Patents Assigned to Kemira
  • WELL TREATMENT FLUID COMPOSITIONS AND METHODS OF USE THAT INCLUDE A DELAYED RELEASE PERCARBONATE FORMULATION
    Publication number: 20090095472
    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: Application
    Filed: October 15, 2008
    Publication date: April 16, 2009
    Applicant: KEMIRA CHEMICALS INC.
    Inventors: Carolina Hanna Matilda Andersson, Mona Ezzelarab, Cecilia Eva Maria Johansson, Carl Wilhelm Aften, Walter Philip Watson, Richard Anthony Lalama, Geoffrey Allen Monteith, Frank Schinkel
  • ENVIRONMENTALLY COMPATIBLE DEFOAMING COMPOSITION FOR USE IN FLUIDS
    Publication number: 20090075848
    Abstract: Defoaming compositions for reducing the amount of gas present in a fluid such as a cement composition are provided. In an embodiment, a defoaming composition includes a carboxylic acid compound or an ester of a carboxylic acid compound; an alpha olefin compound; and an alcohol compound.
    Type: Application
    Filed: September 12, 2008
    Publication date: March 19, 2009
    Applicant: KEMIRA CHEMICALS INC.
    Inventors: Jim Patrick Arduino, Charles Theodore Gammon
  • HIGH-PERFORMANCE STRENGTH RESINS IN PAPERMAKING INDUSTRIES
    Publication number: 20090071618
    Abstract: A composition comprising a functionalized water-soluble, cationic, thermosetting, cellulose reactive polymer with a doubly structured backbone that is the reaction product of: (a) a copolymerized (i) acrylamide component, (ii) cationic co-monomer component and (iii) at least one multifunctional crosslinking monomer component; and (b) a cellulose reactive agent component; such that the acrylamide component, the cationic co-monomer component, the multifunctional crosslinking monomer component, and the cellulose reactive agent component are in an amount sufficient amount to produce a polymer that imparts strength to a fibrous substrate when the polymer is added to paper stock during a papermaking process. The invention also relates to methods for making and using such a composition.
    Type: Application
    Filed: April 19, 2005
    Publication date: March 19, 2009
    Applicant: KEMIRA OYJ
    Inventors: Naijie Zhang, Michael S. Ryan
  • DEPOLYMERIZATION METHOD
    Publication number: 20090032015
    Abstract: The invention relates to a method for depolymerizing starch comprising mixing a starch material with an ionic liquid solvent to dissolve the starch, and then treating the dissolved starch by agitating at a temperature and for a period for time to effect depolymerization of the starch into desired depolymerization products.
    Type: Application
    Filed: January 4, 2005
    Publication date: February 5, 2009
    Applicant: KEMIRA OYJ
    Inventors: Vesa Myllymaki, Reijo Aksela
  • Mineral Dispersants and Methods for Preparing Mineral Slurries Using the Same
    Publication number: 20090014695
    Abstract: A mineral slurry comprises mineral particles in an amount equal to or greater than about 60 percent by total weight of the slurry, wherein 85 percent of the mineral particles have an average particle size equal to or less than 2 micrometers; a polyelectrolyte dispersant derived from an acrylate polymer formed by reversible addition-fragmentation chain transfer polymerization, wherein the polyelectrolyte dispersant comprises endgroups comprising thio-containing residues derived from a trithiocarbonate chain transfer agent, wherein the polyelectrolyte dispersant is in an amount less than about 35 pounds of the dispersant per ton of dry mineral particles, and wherein the polyelectrolyte dispersant has a molecular weight of 3000 to 10,000 Daltons and a polydispersity of at least 1.0 and less than 1.5; and the remainder water.
    Type: Application
    Filed: July 14, 2008
    Publication date: January 15, 2009
    Applicant: KEMIRA OYJ
    Inventor: Thomas J. Lynch
  • 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