Patents Assigned to Kemira Oyj
  • Publication number: 20240092668
    Abstract: In a water treatment system, a pretreatment chemical is added to water stream in a pretreatment process including a coagulation, flocculation and separation to reduce amount of dissolved and/or particulate matter in the water stream. Hydrophobic conditions in the water stream are monitored upstream or downstream from adding the pretreatment chemicals. Dosing of the pretreatment chemical to the water stream is controlled based on the monitored hydrophobic conditions. Thereby a membrane fouling in subsequent membrane filtration stage can be minimized.
    Type: Application
    Filed: December 4, 2023
    Publication date: March 21, 2024
    Applicant: KEMIRA OYJ
    Inventors: Mehrdad HESAMPOUR, Roderick ABINET, Marjatta PIIRONEN, Eija KORTE, Iiris JOENSUU
  • Patent number: 11932707
    Abstract: The present invention relates to a method and an arrangement for dissolving starch. Specifically, the present invention relates to a method for dissolving starch by introducing mechanical force to at least partially gelatinized aqueous starch.
    Type: Grant
    Filed: February 6, 2020
    Date of Patent: March 19, 2024
    Assignee: Kemira Oyj
    Inventors: Asko Karppi, Perttu Heiska, Mika Suvanto, Matti Hietaniemi
  • Patent number: 11925914
    Abstract: Systems for producing performic acid and methods for producing performic acid. The systems may include two or more reactor units, two or more servient programmable logic controllers, a control panel, and a master programmable logic controller. The system may modify the production of performic acid in at least one of the two or more reactor units upon and/or after the occurrence of a disruptive event in order to maintain a desired level of performic acid production and/or a desired level of disinfection.
    Type: Grant
    Filed: March 9, 2021
    Date of Patent: March 12, 2024
    Assignee: KEMIRA OYJ
    Inventors: Patricia Aubeuf-Prieur, Iris Porat, Marco Stammegna, Sampsa Greus
  • Patent number: 11897984
    Abstract: Tagging agents, including fluorescent monomers, which may be polymerized. Anti-scalant polymer compositions that include a copolymer of a tagging agent and an anti-scalant monomer. Methods for synthesizing tagging agents, anti-scalant polymer compositions, and detecting an anti-scalant polymer composition.
    Type: Grant
    Filed: December 4, 2020
    Date of Patent: February 13, 2024
    Assignee: KEMIRA OYJ
    Inventors: Vesa Nuutinen, Erkki Johannes Metsälä, Reijo Aksela, Vesa Vuori, Mehrdad Hesampour
  • Patent number: 11891499
    Abstract: The present invention relates to a granular microfibrillated cellulose product comprising a microfibrillated cellulose originating from agricultural biomass, said microfibrillated cellulose product comprising ?75 wt % of cellulose, preferably ?70 wt %, based on dry solids content of said product, wherein said granular microfibrillated cellulose product has a bulk density of 500-1200 kg/m3; a flowability of 5-60 ml/s, measured by a Copley scientific powder flowability tester having a stainless steel cylinder with orifice 16 or funnel with orifice 15; and a water content of at most 60 wt %, based on total microfibrillated cellulose product. The present invention further relates to its manufacture and use in and manufacture of paper and paperboard products.
    Type: Grant
    Filed: July 19, 2019
    Date of Patent: February 6, 2024
    Assignee: KEMIRA OYJ
    Inventors: Juhana Ahola, Kaisa Karisalmi, Christos Rampotas, Perttu Heiska, Mika Suvanto
  • Patent number: 11879061
    Abstract: Liquid polymer and inverse emulsion compositions comprising: one or more hydrophobic liquids having a boiling point at least about 100° C.; one or more acrylamide-(co)polymers; one or more emulsifier surfactants; one or more inverting surfactants; and one or more siloxane polyether compounds. When the composition is inverted in an aqueous solution, it provides an inverted solution having a filter ratio using a 1.2 micron filter (FR1.2) of about 1.5 or less.
    Type: Grant
    Filed: June 29, 2018
    Date of Patent: January 23, 2024
    Assignee: KEMIRA OYJ
    Inventors: Hong Yang, Frances Troy
  • Patent number: 11879095
    Abstract: The present embodiments generally relate to methods and compositions comprising one or more polymers which gradually increase in charge, thereby providing for an increase in viscosity in an aqueous solution or aqueous composition, such as when present in a desired aqueous environment. Use of such compositions and methods comprising one or more polymers which gradually increase in charge, thereby providing for an increase in viscosity in an aqueous solution or aqueous composition during enhanced oil recovery may result in an increase in oil production relative to methods and/or compositions which do not comprise one or more polymers which gradually increase in charge, thereby providing for an increase in viscosity in an aqueous solution or aqueous composition.
    Type: Grant
    Filed: September 17, 2019
    Date of Patent: January 23, 2024
    Assignee: KEMIRA OYJ
    Inventors: Leena Nurmi, Sirkku Hanski, Susanna Toivonen, Louis Rosati
  • Patent number: 11866356
    Abstract: In a water treatment system, a pretreatment chemical is added to water stream in a pretreatment process including a coagulation, flocculation and separation to reduce amount of dissolved and/or particulate matter in the water stream. Hydrophobic conditions in the water stream are monitored upstream or downstream from adding the pretreatment chemicals. Dosing of the pretreatment chemical to the water stream is controlled based on the monitored hydrophobic conditions. Thereby a membrane fouling in subsequent membrane filtration stage can be minimized.
    Type: Grant
    Filed: October 6, 2017
    Date of Patent: January 9, 2024
    Assignee: KEMIRA OYJ
    Inventors: Mehrdad Hesampour, Roderick Abinet, Marjatta Piironen, Eija Korte, Iiris Joensuu
  • Patent number: 11859128
    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, and an inverting surfactant composition comprising one or more surfactants selected from the group consisting of ethoxylated amine compounds, ethoxylated fatty acid compounds, and alkyl polyethyleneglycol ether carboxylic acid compounds, alkyl polyglycol ether carboxylic acid compounds, and salts or esters thereof. The emulsions are particularly suitable for use in brine.
    Type: Grant
    Filed: September 1, 2017
    Date of Patent: January 2, 2024
    Assignee: KEMIRA OYJ
    Inventor: Roopa Tellakula
  • Patent number: 11859347
    Abstract: A method is disclosed for predicting the microbial status of a paper or board making process and/or quality of the dry board or paper obtained from the process for controlling microbial status of a paper or board making process or quality of the dry board or paper obtained from the process. Surface level and duration of time in at least one storage tower or pulper are monitored and correlated with respective predetermined values for the tower or pulper in order to predict the risk of microbial activity.
    Type: Grant
    Filed: December 7, 2018
    Date of Patent: January 2, 2024
    Assignee: Kemira Oyj
    Inventors: Marko Kolari, Marjatta Piironen, Iiris Joensuu
  • Patent number: 11845899
    Abstract: The invention relates to method and composition for treating tailings from a separation process, where bitumen is separated from mineral solids. Tailings comprise an aqueous phase with suspended solid particulate material and residual bitumen and have a dry solids content <25 weight-%. The method comprises addition of a flocculating agent comprising polyacrylamide to the tailings, as well as addition of an auxiliary agent comprising ionic liquid to tailings in conjunction with the flocculating agent. Flocs, which comprise solid particulate material, are formed and the formed flocs are separated from the aqueous phase. The composition comprises a copolymer of (meth)acrylamide and an auxiliary agent comprising ionic liquid.
    Type: Grant
    Filed: April 1, 2021
    Date of Patent: December 19, 2023
    Assignee: KEMIRA OYJ
    Inventors: Thomas Fenderson, Lasse Kyllonen, Alistair King, Evangelos Sklavounos, Frances Fournier, Sukhjit Aujla
  • Patent number: 11846005
    Abstract: Binder compositions for agglomerating iron ore fines are provided, the compositions comprising: one or more types of modified starch and one or more types of synthetic dry polymers. A process for preparing iron ore pellets with the binder compositions is also provided, the process comprising: (i) adding a binder composition to particulate iron ore to form a mixture; and (ii) forming the mixture into pellets.
    Type: Grant
    Filed: November 10, 2015
    Date of Patent: December 19, 2023
    Assignee: Kemira Oyj
    Inventors: Yuping Luo, Lucas Moore, Patrick Macy
  • Patent number: 11840664
    Abstract: Methods and compositions comprising one or more degraded in situ gelable polymers are provided. Use of such compositions and methods comprising one or more degraded in situ gelable polymers during enhanced oil recovery may result in an increase in oil production relative to methods and/or compositions which do not comprise one or more degraded in situ gelable polymers.
    Type: Grant
    Filed: October 31, 2019
    Date of Patent: December 12, 2023
    Assignee: KEMIRA OYJ
    Inventors: Yuping Luo, Pengpeng Qi
  • Patent number: 11834355
    Abstract: The invention relates to a method and system for phosphate recovery from a stream such as waste flow, sewage or another sludge stream. The method comprises the steps of: providing an incoming stream comprising an initial amount of phosphate; dosing/controlling iron salt to the stream such that precipitates are formed in the stream, wherein the precipitates comprise vivianite like structures comprising more than 60% of the initial amount of phosphate in the incoming stream, and preferably also the steps of: separating the vivianite like structures from the stream; and recovering the phosphates from the separated vivianite like structures.
    Type: Grant
    Filed: March 14, 2018
    Date of Patent: December 5, 2023
    Assignee: Kemira Oyj
    Inventors: Philipp Karl Wilfert, Leendert Date Korving, Peter Carlo Rem, Geert-Jan Witkamp, Marinus Cornelis Maria Van Loosdrecht, Achim Lulian Dugulan, Kees Goubitz, Simon Peter Maria Berkhout
  • Patent number: 11834792
    Abstract: Methods for making paper with improved strength and methods for improving paper strength, using a metal chelate and an organic polymer, and improved strength paper made through these processes.
    Type: Grant
    Filed: April 1, 2020
    Date of Patent: December 5, 2023
    Assignee: Kemira OYJ
    Inventors: Clayton Campbell, Junhua Chen, Zheng Dang
  • Patent number: 11827541
    Abstract: The present embodiments generally relate to the treatment of produced water comprising one or more water soluble polymers, wherein such treatment comprises: adding to the produced water at least one iron complex; and degrading at least a portion of the one or more water soluble polymers. This treatment may result in a reduction of the viscosity of said produced water and/or the degradation of the water soluble polymers which are contained therein.
    Type: Grant
    Filed: May 5, 2022
    Date of Patent: November 28, 2023
    Assignee: KEMIRA OYJ
    Inventors: Iris Porat, Miguel Pelaez, Mehrdad Hesampour, Yuping Luo, William Morris, Luciana Bava
  • Patent number: 11802376
    Abstract: The present invention relates to a polymer composition comprising an anionic polymer composite having a synthesized polymer portion and a polysaccharide portion, obtainable by polymerizing vinyl monomers in the presence of the polysaccharide. The present invention further relates to a strength system and methods of production and use in providing a paper product.
    Type: Grant
    Filed: May 14, 2018
    Date of Patent: October 31, 2023
    Assignee: KEMIRA OYJ
    Inventors: Chen Lu, Jenna Rabideau
  • Patent number: 11788936
    Abstract: The invention relates to a method for treating a liquid sample, which comprises disturbing iron and at least one organic compound of interest. The, the method comprises addition of a reagent comprising an ammonium salt, alkali metal salt or earth alkali metal salt of hexacyanoferrate to the sample. Iron in the sample is allowed to interact with the reagent and to form a reaction product, the reaction product of iron is separated from the sample, and the amount of the at least one compound of interest is determined from the sample. The invention relates also to use of salt of hexacyanoferrate.
    Type: Grant
    Filed: February 17, 2017
    Date of Patent: October 17, 2023
    Assignee: Kemira Oyj
    Inventor: Tapio Honkanen
  • Patent number: 11781055
    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: January 5, 2021
    Date of Patent: October 10, 2023
    Assignee: KEMIRA OYJ
    Inventors: Paul Waterman, Logan Jackson, Danny Nguyen, Ronald Robinson
  • Publication number: 20230287629
    Abstract: A method for monitoring hydrophobic particles contained in a pulp suspension, includes obtaining a sample from a pulp suspension or a filtrate of the pulp suspension. A fluorescent dye is added to the sample to stain particles in the sample. The sample is fractionated to obtain at least a first fraction and a second fraction, wherein the second fraction is a fiber fraction. The method includes for the obtained fractions, fluorescence emitted by the particles in the fractions, calculating an integral of the fluorescence measured for the fractions excluding the fiber fraction, and correlating the calculated integral of the fluorescence to the amount of acetone soluble material in the pulp suspension, and optionally measuring light scattering signal of the particles in at least first and second fractions.
    Type: Application
    Filed: May 18, 2023
    Publication date: September 14, 2023
    Applicant: KEMIRA OYJ
    Inventors: Marjatta PIIRONEN, Iiris JOENSUU, Lari VÄHÄSALO