Patents Assigned to Kemira
  • Patent number: 8236889
    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: May 15, 2009
    Date of Patent: August 7, 2012
    Assignee: Kemira Chemicals, Inc.
    Inventors: James Martin, Robert Wilson, Scott Rosencrance, David Previs
  • Publication number: 20120160774
    Abstract: A detergent builder composition includes a (co)polymer of acrylic acid. The acrylic acid copolymers may be selected from a copolymer of acrylic acid and 2-acrylamido-2-methyl propane sulfonic acid, and a copolymer of acrylic acid and hydroxyethyl methacrylate. Also disclosed are processes for removing calcium and/or magnesium ions with the detergent builder composition.
    Type: Application
    Filed: December 28, 2010
    Publication date: June 28, 2012
    Applicant: KEMIRA OYJ
    Inventors: Lucas MOORE, Deepak PATIL, Robert WILSON
  • Publication number: 20120118523
    Abstract: A dry strength additive composition generally includes an anionic and/or amphoteric polyacrylamide having a molecular weight of less than 1,000,000 Daltons, wherein the amphoteric polyacrylamide has a net negative charge; a cationic and/or amphoteric starch; and a cationic non-starch polymer having a charge density greater than 1 milliequivalent per gram (meq/g) at a pH of 3. The components defining the composition can be added to a pulp suspension sequentially or as a pre-blended mixture.
    Type: Application
    Filed: November 15, 2010
    Publication date: May 17, 2012
    Applicant: KEMIRA OYJ
    Inventors: Chen Lu, Vladimir Grigoriev, Scott Rosencrance
  • Publication number: 20120080157
    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: Application
    Filed: September 30, 2010
    Publication date: April 5, 2012
    Applicant: KEMIRA OYJ
    Inventors: Scott Rosencrance, Yuping Luo, Vladimir Grigoriev
  • Patent number: 8133460
    Abstract: The invention relates to a method for preparing a reducing agent composition, which is used in the selective catalytic reduction of nitrogen oxides and which contains from 20 to 40% by weight of urea, from 20 to 40% by weight of ammonium formate, and water. The composition is prepared by adding urea to the aqueous solution of ammonium formate that is prepared in situ, and by preparing the aqueous solution of ammonium formate using, as starting materials, a source of ammonium, a source of formate, and water.
    Type: Grant
    Filed: February 14, 2008
    Date of Patent: March 13, 2012
    Assignee: Kemira Oyj
    Inventors: Jouko Arvola, Timo Härmä, Eero Hätälä, Lauri Määttä, Timo Nissinen, Pentti Pekonen
  • Publication number: 20120032093
    Abstract: Scale inhibitor compositions and methods of inhibiting scale formation generally include a tagged scale inhibiting (co)polymer including at least one scale inhibiting moiety and an imidazole moiety. The imidazole moiety fluoresces at a wavelength of about 424 nm and can be used to detect the amount of scale inhibitor present.
    Type: Application
    Filed: August 3, 2010
    Publication date: February 9, 2012
    Applicant: KEMIRA CHEMICALS INC.
    Inventors: Lucas Moore, Laura Clapp
  • Publication number: 20120035306
    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: Application
    Filed: October 18, 2011
    Publication date: February 9, 2012
    Applicant: KEMIRA OYJ
    Inventors: Michael Ryan, William Brevard
  • Patent number: 8110018
    Abstract: The invention relates to a fertilizer granule containing ammonium nitrate, comprising a core containing ammonium nitrate and a coating layer containing calcium sulphate. The coating layer consists of a mixture containing calcium sulphate and ammonium nitrate. Such a fertilizer granule is preferably produced by contacting the core with an aqueous ammonium nitrate solution and solid calcium sulphate particles, either as a slurry or separately. The production of the fertilizer granule is safe and easy.
    Type: Grant
    Filed: February 24, 2006
    Date of Patent: February 7, 2012
    Assignee: Kemira Growhow Oyj
    Inventors: Mikko Lylykangas, Harri Kiiski, Juhani Poukari, Robert John Milborne
  • Patent number: 8097125
    Abstract: The invention relates to a composition comprising a (a) a temporary wet strength agent component capable of forming hemi-acetal bonds with the fibers of a tissue web to provide initial wet strength, subsequent rapid degradation of the initial wet strength when the tissue web contacts water; and (b) a sizing agent component capable of imparting water-repelling properties to the tissue web; such that the strength agent component and the sizing agent component are present in sufficient amounts so that when the composition is added to a tissue pulp slurry during a tissue-making process, tissue made from the tissue-making process exhibits a combination of (i) improved initial wet tensile, (ii) improved decay, and (iii) absorbency.
    Type: Grant
    Filed: September 26, 2005
    Date of Patent: January 17, 2012
    Assignee: Kemira Chemicals, Inc.
    Inventors: Michael Ryan, David Dauplaise, William Brevard
  • Patent number: 8092772
    Abstract: The present invention relates to a use of a two-way spray nozzle (1) with protective gas for manufacturing granular sodium percarbonate, said nozzle comprising a central tube (2) having an outlet for an aqueous hydrogen peroxide solution, an inner jacket tube (3) arranged coaxially around the central tube, and having an outlet for aqueous sodium carbonate solution, an outer jacket tube (4) arranged coaxially around the central tube and inner jacket tube, and having an outlet for a protective gas, a threaded ring slot (5) arranged around the central tube at a distance from the outlet of the central tube, wherein the threads of the ring slot are arranged at an angle ? with respect of the direction of the longitudinal axis (12) of the central tube, and in which said protective gas is used at a pressure of less than 0.7 bar. The present invention also relates to a method for manufacturing granular sodium percarbonate.
    Type: Grant
    Filed: October 9, 2008
    Date of Patent: January 10, 2012
    Assignee: Kemira Kemi AB
    Inventors: Uwe Weiss, Michael Jacob, Elin Sohlberg, Ajse Sandqvist, Fredrik Lauritzson
  • Patent number: 8088830
    Abstract: Use of silica sols containing sulfonic acid groups and/or mercapto groups as microparticles in paper production, in particular for paper retention.
    Type: Grant
    Filed: January 12, 2010
    Date of Patent: January 3, 2012
    Assignees: Kemira Oyj, Akzo Nobel Chemicals International B.V.
    Inventors: Karlheinrich Meisel, Bernd Thiele, Gerd-Friedrich Renner, Johan Kijlstra, Arno Nennemann, Thomas Hubbe, Lothar Puppe
  • Patent number: 8075876
    Abstract: Methods of treating animal litter and/or bedding material for control of volatile ammonia and soluble phosphorous include applying granular partially hydrated ferric sulfate to the litter. The partially hydrated ferric sulfate ranges from gray to tan in color and is spread onto the litter at a rate effective to reduce ammonia volatilization and reduce soluble phosphorous. Relative to reagent grade ferric sulfate, the partially hydrated ferric sulfate exhibits lower hygroscopicity and higher deliquescence. The ferric sulfate is prepared by a process comprising oxidizing ferrous sulfate with sulfuric acid using a molecular oxygen oxidizing agent at an elevated pressure relative to atmospheric and at a temperature of 60° C. to 140° C. to produce a gray to tan colored granular product.
    Type: Grant
    Filed: January 23, 2008
    Date of Patent: December 13, 2011
    Assignee: Kemira Water Solutions, Inc.
    Inventors: Jan J. Pavlicek, Victor Johnson
  • Patent number: 8071067
    Abstract: Processes for forming ferric chloride solutions that are stable at relatively low temperatures and suitable for transportation without precipitation are provided. The stable ferric chloride solutions have an iron content of about 16 to about 23 weight percent and a hydrochloric acid content of about 11 to about 17 weight percent, wherein the ferric chloride solution is a stable solution and/or reversibly freezes at ?10° C. Also disclosed are processes for reconstituting the stable ferric chlorides solutions to provide a final iron content of 10 to 14 weight percent and lower the concentration of hydrochloric acid contained therein.
    Type: Grant
    Filed: May 26, 2009
    Date of Patent: December 6, 2011
    Assignee: Kemira Water Solutions, Inc.
    Inventors: Krister Eskilsson, Jeff Campbell, Stig Gunnarsson, Jan Pavlicek
  • Patent number: 8070914
    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 o 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: April 9, 2010
    Date of Patent: December 6, 2011
    Assignee: Kemira Oyj
    Inventors: Michael Ryan, William Brevard
  • Publication number: 20110290150
    Abstract: A composition for sizing paper includes alkenylsuccinic anhydride (ASA) as the sizing agent and an emulsifier system of anionic emulsifiers and nonionic components, wherein the anionic emulsifiers are chosen from alkali metal salts of aliphatic carboxylic acids or aliphatic dicarboxylic acids and the nonionic components are chosen from polyethylene glycols.
    Type: Application
    Filed: November 13, 2009
    Publication date: December 1, 2011
    Applicant: KEMIRA CHEMIE GESMBH
    Inventors: Leo Schmid, Jürgen Sartori
  • Patent number: 8066846
    Abstract: The invention relates to a stabilizing composition comprising following components (A) a polymer having the following formula: wherein R1 is a hydrogen atom or an alkyl group containing 1 to 12 carbon atoms, R2 is —COOM or —CH2COOM, M is a hydrogen atom, an alkali metal ion, an alkaline earth metal ion, an ammonium ion or a mixture thereof, n, m and k are molar ratios of corresponding monomers, wherein n is 0 to 0.95, m is 0.05 to 0.9, and k is 0 to 0.8, and (n+m+k) equals 1, and the weight average molecular weight is between 500 and 20,000,000 g/mol, (B) a chelating agent, (C) a poly-alpha-hydroxyacrylic acid or an alkaline salt thereof or the corresponding polylactone thereof, and (D) optionally a polycarboxylic acid polymer or an alkaline salt thereof. The invention also relates to a process for the treatment of a fiber material.
    Type: Grant
    Filed: January 31, 2008
    Date of Patent: November 29, 2011
    Assignee: Kemira Oyj
    Inventors: Aarto Parén, Jukka Jäkärä, Jukka Rautiainen, Reijo Aksela, Ilkka Renvall, Anna Ilomäki, Minna Sankari, Anna Sundquist, Heli Virkki, Hannu Hämäläinen
  • Patent number: 8052803
    Abstract: The invention relates to a method for preventing chlorine deposition on the heat-transferring surfaces of a boiler, particularly on the superheater, in which boiler a fuel with a chlorine content, such as a biomass or waste fuel, is burned. And to which steam boiler is fed, preferably in the superheater area, a compound with a sulphate content, which forms a particular reagent to fix alkali compounds. The said compound is ferric(III)sulphate, Fe2(SO4)3 and/or aluminium(III)sulphate, Al2(SO4)3.
    Type: Grant
    Filed: June 12, 2006
    Date of Patent: November 8, 2011
    Assignees: Kemira Oyj, Metso Power Oy
    Inventor: Martti Aho
  • Patent number: 8052841
    Abstract: The invention relates to a process for manufacturing paper, in which a filler is pretreated and suspended to form an aqueous slurry, the aqueous slurry obtained is combined with an aqueous suspension containing cellulose fibers to form a stock, the stock obtained is treated at least with a cationic retention agent and the treated stock is filtered to form paper. Retention and optical properties are improved by the filler being pre-treated with inorganic colloidal particles having an average size less than 100 nm.
    Type: Grant
    Filed: April 14, 2004
    Date of Patent: November 8, 2011
    Assignee: Kemira Oyj
    Inventors: Jonni Ahlgren, Kimmo Strengell
  • Patent number: 8048264
    Abstract: The present invention relates to a stabilizing composition comprising following components (A) a polymer having following formula wherein R1 is a hydrogen atom or an alkyl group containing 1 to 12 carbon atoms, R2 is —COOM or —CH2COOM, M is a hydrogen atom, an alkali metal ion, an alkaline earth metal ion, an ammonium ion or a mixture thereof, n, m and k are molar ratios of corresponding monomers, wherein n is 0 to 0.95, m is 0.05 to 0.9, and k is 0 to 0.8, and (n+m+k) equals 1, and the weight average molecular weight is between 500 and 20,000,000 g/mol, (B) a chelating agent, and (C) an alkaline earth metal compound. The invention also relates to a process for the treatment of a fiber material.
    Type: Grant
    Filed: May 10, 2005
    Date of Patent: November 1, 2011
    Assignee: Kemira Oyj
    Inventors: Aarto Parén, Jonni Ahlgren, Jukka Jäkärä, Ilkka Renvall, Jukka Rautiainen
  • Publication number: 20110263836
    Abstract: A method for treating lignin-containing fibrous material to reduce its susceptibility to yellowing generally includes enzymatically stabilizing the lignin of the material with an oxidizing agent capable of oxidizing phenolic or similar groups, which may undergo reactions conductive to the formation of colored sites on the fibers, and treating the material with a fluorescent whitening agent. Also disclosed are lignin-containing materials obtained by the method.
    Type: Application
    Filed: April 17, 2009
    Publication date: October 27, 2011
    Applicant: KEMIRA OYJ
    Inventors: Veli-Matti Vuorenpalo, Jaakko Pere, Reijo Aksela, Andrei Tauber