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).
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Patent number: 10143999Abstract: 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: GrantFiled: November 11, 2015Date of Patent: December 4, 2018Assignee: INVISTA NORTH AMERICA S.A R.L.Inventors: Joan Fraga-Dubreuil, Vinay Medhekar, John A. Turner, Keith Whiston
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Patent number: 9981257Abstract: 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: GrantFiled: June 6, 2012Date of Patent: May 29, 2018Assignee: INVISTA North America S.a.r.l.Inventors: Joan Fraga-Dubreuil, Vinay Medhekar, Thomas A. Micka, Keith Whiston, John J. Ostermaier, Colin S. Slaten
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Publication number: 20170333879Abstract: 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: ApplicationFiled: November 11, 2015Publication date: November 23, 2017Applicant: INVISTA NORTH AMERICA S.A R.L.Inventors: Joan FRAGA-DUBREUIL, Vinay MEDHEKAR, John A. TURNER, Keith WHISTON
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Patent number: 9687836Abstract: 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: GrantFiled: March 26, 2015Date of Patent: June 27, 2017Assignee: INVISTA North America S.a r.l.Inventors: Joan Fraga-Dubreuil, Vinay Medhekar, Thomas A. Micka, Keith Whiston
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Patent number: 9221852Abstract: 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: GrantFiled: October 15, 2012Date of Patent: December 29, 2015Assignee: INVISTA North America S.a.r.l.Inventors: Stewart Forsyth, John Arthur Turner, Keith Whiston, Thomas E Vos
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Publication number: 20150196900Abstract: 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: ApplicationFiled: March 26, 2015Publication date: July 16, 2015Applicant: INVISTA North America S.a.r.l.Inventors: Joan FRAGA-DUBREUIL, Vinay MEDHEKAR, Thomas A. MICKA, Keith WHISTON
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Patent number: 9050591Abstract: 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: GrantFiled: June 6, 2012Date of Patent: June 9, 2015Assignee: INVISTA North America S.a.r.l.Inventors: Joan Fraga-Dubreuil, Vinay Medhekar, Thomas A. Micka, Keith Whiston
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Publication number: 20150011797Abstract: 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: ApplicationFiled: February 1, 2013Publication date: January 8, 2015Applicant: INVISTA NORTH AMERICA S.A R.L.Inventors: Keith Whiston, Xi Liu, Graham Hutchings
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Publication number: 20140343313Abstract: 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: ApplicationFiled: October 15, 2012Publication date: November 20, 2014Applicant: INVISTA North America S.a r.l.Inventors: Stewart Forsyth, John Arthur Turner, Keith Whiston, Thomas E. Voss
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Patent number: 8772438Abstract: 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: GrantFiled: June 30, 2010Date of Patent: July 8, 2014Assignee: Invista North America S.är.l.Inventors: Keith Whiston, Charles Richard Langrick, Kenneth Richard Seddon, Alberto V. Puga
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Patent number: 8686134Abstract: 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: GrantFiled: July 20, 2011Date of Patent: April 1, 2014Assignee: Invista North America S.A R.L.Inventors: Stewart Forsyth, Kenneth Richard Seddon, Keith Whiston
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Publication number: 20130299738Abstract: 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: ApplicationFiled: November 18, 2011Publication date: November 14, 2013Applicant: INVISTA NORTH AMERICA S.A.R.L.Inventors: Sudhir Aki, Keith Whiston, Tayeb Belhocine, Kenneth Richard Seddon
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Publication number: 20130144082Abstract: 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: ApplicationFiled: June 6, 2012Publication date: June 6, 2013Applicant: INVISTA North America S.a r.l.Inventors: Joan Fraga-Dubreuil, Vinay Medhekar, Thomas A. Micka, Keith Whiston
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Publication number: 20130143730Abstract: 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: ApplicationFiled: June 6, 2012Publication date: June 6, 2013Applicant: INVISTA North America S.a.r.l.Inventors: JOAN FRAGA-DUBREUIL, Vinay Medhekar, Thomas A. Micka, Keith Whiston
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Patent number: 8345407Abstract: 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: GrantFiled: February 8, 2011Date of Patent: January 1, 2013Assignee: Invista North America S.A R.L.Inventors: Kenneth Richard Seddon, Tayeb Belhocine, Alberto V. Puga, Keith Whiston
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Publication number: 20120264907Abstract: 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: ApplicationFiled: June 30, 2010Publication date: October 18, 2012Applicant: INVISTA North America S.a.r.l.Inventors: Keith Whiston, Charles Richard Langrick, Kenneth Richard Seddon, Alberto V. Puga
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Publication number: 20120190844Abstract: 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: ApplicationFiled: July 20, 2011Publication date: July 26, 2012Applicant: INVISTA North America S.a r.l.Inventors: Stewart Forsyth, Kenneth Richard Seddon, Keith Whiston
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Publication number: 20120050945Abstract: 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: ApplicationFiled: February 8, 2011Publication date: March 1, 2012Applicant: INVISTA NORTH AMERICA S.A R.L.Inventors: Kenneth Richard Seddon, Tayeb Belhocine, Alberto V. Puga, Keith Whiston
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Patent number: 8088917Abstract: 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: GrantFiled: May 29, 2008Date of Patent: January 3, 2012Assignee: Invista North America S.A R.L.Inventors: Stewart Forsyth, Kenneth R. Seddon, Keith Whiston, Sudhir Aki
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Patent number: 7772293Abstract: 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: GrantFiled: July 30, 2008Date of Patent: August 10, 2010Assignee: Invista North America S.A.R.L.Inventors: Keith Whiston, Stewart Forsyth, Kenneth R. Seddon