Patents Assigned to Kemira Oyj
  • Publication number: 20160305890
    Abstract: The present invention concerns a method of optical measurement of an aqueous stream, and of processing the results of the measurement in order to determine the anionic charge of the stream, the method being carried out by measuring the light absorption of the stream and predicting the amount of anionic groups in the stream using a mathematical processing, such as mathematical calculations. Particularly, the method includes the steps of adding an amount of a cationic dye to the aqueous stream, measuring the light absorption spectra of the obtained dye-containing stream, and processing the obtained light absorption spectrum using said mathematical processing in order to obtain the anionic charge. The invention also concerns the use of the obtained spectrum in determining the turbidity of the stream, as well as a device suitable for use in carrying out the method.
    Type: Application
    Filed: November 18, 2014
    Publication date: October 20, 2016
    Applicant: KEMIRA OYJ
    Inventors: Lari Vähäsalo, Iiris Joensuu, Marjatta Piironen
  • Publication number: 20160288020
    Abstract: The invention relates to a process additive formulation and a method for foam reduction and/or for increasing drainage in a process comprising an aqueous medium. The process additive formulation comprises an acrylate and/or methacrylate copolymer, optionally with acrylic acid or methacrylic acid, in an organic diluent, and mineral oil or vegetable oil.
    Type: Application
    Filed: November 18, 2014
    Publication date: October 6, 2016
    Applicant: Kemira Oyj
    Inventors: Fredrick Vance, Robert Wilson
  • Publication number: 20160290924
    Abstract: The invention relates to a method for analysing a sample comprising at least a first and a second scale inhibitor, which scale inhibitors are synthetic organic compounds comprising at least one ionised group. The method comprises optionally diluting and/or purifying the sample, and allowing the sample interact with a reagent comprising lanthanide(III) ion. The sample is excited at a first excitation wavelength and a sample signal deriving from the lanthanide(III) ion is detected at a signal wavelength by using time-resolved luminescence measurement. The total concentration of the first and the second scale inhibitor is determined by using the detected sample signal, and the concentration of the first scale inhibitor in the sample is determined. The concentration of the second scale inhibitor is determined mathematically by using the obtained results for the total concentration and for the first scale inhibitor concentration.
    Type: Application
    Filed: November 18, 2014
    Publication date: October 6, 2016
    Applicant: Kemira Oyj
    Inventors: Vesa Nuutinen, Susanna Toivonen, James Johnstone, Harri Härmä, Mirva Lehmusto, Satu Tiittanen, Pave Väisänen, Joonas Siivonen, Paul Mundill
  • Publication number: 20160290923
    Abstract: The invention relates to a method for determining a scale inhibitor concentration in a sample comprising at least a first scale inhibitor, which is a synthetic organic compound comprising at least one ionised group. The method comprises optionally diluting and/or purifying the sample, and allowing the sample to interact with a reagent comprising a lanthanide(III) ion. The sample is excited at a first excitation wavelength and a sample signal deriving from the lanthanide(III) ion is detected at a signal wavelength by using time-resolved luminescence measurement, and the concentration of the at least first scale inhibitor in the sample is determined by using the detected sample signal.
    Type: Application
    Filed: November 18, 2014
    Publication date: October 6, 2016
    Applicant: KEMIRA OYJ
    Inventors: Vesa Nuutinen, Susanna Toivonen, James Johnstone, Harri Härmä, Paul Mundill
  • Publication number: 20160289266
    Abstract: The invention relates to a method for reducing colour of a biotechnological liquid. In the method a biotechnological liquid comprising colour forming substances is obtained and a high-basicity aluminium compound, which has a basicity of at least 0%, is added and mixed to the biotechnological liquid. Precipitate and/or flocks comprising colour forming substances are allowed to form, and the precipitate and/or flocks are separated from the biotechnological liquid.
    Type: Application
    Filed: November 5, 2014
    Publication date: October 6, 2016
    Applicant: Kemira Oyj
    Inventors: Susanna HOLAPPA, Michael RECKTENWALD
  • Patent number: 9421556
    Abstract: Depressants comprising one or more types of polysaccharides comprising one or more types of pentosan units are provided. Also disclosed are processes for enriching a desired mineral from an ore comprising the desired mineral and gangue, wherein the process comprises carrying out a flotation process in the presence of one or more collecting agents and one or more of the depressants.
    Type: Grant
    Filed: March 27, 2015
    Date of Patent: August 23, 2016
    Assignee: Kemira Oyj
    Inventors: Marcelo Moreira Da Costa, Jorge Eduardo Langsch, Paulo Henrique Morais, Lucas Moore
  • Patent number: 9422670
    Abstract: The invention concerns an aqueous starch-containing polymer dispersion obtainable by co-polymerization of ethylenically unsaturated monomers comprising: (a) from 20 to 50 wt % of at least one of styrene or substituted styrene; (b) from 20 to 60 wt % t-butyl (meth)acrylate; and, (c) from 0 to 20 wt % of at least one ethylenically unsaturated co-polymerizable monomer being different from (a) and (b), in the presence of (d) from 10 to 50 wt % cationic starch, wherein the sum of (a)+(b)+(c)+(d) is 100%. The invention further concerns preparation and use thereof.
    Type: Grant
    Filed: December 12, 2011
    Date of Patent: August 23, 2016
    Assignee: Kemira Oyj
    Inventors: Ralf Krückel, Martin Werner
  • Patent number: 9410289
    Abstract: The invention relates to a coating color composition for paper and/or paperboard comprising a pigment, optionally known additives used in coating compositions, and a binder substitute comprising styrene acrylate copolymer having mean particle size ?100 nm. The invention also relates to paper or paperboard coated with a coating color composition according to the invention.
    Type: Grant
    Filed: June 29, 2009
    Date of Patent: August 9, 2016
    Assignee: KEMIRA OYJ
    Inventors: Jonni Ahlgren, Antti Matula, Tarja Turkki
  • Patent number: 9359724
    Abstract: AKD cellulosic composition obtainable by flowing a stream of a cellulosic suspension through a shearing device and in which a molten alkyl ketene dimer (AKD) is metered in to the stream of cellulosic suspension in or prior to the shearing device. The AKD cellulosic composition is particularly suitable in the manufacture of sized paper and paperboard.
    Type: Grant
    Filed: November 12, 2012
    Date of Patent: June 7, 2016
    Assignee: KEMIRA OYJ
    Inventors: Alois Kindler, Mari Granstroem, Hubertus Kroener, Holger Kern
  • Patent number: 9347181
    Abstract: The present invention provides a method for increasing paper strength in papermaking process comprising adding to a pulp a composition comprising an anionic polyacrylamide (APAM) and a high charge cationic glyoxylated polyacrylamide (GPAM). The present invention also provides paper obtained with said method.
    Type: Grant
    Filed: November 22, 2013
    Date of Patent: May 24, 2016
    Assignee: KEMIRA OYJ
    Inventors: Chen Lu, Scott Rosencrance, Danny Nguyen
  • Patent number: 9341560
    Abstract: Embodiments of the present disclosure include methods to control the quantity of vapor phase corrosion, devices, and the like.
    Type: Grant
    Filed: January 21, 2013
    Date of Patent: May 17, 2016
    Assignee: KEMIRA OYJ
    Inventors: Marko Kolari, Tuija Suhonen, Jukka-Pekka Sirvio, Iiris Joensuu
  • Patent number: 9328462
    Abstract: One or more embodiments include paper, methods of making paper, compositions, and the like, are provided. In various exemplary embodiments described herein, a paper material may be formed by treating a cellulosic fiber or an aqueous pulp slurry with a treatment composition comprising an anionic polyacrylamide resin and an aldehyde-functionalized polymer resin.
    Type: Grant
    Filed: June 17, 2013
    Date of Patent: May 3, 2016
    Assignee: KEMIRA, OYJ
    Inventors: Junhua Chen, Chen Lu, Scott Rosencrance, Frank Zimmermann
  • Patent number: 9315722
    Abstract: Methods for improving friction reduction properties of an aqueous treatment fluid are provided, wherein the resultant aqueous treatment fluid has an improvement in friction reduction, when compared to a similar aqueous treatment fluid in which the inverted emulsion does not contain salt.
    Type: Grant
    Filed: October 1, 2012
    Date of Patent: April 19, 2016
    Assignee: Kemira Oyj
    Inventors: Logan Jackson, Harsha Kolla
  • Patent number: 9304120
    Abstract: The invention relates to a method and system for monitoring of particles properties in a stream and the use of such method and system. In particular, the invention concerns sampling of liquids like aqueous suspensions or filtrates that contain solid matter in forest industry, oil and mining industry, as well as in and water treatment, desalination or water reuse processes, and in subsequent measurement of the samples. A sample from a stream of liquid is dyed to stain particles contained in the sample, which is conducted to a first flow chamber having means for causing said sample to be divided into particle populations according to their size or mass. A liquid flow is applied through the first flow chamber to cause at least one particle population to flow into a second flow chamber.
    Type: Grant
    Filed: November 24, 2013
    Date of Patent: April 5, 2016
    Assignee: Kemira Oyj
    Inventors: Iiris Joensuu, Marjatta Piironen
  • Patent number: 9290393
    Abstract: Processes for forming high iron content ferric chloride solutions, reconstituting ferric chloride solutions, and transporting the stable ferric chloride solutions with the high iron content are disclosed.
    Type: Grant
    Filed: November 30, 2011
    Date of Patent: March 22, 2016
    Assignee: KEMIRA OYJ
    Inventors: Krister Eskilsson, Stig Gunnarsson, Jeffrey Campbell, Jan Pavlicek, Faziollah Azarnoush, Esko Tirronen
  • Patent number: 9278874
    Abstract: The invention relates to biocidal systems comprising zinc ions and an oxidizing or non-oxidizing biocide, their use, and methods for preventing or decreasing starch degradation in starch-containing process waters from pulp, paper or board production processes.
    Type: Grant
    Filed: September 28, 2012
    Date of Patent: March 8, 2016
    Assignee: KEMIRA OYJ
    Inventors: Marko Kolari, Jaakko Ekman, Satu Ikävalko
  • Patent number: 9279217
    Abstract: The invention relates to a method for making of paper, tissue, board or the like by using recycled fiber material as a raw material. The method comprises following steps: pulping recycled paper, board or the like in a pulper and obtaining a pulp flow comprising (i) an aqueous phase and (ii) at least recycled fibers and starch having low molecular weight, which are dispersed in the aqueous phase; adding a coagulant agent to the pulp flow or to an aqueous process flow comprising starch having low molecular weight; allowing the coagulant agent to interact with the starch having low molecular weight and optionally forming aggregates; and adding at least one flocculating agent, after the addition of the coagulant agent, to any flow, which comprises interacted coagulant agent, and forming a treated flow with starch comprising agglomerate(s); retaining at least part of the said aggregates and/or the said agglomerates to the fibers or to a web, which is formed.
    Type: Grant
    Filed: February 22, 2013
    Date of Patent: March 8, 2016
    Assignee: KEMIRA OYJ
    Inventors: Matti Hietaniemi, Kimmo Strengell, Asko Karppi, Marko Kolari, Jaakko Ekman
  • Publication number: 20160060147
    Abstract: Scale-inhibiting polymers, compositions comprising the scale-inhibiting polymers and methods for preventing scale formation in circulating fluid are provided. The scale-inhibiting polymers comprise two or more recurring monomers wherein in at least one recurring monomer is an allyl-sulfonate-containing monomer, and at least one recurring monomer is a styrene-sulfonate-containing monomer. The polymers, compositions and methods may be used in industrial processes including metal extraction from mineral ores.
    Type: Application
    Filed: April 24, 2014
    Publication date: March 3, 2016
    Applicant: Kemira Oyj
    Inventors: Lucas Moore, Laura Sanders
  • Patent number: 9272927
    Abstract: According to the invention, a method for the prevention of microbial growth in process waters is provided, wherein first a peracid compound, and thereafter a halogenated dialkyl hydantoin are dosed into said process water. Further, according to the invention, a combination for the prevention of microbial growth is provided, said combination comprising compounds to be dosed separately, said compounds being a peracid compound to be dosed first, and a halogenated dialkyl hydantoin to be dosed after the peracid compound, the weight ratio of the peracid compound to the halogenated dialkyl hydantoin being at least 2:1, wherein the amount of the peracid compound is calculated as active agent, while the amount of halogenated dialkyl hydantoin is calculated as active chlorine.
    Type: Grant
    Filed: November 7, 2007
    Date of Patent: March 1, 2016
    Assignee: KEMIRA, OYJ
    Inventors: Marko Kolari, Antti Heinänen
  • Patent number: 9254504
    Abstract: The invention relates to an arrangement for simulating creping of tissue. The arrangement comprises a sled with a test surface, which sled is arranged to travel along a linear path; heating means for heating the test surface; a spray unit with at least one spray nozzle, the spray unit being arranged along the linear path of the sled and the at least one spray nozzle being arranged to spray a chemical on the test surface; a creping unit comprising a creping blade, the creping unit arranged along the linear path of the sled after the spray unit and the creping blade arranged to pass over the test surface when the sled passes the creping unit; and measurement means for measuring data related to force between the creping blade and the test surface. The invention relates also to a method for simulating creping of tissue.
    Type: Grant
    Filed: January 24, 2014
    Date of Patent: February 9, 2016
    Assignee: KEMIRA OYJ
    Inventors: Henry Skoog, Pyry Hämäläinen, Vladimir Grigoriev