Patents Assigned to Kemira GrowHow Oyj
  • Ammonium nitrate granule and method for the preparation of the same
    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
  • 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
  • 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
  • Stabilized ammonium nitrate granules
    Patent number: 7147830
    Abstract: The invention relates to a method for producing thermally and mechanically stable ammonium nitrate by dissolving in nitric acid 1–3% by weight of reticulated metal silicate, before treatment with ammonia. The ammonium nitrate granules produced by this method swell very little, they do not considerably cake, and their granule strength is high.
    Type: Grant
    Filed: August 19, 2005
    Date of Patent: December 12, 2006
    Assignee: Kemira Growhow Oyj
    Inventors: Heikki Hero, Juhani Poukari
  • Crystallisation of materials from aqueous solutions
    Patent number: 7127913
    Abstract: The invention is directed to a process for recovering a crystalline material from an aqueous solution, which solution also contains organic contaminants, in which process the material is crystallised from the aqueous solution by freeze crystallising at a eutectic freezing point of the solution.
    Type: Grant
    Filed: October 20, 2000
    Date of Patent: October 31, 2006
    Assignees: Technische Universiteit Delft, Kemira GrowHow Oyj
    Inventors: Geert-Jan Witkamp, Johannes Pieter Vrijenhoef, Johannes de Graauw, Frank van der Ham
  • Coated seed and method for coating seeds
    Publication number: 20060229203
    Abstract: The present invention relates to coated plant seeds, comprising seeds coated with at least one fixing agent comprising an asparatic acid derivative, and with at least one plant nutrient. The present invention is further directed to a method for coating seeds, and a coating composition.
    Type: Application
    Filed: June 3, 2004
    Publication date: October 12, 2006
    Applicant: Kemira GrowHow Oyj
    Inventors: Jari Peltonen, Reijo Aksela, Anders Weckman
  • Process for stabilizing ammonium nitrate
    Patent number: 7014828
    Abstract: The invention relates to a method for producing thermally and mechanically stable ammonium nitrate by dissolving in nitric acid 1–3% by weight of reticulated metal silicate, before treatment with ammonia. The ammonium nitrate granules produced by this method swell very little, they do not considerably cake, and their granule strength is high.
    Type: Grant
    Filed: January 4, 2001
    Date of Patent: March 21, 2006
    Assignee: Kemira GrowHow Oyj
    Inventors: Heikki Hero, Juhani Poukari