Patents by Inventor Ekaterini Korovessi
Ekaterini Korovessi 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: 9181157Abstract: Disclosed herein are processes for preparing an ?,?-Cn-diol, wherein n is 5 or greater, from a feedstock comprising a Cn oxygenate. In one embodiment, the process comprises contacting the feedstock with hydrogen gas in the presence of a catalyst comprising Pt, Cu, Ni, Pd, Pt, Rh, Ir, Ru, or Fe on a WO3 or WOx support. In one embodiment, the process comprises contacting the feedstock with hydrogen in the presence of a catalyst comprising a metal M1 and a metal M2 or an oxide of M2, and optionally a support. In one embodiment, M1 is Pd, Pt, or Ir; and M2 is Mo, W, V, Mn, Re, Zr, Ni, Cu, Zn, Cr, Ge, Sn, Ti, Au, or Co. The Cn oxygenate may be obtained from a biorenewable resource.Type: GrantFiled: December 12, 2014Date of Patent: November 10, 2015Assignee: E I DU PONT DE NEMOURS AND COMPANYInventors: Alan Martin Allgeier, Torren Ryan Carlson, David Richard Corbin, Wathudura Indika Namal De Silva, Ekaterini Korovessi, Carl Andrew Menning, Joachim C Ritter, Sourav Kumar Sengupta
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Patent number: 9018423Abstract: Disclosed herein are processes for preparing an ?,?-Cn-diol, wherein n is 5 or greater, from a feedstock comprising a Cn oxygenate. In one embodiment, the process comprises contacting the feedstock with hydrogen gas in the presence of a catalyst comprising Pt, Cu, Ni, Pd, Pt, Rh, Ir, Ru, or Fe on a WO3 or WOx support. In one embodiment, the process comprises contacting the feedstock with hydrogen in the presence of a catalyst comprising a metal M1 and a metal M2 or an oxide of M2, and optionally a support. In one embodiment, M1 is Pd, Pt, or Ir; and M2 is Mo, W, V, Mn, Re, Zr, Ni, Cu, Zn, Cr, Ge, Sn, Ti, Au, or Co. The Cn oxygenate may be obtained from a biorenewable resource.Type: GrantFiled: April 25, 2013Date of Patent: April 28, 2015Assignee: E I du Pont de Nemours and CompanyInventors: Alan Martin Allgeier, Torren Ryan Carlson, David Richard Corbin, Wathudura Indika Namal De Silva, Ekaterini Korovessi, Carl Andrew Menning, Joachim C Ritter, H David Rosenfeld, Sourav Kumar Sengupta
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Publication number: 20150099903Abstract: Disclosed herein are processes for preparing an ?,?-Cn-diol, wherein n is 5 or greater, from a feedstock comprising a Cn oxygenate. In one embodiment, the process comprises contacting the feedstock with hydrogen gas in the presence of a catalyst comprising Pt, Cu, Ni, Pd, Pt, Rh, Ir, Ru, or Fe on a WO3 or WOx support. In one embodiment, the process comprises contacting the feedstock with hydrogen in the presence of a catalyst comprising a metal M1 and a metal M2 or an oxide of M2, and optionally a support. In one embodiment, M1 is Pd, Pt, or Ir; and M2 is Mo, W, V, Mn, Re, Zr, Ni, Cu, Zn, Cr, Ge, Sn, Ti, Au, or Co. The Cn oxygenate may be obtained from a biorenewable resource.Type: ApplicationFiled: December 12, 2014Publication date: April 9, 2015Inventors: ALAN MARTIN ALLGEIER, Torren Ryan Carlson, David Richard Corbin, Wathudura Indika Namal De Silva, Ekaterini Korovessi, Carl Andrew Menning, Joachim C. Ritter, Sourav Kumar Sengupta
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Patent number: 8981130Abstract: Disclosed are processes for preparing 1,2-cyclohexanediol, and mixtures of 1,2-cyclohexanediol and 1,6-hexanediol, by hydrogenating 1,2,6-hexanetriol.Type: GrantFiled: December 28, 2012Date of Patent: March 17, 2015Assignee: E I Du Pont de Nemours and CompanyInventors: Wathudura Indika Namal de Silva, Ekaterini Korovessi, Carl Andrew Menning, Joseph E Murphy, Joachim C Ritter, Sourav Kumar Sengupta
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Patent number: 8962894Abstract: Disclosed are processes for preparing 1,6-hexanediol and synthetic intermediates useful in the production of 1,6-hexanediol from renewable biosources. In one embodiment, a process comprises contacting levoglucosenone with hydrogen in the presence of a first hydrogenation catalyst at a first temperature to form product mixture (I); and heating product mixture (I) in the presence of hydrogen and a second hydrogenation catalyst at a second temperature to form product mixture (II) which comprises 1,6-hexanediol.Type: GrantFiled: December 28, 2012Date of Patent: February 24, 2015Assignee: E I du Pont de Nemours and CompanyInventors: Alan Martin Allgeier, Wathudura Indika Namal De Silva, Ekaterini Korovessi, Carl Andrew Menning, Joachim C Ritter, Sourav Kumar Sengupta, Christina S Stauffer
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Patent number: 8889912Abstract: Disclosed are processes for preparing 1,6-hexanediol from levoglucosenone. In one embodiment, the process comprises contacting levoglucosenone with hydrogen in the presence of a hydrogenation catalyst comprising palladium, platinum/tungsten, nickel/tungsten, rhodium/rhenium, or mixtures thereof at a first temperature between about 50° C. and 100° C. and at a first reaction pressure between about 50 psi and 2000 psi for a first reaction period, and at a second temperature between about 120° C. and 250° C. and at a second pressure between about 500 psi and 2000 psi for a second reaction period to form a product mixture comprising 1,6-hexanediol, wherein the first reaction period is the amount of time in which the levoglucosenone has a conversion of at least about 95%. In one embodiment, the 1,6-hexanediol is converted to 1,6-diaminohexane.Type: GrantFiled: April 25, 2013Date of Patent: November 18, 2014Assignee: E I du Pont de Nemours and CompanyInventors: Alan Martin Allgeier, David Richard Corbin, Wathudura Indika Namal De Silva, Ekaterini Korovessi, Carl Andrew Menning, Joachim C Ritter, Sourav Kumar Sengupta
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Patent number: 8889922Abstract: Disclosed are processes for preparing 1,6-hexanediol from levoglucosenone. In one embodiment, the process comprises contacting levoglucosenone with hydrogen in the presence of a hydrogenation catalyst comprising palladium, platinum/tungsten, nickel/tungsten, rhodium/rhenium, or mixtures thereof at a first temperature between about 50° C. and 100° C. and at a first reaction pressure between about 50 psi and 2000 psi for a first reaction period, and at a second temperature between about 120° C. and 250° C. and at a second pressure between about 500 psi and 2000 psi for a second reaction period to form a product mixture comprising 1,6-hexanediol, wherein the first reaction period is the amount of time in which the levoglucosenone has a conversion of at least about 95%.Type: GrantFiled: December 28, 2012Date of Patent: November 18, 2014Assignee: E I du Pont de Nemours and CompanyInventors: Alan Martin Allgeier, David Richard Corbin, Wathudura Indika Namal De Silva, Ekaterini Korovessi, Carl Andrew Menning, Joachim C Ritter, Sourav Kumar Sengupta
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Patent number: 8884035Abstract: Disclosed herein are processes comprising contacting isosorbide with hydrogen in the presence of a first hydrogenation catalyst to form a first product mixture comprising tetrahydrofuran-2,5-dimethanol. The processes can further comprise heating the first product mixture in the presence of hydrogen and a second hydrogenation catalyst to form a second product mixture comprising 1,6-hexanediol. The first and second hydrogenation catalysts can be the same or different.Type: GrantFiled: December 28, 2012Date of Patent: November 11, 2014Assignee: E I du Pont de Nemours and CompanyInventors: Wathudura Indika Namal de Silva, Ekaterini Korovessi, Carl Andrew Menning, Joseph E Murphy, Joachim C Ritter, Sourav Kumar Sengupta, Christina S Stauffer
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Patent number: 8865940Abstract: Disclosed are processes for preparing 1,6-hexanediol and synthetic intermediates useful in the production of 1,6-hexanediol from renewable biosources. In one embodiment, a process comprises contacting levoglucosenone with hydrogen in the presence of a first hydrogenation catalyst at a first temperature to form product mixture (I); and heating product mixture (I) in the presence of hydrogen and a second hydrogenation catalyst at a second temperature to form product mixture (II) which comprises 1,6-hexanediol. In one embodiment, the 1,6-hexanediol is converted to 1,6-diaminohexane.Type: GrantFiled: April 25, 2013Date of Patent: October 21, 2014Assignee: E I du Pont de Nemours and CompanyInventors: Alan Martin Allgeier, Wathudura Indika Namal De Silva, Ekaterini Korovessi, Carl Andrew Menning, Joachim C Ritter, Sourav Kumar Sengupta, Christina S Stauffer
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Publication number: 20140228596Abstract: Disclosed are processes for preparing 1,6-hexanediol and synthetic intermediates useful in the production of 1,6-hexanediol from renewable biosources. In one embodiment, a process comprises contacting levoglucosenone with hydrogen in the presence of a first hydrogenation catalyst at a first temperature to form product mixture (I); and heating product mixture (I) in the presence of hydrogen and a second hydrogenation catalyst at a second temperature to form product mixture (II) which comprises 1,6-hexanediol. In one embodiment, the 1,6-hexanediol is converted to 1,6-diaminohexane.Type: ApplicationFiled: April 25, 2013Publication date: August 14, 2014Applicant: E I DU PONT DE NEMOURS AND COMPANYInventors: Alan Martin Allgeier, Wathudura Indika Namal de Silva, Ekaterini Korovessi, Carl Andrew Menning, Joachim C. Ritter, Sourav Kumar Sengupta, Christina S. Stauffer
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Patent number: 8753853Abstract: This invention provides a process of making a linear dicarboxylic acid of C10, C12, C14, C16 or C18 chain length, the process comprising providing a feed which is a renewable resource, contacting the feed with a catalyst in the presence of hydrogen and at a temperature of about 250° C. to about 425° C. and at a pressure of about 500 psig to about 2500 psig (3450 kPa to about 17,250 kPa) to produce a hydrocarbon product having at least a 5:1 ratio of even-numbered alkanes to odd-numbered alkanes and comprising a linear alkane of Cn chain length; and fermenting at least a portion of the linear alkane of Cn chain length to a linear dicarboxylic acid of Cn chain length, wherein n=10, 12, 14, 16 or 18. The catalyst comprises an oxide, molybdenum, and one or more active metals selected from the group consisting of nickel, cobalt, and mixtures thereof and the catalyst is in sulfided form.Type: GrantFiled: December 11, 2009Date of Patent: June 17, 2014Assignee: E I du Pont de Nemours and CompanyInventors: Joachim C. Ritter, Sourav Kumar Sengupta, Hasan Dindi, Robert D. Fallon, Ekaterini Korovessi, Andrew C. Eliot, John Joseph Hagedorn
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Publication number: 20130289318Abstract: Disclosed herein are processes for preparing an ?,?-Cn-diol, wherein n is 5 or greater, from a feedstock comprising a Cn oxygenate. In one embodiment, the process comprises contacting the feedstock with hydrogen gas in the presence of a catalyst comprising Pt, Cu, Ni, Pd, Pt, Rh, Ir, Ru, or Fe on a WO3 or WOx support. In one embodiment, the process comprises contacting the feedstock with hydrogen in the presence of a catalyst comprising a metal M1 and a metal M2 or an oxide of M2, and optionally a support. In one embodiment, M1 is Pd, Pt, or Ir; and M2 is Mo, W, V, Mn, Re, Zr, Ni, Cu, Zn, Cr, Ge, Sn, Ti, Au, or Co. The Cn oxygenate may be obtained from a biorenewable resource.Type: ApplicationFiled: April 25, 2013Publication date: October 31, 2013Applicant: E I DU PONT DE NEMOURS AND COMPANYInventors: Alan Martin ALLGEIER, Torren Ryan CARLSON, Wathudura Indika Namal DE SILVA, Ekaterini KOROVESSI, Carl MENNING, Joachim C. RITTER, H David ROSENFELD, Sourav Kumar SENGUPTA
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Publication number: 20130048136Abstract: Disclosed is a copolyamide including at least two repeat units selected from the group consisting of structures (I) to (IV), —C(O)(CH2)10C(O)NH(CH2)nNH—??(I); —C(O)(CH2)12C(O)NH(CH2)nNH—??(II); —C(O)(CH2)14C(O)NH(CH2)nNH—??(II); and —C(O)(CH2)16C(O)NH(CH2)nNH—??(IV); and n is an integer selected from 4, 6, 10 or 12; wherein at least one repeat unit is selected from structures (I) and (II); and any one the repeat units may be present up to about 92 mole percent. Also disclosed is a process for providing the copolyamide; and thermoplastic compositions and tubing including the copolyamides.Type: ApplicationFiled: August 28, 2012Publication date: February 28, 2013Applicant: E I DU PONT DE NEMOURS AND COMPANYInventors: EKATERINI KOROVESSI, Anna Kutty Mathew, Marvin M. Martens, Joachim C. Ritter
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Patent number: 8158830Abstract: An integrated process is provided for preparing 1,2,4,5-tetraminobenzene and salts thereof, starting in certain embodiments with nitration of 1,3-dihalobenzene. The process design eliminates costly intermediate drying and recrystallization steps. Handling of solid materials with possible skin sensitizing properties and toxicity is avoided, thereby eliminating human and environmental exposure.Type: GrantFiled: December 17, 2008Date of Patent: April 17, 2012Assignee: E. I. du Pont de Nemours and CompanyInventors: Joachim C. Ritter, Ekaterini Korovessi, Rajiv Dhawan
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Patent number: 8143450Abstract: A process is provided for preparing complexes of 1,2,4,5-tetraminobenzene with an aromatic diacid. The process design eliminates costly intermediate drying and recrystallization steps. Handling of solid materials with possible skin sensitizing properties and toxicity is avoided, thereby eliminating human and environmental exposure.Type: GrantFiled: December 18, 2008Date of Patent: March 27, 2012Assignee: E. I. du Pont de Nemours and CompanyInventors: Joachim C. Ritter, Ekaterini Korovessi, Rajiv Dhawan
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Publication number: 20110300594Abstract: This invention provides a process of making a linear dicarboxylic acid of C10, C12, C14, C16 or C18 chain length, the process comprising providing a feed which is a renewable resource, contacting the feed with a catalyst in the presence of hydrogen and at a temperature of about 250° C. to about 425° C. and at a pressure of about 500 psig to about 2500 psig (3450 kPa to about 17,250 kPa) to produce a hydrocarbon product having at least a 5:1 ratio of even-numbered alkanes to odd-numbered alkanes and comprising a linear alkane of Cn chain length; and fermenting at least a portion of the linear alkane of Cn chain length to a linear dicarboxylic acid of Cn chain length, wherein n=10, 12, 14, 16 or 18. The catalyst comprises an oxide, molybdenum, and one or more active metals selected from the group consisting of nickel, cobalt, and mixtures thereof and the catalyst is in sulfided form.Type: ApplicationFiled: December 11, 2009Publication date: December 8, 2011Applicant: E.I. Du Pont De Nemours and CompanyInventors: Joachim C. Ritter, Sourav Kumar Sengupta, Hasan Dindi, Robert D. Fallon, Ekaterini Korovessi, Andrew C. Eliot, John Joseph Hagedorn
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Publication number: 20050118691Abstract: This invention relates to a process for producing a mixture of levulinic acid esters and formic acid esters from biomass and olefins, and the composition prepared therefrom. This invention also relates to usage of the mixture of these esters as fuel additives for gasoline fuel, diesel fuel, and biofuel.Type: ApplicationFiled: April 1, 2003Publication date: June 2, 2005Inventors: Paul Fagan, Ekaterini Korovessi, Leo Manzer, Rakesh Mehta, Stuart Thomas
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Publication number: 20030233011Abstract: This invention relates to a process for producing a mixture of levulinic acid esters and formic acid esters from biomass and olefins, and the composition prepared therefrom. This invention also relates to usage of the mixture of these esters as fuel and as fuel additives for gasoline fuel, diesel fuel, and biofuel.Type: ApplicationFiled: April 1, 2003Publication date: December 18, 2003Inventors: Paul Joseph Fagan, Ekaterini Korovessi, Leo Ernest Manzer, Rakesh H. Mehta, Stuart M. Thomas