Patents Assigned to Kemira
  • 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
  • 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
  • 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
  • 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
  • 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
  • Publication number: 20070163735
    Abstract: The present invention concerns a process for reducing the susceptibility of lignocellulosic material to unwanted yellowing, particularly yellowing caused by light and heat. According to the invention, the fibres are activated enzymatically or chemically and then contacted with a modifying agent capable of bonding to the oxidized fibre material, rendering the lignocellulosic fibre material improved resistance to brightness reversion. By means of the invention, brightness reversion caused by light or heat or a combination thereof can be retarded and even stopped.
    Type: Application
    Filed: December 23, 2004
    Publication date: July 19, 2007
    Applicant: KEMIRA OYJ
    Inventors: Johanna Buchert, Liisa Viikari, Stina Gronqvist, Mikael Svedman, Arto Paren, Veli-Matti Vuorenpalo
  • Publication number: 20070158039
    Abstract: The present invention provides methods for deinking printed waste paper—particularly methods that use a deinking composition that includes a hydrophobically-modified inorganic particle (“MIP”) to improve ink collection efficiency under traditional alkaline, reduced alkali, and true neutral deinking conditions. Deinking compositions are provided that include a hydrophobically-MIP substrate, a nonionic surfactant, and a fatty acid, or mixtures thereof. 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 concentrations (“ERIC”) values.
    Type: Application
    Filed: January 9, 2006
    Publication date: July 12, 2007
    Applicant: Kemira Chemicals, Inc.
    Inventors: Scott Rosencrance, Charles Ngome, Kevin Hale
  • Publication number: 20070154415
    Abstract: Inorganic light-absorbing micropigments to which aluminium phosphates are applied are used in sunscreens or cosmetics emulsions.
    Type: Application
    Filed: May 22, 2003
    Publication date: July 5, 2007
    Applicant: Kemira Pigments Oy
    Inventors: Gerd Dahms, Holger Seidel, Olli-Pekka Antinluoma
  • Publication number: 20070134649
    Abstract: The invention is directed to a method for detecting the presence of biofilm-forming microorganisms in a paper or board making process for determining the need of an anti-biofilm agent in the process. The method comprises the steps: (a) subjecting a sampler device in the process line for a period of time to enable said microorganisms to form a biofilm in situ in said process on the surface of the sampler, (b) optionally treating said formed biofilm in a solution of a test anti-biofilm agent for a period of time, then (c) contacting said biofilm with a liquid growth medium in a recession of a culturing device for a period of time, and (d) removing the growth solution from the recession of said device and detecting qualitatively and/or quantitatively the presence or absence of a biofilm adhered on the walls of the recession. An assembly kit is also provided.
    Type: Application
    Filed: November 5, 2004
    Publication date: June 14, 2007
    Applicant: KEMIRA OYJ
    Inventors: Marko Kolari, Mirja Salkinoja-Salonen, Terhi Hatunen
  • Publication number: 20070107859
    Abstract: The present invention relates to methods and compositions for deinking waste paper, optionally in non-alkaline or low-alkaline systems. Deinking compositions are provided that include a blend of an alkoxylated fatty alcohol and a fatty acid. The compositions may further include a second alkoxylated fatty alcohol. The deinking compositions also may include a first non-alkoxylated fatty acid and optionally a second alkoxylated fatty acid. Cationic derivatives such as cationic polymers also may be added to the deinking blend.
    Type: Application
    Filed: January 8, 2007
    Publication date: May 17, 2007
    Applicant: Kemira Chemicals, Inc.
    Inventors: Scott Rosencrance, Charles Ngome
  • Publication number: 20070112185
    Abstract: The invention relates to a method for preparing a cellulose ether. The method comprises mixing cellulose with an ionic liquid solvent to dissolve the cellulose, and then treating the dissolved cellulose with an etherifying agent in the presence of an inorganic base to form a cellulose ether, and subsequently separating the cellulose ether from the solution, wherein both the dissolution and the etherification are carried out in the absence of an organic base and in the substantial absence of water. Microwave irradiation and/or pressure can be applied to assist in dissolution and etherification.
    Type: Application
    Filed: December 2, 2004
    Publication date: May 17, 2007
    Applicant: Kemira OYJ
    Inventors: Vesa Myllymaki, Reijo Aksela
  • Publication number: 20070073051
    Abstract: The invention relates to a method for preparing an organic starch ester. The method comprises mixing a starch material with an ionic liquid solvent to dissolve the starch, and then treating the dissolved starch with an organic esterifying agent to form an organic starch ester, and subsequently separating the organic starch ester from the solution. Microwave irradiation and/or pressure can be applied to assist in dissolution and esterification.
    Type: Application
    Filed: September 10, 2004
    Publication date: March 29, 2007
    Applicant: KEMIRA OYJ
    Inventors: Vesa Myllymaki, Reijo Aksela
  • Patent number: 7169257
    Abstract: The present invention relates to methods and compositions for deinking waste paper, optionally in non-alkaline or low-alkaline systems. Deinking compositions are provided that include a blend of an alkoxylated fatty alcohol and a fatty acid. The compositions may further include a second alkoxylated fatty alcohol. The deinking compositions also may include a first non-alkoxylated fatty acid and optionally a second alkoxylated fatty acid. Cationic derivatives such as cationic polymers also may be added to the deinking blend.
    Type: Grant
    Filed: November 12, 2003
    Date of Patent: January 30, 2007
    Assignee: Kemira Chemicals, Inc.
    Inventors: Scott William Rosencrance, Charles Mesumbe Ngome
  • Patent number: 7166227
    Abstract: A method of treating, in wastewater purification, sludge containing organic matter, divalent iron and phosphorus, in which the sludge that is treated is made to contain dissolved iron and phosphorus at a molar ratio Fe:P of above 1:1, the sludge is treated at 0–100° C. with an acid at a pH of 1–5 for dissolution of divalent iron and phosphorus from the sludge, the sludge is supplied with an oxidizer selected from hydrogen peroxide and percompounds, wherein divalent iron is oxidized by Fenton's reaction to trivalent iron, and (i) trivalent iron is precipitated as trivalent iron phosphate (ii) free radicals with a deodorization and sanitation effect are formed by Fenton's reaction, the sludge is then dewatered at a pH of at most 7, and the aqueous solution obtained in dewatering is recirculated to the wastewater purification.
    Type: Grant
    Filed: April 22, 2004
    Date of Patent: January 23, 2007
    Assignee: Kemira Kemi AB
    Inventors: Göran Karlsson, Ingemar Karsson, Lennart Pettersson, Michael Recktenwald
  • 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
  • Publication number: 20060275226
    Abstract: The mixture consists of c) from 5 to 60% by weight of titanium dioxide onto which organic and/or inorganic auxiliaries can be applied, as component A, d) from 40 to 95% by weight of an organic micropigment dispersion as component B, consisting of b1) from 20 to 75% by weight of at least one methyleoebisbenzo-triazolylphenol in which the benzotriazolyl radicals and phenol radicals can each be independently substituted by one or more C1-20 alkyl radicals, C1-20 alkoxy radicals, C1-20 hydroxyalkyl radicals, C6-12 aryl radicals, halogen, hydroxyl groups or cyano groups, as organic micropigment B1, b2) from 2 to 15% by weight of at least one emulsifier B2, b3) from 0.5 to 5% by weight of organic auxiliaries B3, b4) from 22.5 to 77.5% by weight of water as component B4, the total amount of components B1 to B4 giving 100% by weight, with up to 20% by weight of the mixture being able to be replaced by other constituents.
    Type: Application
    Filed: May 22, 2003
    Publication date: December 7, 2006
    Applicant: KEMIRA PIGMENTS OY
    Inventors: Gerd Dahms, Holger Seidel, Olli-Pekka Antinluoma, Riku Multisilta
  • Patent number: 7138357
    Abstract: The invention relates to a photocatalyst containing titanium dioxide, to a method for using it and to its application. A sulphurous titanium dioxide hydrate precipitate is precipitated from an acid titanium oxysulphate solution at a temperature below the boiling point of the solution, e.g. in the range from 70 to 100° C., using crystal nuclei and without addition of base. The precipitate is separated, washed and calcinated. The photocatalytic titanium dioxide thus obtained has a specific area in the range from 100 to 250 m2/g and a 0.3 to 5% sulphur concentration. Catalytic activity has been confirmed in asetal dehyde decomposition and in anionic (SNC?)2 radical formation.
    Type: Grant
    Filed: April 1, 2003
    Date of Patent: November 21, 2006
    Assignee: Kemira Pigments Oy
    Inventors: Saila Marjatta Karvinen, Ralf-Johan Lamminmäki
  • Publication number: 20060257372
    Abstract: This invention relates to a novel strain of Megasphaera elsdenii and its uses. This invention further relates to preparations and methods incorporating such strain. This invention also relates to feedstuffs for ruminants and a preparation and method for the prevention and treatment of lactic acidosis in ruminants. This invention even further relates to a method of isolating a biologically pure culture of a superior ruminal microorganism in a relatively shorter time period than conventional methods. This invention yet further relates to a method of achieving any one or more of the following improvements in ruminants namely increased milk production; improved feedlot performance; improved growth rate; decrease in finishing time; lower digestive morbidity and mortality; lower incidence of lactic acidosis and related diseases; improved feed conversion efficiency; decrease in roughage content in feeds; and capability to feed on relatively higher concentrate diets.
    Type: Application
    Filed: July 15, 2003
    Publication date: November 16, 2006
    Applicant: Kemira Phosphates (Pty) Limited
    Inventors: Charles Horn, Albrecht Kistner, Barend Greyling, Alexandra Smith
  • 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
  • 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