Patents Assigned to Kemira
  • Reducing Agent Composition
    Publication number: 20090010829
    Abstract: The invention relates to a reducing agent composition for use in the catalytic reduction process of nitrogen oxides in exhaust gases, the composition containing 20-40 w % of urea, 19-40 w % of ammonium formate, and water.
    Type: Application
    Filed: August 3, 2005
    Publication date: January 8, 2009
    Applicant: KEMIRA OYJ
    Inventors: Timo Nissinen, Timo Harma, Jari-Jukka Kukkonen
  • Process for the Preparation of an Adsorbent Material Containing Iron Oxyhydroxide, Adsorbent Material and the Use Thereof
    Publication number: 20080257823
    Abstract: The invention relates to a process for producing an adsorbent material containing iron oxyhydroxide, wherein an iron oxyhydroxide mass having a moisture content of 5-15% by weight is produced, said mass is granulated by compaction, followed by comminution and sieving of the compacted product to give product granules with grain sizes ranging between 0.5 and 4 mm. The invention is also relates to a granular adsorbent material containing iron oxyhydroxide, the grain size of the granules being between 0.5 and 4 mm, and the bulk density thereof being from 0.8 to 1.5 g/cm3. Said adsorbent material may be used for removing harmful substances, particularly arsenic, from an aqueous solution thereof.
    Type: Application
    Filed: September 23, 2005
    Publication date: October 23, 2008
    Applicant: KEMIRA OJY
    Inventor: Mika Martikainen
  • TREATMENT OF ANIMAL LITTER WITH FERRIC SULFATE GRANULES
    Publication number: 20080173248
    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: Application
    Filed: January 23, 2008
    Publication date: July 24, 2008
    Applicant: KEMIRA WATER SOLUTIONS INC.
    Inventors: Jan J. Pavlicek, Victor Johnson
  • Method For Removing Light From Water
    Publication number: 20080149568
    Abstract: The invention relates to a method for removing lignin from an aqueous solution. It is accomplished by adding a calcium compound and an aluminium compound to said solution. Said calcium compound is preferably calcium chloride and said aluminium compound is preferably a polymeric aluminium hydroxide salt.
    Type: Application
    Filed: July 8, 2005
    Publication date: June 26, 2008
    Applicant: KEMIRA OYJ
    Inventors: Heikki Palonen, Arja Paloniemi, Reetta Taittonen, Paivi Rousu
  • COMPOSITION AND METHOD FOR PAPER PROCESSING
    Publication number: 20080128102
    Abstract: According to the present invention, a process is provided for making paper or board comprising forming a cellulosic suspension that may or may not comprise a filler, flocculating the cellulosic suspension, draining the cellulosic suspension on a screen to form a sheet, wherein the cellulosic suspension is flocculated using a flocculation system comprising the sequential or simultaneous addition of a siliceous material and an organic, cationic or anionic, water-in-water or dispersion micropolymer in a salt solution.
    Type: Application
    Filed: September 14, 2007
    Publication date: June 5, 2008
    Applicant: KEMIRA OYJ
    Inventors: Marco Savio Polverari, Christopher Michael Lewis, Matthew Gerard Fabian
  • Solid-liquid separation of oil-based muds
    Patent number: 7381332
    Abstract: This invention relates to a method of achieving a solid-liquid separation of an oil-based mud comprising the step of contacting said oil-based mud with a water-in-oil emulsion comprising a polymer derived from at least one water-soluble monomer, where the polymer is not dissolved prior to contact with the oil-based mud, mixing the water-in-oil emulsion and the oil-based mud and separating the solid phase from the liquid phase in the oil-based mud. In addition, this invention also relates to a composition comprising an oil-based mud with a water-in-oil emulsion comprising a polymer derived from at least one water-soluble monomer, wherein the polymer is not dissolved prior to contact with the oil-based mud.
    Type: Grant
    Filed: July 16, 2004
    Date of Patent: June 3, 2008
    Assignee: Kemira Oyj
    Inventors: Jorge Eduardo Adams Pena, Henry M. Masias, Sun-Yi Huang, Raymond S. Farinato
  • Fixing agent in the form of an oil/water type emulsion or suspension, and preparation of the same
    Patent number: 7367158
    Abstract: A fixing agent in the form of an oil/water type, lamellar emulsion or suspension in which the aqueous phase is the principal component, the aqueous phase containing water and a byproduct of agriculture or fermentation and the oil phase containing oil and emulsifiers. The emulsion or suspension is prepared by adding an aqueous solution to the oil phase in order to produce a water/oil type emulsion or suspension, by adding a portion of the aqueous phase in order to produce an inverse oil/water type emulsion or suspension, and by thereafter mixing the oil/water type emulsion or suspension with the remainder of the aqueous phase.
    Type: Grant
    Filed: February 13, 2002
    Date of Patent: May 6, 2008
    Assignees: Neste Oil Oyj, Kemira Growhow Oyj
    Inventors: Marja-Riitta Hakala, Pekka Lukkarinen, Jari Peltonen, Heikki Hero
  • Ammonium Nitrate Granule and Method for the Preparation of the Same
    Publication number: 20080098781
    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: Application
    Filed: February 24, 2006
    Publication date: May 1, 2008
    Applicant: KEMIRA GROWHOW OYI
    Inventors: Mikko Lylykangas, Harri Kiiski, Juhani Poukari, Robert Milborne
  • Solid-liquid separation of oil-based muds
    Patent number: 7338608
    Abstract: This invention relates to a method of achieving a solid-liquid separation of an oil-based mud comprising the step of contacting said oil-based mud with a water-in-oil emulsion comprising a polymer derived from at least one water-soluble monomer, where the polymer is not dissolved prior to contact with the oil-based mud, mixing the water-in-oil emulsion and the oil-based mud and separating the solid phase from the liquid phase in the oil-based mud. In addition, this invention also relates to a composition comprising an oil-based mud with a water-in-oil emulsion comprising a polymer derived from at least one water-soluble monomer, wherein the polymer is not dissolved prior to contact with the oil-based mud.
    Type: Grant
    Filed: September 30, 2003
    Date of Patent: March 4, 2008
    Assignee: Kemira Oyj
    Inventors: Jorge Adams, Henry Masias, Sun-Yi Huang, Raymond Farinato
  • Cationic Polymers Containing 2-Hydrocyethyl-Methacrylic As Promoters For Asa Sizing
    Publication number: 20080047678
    Abstract: The invention relates to polymers useful as a papermaking additives, The invention also relates to methods for making and using such additives.
    Type: Application
    Filed: April 19, 2005
    Publication date: February 28, 2008
    Applicant: KEMIRA OYJ
    Inventors: Lucyna Pawlowska, Robert Proverb
  • Method and Device Arrangement for Automatic Dose Control of Chemicals
    Publication number: 20080046127
    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: Application
    Filed: August 27, 2004
    Publication date: February 21, 2008
    Applicant: KEMIRA OYJ
    Inventors: Eila Piironen, Esko Juuso, Iiris Joensuu, Aki Sorsa
  • Process for Manufacturing of Paper
    Publication number: 20080035293
    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 fibres 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: Application
    Filed: April 14, 2004
    Publication date: February 14, 2008
    Applicant: KEMIRA OYJ
    Inventors: Jonni Ahlgren, Kimmo Strengell
  • BIOCIDE FOR WELL STIMULATION AND TREATMENT FLUIDS
    Publication number: 20080029266
    Abstract: A well stimulation and or treatment fluid that includes water, other additives, and a biocide consisting of 2,5-dimethyl-1,3,5-thiadiazinane-2-thione in an amount effective to inhibit bacterial growth and minimize antagonistic reactions between the biocide and other additives. Also disclosed are well injection compositions, stimulations, squeezing, waterflood, packing, cement compositions, and methods for cementing.
    Type: Application
    Filed: July 18, 2007
    Publication date: February 7, 2008
    Applicant: Kemira Chemicals, Inc.
    Inventors: Ronald Joe Starkey, Geoffrey Allen Monteith, Carl Wilhelm Aften
  • Method for Preparing a Suspension Containing Phosphate
    Publication number: 20080022740
    Abstract: The invention relates to a method for preparing a suspension containing phosphate stepwise directly from raw materials, from phosphoric acid of fertilizer quality, a base and organic additives. In accordance with the method, the phosphoric acid is preneutralised with the base, the organic additives are added, nucleation is controlled and phosphate salts are cooling crystallised in order to form a suspension. The phosphate suspension prepared with the method of the invention is applicable to seed coating.
    Type: Application
    Filed: May 19, 2005
    Publication date: January 31, 2008
    Applicant: Kemira GrowHow Oyj
    Inventors: Eija Saarikko, Juhani Poukari, Paula Ylinen, Anders Weckman
  • Dissolution Method
    Publication number: 20080023162
    Abstract: The invention relates to a method for dissolving wood, straw and other natural lignocellulosic materials in an ionic liquid solvent under microwave irradiation and/or under pressure. The invention also relates to the resulting solution and to methods for separating cellulose and other organic compounds, such as lignin and extractives, from the solution.
    Type: Application
    Filed: August 13, 2004
    Publication date: January 31, 2008
    Applicant: KEMIRA OYJ
    Inventors: Vesa Myllymaki, Reijo Aksela
  • Temporary Wet Strength Agents And Products Made From Such Agents
    Publication number: 20080017339
    Abstract: The invention relates to a tissue product that includes (a) a tissue fibrous web incorporated throughout the tissue product; (b) a temporary wet strength agent capable of forming hemi-acetal bonds with the fibers of the web to prevent immediate degradation of the web when the tissue product contacts water; and (c) a composition containing a degrading agent selected from the group consisting of alkaline agents, oxidizing agents, nucleophilic agents, and combinations thereof. The invention also relates to compositions used to make such a tissue product as well as methods for making and using such compositions.
    Type: Application
    Filed: September 26, 2005
    Publication date: January 24, 2008
    Applicant: KEMIRA OYJ
    Inventors: Naijie Zhang, Michael Ryan
  • Method for supplying oxygen to a water purification process
    Patent number: 7311835
    Abstract: The present invention relates to a method for supplying oxygen to a water purification process, said method comprising providing an oxygen carrier of at least one copolymer of dimethylsiloxane, ethylene oxide and propylene oxide, adding said oxygen carrier to the water purifying process, and contacting said oxygen carrier with an oxygen containing gas. The invention further relates to the use of at least one copolymer of dimethylsiloxane, ethylene oxide and propylene oxide, as an oxygen carrier in a water purification process.
    Type: Grant
    Filed: November 20, 2003
    Date of Patent: December 25, 2007
    Assignee: Kemira Oyj
    Inventors: Estera Szwajcer Dey, Olof Norrlöw
  • Process for Deinking Waste Paper
    Publication number: 20070246175
    Abstract: The present invention relates to a process for deinking waste paper comprising treating the waste paper with a peroxide compound in an aqueous alkaline medium in the presence of a first polymer (A) comprising a Ca-binding polymer in the form of a polycarboxylate polymer and a second polymer (B) comprising a poly-alfa-hydroxyacrylic acid or a salt thereof or the corresponding polylactone, said process additionally comprising treating the waste paper with at least one non-ionic surfactant or with at least one combination of a non-ionic surfactant and a fatty acid or a salt thereof to promote ink detachment and/or ink removal.
    Type: Application
    Filed: June 16, 2005
    Publication date: October 25, 2007
    Applicant: KEMIRA OYJ
    Inventors: Bob Horacek, Jukka Jakara, Mikael Svedman
  • Antimicrobial Acidifying Feed Product and Method of its Production
    Publication number: 20070212446
    Abstract: The invention concerns an antimicrobial acidifying feed product comprising a core and a coating, the core comprising a porous carrier and at least one acid and the coating comprising at least one organic acid, or a salt, ester or glyceride of said acid(s), wherein the pKa-value of at least one acid in the core is lower than the pKa-value of at least one organic acid in the coating, and methods of its production.
    Type: Application
    Filed: June 10, 2005
    Publication date: September 13, 2007
    Applicant: Kemira Growhow AB
    Inventors: Nils Jansson, Jan Hermansson, Bernt Nilsson
  • Titanium oxide product method for making the same and its use as a photocatalyst
    Publication number: 20070173405
    Abstract: The invention relates to a process for manufacturing a particulate titanium dioxide product, wherein hydrated titanium dioxide is precipitated from an aqueous solution of titanium oxychlioride by adding to the solution titanium dioxide particles as crystal nuclei and the product obtained from the precipitation step is isolated and optionally calcined. The process is characterized by the addition of crystal nuclei to an aqueous solution of titanium oxychloride having a content of >90 g TiO2/l calculated as TiO2 and the performance of precipitation at a temperature below the boiling point of the said aqueous solution and at normal pressure. In addition, the invention relates to a titanium dioxide product prepared by using the process, the use of the product as a photocatalyst, and a photocatalyst, which comprises a titanium dioxide product prepared according to the invention.
    Type: Application
    Filed: February 4, 2005
    Publication date: July 26, 2007
    Applicant: Kemira Pigments OY
    Inventors: Saila Karvinen, Ralf-Johan Lamminmaki