Patents by Inventor Namal De Silva
Namal De Silva 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: 12018221Abstract: Provided herein are systems and methods for converting CO2 and a reduction gas such as H2 or a hydrocarbon to mixtures of paraffins and aromatics suitable for use as aviation fuel.Type: GrantFiled: November 20, 2023Date of Patent: June 25, 2024Assignee: Air Company Holdings, Inc.Inventors: Lubo Zhou, Chi Chen, Qiyuan Wu, Stafford W. Sheehan, Namal de Silva, Mahluli Moyo, Jihad Dakka, David DeVilliers, Gregory Constantine, Mark Rumizen
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Publication number: 20240124792Abstract: Provided herein are systems and methods for converting CO2 and a reduction gas such as H2 or a hydrocarbon to mixtures of paraffins and aromatics suitable for use as aviation fuel.Type: ApplicationFiled: November 20, 2023Publication date: April 18, 2024Inventors: Lubo Zhou, Chi Chen, Qiyuan Wu, Stafford W. Sheehan, Namal de Silva, Mahluli Moyo, Jihad Dakka, David DeVilliers
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Publication number: 20240001351Abstract: Disclosed herein in certain embodiments is a fluid catalyst cracking (FCC) additive composition that includes a first component, a second component, and optionally a third component. The first component includes beta zeolite and a first matrix. The second component includes ZSM-5 zeolite and a second matrix. The third component includes Y zeolite and a third matrix. The components are present in the additive composition in a range that provides for enhanced butylenes to propylene selectivity ratio and total butylenes yield when catalytically cracking a hydrocarbon feed.Type: ApplicationFiled: November 19, 2021Publication date: January 4, 2024Inventors: Bilge YILMAZ, Vasileios KOMVOKIS, Wathudura Indika Namal DE SILVA, Xingtao GAO
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Publication number: 20230294083Abstract: Disclosed herein is a fluid catalyst cracking (FCC) catalyst composition that includes a first component and a second component. The first component includes zeolite Y and a first matrix that includes a metal passivating constituent. The second component includes beta zeolite and a second matrix. Also disclosed herein are methods of preparing the FCC catalyst composition and method of using the FCC catalyst composition.Type: ApplicationFiled: August 18, 2021Publication date: September 21, 2023Inventors: Wathudura Indika Namal DE SILVA, David M. STOCKWELL, Gary M. SMITH, Vasileios KOMVOKIS, Bilge YILMAZ
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Publication number: 20230192573Abstract: Disclosed herein is a fluid catalyst cracking (FCC) catalyst composition that includes a first component and a second component. The first component and second component may be separate microspheroidal FCC catalysts or may be incorporated in a common microspheroidal FCC catalyst. The first component includes zeolite Y and a first matrix that includes gamma-alumina. The second component includes beta zeolite and a second matrix. Also disclosed herein are methods of preparing the FCC catalyst composition and method of using the FCC catalyst composition.Type: ApplicationFiled: July 30, 2021Publication date: June 22, 2023Inventors: Wathudura Indika Namal DE SILVA, David M. STOCKWELL, Bilge YILMAZ, Junmei WEI
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Publication number: 20220370979Abstract: The present technology provides an adsorbent material that includes a silicate composition, wherein the silicate composition includes a crystalline phase; wherein the silicate composition may have an interconnected porous scaffold having a total mercury (Hg) pore volume of about 0.005 cc/g to about 0.25 cc/g for pores having a diameter of about 20-10,000 ? and a total nitrogen (N) pore volume of about 0.02 cc/g to about 0.1 cc/g for pores having a diameter of about 20-600 ?.Type: ApplicationFiled: November 2, 2020Publication date: November 24, 2022Inventors: Wathudura Indika Namal De Silva, Ismail Yildirim, Michael B. Sigman, Bilge Yilmaz
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Patent number: 10227623Abstract: A process for mechanical destructuring of cellulosic biomass was developed that makes use of a short application of high compression, impact, and shearing forces. The biomass may be destructured using a specific energy input that is less than 40% of the total combustible energy of the biomass. The destructured biomass, with or without saccharification and/or in-feed glycosyl hydrolase enzymes, may be used in feed applications.Type: GrantFiled: November 18, 2014Date of Patent: March 12, 2019Assignee: E I DU PONT DE NEMOURS AND COMPANYInventors: Wathudura Indika Namal De Silva, Paul Joseph Fagan, F Glenn Gallagher, Zheng-Zheng Huang, Guangliang Gary Liu, Aaron Perelman, Luis Fernando Romero Millan, Anton Shpilsky, Daniel A Slanac, Maria Walsh
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Patent number: 9670118Abstract: 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: October 7, 2015Date of Patent: June 6, 2017Assignee: E I DU PONT DE NEMOURS AND COMPANYInventors: Alan Martin Allgeier, Torren Ryan Carlson, David Richard Corbin, Wathudura Indika Namal De Silva, Carl Andrew Menning, Joachim C Ritter, Sourav Kumar Sengupta
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Patent number: 9441072Abstract: The invention provides complexes in which ligands (e.g., calixarene-related compounds) are coordinated to a metal colloid, e.g. a gold colloid. In exemplary embodiments, two or more ligands complexed to the metal colloid are larger than the metal colloid, thus providing an accessible metal center. The complexes can be immobilized on a substrate. The complexes of the invention are useful as tunable and highly robust isolated metal colloids that find use in binding of molecules and catalysis of chemical reactions.Type: GrantFiled: November 5, 2010Date of Patent: September 13, 2016Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIAInventors: Alexander Katz, Namal De Silva, Andrew Solovyov, Jeong-Myeong Ha
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Patent number: 9295983Abstract: The invention provides complexes in which a calixarene-related compound is coordinated to an iridium-containing metal colloid. The complexes can be immobilized on a substrate. The complexes of the invention are useful as tunable and highly robust isolated metal colloids that find use in binding of molecules and catalysis of chemical reactions.Type: GrantFiled: December 23, 2014Date of Patent: March 29, 2016Assignees: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA, CHEVRON U.S.A. INC.Inventors: Alexander Katz, Namal De Silva, Andrew Solovyov, Alexander Kuperman, Cong-Yan Chen, Partha Nandi, Alexander Okrut, Igor Busygin
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Publication number: 20160023975Abstract: 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: October 7, 2015Publication date: January 28, 2016Inventors: Alan Martin Allgeier, TORREN RYAN CARLSON, DAVID RICHARD CORBIN, WATHUDURA INDIKA NAMAL DE SILVA, CARL ANDREW MENNING, JOACHIM C RITTER, SOURAV KUMAR SENGUPTA
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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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Publication number: 20150238949Abstract: The invention provides complexes in which a calixarene-related compound is coordinated to an iridium-containing metal colloid. The complexes can be immobilized on a substrate. The complexes of the invention are useful as tunable and highly robust isolated metal colloids that find use in binding of molecules and catalysis of chemical reactions.Type: ApplicationFiled: December 23, 2014Publication date: August 27, 2015Inventors: Alexander Katz, Namal De Silva, Andrew Solovyov, Alexander Kuperman, Cong-Yan Chen, Partha Nandi, Alexander Okrut, Igor Busygin
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Publication number: 20150147311Abstract: A process for mechanical destructuring of cellulosic biomass was developed that makes use of a short application of high compression, impact, and shearing forces. The biomass may be destructured using a specific energy input that is less than 40% of the total combustible energy of the biomass. The destructured biomass, with or without saccharification and/or in-feed glycosyl hydrolase enzymes, may be used in feed applications.Type: ApplicationFiled: November 18, 2014Publication date: May 28, 2015Inventors: Wathudura Indika Namal De Silva, Paul Joseph Fagan, F. Glenn Gallagher, Zheng-Zheng Huang, Guangliang Gary Liu, Aaron Perelman, Luis Fernando Romero Millan, Anton Shpilsky, Daniel A. Slanac, Maria Walsh
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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: 8969607Abstract: The invention provides complexes in which a calixarene-related compound is coordinated to an iridium-containing metal colloid. The complexes can be immobilized on a substrate. The complexes of the invention are useful as tunable and highly robust isolated metal colloids that find use in binding of molecules and catalysis of chemical reactions.Type: GrantFiled: October 22, 2010Date of Patent: March 3, 2015Assignees: The Regents of the University of California, Chevron U.S.A., Inc.Inventors: Alexander Katz, Namal De Silva, Andrew Solovyov, Alexander Kuperman, Cong-Yan Chen, Partha Nandi, Alexander Okrut, Igor Busygin
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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: 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