Patents Assigned to Kemira Oyj
  • Patent number: 8512521
    Abstract: The present invention relates to a paper sizing agent and emulsion comprising a maleated vegetable oil size wherein at least 50% by weight of the total fatty acids of the triglycerides are monounsaturated. The invention also relates to a process for the preparation of such maleated vegetable oil size.
    Type: Grant
    Filed: April 9, 2010
    Date of Patent: August 20, 2013
    Assignee: Kemira Oyj
    Inventors: Elisabeth Lackinger, Klaus Möller, Jürgen Sartori, Leo Schmid
  • Patent number: 8515581
    Abstract: The present invention relates to a method for automatic dose control of chemicals in liquid treatment, particularly for automatic dose control of chemicals in water treatment. The present invention also relates to a device arrangement for automatic dose control of chemicals. The invention utilizes adaptive linguistic equation controllers for dosing the chemicals.
    Type: Grant
    Filed: August 27, 2004
    Date of Patent: August 20, 2013
    Assignee: Kemira Oyj
    Inventors: Eila Piironen, Esko Juuso, Iiris Joensuu, Aki Sorsa
  • Publication number: 20130204035
    Abstract: The present invention relates to a process for the preparation of a mixture of aspartic acid diethoxy succinate and an amino acid derivative of the general formula (I) wherein n is 1-10, m is 0 or 1, and R is hydrogen or an alkali metal or alkaline earth metal ion, comprising reacting maleate with diethanol amine under alkaline conditions in the presence of a lanthanoid catalyst to form aspartic acid diethoxy succinate followed by adding aspartic acid which reacts with unreacted maleate to form imino disuccinic acid, i.e. an amino acid derivative of formula (I) wherein m is 0, or by adding a diamine derivative of the general formula (II) NH2(CH2)nNH2 wherein n is as defined above, which reacts with unreacted maleate to form an amino acid derivative of formula (I) wherein m is 1 and n is as defined above.
    Type: Application
    Filed: May 30, 2011
    Publication date: August 8, 2013
    Applicant: Kemira OYJ
    Inventors: Reijo Aksela, Jussi Rissanen
  • Patent number: 8492586
    Abstract: Processes for the recovery of formate salt from biomass and the product obtained thereof generally include subjecting an aqueous liquid mixture containing levulinic acid, formic acid and possibly furfural to a liquid-liquid extraction process, followed by the recovery of the furfural, the formate salt and the levulinic acid or the levulinate salt.
    Type: Grant
    Filed: April 21, 2009
    Date of Patent: July 23, 2013
    Assignee: Kemira Oyj
    Inventors: Jarmo Reunanen, Pekka Oinas, Timo Nissinen, Esko Tirronen
  • Publication number: 20130184407
    Abstract: The present disclosure relates to a method for controlling size distribution of formed polymer particles during preparation of aqueous polymer dispersion. The method comprises obtaining an aqueous polysaccharide solution, which comprises about 10 to 40 weight-% polysaccharide containing a free hydroxyl group, such as starch, and polymerising in the polysaccharide solution in the presence of a graft-linking, water-soluble redox system about 30 to 60 weight-% of at least one optionally substituted styrene, about 60 to 30 weight-% of at least one C1-C4-alkyl (meth)acrylate, and 0 to about 10 weight-% of other ethylenically unsaturated copolymerizable monomers. The size distribution of the formed polymer particles is controlled by adjusting viscosity of the polysaccharide solution before the polymerisation to a level less than about 20 mPas.
    Type: Application
    Filed: January 11, 2013
    Publication date: July 18, 2013
    Applicant: KEMIRA OYJ
    Inventor: Kemira Oyj
  • Publication number: 20130160959
    Abstract: Paper strength systems including polyamine-polyamidoamine-epihalohydrin (PPAE) resin are disclosed. Also disclosed are methods of forming a paper including applying a strength system comprising PPAE to cellulosic fiber, as well as the resultant paper.
    Type: Application
    Filed: December 22, 2011
    Publication date: June 27, 2013
    Applicant: KEMIRA OYJ
    Inventors: Scott Rosencrance, Vladimir Grigoriev, Chen Lu
  • Publication number: 20130164814
    Abstract: A method and use therein for inactivating hydrogen peroxide decomposing enzymes in the production of recycled fiber pulp and/or mechanical pulp comprising providing solid peroxygen to an aqueous process for fiber production.
    Type: Application
    Filed: May 27, 2011
    Publication date: June 27, 2013
    Applicant: KEMIRA OYJ
    Inventors: Tiina Sarja, Marko Kolari
  • Publication number: 20130153510
    Abstract: The invention relates to a method and system for treating an aqueous stream having a first flow rate and containing solid matter exhibiting first settling properties, the method comprising adding a modifying agent to the aqueous stream at an addition rate sufficient to change the first settling properties of the aqueous stream to obtain a modified aqueous stream having solid matter exhibiting second settling properties different from the first settling properties; taking batchwise samples of the modified aqueous stream to a settling vessel having a volume; determining a settling property of the solid matter of the samples in the settling vessel; and conducting the modified aqueous stream to a separation unit in which solid matter is separated from the modified aqueous stream. The invention provides a convenient way of monitoring and/or controlling aqueous streams conducted for example to purification processes.
    Type: Application
    Filed: July 19, 2011
    Publication date: June 20, 2013
    Applicant: KEMIRA OYJ
    Inventors: Kaj Jansson, Iiris Joensuu, Marjatta Piironen, Jukka-Pekka Sirviö, Tapio Yrjänäinen
  • Patent number: 8425724
    Abstract: The invention relates to a composition comprising (a) a functional promoter comprising a water-soluble anionic polymer having a molecular weight of at least about 50,000 daltons and a molecular weight charge index value of at least about 10,000; (b) a cationic surfactant component; such that when the composition treats a fibrous substrate, in conjunction with a cationic strength agent, the treated fibrous substrate exhibits (i) a ratio of wet tensile strength to dry tensile strength ranging from about 1:5 to about 1:2 and (ii) an increase in a ratio of wet tensile strength to dry tensile strength of at least about 10%, as compared to when the fibrous substrate is treated with the functional promoter and without a surfactant. The invention also relates to a paper product made with such a system, and method for imparting wet strength to a paper product with the functional promoter.
    Type: Grant
    Filed: October 18, 2011
    Date of Patent: April 23, 2013
    Assignee: Kemira Oyj
    Inventors: Michael Ryan, William Brevard
  • Publication number: 20130081211
    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: Application
    Filed: September 27, 2012
    Publication date: April 4, 2013
    Applicant: KEMIRA OYJ
    Inventor: Kemira Oyj
  • Publication number: 20130081771
    Abstract: Exemplary embodiments of the present disclosure include paper, methods of making paper, and the like.
    Type: Application
    Filed: September 26, 2012
    Publication date: April 4, 2013
    Applicant: Kemira Oyj
    Inventor: Kemira Oyj
  • Patent number: 8399106
    Abstract: According to the invention, wood material is treated with a composition comprising at least one C1-C7 monocarboxylic acid or a salt, or mixtures thereof, and at least one chelating agent. These compounds are dissolved in a liquid aqueous vehicle. In this manner, the treated wood is endowed with excellent resistance against detrimental environmental effects.
    Type: Grant
    Filed: December 3, 2008
    Date of Patent: March 19, 2013
    Assignee: Kemira OyJ
    Inventors: Jari-Jukka Kukkonen, Timo Nissinen, Aksela Reijo
  • Patent number: 8377304
    Abstract: The present invention relates to a method for treatment of sludge in water purification, the method comprising the steps: providing an enzyme mixture comprising at least one enzyme capable of digesting natural polymeric materials; and adding the enzyme mixture and at least one chelating reagent, in optional order or simultaneously, to an aqueous sludge suspension.
    Type: Grant
    Filed: May 30, 2008
    Date of Patent: February 19, 2013
    Assignee: Kemira Oyj
    Inventors: Estera Szwajcer Dey, Olof Norrlöw
  • Publication number: 20130037230
    Abstract: The present invention relates to a composition comprising 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 that 10% by weight of the composition, and the composition is in a stable, pourable, dispersion form.
    Type: Application
    Filed: August 8, 2012
    Publication date: February 14, 2013
    Applicant: KEMIRA OYJ
    Inventors: Marco POLVERARI, Anneli LEPO, Michael O'TOOLE
  • Publication number: 20120255698
    Abstract: A new process to make high solids polymer backbone with low molecular weight and narrow molecular weight distribution has been developed by a continuous polymerization processes under refluxing conditions. In this process, a mixture of acrylamide monomer, chain transfer agent and initiator is simultaneously and continuously added to the heel of aqueous solution under refluxing conditions.
    Type: Application
    Filed: January 31, 2012
    Publication date: October 11, 2012
    Applicant: KEMIRA OYJ
    Inventors: Naijie Zhang, Michael Ryan, Robert J. Proverb
  • Patent number: 8282778
    Abstract: The invention relates to a method for preventing or delaying bacterial sporulation in the broke system of a board or paper machine by lowering the content of transition metals in the broke to a level unfavorable for sporulation. Preferably bacterial cells present in the broke system of the board or paper machine are not substantially killed by the procedure used for lowering the content of the transition metals. The invention further relates to a method for producing packaging board or packaging paper having a low bacterial spore content.
    Type: Grant
    Filed: March 15, 2007
    Date of Patent: October 9, 2012
    Assignee: Kemira Oyj
    Inventor: Marko Kolari
  • Publication number: 20120247697
    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 29, 2011
    Publication date: October 4, 2012
    Applicant: KEMIRA OYJ
    Inventors: Chen Lu, Vladimir Grigoriev, Danny Nguyen, Scott Rosencrance
  • Patent number: 8278374
    Abstract: Embodiments of the present disclosure provide for processes for manufacture of a dry strength paper, methods for imparting dry strength to paper using a cationic starch graft polymer, and the like.
    Type: Grant
    Filed: February 18, 2011
    Date of Patent: October 2, 2012
    Assignee: Kemira Oyj
    Inventors: Bernd Hauschel, Bernd Thiele, Thomas Hubbe, Bernhard Jansen
  • Publication number: 20120244063
    Abstract: Disclosed is a process for the production of chlorine dioxide, by which sulphuric acid can be efficiently mixed into the reaction mixture. The process apparatus includes a reaction vessel (1) operating in reduced pressure, in which alkali metal chlorate is reduced in acidic conditions. The reaction vessel (1) is equipped with a recirculation line (2) of the reaction mixture, including a circulation pump (3) and, downstream after the pump, a heat exchanger (4). The process is characterized in that the sulphuric acid is fed into the recirculation line (2) before the circulation pump, or into the circulation pump (3).
    Type: Application
    Filed: October 29, 2010
    Publication date: September 27, 2012
    Applicant: KEMIRA OYJ
    Inventor: Seppo Pohjanvesi
  • Publication number: 20120220692
    Abstract: Cement compositions and processes for reducing air entrainment in a cement composition generally include mixing a hydraulic cement with a defoamer composition including an organic acid ester of a polyoxyethylene-polyoxypropylene block copolymer.
    Type: Application
    Filed: February 28, 2011
    Publication date: August 30, 2012
    Applicant: KEMIRA OYJ
    Inventors: Amir H. Mahmoudkhani, Robert E. Wilson, Luciana Bava, Jacob A. Rocker