Patents Assigned to Kemira
  • 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
  • POLYESTER SURFACTANTS FOR DEINKING
    Publication number: 20130312922
    Abstract: The present invention relates to cost-effective and environmentally friendly polyester surfactants for use in flotation deinking. The improved ink collection of the present invention can result in deinked pulp of high quality and/or yields that has excellent brightness and effective residual ink concentration values.
    Type: Application
    Filed: August 6, 2013
    Publication date: November 28, 2013
    Applicant: Kemira Chemicals, Inc.
    Inventors: Terrence Cotter, Scott Rosencrance, Robert Wilson
  • 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
  • Polyester surfactants for deinking
    Patent number: 8524036
    Abstract: The present invention relates to cost-effective and environmentally friendly polyester surfactants for use in flotation deinking. The improved ink collection of the present invention can result in deinked pulp of high quality and/or yields that has excellent brightness and effective residual ink concentration values.
    Type: Grant
    Filed: October 22, 2012
    Date of Patent: September 3, 2013
    Assignee: Kemira Chemicals, Inc.
    Inventors: Terrence Cotter, Scott Rosencrance, Robert Wilson
  • 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
  • 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
  • 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
  • Method and device arrangement for automatic dose control of chemicals
    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
  • Product for the sizing of paper
    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
  • Polymeric defoamer additive
    Patent number: 8507597
    Abstract: The present invention relates to a cost-effective and environmentally friendly polymeric defoamer formulation for use in various industrial applications that does not contain oil, EBS or free silicone.
    Type: Grant
    Filed: June 29, 2012
    Date of Patent: August 13, 2013
    Assignee: Kemira Chemicals, Inc.
    Inventors: James Martin, Robert Wilson, Scott Rosencrance, David Previs
  • PROCESS FOR THE PREPARATION OF A MIXTURE OF CHELATING AGENTS
    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
  • Well treatment fluid compositions and methods of use that include a delayed release percarbonate formulation
    Patent number: 8501670
    Abstract: A well treatment fluid and method of use includes water, at least one hydratable polymer, an optional crosslinking agent, and a delayed release percarbonate formulation effective to reduce initial viscosity of the fluid after a period of time. Also disclosed are processes for fracturing a subterranean formation.
    Type: Grant
    Filed: October 15, 2008
    Date of Patent: August 6, 2013
    Assignee: Kemira Chemicals Inc.
    Inventors: Carolina Hanna Matilda Andersson, Mona Ezzelarab, Cecilla Eva Maria Johansson, Carl Wilhelm Aften, Walter Philip Watson, Richard Anthony Lalama, Geoffrey Allen Monteith, Frank Schinkel
  • Process for preparation of formate salt
    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
  • METHOD FOR CONTROLLING SIZE DISTRIBUTION OF POLYMER PARTICLES DURING PREPARATION OF AQUEOUS POLYMER DISPERSION AND AQUEOUS POLYMER DISPERSION
    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
  • CONTROL OF ENZYMES IN THE PRODUCTION OF PULP
    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