
94Investigating contamination, e.g. dust
G01N 33/343
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
33Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
34Paper
343paper pulp
Applicants
  • KEMIRA OYJ [FI]/[FI]
Inventors
  • JOENSUU, Iiris
  • PIIRONEN, Marjatta
  • BERGERON, Andy
  • BJERKETVEDT, Travis
Agents
  • KOLSTER OY AB
Priority Data
2019543727.05.2019FI
62/785,86228.12.2018US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) MONITORING AND CONTROLLING HYDROPHOBIC COMPONENTS IN A PULP PROCESS
(FR) SURVEILLANCE ET CONTRÔLE DE COMPOSANTS HYDROPHOBES DANS UN PROCESSUS DE PÂTE À PAPIER
Abstract
(EN)
A sample of an aqueous stream is conducted to an optical measurement device. A hydrophobic dye is added. The sample is fractionated into fractions according to particle size or mass. The fluorescence intensity values and light scattering intensity values for the fractions are measured. The fluorescence intensity values of the fractions are added together thus obtaining a sum of the fluorescence intensity values. The light scattering intensity values of the fractions are added together, thus obtaining a sum of the light scattering intensity values. A hydrophobicity density of the particles in the sample, is calculated by dividing the sum of the fluorescence intensity values with the sum of the light scattering intensity values, and the concentration of hydrophobic contaminants in the aqueous stream is monitored and controlled based on the calculated hydrophobicity density of the particles in the sample.
(FR)
Selon la présente invention, un échantillon d'un flux aqueux est conduit vers un dispositif de mesure optique. Un colorant hydrophobe est ajouté. L'échantillon est fractionné en fractions en fonction de la taille ou de la masse de particules Les valeurs d'intensité de fluorescence et les valeurs d'intensité de diffusion de lumière des fractions sont mesurées. Les valeurs d'intensité de fluorescence des fractions sont additionnées ensemble, ce qui permet d'obtenir une somme des valeurs d'intensité de fluorescence. Les valeurs d'intensité de diffusion de lumière des fractions sont additionnées ensemble, ce qui permet d'obtenir une somme des valeurs d'intensité de diffusion de lumière. Une densité d'hydrophobicité des particules dans l'échantillon est calculée par la division de la somme des valeurs d'intensité de fluorescence avec la somme des valeurs d'intensité de diffusion de lumière, et la concentration de contaminants hydrophobes dans le flux aqueux est surveillée et contrôlée en fonction de la densité d'hydrophobicité calculée des particules dans l'échantillon.
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