Patents by Inventor Renuka N. Ganesh
Renuka N. Ganesh 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: 8993702Abstract: This invention relates to a transition metal catalyst compound represented by the structure: wherein M is hafnium or zirconium; each X is, independently, selected from the group consisting of hydrocarbyl radicals having from 1 to 20 carbon atoms, hydrides, amides, alkoxides, sulfides, phosphides, halogens, dienes, amines, phosphines, ethers, or a combination thereof; each R1 and R3 are, independently, a C1 to C8 alkyl group; and each R2, R4, R5, R6, R7, R8, R9, R10, R11, R12, R13, and R14 are, independently, hydrogen, or a substituted or unsubstituted hydrocarbyl group having from 1 to 8 carbon atoms, provided however that at least three of the R10-R14 groups are not hydrogen, compositions thereof and methods of use thereof to prepare polymers.Type: GrantFiled: October 19, 2012Date of Patent: March 31, 2015Assignee: ExxonMobil Chemical Patents Inc.Inventors: Donna J. Crowther, Renuka N. Ganesh, Andrew G. Narvaez, Jr., Patrick Brant
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Patent number: 8940839Abstract: This invention relates to a composition comprising a multiblock polyolefin represented by the formula: PO—C(R11)(R12)—C(R13)?C(R14)—C(R15)(R16)—PO*, or isomers thereof, wherein R11, R12, R13, R14, R15, and R16, are each independently a substituted or unsubstituted C1 through C4 hydrocarbyl group or a hydrogen; PO and PO* are polyolefins; PO and PO* are each independently a substituted or unsubstituted hydrocarbyl group having 9 to 4000 carbon atoms, provided that at least one of PO and PO* are C20 or greater, said polyolefin having: 1) an internal unsaturation as shown by the 13C NMR peak at between about 128 and about 132 ppm; 2) an Mn ratio “Z”=0.1 to 10 where Z is the Mn (as determined by 13C NMR) divided by Mn (as determined according to Gel Permeation Chromotography using polystyrene standards); and 3) optionally, from 0.3(J) and 0.Type: GrantFiled: March 25, 2011Date of Patent: January 27, 2015Assignee: ExxonMobil Chemical Patents Inc.Inventors: John R. Hagadorn, Charles J. Ruff, Renuka N. Ganesh, Patrick Brant
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Patent number: 8674040Abstract: Pyridyldiamido transition metal complexes are disclosed for use in alkene polymerization to produce multimodal polyolefins.Type: GrantFiled: May 24, 2011Date of Patent: March 18, 2014Assignee: ExxonMobil Chemical Patents Inc.Inventors: John R. Hagadorn, Renuka N. Ganesh
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Patent number: 8669326Abstract: This invention relates to a process to functionalize polyolefins comprising contacting a transition metal amide catalyst with an amine (preferably a secondary amine), and one or more vinyl terminated materials, preferably one or more vinyl terminated polyolefins. This invention further relates to the amine-functionalized polyolefins produced thereby.Type: GrantFiled: March 25, 2011Date of Patent: March 11, 2014Assignee: ExxonMobil Chemical Patents Inc.Inventors: John R. Hagadorn, Donna J. Crowther, Renuka N. Ganesh, Patrick Brant
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Patent number: 8519147Abstract: This invention relates to a carbene complex of metal salt represented by the formula: [T?M(R)c]n wherein, R is a monoanionic group; c is 1 or 2; M is a Li or Mg; T is a cyclic carbene ligand; and n is selected from the group of integers comprising 1 to 24 wherein the complex has 50% or less decomposition when stored in 0.01 molar benzene at 23° C. for a period of 1 hour. This invention also relates to transition-metal-carbene complexes prepared from such carbene complexes of metal salts, where the transition-metal-carbene complex is represented by the formula: [M*(T)(L0)q(L1?)s(L2?)t]g, where M* is a transition metal from Group 6, 7, 8, 9, 10, 11 or 12, T is a cyclic carbene ligand, L0 is a neutral ligand, L1? is a monoanionic ligand, L2? is a dianionic ligand, q is 0, 1, 2, 3 or 4, s is 0, 1, 2, 3, or 4, t is 0, 1, 2, 3, or 4, g is the overall charge of the molecule. The transition-metal-carbene complexes may be used for synthesis reactions, including metathesis of olefins.Type: GrantFiled: November 3, 2010Date of Patent: August 27, 2013Assignee: ExxonMobil Chemical Patents Inc.Inventors: John R. Hagadorn, Matthew W. Holtcamp, Matthew S. Bedoya, Renuka N. Ganesh
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Patent number: 8394902Abstract: Pyridyldiamido transition metal complexes are disclosed for use in alkene polymerization.Type: GrantFiled: March 25, 2011Date of Patent: March 12, 2013Assignee: ExxonMobil Chemical Patents Inc.Inventors: John R. Hagadorn, Renuka N. Ganesh, Dmitry V. Uborsky, Ilya S. Borisov, Ivan V. Pruss, Alexander Z. Voskoboynikov
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Patent number: 8318998Abstract: This invention relates to a transition metal catalyst compound represented by the structure: wherein M is hafnium or zirconium; each X is, independently, selected from the group consisting of hydrocarbyl radicals having from 1 to 20 carbon atoms, hydrides, amides, alkoxides, sulfides, phosphides, halogens, dienes, amines, phosphines, ethers, or a combination thereof; each R1 and R3 are, independently, a C1 to C8 alkyl group; and each R2, R4, R5, R6, R7, R8, R9, R10, R11, R12, R13, and R14 are, independently, hydrogen, or a substituted or unsubstituted hydrocarbyl group having from 1 to 8 carbon atoms, provided however that at least three of the R10-R14 groups are not hydrogen, compositions thereof and methods of use thereof to prepare polymers.Type: GrantFiled: March 25, 2011Date of Patent: November 27, 2012Assignee: ExxonMobil Chemical Patents Inc.Inventors: Donna J. Crowther, Renuka N. Ganesh, Andrew G. Narvaez, Jr., Patrick Brant
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Publication number: 20120245290Abstract: This invention relates to a composition comprising a multiblock polyolefin represented by the formula: PO—C(R11)(R12)—C(R13)?C(R14)—C(R15)(R16)—PO*, or isomers thereof, wherein R11, R12, R13, R14, R15, and R16, are each independently a substituted or unsubstituted C1 through C4 hydrocarbyl group or a hydrogen; PO and PO* are polyolefins; PO and PO* are each independently a substituted or unsubstituted hydrocarbyl group having 9 to 4000 carbon atoms, provided that at least one of PO and PO* are C20 or greater, said polyolefin having: 1) an internal unsaturation as shown by the 13C NMR peak at between about 128 and about 132 ppm; 2) an Mn ratio “Z”=0.1 to 10 where Z is the Mn (as determined by 13C NMR) divided by Mn (as determined according to Gel Permeation Chromotography using polystyrene standards); and 3) optionally, from 0.3(J) and 0.Type: ApplicationFiled: March 25, 2011Publication date: September 27, 2012Inventors: John R. Hagadorn, Charles J. Ruff, Renuka N. Ganesh, Patrick Brant
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Publication number: 20120245276Abstract: This invention relates to a process to functionalize polyolefins comprising contacting a transition metal amide catalyst with an amine (preferably a secondary amine), and one or more vinyl terminated materials, preferably one or more vinyl terminated polyolefins. This invention further relates to the amine-functionalized polyolefins produced thereby.Type: ApplicationFiled: March 25, 2011Publication date: September 27, 2012Inventors: John R. Hagadorn, Donna J. Crowther, Renuka N. Ganesh, Patrick Brant
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Publication number: 20120245313Abstract: This invention relates to a transition metal catalyst compound represented by the structure: wherein M is hafnium or zirconium; each X is, independently, selected from the group consisting of hydrocarbyl radicals having from 1 to 20 carbon atoms, hydrides, amides, alkoxides, sulfides, phosphides, halogens, dienes, amines, phosphines, ethers, or a combination thereof; each R1 and R3 are, independently, a C1 to C8 alkyl group; and each R2, R4, R5, R6, R7, R8, R9, R10, R11, R12, R13, and R14 are, independently, hydrogen, or a substituted or unsubstituted hydrocarbyl group having from 1 to 8 carbon atoms, provided however that at least three of the R10-R14 groups are not hydrogen, compositions thereof and methods of use thereof to prepare polymers.Type: ApplicationFiled: March 25, 2011Publication date: September 27, 2012Inventors: Donna J. Crowther, Renuka N. Ganesh, Andrew G. Narvaez, JR., Patrick Brant
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Publication number: 20120071616Abstract: Pyridyldiamido transition metal complexes are disclosed for use in alkene polymerization.Type: ApplicationFiled: March 25, 2011Publication date: March 22, 2012Inventors: John R. Hagadorn, Renuka N. Ganesh, Dmitry V. Uborsky, Ilya S. Borisov, Ivan V. Pruss, Alexander Z. Voskoboynikov
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Patent number: 8022005Abstract: This invention relates to an activator, catalyst system, and the use thereof. In one aspect, the catalyst system includes one or more polymerization catalysts and at least one activator. The activator comprises one or more heterocyclic heteroatom containing ligands coordinated to an alumoxane, wherein the activator is a reaction product of one or more alumoxanes and one or more heterocyclic heteroatom containing compounds, the one or more heterocyclic heteroatom containing ligands represented by the formula: where Y is O, S, PH or NH; wherein each substituent X2, X3, X4, X5, X6, and X7 is independently selected from the group consisting of hydrogen, chlorine, fluorine, iodine, and bromine, provided at least one of X2, X3, X4, X5, X6 and X7 is not hydrogen when Y is NH; and wherein the ratio of the heterocyclic heteroatom containing ligand to aluminum is between about 0.01 and about 10 molar equivalents. The catalyst system may be supported or non-supported.Type: GrantFiled: November 8, 2007Date of Patent: September 20, 2011Assignee: ExxonMobil Chemical Patents Inc.Inventors: Matthew W. Holtcamp, Renuka N. Ganesh
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Publication number: 20110224391Abstract: Pyridyldiamido transition metal complexes are disclosed for use in alkene polymerization to produce multimodal polyolefins.Type: ApplicationFiled: May 24, 2011Publication date: September 15, 2011Inventors: JOHN R. HAGADORN, RENUKA N. GANESH
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Publication number: 20110112304Abstract: This invention relates to a carbene complex of metal salt represented by the formula: [T?M(R)c]n wherein, R is a monoanionic group; c is 1 or 2; M is a Li or Mg; T is a cyclic carbene ligand; and n is selected from the group of integers comprising 1 to 24 wherein the complex has 50% or less decomposition when stored in 0.01 molar benzene at 23° C. for a period of 1 hour. This invention also relates to transition-metal-carbene complexes prepared from such carbene complexes of metal salts, where the transition-metal-carbene complex is represented by the formula: [M*(T)(L0)q(L1?)s(L2?)t]g, where M* is a transition metal from Group 6, 7, 8, 9, 10, 11 or 12, T is a cyclic carbene ligand, L° is a neutral ligand, L1? is a monoanionic ligand, L2? is a dianionic ligand, q is 0, 1, 2, 3 or 4, s is 0, 1, 2, 3, or 4, t is 0, 1, 2, 3, or 4, g is the overall charge of the molecule. The transition-metal-carbene complexes may be used for synthesis reactions, including metathesis of olefins.Type: ApplicationFiled: November 3, 2010Publication date: May 12, 2011Inventors: John R. Hagadorn, Matthew W. Holtcamp, Matthew S. Bedoya, Renuka N. Ganesh
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Patent number: 7692046Abstract: A promoter can have utility in selective heterogeneous oxidation of arylalkyl hydrocarbons such as, for example, cyclohexyl benzene and/or sec-butyl benzene to form hydroperoxides. The promoter can include the product of contacting a solid support comprising a metal oxide surface and an iron compound. The solid support can include, for example, titanium dioxide and/or an iron oxide such as magnetite and can have magnetic susceptibility. A method for the oxidation of arylalkyl hydrocarbons to form hydroperoxides can include contacting 16 an arylalkyl hydrocarbon with oxygen in the presence of the promoter under catalytic oxidation conditions to form arylalkyl hydroperoxide, which can then be converted to phenol via cleavage 26. The method can include recovery 22 of the promoter from the arylalkyl hydroperoxide and can further include recycling the recovered promoter to the contacting 16. Where the solid support has magnetic susceptibility, the recovery 22 can include magnetic separation of the promoter.Type: GrantFiled: June 21, 2007Date of Patent: April 6, 2010Assignee: ExxonMobil Chemical Patents Inc.Inventors: Matthew W. Holtcamp, Renuka N. Ganesh, Tan-Jen Chen, Jihad M. Dakka
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Patent number: 7648940Abstract: This invention relates to a catalyst composition of the formula: where Z—O is a support material, where O is oxygen, preferably Z is Si, Ti, Al, Sn, Fe, Ga, Zr, B, Mg, or Cr; each X is, independently, N, O, P or S; each n is, independently, 1 or 2; each R is, independently, an alkyl group, a substituted alkyl group, an aryl group, or a substituted aryl group, provided at least one R group is an aryl or substituted aryl group. This invention also relates to the use of the above catalyst compound with an aluminum alkyl to polymerize olefins and other monomers.Type: GrantFiled: October 30, 2006Date of Patent: January 19, 2010Assignee: ExxonMobil Chemical Patents Inc.Inventors: Matthew W. Holtcamp, Renuka N. Ganesh
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Publication number: 20090124486Abstract: This invention relates to an activator, catalyst system, and the use thereof. In one aspect, the catalyst system includes one or more polymerization catalysts and at least one activator. The activator comprises one or more heterocyclic heteroatom containing ligands coordinated to an alumoxane, wherein the activator is a reaction product of one or more alumoxanes and one or more heterocyclic heteroatom containing compounds, the one or more heterocyclic heteroatom containing ligands represented by the formula: where Y is O, S, PH or NH; wherein each substituent X2, X3, X4, X5, X6, and X7 is independently selected from the group consisting of hydrogen, chlorine, fluorine, iodine, and bromine, provided at least one of X2, X3, X4, X5, X6 and X7 is not hydrogen when Y is NH; and wherein the ratio of the heterocyclic heteroatom containing ligand to aluminum is between about 0.01 and about 10 molar equivalents. The catalyst system may be supported or non-supported.Type: ApplicationFiled: November 8, 2007Publication date: May 14, 2009Inventors: Matthew W. Holtcamp, Renuka N. Ganesh
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Publication number: 20080319234Abstract: A promoter can have utility in selective heterogeneous oxidation of arylalkyl hydrocarbons such as, for example, cyclohexyl benzene and/or sec-butyl benzene to form hydroperoxides. The promoter can include the product of contacting a solid support comprising a metal oxide surface and an iron compound. The solid support can include, for example, titanium dioxide and/or an iron oxide such as magnetite and can have magnetic susceptibility. A method for the oxidation of arylalkyl hydrocarbons to form hydroperoxides can include contacting 16 an arylalkyl hydrocarbon with oxygen in the presence of the promoter under catalytic oxidation conditions to form arylalkyl hydroperoxide, which can then be converted to phenol via cleavage 26. The method can include recovery 22 of the promoter from the arylalkyl hydroperoxide and can further include recycling the recovered promoter to the contacting 16. Where the solid support has magnetic susceptibility, the recovery 22 can include magnetic separation of the promoter.Type: ApplicationFiled: June 21, 2007Publication date: December 25, 2008Inventors: Matthew W. Holtcamp, Renuka N. Ganesh, Tan-Jen Chen, Jihad M. Dakka