Patents Assigned to Kemira Oyj
  • Method and device for monitoring and controlling the state of a process stream
    Publication number: 20140343872
    Abstract: The present invention concerns a method of estimating and optionally controlling the microbiological state in a process stream of an industrial process by measuring the concentration of dissolved oxygen or the rH value, or both, in said stream, the method including continuous or periodic sampling and online measurement. The invention also concerns a device suitable for use in implementing said method.
    Type: Application
    Filed: November 30, 2012
    Publication date: November 20, 2014
    Applicant: Kemira Oyj
    Inventors: Pekka Ilmola, Kaj Jansson, Iiris Joensuu, Marjatta Piironen
  • Anionic dispersion polymerization process
    Patent number: 8877864
    Abstract: The invention provides an anionic dispersion polymerization process, wherein the polymerization is improved by an organic isothiocyanate, such as methyl isothiocyanate.
    Type: Grant
    Filed: October 14, 2011
    Date of Patent: November 4, 2014
    Assignee: Kemira Oyj
    Inventors: Rosa Carceller, Ari Juppo
  • Biocidal Systems and Methods of Use
    Publication number: 20140303045
    Abstract: Systems and methods for controlling microbial growth and/or activity in a gas field fluid or oil field fluid are provided, comprising: a) adding a first biocide component to the gas field fluid or oil field fluid in an amount effective to control microbial growth and/or activity; and b) after a delay, adding a second biocide component to the gas field fluid or oil field fluid.
    Type: Application
    Filed: April 4, 2014
    Publication date: October 9, 2014
    Applicant: Kemira Oyj
    Inventors: Scott Campbell, Angela Marie Johnson
  • DEVICE AND METHOD FOR CHARACTERIZING SOLID MATTER PRESENT IN LIQUIDS
    Publication number: 20140293040
    Abstract: The present invention relates to a device, system and method to measure tackiness of a substance, such as pulp, with an on-line or an in-line sensor having a transparent plate with a surface where tacky particles can attach. Attached particles are identified by a camera behind the plate. The camera is focused to detect stationary particles attached to the surface. Measurement is performed directly from a process stream or from a sidesteam and the plate does not need to be removed from the process for the measurement. The plate material may be plastic, such as polycarbonate or acrylic. Additionally, the flow speed may be kept be low, e.g. <0.1 m/s at the measurement position, and/or there may be a stagnation point of flow at or near measurement where the flow speed approaches zero.
    Type: Application
    Filed: September 3, 2012
    Publication date: October 2, 2014
    Applicant: KEMIRA OYJ
    Inventor: Matti Hietaniemi
  • Process for the preparation of peroxy acids
    Patent number: 8828910
    Abstract: The present invention relates to a process for the preparation of a solution comprising a first peroxy acid comprising performic acid and a second peroxy acid, said process comprising forming a carboxylic acid solution comprising a first carboxylic acid comprising formic acid, a second carboxylic acid and hydrogen peroxide, wherein the amount of formic acid is from 0.5 to 20% by weight of the amount of the second carboxylic acid, and allowing the components to react to form a solution comprising performic acid and said second peroxy acid, the amount of peroxy acids being at least 5% by weight. The invention also relates to a storable solution comprising performic acid and said second peroxy acid. The solution can be used as a disinfecting agent for controlling micro-organisms.
    Type: Grant
    Filed: September 13, 2006
    Date of Patent: September 9, 2014
    Assignee: Kemira Oyj
    Inventors: Reijo Aksela, Ilkka Renvall
  • Method for improving rheological properties of an aqueous pigment slurry and a dispersion agent
    Patent number: 8785550
    Abstract: The invention relates to a method for improving rheological properties of an aqueous pigment slurry. In the method dispersion agent is added to an aqueous phase of a slurry comprising pigment particles or to the aqueous phase into which the pigment particles are to be added. The dispersion agent comprises styrene acrylate copolymer. The invention also relates to a dispersion agent for a pigment slurry comprising a first component comprising styrene acrylate copolymer and a second component comprising a conventional dispersion agent, such as a straight-chain polyacrylate.
    Type: Grant
    Filed: June 29, 2009
    Date of Patent: July 22, 2014
    Assignee: Kemira Oyj
    Inventors: Esko Aarni, Perttu Heiska, Kimmo Huhtala
  • Process for production of paper
    Patent number: 8784611
    Abstract: The invention relates to a process for the production of paper or board comprising: adding a retention system to a stream of stock entering a paper machine head box, directing the stream of stock to a wire, de watering the stream of stock on the wire to form a paper web, and drying the paper web, wherein the retention system comprises a water-soluble cationic polymer, and nanocellulose acting like a micro particle, wherein the nanocellulose is added in an amount of less than 1% as active substance based on dry solids weight of the stock.
    Type: Grant
    Filed: November 3, 2010
    Date of Patent: July 22, 2014
    Assignee: Kemira OYJ
    Inventors: Ari Juppo, Ulf Stenbacka
  • Polyamine polyamidoamine epihaloohydrin compositions and processes for preparing and using the same
    Patent number: 8742030
    Abstract: Compositions of and processes for preparing a polyamine-polyamidoamine-epihalohydrin resin generally include reacting a first polyamine, a polyamidoamine, and an epihalohydrin to form the polyamine-polyamidoamine-epihalohydrin (PPAE) resin, wherein the polyamidoamine is prepared by reacting a polycarboxylic acid or a polycarboxylic acid derivative with a second polyamine to form the polyamidoamine, wherein a molar ratio of the polyamine to the polycarboxylic acid is 1.05 to 2.0. The PPAE resin can be used in an adhesive formulation for use in creping applications for forming paper products such as tissue products.
    Type: Grant
    Filed: March 4, 2013
    Date of Patent: June 3, 2014
    Assignee: Kemira Oyj
    Inventors: Chen Lu, Vladimir Grigoriev, Danny Nguyen, Scott Rosencrance
  • Azo dyes
    Patent number: 8734532
    Abstract: The present invention relates to new azo dyes, a process for their preparation, and their use for dyeing or printing fibrous materials, to produce materials with brownish shades.
    Type: Grant
    Filed: November 29, 2011
    Date of Patent: May 27, 2014
    Assignee: Kemira Oyj
    Inventors: Helmut-Martin Meier, Christof Heide, Klaus-Günter Strumpf, Thomas Hübbe
  • Azo dyes
    Patent number: 8734534
    Abstract: The present invention relates to new azo dyes, a process for their preparation, and their use for dyeing or printing fibrous materials, to produce materials with brownish shades.
    Type: Grant
    Filed: November 29, 2011
    Date of Patent: May 27, 2014
    Assignee: Kemira Oyj
    Inventors: Helmut-Martin Meier, Christof Heide, Klaus-Günter Strumpf, Thomas Hübbe
  • Polymeric compositions and their production and uses
    Patent number: 8697790
    Abstract: A composition includes a dispersion, having an aqueous phase containing a dissolved water soluble cationic coagulant polymer and if needed a dissolved inorganic salt. The aqueous phase further contains a dispersed water soluble flocculant polymer, wherein the water soluble flocculant polymer is formed of a water soluble ethylenically unsaturated monomer or monomer blend which are polymerized in the aqueous phase. The water soluble cationic coagulant polymer is cationic poly(alkyleneamine), which is the reaction product of the following reaction: H2N—(CH2)m—NR—(CH2)m—NH2+Cl—CH2CH2—Cl, wherein R is selected from the group consisting alkyl radicals containing from 1 to 4 carbon atoms m is an integer of from 1 to 4. The amount of dissolved inorganic salt is less than 10% by weight of the composition, and the composition is in a stable, pourable, dispersion form.
    Type: Grant
    Filed: August 8, 2012
    Date of Patent: April 15, 2014
    Assignee: Kemira Oyj
    Inventors: Marco Polverari, Anneli Lepo, Michael O'Toole
  • Defoaming Compositions
    Publication number: 20140090845
    Abstract: Cement compositions and processes for reducing air entrainment in a cement composition generally include mixing a hydraulic cement with a defoamer compositions including one or more organic acid ester polymers selected from an organic acid ester of polyethylene oxide polymer, an organic acid ester of polypropylene oxide polymer, and a mixture thereof. The compositions may further comprise an organic acid ester of an ethylene oxide-propylene oxide block copolymer.
    Type: Application
    Filed: September 28, 2012
    Publication date: April 3, 2014
    Applicant: KEMIRA OYJ
    Inventors: Amir H. Mahmoudkhani, Bava Luciana, Robert E. Wilson
  • Environmentally friendly tanning composition
    Patent number: 8685111
    Abstract: An embodiment of the present disclosure relates to a composition suitable for leather tanning comprising zeolite treated with monocarboxylic acid and to a method for manufacturing said composition. An embodiment of the present disclosure method comprises providing zeolite into a reactor and keeping said zeolite in motion while introducing concentrated monocarboxylic acid thereto provided that the mean temperature of the resulting composition is 50° C. or below.
    Type: Grant
    Filed: September 27, 2012
    Date of Patent: April 1, 2014
    Assignee: Kemira Oyj
    Inventors: Cuneyit Bagiran, Dominicus Brendler, Frank Wegener
  • Degrading agent compositions for temporary wet strength systems in tissue products
    Patent number: 8673117
    Abstract: A degrading agent composition for use in manufacturing a tissue product generally includes a degrading agent, a degradation inhibiting carrier, and a non-ionic surfactant. The non-ionic surfactant stabilizes the viscosity of the composition as a function of time. The degrading agent composition can be used in combination with a temporary wet strength agent to produce a tissue product exhibiting high initial wet tensile strength and desirable decay properties. Processes for forming the tissue product and pumpable fluids containing the degrading agent composition are also disclosed.
    Type: Grant
    Filed: September 30, 2010
    Date of Patent: March 18, 2014
    Assignee: Kemira Oyj
    Inventors: Scott Rosencrance, Yuping Luo, Vladimir Grigoriev
  • Deinking process
    Patent number: 8617353
    Abstract: The present invention provides a process for deinking printed waste paper comprising the steps of: a) converting the printed waste paper to an aqueous pulp slurry in a pulper, where ink is detached from paper pulp; b) subjecting the pulp slurry to flotation in order to remove hydrophobic contaminants including ink from the pulp slurry, said flotation being carried out in the presence of a deinking chemical additive comprising modified silica obtained by treating hydrophilic silica particles with a hydrophobic organic liquid or modified metal silicate obtained by treating hydrophilic metal silicate particles with a hydrophobic organic liquid or a mixture of such modified silica and modified metal silicate. The present invention increases the yield of the flotation step without affecting the brightness of the flotation accept.
    Type: Grant
    Filed: June 17, 2009
    Date of Patent: December 31, 2013
    Assignee: Kemira Oyj
    Inventors: Jean-Francois D'Allest, Tiina Sarja, Scott Rosencrance
  • METHODS OF MEASURING A CHARACTERISTIC OF A CREPING ADHESIVE FILM AND METHODS OF MODIFYING THE CREPING ADHESIVE FILM
    Publication number: 20130245158
    Abstract: Described herein are quartz crystal microbalance (QCM) and quartz crystal microbalance with dissipation (QCMD) techniques that can be used for measuring characteristics of a creping adhesive film similar to the creping adhesive film that is formed on a Yankee dryer during the tissue and towel manufacturing process. In addition, exemplary embodiments described herein may use these techniques to predict performance of creping aids utilized to form a creping adhesive film.
    Type: Application
    Filed: March 14, 2013
    Publication date: September 19, 2013
    Applicant: KEMIRA OYJ
    Inventors: Vladimir Grigoriev, Danny Nguyen, Scott Rosencrance, Chen Tampa Lu
  • Process for recovery of formic acid
    Patent number: 8530695
    Abstract: The invention relates to a process for the recovery of concentrated high purity formic acid having a concentration of at least 50%, most preferably at least 95%, from biomass wherein an aqueous liquid mixture containing levulinic acid and possibly furfural is subjected to a liquid-liquid extraction step, followed by the recovery of furfural, formic acid and levulinic acid.
    Type: Grant
    Filed: April 21, 2009
    Date of Patent: September 10, 2013
    Assignee: Kemira Oyj
    Inventors: Jarmo Reunanen, Pekka Oinas, Timo Nissinen
  • METHOD AND SYSTEM FOR MONITORING PROPERTIES OF AN AQUEOUS STREAM
    Publication number: 20130220922
    Abstract: The invention concerns an online method and system for monitoring properties of an aqueous stream of an industrial process. The method comprises providing an initial aqueous stream originating from said process, the aqueous stream containing solid matter exhibiting a first settling behavior; adding modifying agent to the initial aqueous stream at an addition rate sufficient to provide a modified aqueous stream containing solid matter exhibiting a second settling behavior different from the first settling behavior; conducting a sample of the initial aqueous stream or modified aqueous stream, any combination stream comprising the modified aqueous stream or any substream of the modified aqueous stream batchwise from a sampling point to a settling vessel having a volume; and measuring the settling behavior of the solid matter in the sample locally in the settling vessel as a function of time.
    Type: Application
    Filed: July 19, 2011
    Publication date: August 29, 2013
    Applicant: KEMIRA OYJ
    Inventors: Iiris Joensuu, Marjatta Piironen, Eija Saari, Jukka-Pekka Sirviö, Seppo Tuomivaara
  • Method of Controlling Addition Rate of an Odor Control Chemical
    Publication number: 20130220939
    Abstract: The invention concerns a method of controlling addition rate of an odor control chemical to a wastewater line comprising means for adding odor control chemical to the wastewater. The method comprises measuring a level of dissolved sulfides in the wastewater line using a sulfide probe placed in said wastewater line, transferring data on the level of dissolved sulfides to a computing unit, determining a required odor control chemical addition rate in said computing unit based on said level of dissolved sulfides, and instructing the means for adding odor control chemical to add the odor control chemical at said required addition rate. The invention allows for accurate on-line control of the level of H2S in the wastewater line.
    Type: Application
    Filed: February 1, 2013
    Publication date: August 29, 2013
    Applicant: KEMIRA OYJ
    Inventor: KEMIRA OYJ
  • Polyamine Polyamidoamine Epihaloohydrin Compositions and Processes for Preparing and Using the Same
    Publication number: 20130213593
    Abstract: Compositions of and processes for preparing a polyamine-polyamidoamine-epihalohydrin resin generally include reacting a first polyamine, a polyamidoamine, and an epihalohydrin to form the polyamine-polyamidoamine-epihalohydrin (PPAE) resin, wherein the polyamidoamine is prepared by reacting a polycarboxylic acid or a polycarboxylic acid derivative with a second polyamine to form the polyamidoamine, wherein a molar ratio of the polyamine to the polycarboxylic acid is 1.05 to 2.0. The PPAE resin can be used in an adhesive formulation for use in creping applications for forming paper products such as tissue products.
    Type: Application
    Filed: March 4, 2013
    Publication date: August 22, 2013
    Applicant: KEMIRA OYJ
    Inventor: KEMIRA OYJ