Patents Assigned to Kemira
  • Method for deinking pulp using premixed hydrophobically modified calcium carbonate particles
    Patent number: 7862685
    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: Grant
    Filed: January 9, 2006
    Date of Patent: January 4, 2011
    Assignee: Kemira Chemicals, Inc.
    Inventors: Scott Rosencrance, Charles Ngome, Kevin M. Hale
  • REDUCED SHEAR CELLULOSE REACTIVE SIZING AGENT FOR WET END APPLICATIONS
    Publication number: 20100307706
    Abstract: The invention relates to a method for sizing a paper product that involves the steps of (a) providing a paper stock system; (b) forming, in the absence of high shearing forces, an aqueous sizing emulsion comprising an alkenylsuccinic anhydride component; (c) submitting the emulsion formed from step b to a post-dilution step in the presence of a cationic component under conditions, in the absence of high shearing forces, that produce a post-diluted emulsion having improved sizing efficacy; (d) adding the post-diluted emulsion to the paper stock; and (e) forming a paper web.
    Type: Application
    Filed: October 27, 2005
    Publication date: December 9, 2010
    Applicant: KEMIRA OYJ
    Inventors: Lucyna Pawlowska, Kimberly C. Dilts, Thomas Long, Charles R. Hunter, Robert Proverb
  • Processes For Making Stable Ferric Chloride Solutions
    Publication number: 20100301255
    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: Application
    Filed: May 26, 2009
    Publication date: December 2, 2010
    Applicant: KEMIRA CHEMICALS INC.
    Inventors: Krister Eskilsson, Jeff Campbell, Stig Gunnarsson, Jan Pavlicek
  • COMPOSITION AND METHOD FOR TREATING WOOD
    Publication number: 20100297460
    Abstract: According to the invention, wood material is treated with a composition comprising at least one C1-C7 monocarboxylic acid or a salt, or mixtures thereof, and at least one chelating agent. These compounds are dissolved in a liquid aqueous vehicle. In this manner, the treated wood is endowed with excellent resistance against detrimental environmental effects.
    Type: Application
    Filed: December 3, 2008
    Publication date: November 25, 2010
    Applicant: KEMIRA OYJ
    Inventors: Jari-Jukka Kukkonen, Timo Nissinen, Reijo Aksela
  • POLYMERIC DEFOAMER ADDITIVE
    Publication number: 20100292380
    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: Application
    Filed: May 15, 2009
    Publication date: November 18, 2010
    Applicant: Kemira Chemicals, Inc.
    Inventors: James Martin, Robert Wilson, Scott Rosencrance, David Previs
  • Method for monitoring the presence of biofilmforming microorganisms in paper industry
    Patent number: 7829305
    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: Grant
    Filed: November 5, 2004
    Date of Patent: November 9, 2010
    Assignee: Kemira Oyj
    Inventors: Marko Kolari, Mirja Salkinoja-Salonen, Terhi Johanna Hatunen
  • COMPOSITIONS AND PROCESSES FOR SEPARATION OF BITUMEN FROM OIL SAND ORES
    Publication number: 20100258477
    Abstract: Compositions and processes for separating bitumen from oil sands ore include contacting the oil sand ores with a composition including a carboxylate salt and/or acid and an aqueous liquid carrier. The carboxylate salt and/or acid is a C1-C7 alkyl, and in one embodiment, is a monocarboxylate.
    Type: Application
    Filed: April 13, 2009
    Publication date: October 14, 2010
    Applicant: KEMIRA CHEMICALS, INC.
    Inventors: Jari-Jukka Kukkonen, Eero Aitta, Pekka Oinas, Kaj Jansson, Mohan Nair
  • Method for removing lignin from water
    Patent number: 7794604
    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: Grant
    Filed: July 8, 2005
    Date of Patent: September 14, 2010
    Assignee: Kemira Oyj
    Inventors: Heikki Palonen, Arja Paloniemi, Reetta Taittonen, Päivi Rousu
  • BIOCIDE FOR WELL STIMULATION AND TREATMENT FLUIDS
    Publication number: 20100218950
    Abstract: A well stimulation and or treatment fluid that includes water, other additives, and a biocide consisting of 3,5-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: May 11, 2010
    Publication date: September 2, 2010
    Applicant: KEMIRA CHEMICALS, INC.
    Inventors: Ronald Joe Starkey, II, Geoffrey Allen Monteith, Carl Wilhelm Aften
  • Biocide for well stimulation and treatment fluids
    Patent number: 7786054
    Abstract: A well stimulation and or treatment fluid that includes water, other additives, and a biocide consisting of 3,5-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: Grant
    Filed: July 18, 2007
    Date of Patent: August 31, 2010
    Assignee: Kemira Chemicals, Inc.
    Inventors: Ronald Joe Starkey, II, Geoffrey Allen Monteith, Carl Wilhelm Aften
  • Cationic starch graft copolymers and novel process for the preparation of cationic starch graft copolymers
    Patent number: 7786238
    Abstract: Cationic starch graft copolymer composed of the monomers a) to d) a) 20-80% by weight of acrylamide, methacrylamide or mixtures thereof, b) 3-20% by weight of at least one basic or cationic vinyl monomer, c) 0.005-1.5% by weight of at least one bifunctional or higher-functional crosslinking agent, d) 0-10% by weight of at least one nonionic or anionic vinyl monomer which differs from the monomers mentioned under a) to c) and a grafting base e) e) 15-70% by weight of at least one starch or one starch derivative, the sum of a) to e) being 100% by weight.
    Type: Grant
    Filed: February 26, 2004
    Date of Patent: August 31, 2010
    Assignee: Kemira Oyj
    Inventors: Bernd Hauschel, Bernd Thiele, Thomas Hübbe, Bernhard Jansen
  • GRAFT POLYMER LATEX AND METHOD OF PREPARING
    Publication number: 20100216934
    Abstract: Method of grafting an anionic organic polymer to an organic polymer in latex form, which method comprises forming a water-based mixture of (1) a latex of an organic polymer, (2) an anionic organic polymer, and (3) a free radical initiator, and effecting grafting between said latex polymer and said anionic organic polymer characterized in that the anionic organic polymer is (i) an anionic homopolymer or anionic random copolymer wherein at least 50 mole % of the repeating units are repeating units that bear at least one acid group or acid salt group or (ii) a graft or block copolymer comprising a segment consisting of a anionic homopolymer or anionic random copolymer as defined in (i), and aqueous dispersion comprising graft polymer particles.
    Type: Application
    Filed: March 31, 2008
    Publication date: August 26, 2010
    Applicant: KEMIRA OYJ
    Inventors: Teppo Sahlberg, Jan-Luiken Hemmes, Jonni Ahlgren, Uwe Schulze, Claudia Eigen
  • Device and method for continuously producing emulsions or dispersions
    Patent number: 7775704
    Abstract: A device for continuously producing emulsions or dispersions while excluding air comprises a mixing vessel, which is closed on all sides and which has supply tubes and discharge tubes for introducing and discharging fluid substances or compositions, and also an impeller, which permits an agitating input into the emulsion or dispersion without generating cavitation forces and without high-pressure homogenization. For preparing the cosmetic emulsions of the invention, as well, emulsifiers are generally used.
    Type: Grant
    Filed: March 21, 2003
    Date of Patent: August 17, 2010
    Assignee: Kemira Oyj
    Inventors: Gerd Dahms, Helmut Hegmann
  • METHOD FOR ENZYMATIC TREATMENT OF SLUDGE IN WATER PURIFICATION
    Publication number: 20100200499
    Abstract: The present invention relates to a method for treatment of sludge in water purification, the method comprising the steps: providing an enzyme mixture comprising at least one enzyme capable of digesting natural polymeric materials; and adding the enzyme mixture and at least one chelating reagent, in optional order or simultaneously, to an aqueous sludge suspension.
    Type: Application
    Filed: May 31, 2008
    Publication date: August 12, 2010
    Applicant: KEMIRA OYJ
    Inventors: Estera Szwajcer Dey, Olof Norrlow
  • FRICTION REDUCING COMPOSITIONS FOR WELL TREATMENT FLUIDS AND METHODS OF USE
    Publication number: 20100200239
    Abstract: Friction reducing compositions for use in well treatment fluids generally include an aqueous fluid; a polymeric friction reducer; and 3,5-dimethyl-1,3,5-thiadiazinane-2-thione. It has been found that the combination of the polymeric friction reducer; and 3,5-dimethyl-1,3,5-thiadiazinane-2-thione unexpectedly and synergistically increases friction reduction and inversion behavior, where applicable. Also disclosed are methods for the fracturing of a subterranean hydrocarbon bearing formation to stimulate the production of the hydrocarbons by injecting the friction reducing composition.
    Type: Application
    Filed: February 9, 2009
    Publication date: August 12, 2010
    Applicant: Kemira Chemicals, Inc.
    Inventor: Carl Wilhelm Aften
  • Deinking blends for use in reduced alkali systems
    Patent number: 7767057
    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: January 8, 2007
    Date of Patent: August 3, 2010
    Assignee: Kemira Chemicals, Inc.
    Inventors: Scott William Rosencrance, Charles Mesumbe Ngome
  • Strong and dispersible paper products
    Patent number: 7767059
    Abstract: The invention relates to a flushable paper product comprising a fibrous substrate having (i) at least one strength region comprising a reacted cationic or a reacted nonionic strength agent and (ii) at least one dispersibility region, wherein the paper product has (a) a dispersibility of at least one tenth of a second, (b) a dry strength, and (c) a wet strength of at least about five percent of the dry strength.
    Type: Grant
    Filed: June 18, 2003
    Date of Patent: August 3, 2010
    Assignee: Kemira Oyj
    Inventors: Michael Ryan, David L. Dauplaise
  • Bleaching of cellulosic fibre material with peroxide using polymers as a stabiliser
    Patent number: 7754048
    Abstract: The present invention relates to a process for bleaching a cellulosic fibre material with a peroxide compound in an aqueous alkaline medium, comprising a bleaching step wherein: a) a first polymer (A) comprising a homopolymer of acrylic acid, methacrylic acid or maleic acid, or a copolymer of acrylic acid and/or methacrylic acid with an unsaturated dicarboxylic acid, and a solution of a second polymer (B) comprising a poly-alpha-hydroxyacrylic acid or a salt thereof, are added to a cellulosic fibre material, and b) thereafter adding a peroxide compound and an alkaline substance and carrying out the bleaching.
    Type: Grant
    Filed: January 9, 2004
    Date of Patent: July 13, 2010
    Assignee: Kemira Oyj
    Inventors: Aarto Paren, Jukka Jäkärä, Ilkka Renvall, Jonni Ahlgren, Riitta Laitinen, Jussi Nikkarinen, Tapio Viitanen
  • PROCESS FOR THE PRODUCTION OF POLYALUMINIUM SALTS
    Publication number: 20100170778
    Abstract: The present invention relates to a process for the production of polyaluminium salts, preferably polyaluminium sulphate and polyaluminium chloride, and derivatives thereof, from aluminium containing raw materials and acids, wherein microwaves are used for partial heating of the reaction mixture. The present invention also relates to a system for the production of polyaluminium salts and derivatives thereof.
    Type: Application
    Filed: June 5, 2008
    Publication date: July 8, 2010
    Applicant: KEMIRA KEMI AB
    Inventors: Stig Gunnarsson, Marten Soderlund
  • Reducing Agent Composition
    Patent number: 7744837
    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: Grant
    Filed: August 3, 2005
    Date of Patent: June 29, 2010
    Assignee: Kemira Oyj
    Inventors: Timo Nissinen, Timo Härmä, Jari-Jukka Kukkonen