Patents by Inventor Keith Whiston

Keith Whiston has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10143999
    Abstract: Disclosed are nickel-containing complexation precursors having high complexation activity for bidentate phosphite ligands. Also disclosed are methods of making the complexation precursors. The disclosed method of generating the nickel-containing complexation precursor includes including contacting a nickel starting material with a reductant under conditions sufficient to generate a nickel-containing complexation precursor having at least about 1,500 ppmw sulfur in the form of sulfide.
    Type: Grant
    Filed: November 11, 2015
    Date of Patent: December 4, 2018
    Assignee: INVISTA NORTH AMERICA S.A R.L.
    Inventors: Joan Fraga-Dubreuil, Vinay Medhekar, John A. Turner, Keith Whiston
  • Patent number: 9981257
    Abstract: As described herein, nickel treated with sulfur provides a surprisingly effective source of nickel atoms for generating nickel-phosphorus-containing ligand complexes useful as hydrocyanation catalysts.
    Type: Grant
    Filed: June 6, 2012
    Date of Patent: May 29, 2018
    Assignee: INVISTA North America S.a.r.l.
    Inventors: Joan Fraga-Dubreuil, Vinay Medhekar, Thomas A. Micka, Keith Whiston, John J. Ostermaier, Colin S. Slaten
  • Publication number: 20170333879
    Abstract: Disclosed are nickel-containing complexation precursors having high complexation activity for bidentate processed under various conditions phosphite ligands. Also disclosed are methods of making the complexation precursors. The disclosed method of generating the nickel-containing complexation precursor includes including contacting a nickel starting material with a reductant under conditions sufficient to generate a nickel-containing complexation precursor having at least about 1,500 ppmw sulfur in the form of sulfide.
    Type: Application
    Filed: November 11, 2015
    Publication date: November 23, 2017
    Applicant: INVISTA NORTH AMERICA S.A R.L.
    Inventors: Joan FRAGA-DUBREUIL, Vinay MEDHEKAR, John A. TURNER, Keith WHISTON
  • Patent number: 9687836
    Abstract: A novel nickel particulate form is provided that efficiently forms a zero-valent nickel complex with a phosphorus-containing ligands in an organic liquid to form a hydrocyanation catalyst. Particles in the nickel particulate form comprise nickel crystallites. For example, the nickel particulate form can have a BET Specific Surface Area of at least about 1 m2/gm; an average crystallite size less than about 20-25 nm, the nickel particulate form can have at least 10% of the crystallites in the nickel form can have can have a diameter (C10) of less than about 10 nm, and/or there are on average at least about 1015 surface crystallites per gram nickel. A ratio of BET SSA to C50 for the nickel particulate form can be at least about 0.1×109 m/gm and preferably at least about 0.4×109 m/gm. Methods of preparation and use are also provided.
    Type: Grant
    Filed: March 26, 2015
    Date of Patent: June 27, 2017
    Assignee: INVISTA North America S.a r.l.
    Inventors: Joan Fraga-Dubreuil, Vinay Medhekar, Thomas A. Micka, Keith Whiston
  • Patent number: 9221852
    Abstract: Claimed is a process for producing a phosphorus-containing ligand, preferably a diphosphite ligand structure (DLS) such as structure I. The method includes contacting a phosphorochloridite (structure II) with a compound having the structure X—OH (which can be a bisaryl compound), and a tertiary organic amine to provide structure I? and as preferred embodiment structure I.
    Type: Grant
    Filed: October 15, 2012
    Date of Patent: December 29, 2015
    Assignee: INVISTA North America S.a.r.l.
    Inventors: Stewart Forsyth, John Arthur Turner, Keith Whiston, Thomas E Vos
  • Publication number: 20150196900
    Abstract: A novel nickel particulate form is provided that efficiently forms a zero-valent nickel complex with a phosphorus-containing ligands in an organic liquid to form a hydrocyanation catalyst. Particles in the nickel particulate form comprise nickel crystallites. For example, the nickel particulate form can have a BET Specific Surface Area of at least about 1 m2/gm; an average crystallite size less than about 20-25 nm, the nickel particulate form can have at least 10% of the crystallites in the nickel form can have can have a diameter (C10) of less than about 10 nm, and/or there are on average at least about 1015 surface crystallites per gram nickel. A ratio of BET SSA to C50 for the nickel particulate form can be at least about 0.1×109 m/gm and preferably at least about 0.4×109 m/gm. Methods of preparation and use are also provided.
    Type: Application
    Filed: March 26, 2015
    Publication date: July 16, 2015
    Applicant: INVISTA North America S.a.r.l.
    Inventors: Joan FRAGA-DUBREUIL, Vinay MEDHEKAR, Thomas A. MICKA, Keith WHISTON
  • Patent number: 9050591
    Abstract: A novel nickel particulate form is provided that efficiently forms a zero-valent nickel complex with a phosphorus-containing ligands in an organic liquid to form a hydrocyanation catalyst. Particles in the nickel particulate form comprise nickel crystallites. For example, the nickel particulate form can have a BET Specific Surface Area of at least about 1 m2/gm; an average crystallite size less than about 20-25 nm, the nickel particulate form can have at least 10% of the crystallites in the nickel form can have a diameter (C10) of less than about 10 nm, and/or there are on average at least about 1015 surface crystallites per gram nickel. A ratio of BET SSA to C50 for the nickel particulate form can be at least about 0.1×109 m/gm and preferably at least about 0.4×109 m/gm. Methods of preparation and use are also provided.
    Type: Grant
    Filed: June 6, 2012
    Date of Patent: June 9, 2015
    Assignee: INVISTA North America S.a.r.l.
    Inventors: Joan Fraga-Dubreuil, Vinay Medhekar, Thomas A. Micka, Keith Whiston
  • Publication number: 20150011797
    Abstract: The present invention relates to a process for the oxidation of cycloalkanes utilising a supported gold and palladium catalyst and the use of the supported gold and palladium catalyst for the oxidation of cycloalkanes. Also described is a process for the preparation of the supported catalyst.
    Type: Application
    Filed: February 1, 2013
    Publication date: January 8, 2015
    Applicant: INVISTA NORTH AMERICA S.A R.L.
    Inventors: Keith Whiston, Xi Liu, Graham Hutchings
  • Publication number: 20140343313
    Abstract: Claimed is a process for producing a phosphorus-containing ligand, preferably a diphosphite ligand structure (DLS) such as structure I. The method includes contacting a phosphorochloridite (structure II) with a compound having the structure X—OH (which can be a bisaryl compound), and a tertiary organic amine to provide structure I? and as preferred embodiment structure I.
    Type: Application
    Filed: October 15, 2012
    Publication date: November 20, 2014
    Applicant: INVISTA North America S.a r.l.
    Inventors: Stewart Forsyth, John Arthur Turner, Keith Whiston, Thomas E. Voss
  • Patent number: 8772438
    Abstract: A process for making a polyamide polymer, said process comprising heating, in one or more ionic liquid(s), one or more polyamide precursor(s) selected from: (i) one or more free dicarboxylic acid(s) or ester(s) thereof, with one or more diamine(s); or (ii) one or more salt(s) of a dicarboxylic acid with a diamine; or (iii) one or more lactam(s); or (iv) mixtures of any of the foregoing precursors (i) to (iii).
    Type: Grant
    Filed: June 30, 2010
    Date of Patent: July 8, 2014
    Assignee: Invista North America S.är.l.
    Inventors: Keith Whiston, Charles Richard Langrick, Kenneth Richard Seddon, Alberto V. Puga
  • Patent number: 8686134
    Abstract: The invention relates to an ionic liquid composition and a method for preparing the ionic liquid. The ionic liquid comprises a cation containing the Formula I, as herein disclosed, and wherein: n is 2, R1 is selected from the group consisting of: H, C1-C12 alkyl, aryl or together with R2 may form a heterocyclic ring, and R2 is selected from the group consisting of: H, C1-C12 alkyl, aryl or together with R1 may form a heterocyclic ring, and R3 is selected from the group consisting of hydrogen and C1-C12 alkyl, and wherein R1 and R2 are not simultaneously selected from hydrogen.
    Type: Grant
    Filed: July 20, 2011
    Date of Patent: April 1, 2014
    Assignee: Invista North America S.A R.L.
    Inventors: Stewart Forsyth, Kenneth Richard Seddon, Keith Whiston
  • Publication number: 20130299738
    Abstract: The invention relates to the use of an N2O-containing ionic liquid as a reagent in a chemical reaction, for example as an oxidising agent.
    Type: Application
    Filed: November 18, 2011
    Publication date: November 14, 2013
    Applicant: INVISTA NORTH AMERICA S.A.R.L.
    Inventors: Sudhir Aki, Keith Whiston, Tayeb Belhocine, Kenneth Richard Seddon
  • Publication number: 20130144082
    Abstract: A novel nickel particulate form is provided that efficiently forms a zero-valent nickel complex with a phosphorus-containing ligands in an organic liquid to form a hydrocyanation catalyst. Particles in the nickel particulate form comprise nickel crystallites. For example, the nickel particulate form can have a BET Specific Surface Area of at least about 1 m2/gm; an average crystallite size less than about 20-25 nm, the nickel particulate form can have at least 10% of the crystallites in the nickel form can have can have a diameter (C10) of less than about 10 nm, and/or there are on average at least about 1015 surface crystallites per gram nickel. A ratio of BET SSA to C50 for the nickel particulate form can be at least about 0.1×109 m/gm and preferably at least about 0.4×109 m/gm. Methods of preparation and use are also provided.
    Type: Application
    Filed: June 6, 2012
    Publication date: June 6, 2013
    Applicant: INVISTA North America S.a r.l.
    Inventors: Joan Fraga-Dubreuil, Vinay Medhekar, Thomas A. Micka, Keith Whiston
  • Publication number: 20130143730
    Abstract: As described herein, nickel treated with sulfur provides a surprisingly effective source of nickel atoms for generating nickel-phosphorus-containing ligand complexes useful as hydrocyanation catalysts.
    Type: Application
    Filed: June 6, 2012
    Publication date: June 6, 2013
    Applicant: INVISTA North America S.a.r.l.
    Inventors: JOAN FRAGA-DUBREUIL, Vinay Medhekar, Thomas A. Micka, Keith Whiston
  • Patent number: 8345407
    Abstract: Disclosed is an ionic liquid: wherein: n is 1 or 2; R1 is selected from H and (C1-C6)alkyl; R2 is selected from —(CH2)wO[(CH2)xO(CH2)y]m(CH2)zCH3 and wherein w is 1 to 6, x is 1 to 6, y is 0 to 6, z is 0 to 6, m is 0 to 3 and [w+m(x+y)+z] is less than or equal to 12; and R3 is selected from H and methyl, wherein if n is 1 then R3 is methyl, and if n is 2 then R3 is H. Also disclosed are electrochemical devices and devices employing such electrochemical devices as energy sources.
    Type: Grant
    Filed: February 8, 2011
    Date of Patent: January 1, 2013
    Assignee: Invista North America S.A R.L.
    Inventors: Kenneth Richard Seddon, Tayeb Belhocine, Alberto V. Puga, Keith Whiston
  • Publication number: 20120264907
    Abstract: A process for making a polyamide polymer, said process comprising heating, in one or more ionic liquid(s), one or more polyamide precursor(s) selected from: (i) one or more free dicarboxylic acid(s) or ester(s) thereof, with one or more diamine(s); or (ii) one or more salt(s) of a dicarboxylic acid with a diamine; or (iii) one or more lactam(s); or (iv) mixtures of any of the foregoing precursors (i) to (iii).
    Type: Application
    Filed: June 30, 2010
    Publication date: October 18, 2012
    Applicant: INVISTA North America S.a.r.l.
    Inventors: Keith Whiston, Charles Richard Langrick, Kenneth Richard Seddon, Alberto V. Puga
  • Publication number: 20120190844
    Abstract: The invention relates to an ionic liquid composition and a method for preparing the ionic liquid. The ionic liquid comprises a cation containing the Formula I, as herein disclosed, and wherein: n is 2, R1 is selected from the group consisting of: H, C1-C12 alkyl, aryl or together with R2 may form a heterocyclic ring, and R2 is selected from the group consisting of: H, C1-C12 alkyl, aryl or together with R1 may form a heterocyclic ring, and R3 is selected from the group consisting of hydrogen and C1-C12 alkyl, and wherein R1 and R2 are not simultaneously selected from hydrogen.
    Type: Application
    Filed: July 20, 2011
    Publication date: July 26, 2012
    Applicant: INVISTA North America S.a r.l.
    Inventors: Stewart Forsyth, Kenneth Richard Seddon, Keith Whiston
  • Publication number: 20120050945
    Abstract: Disclosed is an ionic liquid: wherein: n is 1 or 2; R1 is selected from H and (C1-C6)alkyl; R2 is selected from —(CH2)wO[(CH2)xO(CH2)y]m(CH2)zCH3 and wherein w is 1 to 6, x is 1 to 6, y is 0 to 6, z is 0 to 6, m is 0 to 3 and [w+m(x+y)+z] is less than or equal to 12; and R3 is selected from H and methyl, wherein if n is 1 then R3 is methyl, and if n is 2 then R3 is H. Also disclosed are electrochemical devices and devices employing such electrochemical devices as energy sources.
    Type: Application
    Filed: February 8, 2011
    Publication date: March 1, 2012
    Applicant: INVISTA NORTH AMERICA S.A R.L.
    Inventors: Kenneth Richard Seddon, Tayeb Belhocine, Alberto V. Puga, Keith Whiston
  • Patent number: 8088917
    Abstract: The invention relates to an ionic liquid composition and a method for preparing the ionic liquid. The ionic liquid comprises a cation containing the Formula I, as herein disclosed, and wherein: n is 2, R1 is selected from the group consisting of: H, C1-C12 alkyl, aryl or together with R2 may form a heterocyclic ring, and R2 is selected from the group consisting of: H, C1-C12 alkyl, aryl or together with R1 may form a heterocyclic ring, and R3 is selected from the group consisting of hydrogen and C1-C12 alkyl, and wherein R1 and R2 are not simultaneously selected from hydrogen.
    Type: Grant
    Filed: May 29, 2008
    Date of Patent: January 3, 2012
    Assignee: Invista North America S.A R.L.
    Inventors: Stewart Forsyth, Kenneth R. Seddon, Keith Whiston, Sudhir Aki
  • Patent number: 7772293
    Abstract: An improved process for the hydrolysis of nylon polymer is herein disclosed using ionic liquids and optionally one equivalent of sulfuric acid per amide residue of the polymer. The process provides for a simplified means for separation of the hydrolyzed polyamide constituent monomers.
    Type: Grant
    Filed: July 30, 2008
    Date of Patent: August 10, 2010
    Assignee: Invista North America S.A.R.L.
    Inventors: Keith Whiston, Stewart Forsyth, Kenneth R. Seddon