Patents Assigned to Kemira Oyj
  • COMPOSITION, ITS USE AND METHOD FOR REMOVING AND PREVENTING WET STRENGTH RESINS FROM CONTAMINATING PAPERMAKING EQUIPMENT
    Publication number: 20190002804
    Abstract: Compositions and methods for cleaning wet strength resin contamination from papermaking equipment and/or for preventing wet strength resins from contaminating papermaking equipment using the compositions are disclosed. The compositions comprise an aqueous solution of a weak organic acid; a surfactant, preferably a nonionic surfactant, a divalent metal ion containing catalyst and optionally a glycol ether containing solvent.
    Type: Application
    Filed: June 26, 2018
    Publication date: January 3, 2019
    Applicant: Kemira Oyj
    Inventors: Yong Zou, Yuping Luo, Anna Casasús
  • Method for nitrogen removal from aqueous medium
    Patent number: 10167215
    Abstract: The invention relates to a method for nitrogen removal from aqueous medium, comprising steps of (a) converting NH4+ in the aqueous medium to NO2? by partial aerobic nitrification, (b) partially reducing the obtained NO2? to N2O in anoxic conditions, and (c) decomposing N2O to N2 with energy recovery. A mixture of ferrous sulfate and ferric sulfate is used in step (b) for reduction of NO2? to N2O.
    Type: Grant
    Filed: September 3, 2015
    Date of Patent: January 1, 2019
    Assignee: Kemira Oyj
    Inventor: Roderick Abinet
  • MICROBIAL FUEL CELL AND ITS USE
    Publication number: 20180366756
    Abstract: The invention relates to a microbial fuel cell, which comprises a cell reactor, a cathode arranged on a cathode side of the cell reactor, and an anode arranged on an anode side of the cell reactor. The cathode and anode are connected with each other through an external circuit. Further the cell reactor comprises a proton permeable membrane, which is arranged between the anode and cathode, and which divides the cell reactor into the anode side and the cathode side. The membrane comprises a membrane core having a pore size of ?10 nm and/or divalent rejection ?50% and a hydrophilic polymeric surface layer on at least one side of the membrane core and attached permanently to the membrane core. The invention relates also to the use of the microbial fuel cell.
    Type: Application
    Filed: December 16, 2016
    Publication date: December 20, 2018
    Applicant: Kemira Oyj
    Inventors: Mehrdad Hesampour, Hannele Havansi, Sakari Halttunen, Jussi Ruotsalainen, Adina Anghelescu-Hakala, Jani Pelto
  • Detection and quantification of polymeric analytes using fluorescent lanthanide detection not relying on charge transfer from polymer aromatic groups
    Patent number: 10156558
    Abstract: A method for determining samples including one or more organic polymers by mixing them with lanthanide(III) ions and detecting the signal of the lanthanide(III) ion chelated with the organic polymer.
    Type: Grant
    Filed: September 24, 2014
    Date of Patent: December 18, 2018
    Assignee: KEMIRA OYJ
    Inventor: Harri Harma
  • WATER-BASED BARRIER COATINGS
    Publication number: 20180355204
    Abstract: A water-based barrier coating composition suitable for use as a barrier coating is disclosed which includes an aqueous polymer composition obtainable by free radical (co)polymerizing an ethylenically unsaturated monomer blend having an optionally substituted styrene, at least one C1-C4-alkyl (meth)acrylate, other ethylenically unsaturated copolymerizable monomers, degraded starch polyvinyl alcohol (PVA), a plasticizer; a composition having C16-C18 alkenyl ketene dimer, optionally as a mixture with rosin, of a gelling agent; and optionally a filler.
    Type: Application
    Filed: December 28, 2016
    Publication date: December 13, 2018
    Applicant: KEMIRA OYJ
    Inventors: Tarja Turkki, Sai Li, Jonni Ahlgren
  • Method and system for analyzing solid matter containing liquids and monitoring or controlling processes containing such liquids
    Patent number: 10139330
    Abstract: The invention concerns a method and system for analyzing a liquid sample containing solid matter. The method comprises fractionating the sample according to particle sizes and/or masses of the solid matter so as to produce sample fractions, and measuring at least one physical or chemical property of at least one of said sample fractions. According to the invention the sample is conducted to a disintegration channel having one or more depressions, and a liquid flow having a non-constant temporal velocity profile is applied through the disintegration channel, in order to gradually take solid matter of the sample with the liquid flow from said one or more depressions for providing said sample fractions. The invention allows for efficient fractionation of samples, which cannot be fractionated using conventional field flow fractionation, for example.
    Type: Grant
    Filed: May 24, 2013
    Date of Patent: November 27, 2018
    Assignee: KEMIRA OYJ
    Inventors: Lari Vähäsalo, Eija Saari, Iiris Joensuu, Marjatta Piironen
  • Bacterial strain VKM Ac-2610D producing nitrile hydratase, method of its cultivation and method for producing acrylamide
    Patent number: 10138459
    Abstract: The invention relates to a bacterial strain belonging to the genus Rhodococcus which is a producer of a nitrile hydratase. The invention also relates to a method for producing acrylamide by hydration of acrylonitrile using a biomass of the bacterial strain and to a method of culturing the bacterial strain.
    Type: Grant
    Filed: October 28, 2016
    Date of Patent: November 27, 2018
    Assignee: Kemira Oyj
    Inventors: Sergey Vladimirovich Kozulin, Tatiana Nicolaevna Kozulina, Alexey Sergeevich Kozulin
  • Stabilized sizing formulation
    Patent number: 10132037
    Abstract: The present invention relates to sizing agent formulations, especially to stabilizing a sizing formulation by a modified non-food polysaccharide. The method for preparation of the modified non-food polysaccharide is further provided.
    Type: Grant
    Filed: February 6, 2015
    Date of Patent: November 20, 2018
    Assignee: Kemira Oyj
    Inventors: Reetta Strengell, Juha Lindfors, Sari Hyvärinen, Sauli Vuoti
  • Stabilized sizing formulation
    Patent number: 10132038
    Abstract: The present invention is related to sizing agent formulations, especially to stabilizing a sizing formulation by a modified non-food polysaccharide. The method for preparation of the modified non-food polysaccharide is further provided.
    Type: Grant
    Filed: February 6, 2015
    Date of Patent: November 20, 2018
    Assignee: Kemira Oyj
    Inventors: Reetta Strengell, Juha Lindfors, Sari Hyvärinen, Sauli Vuoti
  • Process for making paper, paperboard or the like
    Publication number: 20180327974
    Abstract: The present disclosure provides an improved process for making paper or paper board. 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: Application
    Filed: September 30, 2016
    Publication date: November 15, 2018
    Applicant: Kemira Oyj
    Inventors: Christopher Michael Lewis, William James Garrisi
  • Process additive formulation and method for foam reduction and/or for increasing drainage
    Patent number: 10124277
    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: Grant
    Filed: November 18, 2014
    Date of Patent: November 13, 2018
    Assignee: Kemira Oyj
    Inventors: Fredrick Vance, Robert Wilson
  • Method for optimising material recovery in a chemical pulping process
    Publication number: 20180319682
    Abstract: The invention relates to a method for optimising material recovery in a chemical pulping process. The method comprises treating of cellulosic raw material with cooking chemicals in a cooking step, where lignin is at least partly dissolved into cooking liquid phase and separated from fibres. The lignin is separated from the cooking liquid phase. The separated lignin is used for formation of a treatment composition comprising at the most 1 weight-% of aluminium. A bleaching liquid phase is treated with the treatment composition in order to remove organic humic substances from the bleaching liquid. Organic sludge is formed and it is used for energy production in a chemical recovery step.
    Type: Application
    Filed: November 4, 2016
    Publication date: November 8, 2018
    Applicant: Kemira Oyj
    Inventors: Jonni Ahlgren, Sakari Halttunen, Jussi Ruotsalainen, Kari Saari
  • Method for producing dewatered microfibrillated cellulose
    Patent number: 10113005
    Abstract: The present invention relates to a method for producing dewatered microfibrillated cellulose (MFC) comprising i) providing an aqueous MFC slurry, ii) optionally dewatering said MFC slurry by mechanical means to provide a partly dewatered MFC slurry, and iii) subjecting the MFC slurry or the partly dewatered MFC slurry to one or more drying operations by means of one or more absorbing materials to produce dewatered MFC. The produced MFC can be redispersed in water without deteriorating the material properties of the MFC.
    Type: Grant
    Filed: December 19, 2013
    Date of Patent: October 30, 2018
    Assignee: Kemira Oyj
    Inventors: Martin Häggblom, Veli-Matti Vuorenpalo
  • Method for controlling the operation of a microbial fuel cell arrangement and microbial fuel cell arrangement
    Publication number: 20180301729
    Abstract: The invention relates to a method for controlling operation of a microbial fuel cell arrangement having at least one microbial fuel cell unit. The unit comprises an anode and a cathode, which are connected with each other via an external electrical circuit. In the method an influent flow of liquid medium, which comprises organic substance(s), is fed to the microbial fuel cell unit, and at least a part of the organic substance(s) are converted into electrical energy in the microbial fuel cell unit by using microorganisms. Potential of the anode is measured against a reference electrode and obtaining measurement value(s), and the measured value(s) are used for controlling the feed of the influent flow to the microbial fuel cell unit. An effluent flow of treated liquid medium is removed from the microbial fuel cell unit.
    Type: Application
    Filed: October 7, 2016
    Publication date: October 18, 2018
    Applicant: Kemira Oyj
    Inventor: Hannele Havansi
  • Method for separating hydrocarbons and use of molten salt
    Patent number: 10093862
    Abstract: The invention relates to a use of a reversible molten salt for separating hydrocarbons, such as crude bitumen and/or heavy crude oil, from material comprising mineral solids. The invention relates also to a method comprising at least the steps of: (a) bringing a liquid phase comprising a reversible molten salt, preferably a reversible ionic liquid, in a contact with mineral solids comprising hydrocarbons and extracting hydrocarbons to the liquid phase from the mineral solids; (b) separating the mineral solids phase from the liquid phase, which comprises molten salt and hydrocarbons; (c) separating hydrocarbons from the liquid phase comprising molten salt; and (d) recycling the liquid phase comprising molten salt to step (a).
    Type: Grant
    Filed: June 17, 2015
    Date of Patent: October 9, 2018
    Assignee: Kemira Oyj
    Inventors: Lasse Kyllönen, Alistair King, Samantha Kiljunen, Mehrdad Hesampour
  • Method for determining a scale inhibitor concentration in a sample
    Publication number: 20180284022
    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: March 21, 2018
    Publication date: October 4, 2018
    Applicant: Kemira Oyj
    Inventors: Vesa Nuutinen, Susanna Toivonen, James Johnstone, Harri Härmä, Paul Mundill
  • Depressants for mineral ore flotation
    Patent number: 10081021
    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: August 12, 2016
    Date of Patent: September 25, 2018
    Assignee: Kemira Oyj
    Inventors: Marcelo Moreira Da Costa, Jorge Eduardo Langsch, Paulo Henrique Morais, Lucas Moore
  • Gel compositions for hydraulic fracturing applications
    Patent number: 10081754
    Abstract: Gel compositions comprising an acrylamide polymer or copolymer crosslinked with dialdehyde, methods to produce the gel compositions, wellbore treatment fluids comprising the gel compositions, and methods of treating a well bore comprising injecting the gel compositions, are provided. In the drilling, completion, and stimulation of oil and gas wells, well treatment fluids are often pumped into well bore holes under high pressure and at high flow rates causing the rock formation surrounding the well bore to fracture.
    Type: Grant
    Filed: February 28, 2014
    Date of Patent: September 25, 2018
    Assignee: Kemira Oyj
    Inventors: Jiang Li, Roopa Tellakula
  • Method for preparing a dry cationic hydrogel polymer product, polymer product and its use
    Patent number: 10081689
    Abstract: The invention relates to a method for preparing a dry cationic hydrogel polymer product. The method comprises polymerization of a reaction mixture comprising ethylenically unsaturated monomers in presence of water and initiator(s) by radical polymerization and obtaining a hydrogel polymer. The hydrogel polymer is comminuted by chopping or shredding, and dried, whereby a dry hydrogel polymer product in powder form is obtained. At least one cationic reverse phase emulsion polymer is added to the hydro polymer at the comminuting step. The invention relates also to a dry cationic hydrogel polymer composition prepared by the method and its use.
    Type: Grant
    Filed: November 17, 2015
    Date of Patent: September 25, 2018
    Assignee: Kemira Oyj
    Inventors: Ronald Van Rossum, Susanna Holappa, Lasse Kyllönen
  • Functionalized magnetic nanoparticles and a method for preparation thereof
    Publication number: 20180268972
    Abstract: The present disclosure relates to a method for manufacturing a covalently functionalized coated magnetic nanoparticle and to said particles and uses thereof. The preparation method includes forming a shell of a hydrophilic polymer coating layer on top of a magnetic metal core coated with a carbon coating. In the method a particle comprising a magnetic metal core coated with a carbon coating is provided. The surface of the particle is subjected to covalent functionalization by generating amino reactive groups via diazonium chemistry and subsequently an irreversible attachment of an atom transfer radical polymerization (ATRP) initiator is carried out on said surface. A hydrophilic polymer layer is formed) by a surface initiated atom transfer radical polymerization (SI-ATRP) reaction with a monomer comprising N-isopropylacrylamide (NIPAM).
    Type: Application
    Filed: September 21, 2016
    Publication date: September 20, 2018
    Applicant: Kemira Oyj
    Inventors: Mehrdad HESAMPOUR, Lasse KYLLÖNEN, Ari AUVINEN, Adina ANGHELESCU-HAKALA