Patents by Inventor Gurram Kishan
Gurram Kishan 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: 9169371Abstract: Disclosed herein is a composition comprising an organic polymer and about 2 to about 10 weight percent of an ionic liquid. The ionic liquid can be a halogenated or non-halogenated ionic liquid. Disclosed herein too are articles manufactured from the composition.Type: GrantFiled: June 16, 2011Date of Patent: October 27, 2015Assignee: SABIC GLOBAL TECHNOLOGIES B.V.Inventors: Reema Sinha, Sangita Nandi, Susanta Mitra, Radha Kamalakaran, Edward Kung, Dwairath Dhar, Gurram Kishan
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Publication number: 20120322703Abstract: Disclosed herein is a composition comprising an organic polymer and about 2 to about 10 weight percent of an ionic liquid. The ionic liquid can be a halogenated or non-halogenated ionic liquid. Disclosed herein too are articles manufactured from the composition.Type: ApplicationFiled: June 16, 2011Publication date: December 20, 2012Applicant: SABIC INNOVATIVE PLASTICSInventors: Reema Sinha, Sangita Nandi, Susanta Mitra, Radha Kamalakaran, Edward Kung, Dwairath Dhar, Gurram Kishan
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Patent number: 7915332Abstract: This invention relates to organic salt compositions useful in the preparation of organoclay compositions, polymer-organoclay composite compositions, and methods for the preparation of polymer nanocomposites. In one embodiment, the present invention provides an organoclay composition comprising alternating inorganic silicate layers and organic layers, said organic layers comprising a quaternary phosphonium cation having structure X wherein Ar1, Ar2, and Ar3 are independently C2-C50 aromatic radicals; Ar4 is a bond or a C2-C50 aromatic radical; “a” is a number from 1 to about 200; “c” is a number from 0 to 3; R1 is independently at each occurrence a halogen atom, a C1-C20 aliphatic radical, a C5-C20 cycloaliphatic radical, or a C2-C20 aromatic radical; and R2 is a halogen atom, a C1-C20 aliphatic radical, a C5-C20 cycloaliphatic radical, a C2-C50 aromatic radical, or a polymer chain.Type: GrantFiled: June 21, 2007Date of Patent: March 29, 2011Assignee: Sabic Innovative Plastics IP B.V.Inventors: Kwok Pong Chan, Joshua McClellan Croll, Balakrishnan Ganesan, Marcus J. Harrigan, Farid Fouad Khouri, Gurram Kishan, Ritesh Mathur, Rachel Marie Suffield, Wenhul Wang, James Mitchell White
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Patent number: 7915430Abstract: A method of producing a phenolphthalein comprises reacting a phenolic compound of the formula: wherein R1 is a hydrogen or a C1-C12 hydrocarbyl group, with a phthalic anhydride compound of the formula: wherein R2 is a hydrogen, a C1-C12 hydrocarbyl group, or a halogen, in the presence of a heterogeneous catalyst and a promoter to form a reaction mixture comprising a phenolphthalein compound of the formula: wherein each R1 is independently a hydrogen or a C1-C12 hydrocarbyl group, and R2 is a hydrogen, a C1-C12 hydrocarbyl group, or a halogen; wherein the heterogeneous catalyst comprises a metal oxide composition in combination with a porous support, wherein the metal is molybdenum, tungsten, or a combination comprising at least one of the foregoing metals.Type: GrantFiled: September 29, 2008Date of Patent: March 29, 2011Assignee: Sabic Innovative Plastics IP B.V.Inventors: Venkata Rama Narayanan Ganapathy Bhotla, Shivappa Basappa Halligudi, Gurram Kishan, Salkod Parameshwar Mallika, Bhaskar Veldurthy
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Patent number: 7868190Abstract: A method for producing a phenolphthalein compound comprises: reacting a phenolic compound of the formula: wherein R1 is a hydrogen or a C1-C12 hydrocarbyl group, with a phthalic anhydride compound of the formula: wherein R2 is a hydrogen, a C1-C12 hydrocarbyl group, or a halogen, in the presence of a heterogeneous catalyst and a promoter to form a reaction mixture comprising a phenolphthalein compound of the formula: wherein each R1 is independently a hydrogen or a C1-C12 hydrocarbyl group; and R2 is a hydrogen, a C1-C12 hydrocarbyl group, or a halogen; wherein the heterogeneous catalyst comprises, on a porous support, a calcination product of a heteropolyacid composition.Type: GrantFiled: September 29, 2008Date of Patent: January 11, 2011Assignee: Sabic Innovative Plastics IP B.V.Inventors: Venkata Rama Narayanan Ganapathy Bhotla, Shivappa Basappa Halligudi, Gurram Kishan, Salkod Parameshwar Mallika, Bhaskar Veldurthy
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Patent number: 7838689Abstract: A method for producing a phenolphthalein compound is disclosed, comprising: reacting a phenolic compound of the formula: wherein Ra is a hydrogen or a C1-C12 hydrocarbyl group, with a phthalic anhydride compound of the formula: wherein Rb is a hydrogen, a C1-C12 hydrocarbyl group, or a halogen, in the presence of an ionic liquid catalyst composition and a promoter to form a reaction mixture comprising a phenolphthalein compound of the formula: wherein each Ra is independently a hydrogen or a C1-C12 hydrocarbyl group, and Rb is a hydrogen, a C1-C12 hydrocarbyl group, or a halogen; wherein the ionic liquid catalyst composition comprises a combination of an ionic liquid and a metal halide wherein the metal is selected from the group consisting of a Group IIB, IIIA, VIII, or IVA metal, and a combination thereof.Type: GrantFiled: September 29, 2008Date of Patent: November 23, 2010Assignee: Sabic Innovative Plastics IP B.V.Inventors: Venkata Rama Narayanan Ganapathy Bhotla, Dwairath Dhar, Gurram Kishan, Salkod Parameshwar Mallika
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Patent number: 7790832Abstract: A method for purifying a 2-aryl-3,3-bis(hydroxyaryl)phthalimidine comprises contacting a crude 2-aryl-3,3-bis(hydroxyaryl)phthalimidine with a purification agent, removing a 2-aryl-3-(aminoaryl)-3-(hydroxyaryl)phthalimidine compound from the crude 2-aryl-3,3-bis(hydroxyaryl)phthalimidine, and producing a purified 2-aryl-3,3-bis(hydroxyaryl)phthalimidine product comprising less than 200 parts per million of the 2-aryl-3-(aminoaryl)-3-(hydroxyaryl)phthalimidine compound. The purification agent is selected from the group consisting of an acidic material, an organic acid chloride, an organic anhydride, or a combination thereof. The 2-aryl-3-(aminoaryl)-3-(hydroxyaryl)phthalimidine compound has a formula: wherein each R1 is independently selected from a group consisting of a hydrocarbyl radical, a nitro radical, and a halogen atom; “a” is an integer from 0 to 4; and Ar1 and Ar2 are independently at each occurrence an aromatic radical.Type: GrantFiled: September 4, 2007Date of Patent: September 7, 2010Assignee: Sabic Innovative Plastics IP B.V.Inventors: Balakrishnan Ganesan, Pradeep Jeevaji Nadkarni, Kumar Arun Satyanarayana, Venkata Rama Narayanan Ganapathy Bhotla, Suresh Shanumgam, Gurram Kishan, Ravindra Vikram Singh
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Patent number: 7696388Abstract: A process for preparing 2,2-bis(4-hydroxyphenyl)propane (p,p-bisphenol-A) from 2,4,4-trimethyl-2-(4-hydroxyphenyl)chroman (chroman 1.5) is disclosed. Phenol and chroman 1.5 are contacted over an acidic ion exchange resin at a given temperature for a given period of time. The process results in improved quality of p,p-bisphenol-A, better performance of catalyst, improved raw material usage, and reduced waste.Type: GrantFiled: July 9, 2008Date of Patent: April 13, 2010Assignee: SABIC Innovative Plastics IP B.V.Inventors: Hatem Abdallah Belfadhel, Umesh Krishna Hasyagar, Gurram Kishan, Rathinam Jothi Mahalingam
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Publication number: 20100081829Abstract: A method for producing a phenolphthalein compound comprises: reacting a phenolic compound of the formula: wherein R1 is a hydrogen or a C1-C12 hydrocarbyl group, with a phthalic anhydride compound of the formula: wherein R2 is a hydrogen, a C1-C12 hydrocarbyl group, or a halogen, in the presence of a heterogeneous catalyst and a promoter to form a reaction mixture comprising a phenolphthalein compound of the formula: wherein each R1 is independently a hydrogen or a C1-C12 hydrocarbyl group; and R2 is a hydrogen, a C1-C12 hydrocarbyl group, or a halogen; wherein the heterogeneous catalyst comprises, on a porous support, a calcination product of a heteropolyacid composition.Type: ApplicationFiled: September 29, 2008Publication date: April 1, 2010Inventors: Venkata Rama Narayanan Ganapathy BHOTLA, Shivappa Basappa HALLIGUDI, Gurram KISHAN, Salkod Parameshwar MALLIKA, Bhaskar VELDURTHY
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Publication number: 20100081828Abstract: A method of producing a phenolphthalein comprises reacting a phenolic compound of the formula: wherein R1 is a hydrogen or a C1-C12 hydrocarbyl group, with a phthalic anhydride compound of the formula: wherein R2 is a hydrogen, a C1-C12 hydrocarbyl group, or a halogen, in the presence of a heterogeneous catalyst and a promoter to form a reaction mixture comprising a phenolphthalein compound of the formula: wherein each R1 is independently a hydrogen or a C1-C12 hydrocarbyl group, and R2 is a hydrogen, a C1-C12 hydrocarbyl group, or a halogen; wherein the heterogeneous catalyst comprises a metal oxide composition in combination with a porous support, wherein the metal is molybdenum, tungsten, or a combination comprising at least one of the foregoing metals.Type: ApplicationFiled: September 29, 2008Publication date: April 1, 2010Inventors: Venkata Rama Narayanan Ganapathy BHOTLA, Shivappa Basappa HALLIGUDI, Gurram KISHAN, Salkod Parameshwar MALLIKA, Bhaskar VELDURTHY
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Publication number: 20100081831Abstract: A method for producing a phenolphthalein compound is disclosed, comprising: reacting a phenolic compound of the formula: wherein Ra is a hydrogen or a C1-C12 hydrocarbyl group, with a phthalic anhydride compound of the formula: wherein Rb is a hydrogen, a C1-C12 hydrocarbyl group, or a halogen, in the presence of an ionic liquid catalyst composition and a promoter to form a reaction mixture comprising a phenolphthalein compound of the formula: wherein each Ra is independently a hydrogen or a C1-C12 hydrocarbyl group, and Rb is a hydrogen, a C1-C12 hydrocarbyl group, or a halogen; wherein the ionic liquid catalyst composition comprises a combination of an ionic liquid and a metal halide wherein the metal is selected from the group consisting of a Group IIB, IIIA, VIII, or IVA metal, and a combination thereofType: ApplicationFiled: September 29, 2008Publication date: April 1, 2010Inventors: Venkata Rama Narayanan Ganapathy BHOTLA, Dwairath DHAR, Gurram KISHAN, Salkod Parameshwar MALLIKA
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Publication number: 20100010273Abstract: A process for preparing 2,2-bis(4-hydroxyphenyl)propane (p,p-bisphenol-A) from 2,4,4-trimethyl-2-(4-hydroxyphenyl)chroman (chroman 1.5) is disclosed. Phenol and chroman 1.5 are contacted over an acidic ion exchange resin at a given temperature for a given period of time. The process results in improved quality of p,p-bisphenol-A, better performance of catalyst, improved raw material usage, and reduced waste.Type: ApplicationFiled: July 9, 2008Publication date: January 14, 2010Applicant: SABIC INNOVATIVE PLASTICS IP BVInventors: Hatem Abdallah Belfadhel, Umesh Krishna Hasyagar, Gurram Kishan, Rathinam Jothi Mahalingam
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Patent number: 7592464Abstract: Disclosed herein is a method comprising reacting a phenolphthalein material and a primary hydrocarbyl amine in the presence of an acid catalyst to form a reaction mixture comprising 2-hydrocarbyl-3,3-bis(4-hydroxyaryl)phthalimidine, wherein the phenolphthalein material comprises greater than or equal to 99 weight percent phenolphthalein, based on the total weight of the phenolphthalein material; quenching the reaction mixture and treating the quenched reaction mixture to obtain a first solid. The first solid is purified by a combination of techniques to produce a solid comprising 2-hydrocarbyl-3,3-bis(4-hydroxyaryl)phthalimidine with sufficient purity to be used as a monomer in the synthesis of clear polymers.Type: GrantFiled: March 30, 2007Date of Patent: September 22, 2009Assignee: SABIC Innovative Plastics IP BVInventors: Rajshekhar Basale, Hyacinth Mary Bastian, Balakrishnan Ganesan, Venkata Rama Narayanan Ganapathy Bhotla, Gurram Kishan, Pushpa Narayanan, Swaminathan Shubashree, Ravindra Vikram Singh
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Patent number: 7563817Abstract: A method for purifying a 2-aryl-3,3-bis(hydroxyaryl)phthalimidine comprises contacting a crude 2-aryl-3,3-bis(hydroxyaryl)phthalimidine with a purification agent, removing a 2-aryl-3-(aminoaryl)-3-(hydroxyaryl)phthalimidine compound from the crude 2-aryl-3,3-bis(hydroxyaryl)phthalimidine, and producing a purified 2-aryl-3,3-bis(hydroxyaryl)phthalimidine product comprising less than 200 parts per million of the 2-aryl-3-(aminoaryl)-3-(hydroxyaryl)phthalimidine compound. The purification agent is selected from the group consisting of an acidic material, an organic acid chloride, an organic anhydride, or a combination thereof. The 2-aryl-3-(aminoaryl)-3-(hydroxyaryl)phthalimidine compound has a formula: wherein each R1 is independently selected from a group consisting of a hydrocarbyl radical, a nitro radical, and a halogen atom; “a” is an integer from 0 to 4; and Ar1 and Ar2 are independently at each occurrence an aromatic radical.Type: GrantFiled: December 14, 2005Date of Patent: July 21, 2009Assignee: SABIC Innovative Plastics IP BVInventors: Balakrishnan Ganesan, Pradeep Jeevaji Nadkarni, Kumar Arun Satyanarayana, Venkata Rama Narayanan Ganapathy Bhotla, Suresh Shanmugam, Gurram Kishan, Ravindra Vikram Singh
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Patent number: 7541417Abstract: A process comprising the steps of dissolving a dihydric phenol in a solvent to form a solution A, contacting the solution A with an adsorbent material selected from the group consisting of metal oxides, modified metal oxides, activated carbons, and clays, filtering the adsorbent material to form a solution B, adding an anti-solvent to the solution B to form a solution C, and distilling the solution C, wherein the dihydric phenol is represented by Formula (I): wherein R is a hydrogen atom or an aliphatic functionality having 1 to 6 carbon atoms and n is an integer having a value of 1 to 4.Type: GrantFiled: March 30, 2006Date of Patent: June 2, 2009Assignee: SABIC Innovative Plastics IP B.V.Inventors: Sunil Ashtekar, Mahesh Malusare, Gurram Kishan, Pushpa Narayanan, Ramanarayanan GV, Arun Dixit, Pradeep Nadkarni, Jan Plen Lens
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Patent number: 7528210Abstract: A process comprising the steps of dissolving a dihydric phenol in a solvent to form a solution A; contacting the solution A with a zeolite; filtering the zeolite to form a solution B; adding an anti-solvent to the solution B to form a solution C; and distilling the solution C; wherein the dihydric phenol is represented by Formula (I): wherein R is a hydrogen atom or an aliphatic functionality having 1 to 6 carbon atoms and n is an integer having a value 1 to 4.Type: GrantFiled: March 30, 2006Date of Patent: May 5, 2009Assignee: SABIC Innovative Plastics IP B.V.Inventors: Guohua Xiu, Tong Sun, Jan Plen Lens, Sunil Ashtekar, Mahesh Malusare, Gurram Kishan, Pushpa Narayanan
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Patent number: 7521505Abstract: A method of producing a polycarbonate, the method comprising: polymerizing a dihydric phenol and a carbonate precursor in the presence of oxalic acid to produce a polycarbonate with a yellowness index of less than or equal to 10 measured in accordance with ASTM E313 test method on molded samples having a thickness of about 2.5 millimeters; wherein the amount of oxalic acid ranges from about 20 parts per million to about 350 parts per million, relative to an amount of the dihydric phenol; wherein the dihydric phenol is represented by Formula (I): wherein R is a hydrogen atom or an aliphatic functionality having 1 to 6 carbon atoms; and n is an integer having a value of 1 to 4.Type: GrantFiled: June 12, 2006Date of Patent: April 21, 2009Assignee: SABIC Innovative Plastics IP B.V.Inventors: Venugopal Boddapaty Venkata, Gurram Kishan, Jan Pleun Lens, Daniel Francis Lowery, Mahesh Malusare, Patrick Joseph McCloskey, Manisha Potdar
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Patent number: 7514524Abstract: Disclosed herein is a method comprising reacting a phenolphthalein material and a primary hydrocarbyl amine in the presence of an acid catalyst to form a reaction mixture comprising 2-hydrocarbyl-3,3-bis(4-hydroxyaryl)phthalimidine, wherein the phenolphthalein material comprises greater than or equal to 95 weight percent phenolphthalein, based on the total weight of phenolphthalein material; quenching the reaction mixture and treating the quenched reaction mixture to obtain a first solid. The first solid is then triturated with a trituration solvent and washed to obtain a second solid, wherein the second solid comprises greater than or equal to 97 weight percent 2-hydrocarbyl-3,3-bis(4-hydroxyaryl)phthalimidine, based on the total weight of the second solid. The second solid may be polymerized to form a polycarbonate.Type: GrantFiled: March 30, 2007Date of Patent: April 7, 2009Assignee: SABIC Innovative Plastics IP B.V.Inventors: Rajshekhar Basale, Balakrishnan Ganesan, Venkata Rama Narayanan Ganapathy Bholta, Gurram Kishan, Surendra Kulkarni, Pradeep Nadkarni, Suresh Shanmugam, Ravindra Vikram Singh
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Patent number: 7473752Abstract: Disclosed herein are silicone resins comprising structural units of the formula: and at least one structural unit selected from the group consisting of: where “A” is a spacer group comprising C2 to C50 alkyl groups; “B” and “C” are spacer groups comprising C2 to C20 alkyl groups; “M1” comprises a Group III element,; R1, R3, R6, and R7 independently comprise OH, alkyl groups, or alkoxy groups; R2 and R4 independently comprise hydrogen, alkali metal, or alkyl groups; and R5 comprises a alkyl group. Methods for preparing these silicone resins are also disclosed. The silicone resins are useful as catalysts for producing bisphenols.Type: GrantFiled: February 5, 2007Date of Patent: January 6, 2009Assignee: SABIC Innovative Plastics IP B.V.Inventors: Gurram Kishan, Rajappan Vetrivel, Nileshkumar Prakash Kukalyekar, Adil Minoo Dhalla
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Publication number: 20080242829Abstract: Disclosed herein is a method comprising reacting a phenolphthalein material and a primary hydrocarbyl amine in the presence of an acid catalyst to form a reaction mixture comprising 2-hydrocarbyl-3,3-bis(4-hydroxyaryl)phthalimidine, wherein the phenolphthalein material comprises greater than or equal to 95 weight percent phenolphthalein, based on the total weight of phenolphthalein material; quenching the reaction mixture and treating the quenched reaction mixture to obtain a first solid. The first solid is then triturated with a trituration solvent and washed to obtain a second solid, wherein the second solid comprises greater than or equal to 97 weight percent 2-hydrocarbyl-3,3-bis(4-hydroxyaryl)phthalimidine, based on the total weight of the second solid. The second solid may be polymerized to form a polycarbonate.Type: ApplicationFiled: March 30, 2007Publication date: October 2, 2008Applicant: GENERAL ELECTRIC COMPANYInventors: Rajshekhar Basale, Balakrishnan Ganesan, Venkata Rama Narayanan Ganapathy Bholta, Gurram Kishan, Surendra Kulkarni, Pradeep Nadkarni, Suresh Shanmugam, Ravindra Vikram Singh