Patents Assigned to Kemira Chemicals, Inc.
  • Patent number: 9404216
    Abstract: A polyester surfactant includes a condensation esterification product of a) a polyhydric alcohol, b) a dimer or trimer of an C2 to C42 acid, and c) polyethylene glycol and polypropylene glycol. The polyhydric alcohol is selected from glycerol, arabitol, sorbitol, sorbitan, mannitol, mannitan, erythritol, pentaerythritol, or mixtures thereof. The polyester surfactant is used for deinking, for example, printed waste paper. A method for deinking includes a step of contacting an aqueous pulp slurry with the addition of a composition comprising a polyester surfactant.
    Type: Grant
    Filed: August 6, 2013
    Date of Patent: August 2, 2016
    Assignee: KEMIRA CHEMICALS, INC.
    Inventors: Terrence Cotter, Scott Rosencrance, Robert Wilson
  • Patent number: 9309137
    Abstract: Scale inhibitor compositions and methods of inhibiting scale formation generally include a tagged scale inhibiting (co)polymer including at least one scale inhibiting moiety and an imidazole moiety. The imidazole moiety fluoresces at a wavelength of about 424 nm and can be used to detect the amount of scale inhibitor present.
    Type: Grant
    Filed: March 5, 2015
    Date of Patent: April 12, 2016
    Assignee: Kemira Chemicals Inc.
    Inventors: Lucas Moore, Laura Clapp
  • Patent number: 9150779
    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: Grant
    Filed: February 22, 2013
    Date of Patent: October 6, 2015
    Assignee: Kemira Chemicals Inc.
    Inventors: Carolina Hanna Matilda Anderson, Mona Ezzelarab, Cecilla Eva Maria Johansson, Carl Wilhelm Aften, Walter Philip Watson, Richard Anthony Lalama, Geoffrey Allen Monteith, Frank Schinkel
  • Patent number: 8980123
    Abstract: Scale inhibitor compositions and methods of inhibiting scale formation generally include a tagged scale inhibiting (co)polymer including at least one scale inhibiting moiety and an imidazole moiety. The imidazole moiety fluoresces at a wavelength of about 424 nm and can be used to detect the amount of scale inhibitor present.
    Type: Grant
    Filed: April 22, 2013
    Date of Patent: March 17, 2015
    Assignee: Kemira Chemicals Inc.
    Inventors: Lucas Moore, Laura Clapp
  • Publication number: 20130312922
    Abstract: The present invention relates to cost-effective and environmentally friendly polyester surfactants for use in flotation deinking. 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 concentration values.
    Type: Application
    Filed: August 6, 2013
    Publication date: November 28, 2013
    Applicant: Kemira Chemicals, Inc.
    Inventors: Terrence Cotter, Scott Rosencrance, Robert Wilson
  • Patent number: 8524036
    Abstract: The present invention relates to cost-effective and environmentally friendly polyester surfactants for use in flotation deinking. 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 concentration values.
    Type: Grant
    Filed: October 22, 2012
    Date of Patent: September 3, 2013
    Assignee: Kemira Chemicals, Inc.
    Inventors: Terrence Cotter, Scott Rosencrance, Robert Wilson
  • Patent number: 8507597
    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: Grant
    Filed: June 29, 2012
    Date of Patent: August 13, 2013
    Assignee: Kemira Chemicals, Inc.
    Inventors: James Martin, Robert Wilson, Scott Rosencrance, David Previs
  • Patent number: 8501670
    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: Grant
    Filed: October 15, 2008
    Date of Patent: August 6, 2013
    Assignee: Kemira Chemicals Inc.
    Inventors: Carolina Hanna Matilda Andersson, Mona Ezzelarab, Cecilla Eva Maria Johansson, Carl Wilhelm Aften, Walter Philip Watson, Richard Anthony Lalama, Geoffrey Allen Monteith, Frank Schinkel
  • Publication number: 20130037229
    Abstract: The present invention relates to cost-effective and environmentally friendly polyester surfactants for use in flotation deinking 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 concentration values.
    Type: Application
    Filed: October 22, 2012
    Publication date: February 14, 2013
    Applicant: Kemira Chemicals, Inc.
    Inventor: Kemira Chemicals, Inc.
  • Patent number: 8338341
    Abstract: The invention provides a process for the production of a granule of a coated oxidizing compound which granule has good delayed release properties, said process comprising a) providing cores of an oxidizing compound produced by fluidized bed spray granulation, b) spraying on the oxidizing compound cores an aqueous solution of metal sili-cate in a fluidized bed, said aqueous solution comprising at least 15% by weight metal silicate, and c) drying to form a metal silicate coating layer on the oxidizing compound core, provided that the amount of metal silicate coating layer is at least 8%, preferably at least 10% by weight based on the total weight of the granule. The invention also provides such granule and well treatment fluids including such granule, and processes for use.
    Type: Grant
    Filed: October 15, 2008
    Date of Patent: December 25, 2012
    Assignees: Kemira Kemi AB, Kemira Chemicals, Inc.
    Inventors: Mona Ezzelarab, Carl Aften, Carolina Andersson, Cecilia Johansson, Richard Lalama, Geoffrey Monteith, Lars-Inge Olsson, Ajse Sandqvist, Frank Schinkel, Markus Svensson, Walter Watson, Caroline Wegner
  • Patent number: 8317973
    Abstract: The present invention relates to cost-effective and environmentally friendly polyester surfactants containing a condensation esterification product of a polyhydric alcohol, a multimeric acid, and at least one polyalkylene glycol for use in flotation deinking under traditional alkaline, reduced alkali, and true neutral deinking conditions. The polyester deinking surfactants of the present invention will effectively exhibit greater selectivity than traditional flotation deinking surfactants. In particular, the polyester deinking surfactants can give better foam control, improved yield, and no loss in ERIC reduction.
    Type: Grant
    Filed: November 11, 2009
    Date of Patent: November 27, 2012
    Assignee: Kemira Chemical, Inc.
    Inventors: Terrence Cotter, Scott W. Rosencrance, Robert Wilson
  • Publication number: 20120264863
    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: June 29, 2012
    Publication date: October 18, 2012
    Applicant: Kemira Chemicals, Inc.
    Inventors: James Martin, Robert Wilson, Scott Rosencrance, David Previs
  • Patent number: 8287690
    Abstract: The present invention provides methods for deinking printed waster 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 18, 2011
    Date of Patent: October 16, 2012
    Assignee: Kemira Chemicals, Inc.
    Inventors: Scott Rosencrance, Charles M. Ngome, Kevin M. Hale
  • Patent number: 8236889
    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: Grant
    Filed: May 15, 2009
    Date of Patent: August 7, 2012
    Assignee: Kemira Chemicals, Inc.
    Inventors: James Martin, Robert Wilson, Scott Rosencrance, David Previs
  • Publication number: 20120032093
    Abstract: Scale inhibitor compositions and methods of inhibiting scale formation generally include a tagged scale inhibiting (co)polymer including at least one scale inhibiting moiety and an imidazole moiety. The imidazole moiety fluoresces at a wavelength of about 424 nm and can be used to detect the amount of scale inhibitor present.
    Type: Application
    Filed: August 3, 2010
    Publication date: February 9, 2012
    Applicant: KEMIRA CHEMICALS INC.
    Inventors: Lucas Moore, Laura Clapp
  • Patent number: 8097125
    Abstract: The invention relates to a composition comprising a (a) a temporary wet strength agent component capable of forming hemi-acetal bonds with the fibers of a tissue web to provide initial wet strength, subsequent rapid degradation of the initial wet strength when the tissue web contacts water; and (b) a sizing agent component capable of imparting water-repelling properties to the tissue web; such that the strength agent component and the sizing agent component are present in sufficient amounts so that when the composition is added to a tissue pulp slurry during a tissue-making process, tissue made from the tissue-making process exhibits a combination of (i) improved initial wet tensile, (ii) improved decay, and (iii) absorbency.
    Type: Grant
    Filed: September 26, 2005
    Date of Patent: January 17, 2012
    Assignee: Kemira Chemicals, Inc.
    Inventors: Michael Ryan, David Dauplaise, William Brevard
  • Publication number: 20110220308
    Abstract: A paper adhesive composition includes a cationic non-crosslinked acidified solution of a polyamidoamine with the repeating units wherein n?1; m=1 or 2; X?m is chloride, bromide, iodide, sulfate, bisulfate, nitrate, oxalate, alkyl carboxylate, aryl carboxylate, hydrogen phosphate, dihydrogen phosphate, alkyl sulfonate, aryl sulfonate, or a combination comprising at least one of the foregoing anions; R1 is a divalent aliphatic, cycloaliphatic, or araliphatic group having from 1 to 24 carbon atoms; R2 is hydrogen or a monovalent aliphatic, cycloaliphatic, or araliphatic group having from 1 to 24 carbon atoms; and R3 is a divalent hydrocarbon radical derived from a dibasic carboxylic acid. Also disclosed are methods of creping paper with the composition.
    Type: Application
    Filed: May 27, 2011
    Publication date: September 15, 2011
    Applicant: KEMIRA CHEMICALS, INC.
    Inventor: Clayton J. Campbell
  • Publication number: 20110174454
    Abstract: A method for making an opacity relevant grade paper or paperboard product, such as a communication type paper used for printing and writing applications, utilizes an effective amount of quaternized alkanolamine fatty acid ester compounds as an opacification aid to control the optical properties of the paper or paperboard product as a wet-end additive to a papermaking operation. Using the quaternized alkanolamine fatty acid ester compound can improve the opacity of the paper or paperboard product, maintain the opacity of the paper while reducing the use of other opacification aids, such as inorganic fillers and/or pigments, and allow for a reduction in paper grammage without a compromise in opacity. The improvements in paper optical properties are achieved without adversely affecting other characteristics of the paper product such as bulk value, tensile strength, tear index, and the like.
    Type: Application
    Filed: March 22, 2011
    Publication date: July 21, 2011
    Applicant: KEMIRA CHEMICALS, INC.
    Inventors: Brian N. Brogdon, Gary M. Freeman, Thomas C. Friel, Scott W. Rosencrance
  • Publication number: 20110155334
    Abstract: The present invention provides methods for deinking printed waster 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 18, 2011
    Publication date: June 30, 2011
    Applicant: KEMIRA CHEMICAL, INC.
    Inventors: Scott Rosencrance, Charles M. Ngome, Kevin M. Hale
  • Publication number: 20110108221
    Abstract: The present invention relates to cost-effective and environmentally friendly polyester surfactants for use in flotation deinking. 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 concentration values.
    Type: Application
    Filed: November 11, 2009
    Publication date: May 12, 2011
    Applicant: Kemira Chemicals, Inc.
    Inventors: Terrence Cotter, Scott W. Rosencrance, Robert Wilson