Patents Assigned to Kemira
  • Method and composition for treating tailings
    Patent number: 11001761
    Abstract: A method and a composition for treating tailings from a separation process are disclosed, where bitumen is separated from mineral solids. Tailings include an aqueous phase with suspended solid particulate material and residual bitumen and have a dry solids content <25 weight-%. The method includes addition of a flocculating agent including polyacrylamide to the tailings, as well as addition of an auxiliary agent including ionic liquid to tailings in conjunction with the flocculating agent. Flocs, which include solid particulate material, are formed and the formed flocs are separated from the aqueous phase. The composition in a copolymer of (meth)acrylamide and an auxiliary agent comprising ionic liquid.
    Type: Grant
    Filed: December 7, 2017
    Date of Patent: May 11, 2021
    Assignee: Kemira Oyj
    Inventors: Thomas Fenderson, Lasse Kyllönen, Alistair King, Evangelos Sklavounos, Frances Fournier, Sukhjit Aujla
  • Compositions of dry acid polymers and uses thereof
    Patent number: 11001513
    Abstract: The present embodiments generally relate to the use of one or more polymers, e.g., one or more dry acid polymers and/or one or more dry acid polymers with salt, as flocculants, generally for treating tailings, e.g., oil sands tailings, in need of solid-liquid separation, e.g., in order to efficiently recycle water and/or to reduce the volume of tailings which may be transferred to a tailings pond and/or a dedicated disposal area.
    Type: Grant
    Filed: October 10, 2017
    Date of Patent: May 11, 2021
    Assignee: Kemira Oyj
    Inventors: Duane C. Wilson, Thomas Fenderson, Igal Maasen, Sukhjit Aujla
  • Method for controlling growth of microorganisms and/or biofilms in an industrial process
    Publication number: 20210127677
    Abstract: Disclosed is a method for controlling a biofilm, for removing a formed biofilm and/or for controlling a growth of microorganisms, preferably bacteria, in an aqueous environment of an industrial manufacturing process including cellulosic fibre material. In the method, a composition including a compound selected from a group consisting of 3-[(4-methylphenyl)sulphonyl]-2-propenenitrile and 4-amino-N-2-thiazolyl-benzenesulphonamide is administered to the aqueous environment of the process.
    Type: Application
    Filed: August 28, 2018
    Publication date: May 6, 2021
    Applicants: Kemira Oyj, University of Copenhagen
    Inventors: Jaakko Simell, Marko Kolari, Michael Givskov, Tim Tolker-Nielsen, Morten Levin Rybtke, Jens Bo Andersen
  • Hydrotropic composition and its uses
    Patent number: 10995275
    Abstract: A hydrotropic composition including at least one surface active cationic component, which is selected from a group of cholinium, guadinium or tetramethylguadinium, preferably cholinium, and a straight or branched carboxylate anion having at least six carbon atoms and its uses, for treating of oil sands or the like, for treating tailings from separation of bitumen, asphaltenes or the like.
    Type: Grant
    Filed: January 11, 2018
    Date of Patent: May 4, 2021
    Assignee: Kemira Oyj
    Inventors: Alistair King, Evangelos Sklavounos, Tiina Laaksonen, Antti Rantamäki, Susanne Wiedmer, Lasse Kyllönen, Suvi-Katriina Ruokonen
  • Method and system for optimization of coagulation and/or flocculation in a water treatment process
    Patent number: 10988392
    Abstract: Methods and systems are disclosed for optimization of coagulation and/or flocculation in a water treatment process. According to exemplary embodiments, samples are taken from an aqueous liquid and the samples are monitored with an imaging device to capture visual data of particles dispersed or suspended in the liquid. The particles are classified into particle types based on the visual data and a particle size distribution indication is computed for each classified particle type. The particle size distribution indication is then compared to a predetermined particle size distribution value, and in response to a difference detected, dosage of at least one coagulation and/or flocculation agent in the water treatment process can be adjusted.
    Type: Grant
    Filed: March 31, 2017
    Date of Patent: April 27, 2021
    Assignee: KEMIRA OYJ
    Inventors: Marjatta Piironen, Iiris Joensuu, Mehrdad Hesampour
  • Dry strength composition, its use and method for making of paper, board or the like
    Publication number: 20210102343
    Abstract: A dry strength composition for manufacture of paper, board or the like is disclosed. The dry strength composition includes, as a mixture, at least one anionically derivatized polysaccharide, and cationic starch having an amylopectin content ?80 weight-%. The anionically derivatized polysaccharide and the cationic starch provide the composition with a charge density in a range of 0.1-1.5 meq/g, when measured at pH 2.8, and ?0.1-?3 meq/g, preferably ?0.3-?2.5 meq/g, more preferably ?0.5-?2.0 meq/g, when measured as an aqueous solution, at pH 7.0. Further disclosed are a use of the composition and a method for manufacturing paper, board or the like.
    Type: Application
    Filed: January 18, 2019
    Publication date: April 8, 2021
    Applicant: Kemira Oyj
    Inventors: Matti Hietaniemi, Asko Karppi, Jonas Konn
  • METHOD FOR MANUFACTURING PAPER OR BOARD AND PAPER OR BOARD PRODUCT
    Publication number: 20210102342
    Abstract: A manufacturing method of a paper, board or the like having a grammage in a range of 125-600 g/m2, preferably 150-210 g/m2, including adding a paper sizing agent including maleated vegetable oil and an alkenyl succinic anhydride (ASA) to a fibre stock including at least 80 weight-% of recycled fibre material and having calcium concentration of at least 500 mg/l, expressed as CaO.
    Type: Application
    Filed: March 26, 2018
    Publication date: April 8, 2021
    Applicant: Kemira Oyj
    Inventors: Elisabeth Lackinger-Csarmann, Johannes Fallmann, Alexander Wahl, Thomas Schwind, Jürgen Sartori, Samuel Okoli
  • Process for making paper, paperboard or the like
    Patent number: 10954633
    Abstract: An improved process for making paper or paper board is provided. The process comprises providing a cellulosic fibre suspension comprising recycled fibre material, and having a conductivity of at least 1.5 mS/cm; and adding a glyoxalated copolymer of acrylamide and cationic monomers and inorganic siliceous microparticles to the fibre suspension, sequentially or simultaneously. Advantages comprise improved productivity of the process, and paper strength.
    Type: Grant
    Filed: September 30, 2016
    Date of Patent: March 23, 2021
    Assignee: Kemira Oyj
    Inventors: Christopher Michael Lewis, William James Garrisi
  • Composition for modifying rheology of coating color, its use and a coating color
    Patent number: 10941300
    Abstract: The invention relates to a composition for modifying rheology of coating colour and its use. The composition comprises an aqueous polymer dispersion, comprising a copolymer of monomer (a), which is at least one optionally substituted styrene, and monomer (b), which is at least one C1-C4-alkyl (meth)acrylate. The copolymer has a particle size D50<100 nm. Composition comprises also degraded starch having an average molecular weight Mn<1000 g/mol.
    Type: Grant
    Filed: March 22, 2017
    Date of Patent: March 9, 2021
    Assignee: Kemira Oyj
    Inventors: Anneli Lepo, Helena Peuranen
  • Method for increasing dimensional stability of a paper or a board product
    Patent number: 10920375
    Abstract: The present invention relates to a process for producing a paper or a board product having increased dimension stability including providing a fibre slurry including never-dried fibres, treating the fibre slurry with a strength composition, and forming a paper or a board product from the treated fibre slurry, where the strength composition includes a permanent wet strength resin component and a sizing agent. The present invention further relates to a use of a strength composition for increasing dimensional stability of a paper and a board, and to a paper or a board product having improved dimensional stability.
    Type: Grant
    Filed: September 19, 2017
    Date of Patent: February 16, 2021
    Assignee: Kemira Oyj
    Inventors: Jan-Luiken Hemmes, Jonathan (Yingshuang) Wei, Rongjun Lu
  • Surfactant composition and method for treating bitumen froth
    Patent number: 10920149
    Abstract: The invention relates to a surfactant composition comprising an ionic liquid prepared from an unsubsituted or substituted primary, secondary or tertiary amine, or from an unsubstituted or substituted pyridine, amidine or guanidine with at least one fatty acid and/or resin acid. The invention also relates to a method for treating bitumen froth from a separation process, where bitumen is separated from mineral solids. The method comprises addition of said surfactant composition to the diluent and/or to the froth before phase separation.
    Type: Grant
    Filed: June 10, 2016
    Date of Patent: February 16, 2021
    Assignee: Kemira Oyj
    Inventors: Lasse Kyllönen, Sukhjit Aujla, Frances Fournier, Thomas Fenderson, Alistair King, Evangelos Sklavounos
  • Process for the preparation of arylsulfonylpropenenitriles by photocatalytic reactions
    Patent number: 10919847
    Abstract: A process for a preparation of arylsulfonylpropenenitriles is disclosed. A reaction starting from arylsulfonyl iodides is catalyzed by light. The process is scalable, environmentally benign and provides the product in good yield.
    Type: Grant
    Filed: August 27, 2018
    Date of Patent: February 16, 2021
    Assignee: Kemira Oyj
    Inventors: Toni Aaltonen, Oili Kallatsa, Jaakko Simell, Nina Sneitz, Jonas Konn, Jaakko Hiltunen, Ari Koskinen
  • A Method and a System for Providing at Least One Input Parameter of Sludge Dewatering Process of a Wastewater Treatment Plant
    Publication number: 20210039976
    Abstract: The invention relates to a method for providing at least one input parameter of a sludge dewatering process of a wastewater treatment plant. The method comprises: obtaining data representing process and/or plant configuration data of said wastewater treatment plant; feeding at least part of the obtained data to at least one model formed at least by historical process and plant configuration data gathered from a plurality of wastewater treatment plants combined with properties of applied chemicals in said wastewater treatment plants; and predicting at least one input parameter and/or at least one output parameter of the sludge dewatering process by means of the at least one model for adjusting sludge dewatering process of said wastewater treatment plant. The invention relates also to a computing unit for performing at least partly the method.
    Type: Application
    Filed: January 31, 2019
    Publication date: February 11, 2021
    Applicant: Kemira Oyj
    Inventors: Samantha Kiljunen, Tatjana KARPOVA, Hannele HAVANSI, Michael RECKTENWALD
  • Method for determining a scale inhibitor concentration in a sample
    Patent number: 10914679
    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: Grant
    Filed: March 21, 2018
    Date of Patent: February 9, 2021
    Assignee: Kemira Oyj
    Inventors: Vesa Nuutinen, Susanna Toivonen, James Johnstone, Harri Härmä, Paul Mundill
  • Biocide formulation and method for treating water
    Patent number: 10912296
    Abstract: The present invention provides a biocide formulation comprising a biocide in a micelle, wherein the micelle comprises a block copolymer having a biocide-solubilizing part and a water-soluble part, and a quaternary ammonium stabilizing compound. The present invention also provides a method for controlling microorganisms by eliminating and/or preventing biofilm formation in an aqueous environment.
    Type: Grant
    Filed: March 25, 2014
    Date of Patent: February 9, 2021
    Assignee: Kemira Oyj
    Inventors: Marko Kolari, Jukka Rautiainen, Hans-Peter Hentze, Hanna-Leena Alakomi, Pirkko Forssell
  • Paper strength improving polymer composition and additive system, use thereof, and manufacture of paper products
    Patent number: 10914038
    Abstract: A polymer composition including an anionic synthetic polymer, an anionic polysaccharide, including a strength additive system, a paper product and a method of production.
    Type: Grant
    Filed: May 14, 2018
    Date of Patent: February 9, 2021
    Assignee: KEMIRA OYJ
    Inventors: Chen Lu, Jenna Rabideau
  • Cationic surface sizing agent
    Patent number: 10907307
    Abstract: Provided herein is an aqueous polymer dispersion (A) obtainable by free radical emulsion copolymerizing a first ethylenically unsaturated monomer blend having 15 to 100% by weight of at least one C1-C4-alkyl (meth)acrylate, in the presence of a water-soluble redox system having a first free radical initiator for free radical emulsion copolymerization and an aqueous prepolymer composition (B) obtainable by free radical emulsion copolymerizing in a polymerization solvent having C1-6-carboxylic acid and C1-6-carboxylic acid anhydride a second ethylenically unsaturated monomer blend with 5 to 50% by weight of at least one ethylenically unsaturated quaternary amine, and 10 to 95% by weight of at least one optionally substituted styrene, in the presence of a second free radical initiator.
    Type: Grant
    Filed: December 28, 2016
    Date of Patent: February 2, 2021
    Assignee: KEMIRA OYJ
    Inventors: Anneli Lepo, Elsi Turunen, Tarja Turkki
  • Emulsions, treatment fluids and methods for treating subterranean formations
    Patent number: 10899955
    Abstract: Emulsions, treatment fluids and methods for treating subterranean formations are provided, wherein the emulsions comprise water, a water-immiscible liquid, one or more polymers, one or more ethoxylated amine compounds and optionally, one or more organic or inorganic salts. The emulsions are particularly suitable for use in harsh brine conditions.
    Type: Grant
    Filed: December 22, 2015
    Date of Patent: January 26, 2021
    Assignee: Kemira OYJ
    Inventors: Paul Waterman, Logan Jackson, Danny Nguyen, Ronald Robinson
  • Method for manufacturing a multi-layered paperboard, multi-layered paperboard and composition for use in multi-layered paperboard manufacturing
    Publication number: 20210002830
    Abstract: A method for manufacturing a multi-layered paperboard is disclosed, which includes at least two fibrous layers, in which method at least one layer of the multi-layered paperboard is treated by applying an aqueous solution of a first strength component in dissolved form including anionic strength polymer and/or amphoteric strength polymer composition on a surface of layer, and an aqueous solution of a cationic second strength component in dissolved form is added to a fibre stock from which at least one of the fibrous layers joined together is formed.
    Type: Application
    Filed: January 18, 2019
    Publication date: January 7, 2021
    Applicant: Kemira Oyj
    Inventor: Matti Hietaniemi
  • Method for manufacture of paper or board and paper or board obtained by the method
    Publication number: 20210002827
    Abstract: A method for manufacture of paper or board, in which method an inverted solution of cationic polymer is added to the fiber suspension for providing retention enhancement without over-flocculating fiber stock and destruction sheet formation and/or improving drainage and enhancing or at least maintaining strength of paper or board, An inverted solution has a bulk viscosity of 50-150 mPas at 0.2 weight-% cationic polymer concentration and inverted solution comprises cationic polymer obtained by reverse phase emulsion polymerization of a monomer blend comprising non-ionic monomers, 15-50 mol-% cationic monomers, an optionally at most 50 ppm of a crosslinking agent, and a chain transfer agent, and the obtained reverse phase emulsion of cationic polymer is inverted into an aqueous solution.
    Type: Application
    Filed: June 30, 2020
    Publication date: January 7, 2021
    Applicant: Kemira Oyj
    Inventors: Yuping Luo, Jennifer Riser, Zheng Dang, Junhua Chen, Ronald Robinson, Andrew Pencek, Barbara Lukasik