Patents by Inventor Prashant Anil Tatake
Prashant Anil Tatake 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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Publication number: 20210002423Abstract: The invention relates to a process for preparing a polyether polyol comprising: continuously feeding into a reactor which contains a composite metal cyanide complex catalyst and (i) a poly (oxyalkylene) polyol or (ii) a polyether polyol obtainable by the process according to the invention: (a) ethylene oxide, (b) a substituted alkylene oxide, (c) optionally a starter compound having a hydroxyl functionality of from 1 to 8, wherein the weight ratio of the total amount of ethylene oxide fed to the total amount of the substituted alkylene oxide fed is of from 50:50 to 95:5, and wherein the ethylene oxide concentration is below 13,000 parts per million by weight (ppmw) per minute during continuously feeding ethylene oxide, wherein the ethylene oxide concentration is defined as the weight of ethylene oxide in the reactor based on the total weight of the reactor contents.Type: ApplicationFiled: November 5, 2018Publication date: January 7, 2021Inventors: Prashant Anil TATAKE, Prem Kumar DHANAPAL, Michiel Barend ELEVELD, Rama Tejaswi KARIPEDDI, Arvind KUMAR
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Patent number: 10143938Abstract: The present application relates to a method for obtaining a mixture of estrogens from the pregnant mare's urine.Type: GrantFiled: September 12, 2016Date of Patent: December 4, 2018Assignee: DR. REDDY'S LABORATORIES LTD.Inventors: Chandrashaker Akula, John Lomans, Madhukiran Tummidi, Prashant Anil Tatake
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Publication number: 20160375378Abstract: The present application relates to a method for obtaining a mixture of estrogens from the pregnant mare's urine.Type: ApplicationFiled: September 12, 2016Publication date: December 29, 2016Inventors: Chandrashaker Akula, John Lomans, Madhukiran Tummidi, Prashant Anil Tatake
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Publication number: 20140371180Abstract: The present application relates to a method for obtaining a mixture of estrogens from the pregnant mare's urine.Type: ApplicationFiled: June 13, 2014Publication date: December 18, 2014Inventors: Chandrashaker Akula, John Lomans, Madhukiran Tummidi, Prashant Anil Tatake
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Patent number: 7732559Abstract: A method of preparing a halophthalic acid is disclosed which comprises the steps of contacting in a liquid phase reaction mixture at least one halogen-substituted ortho-xylene with oxygen and acetic acid at a temperature in a range between about 120° C. and about 220° C. in the presence of a catalyst system yielding a product mixture comprising less than 10 percent halogen-substituted ortho-xylene starting material, a halophthalic acid product, and less than about 10,000 ppm halobenzoic acid and less than about 1000 ppm halophthalide by-products based on a total amount of halophthalic acid present in the product mixture. In addition methods for the preparation of halophthalic anhydride, and recovery of high purity acetic acid from an aqueous acetic acid stream comprising HCl, which is generated during the preparation of the halophthalic acid are also disclosed.Type: GrantFiled: July 18, 2008Date of Patent: June 8, 2010Assignee: Sabic Innovative Plastics IP B.V.Inventors: Robert Edgar Colborn, David Bruce Hall, Peter Alois Koch, Bernd Volker Demuth, Thomas Wessel, Karl Ernst Mack, Prashant Anil Tatake, Uptal Mahendra Vakil, Shyamal Bhaskar Gondkar, John Edward Pace, Kwang Woong Won
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Patent number: 7541489Abstract: A method of preparing a halophthalic acid is disclosed which comprises the steps of contacting in a liquid phase reaction mixture at least one halogen-substituted ortho-xylene with oxygen and acetic acid at a temperature in a range between about 120° C. and about 220° C. in the presence of a catalyst system yielding a product mixture comprising less than 10 percent halogen-substituted ortho-xylene starting material, a halophthalic acid product, and less than about 10,000 ppm halobenzoic acid and less than about 1000 ppm halophthalide by-products based on a total amount of halophthalic acid present in the product mixture. In addition methods for the preparation of halophthalic anhydride, and recovery of high purity acetic acid from an aqueous acetic acid stream comprising HCl, which is generated during the preparation of the halophthalic acid are also disclosed.Type: GrantFiled: June 29, 2005Date of Patent: June 2, 2009Assignee: SABIC Innovative Plastics IP B.V.Inventors: Robert Edgar Colborn, David Bruce Hall, Peter Alois Koch, Bernd Volker Demuth, Thomas Wessel, KarlErnst Mack, Prashant Anil Tatake, Utpal Mahendra Vakil, Shyamal Bhaskar Gondkar, John Edward Pace, Kwang Woong Won
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Patent number: 7491855Abstract: Use of a specific combination of catalysts for the first and second steps of the process for the conversion of CHP to BPA provides high yields of BPA and low impurity yields, without a requirement for the intermediate purification steps. In the first step, CHP is cleaved in the presence of an acid treated clay such as acid treated Montmorillonite clay to produce phenol and acetone. In the second step, the phenol and acetone produced is reacted, preferably without intermediate purification, in the presence of a cation exchange resin catalyst that includes a cation exchange resin and a mercaptan or mercaptoalkanoic acid promoter to produce BPA.Type: GrantFiled: June 4, 2003Date of Patent: February 17, 2009Assignee: Sabic Innovative Plastics IP B.V.Inventors: Pramod Shankar Kumbhar, Jegadeesh Thampi, Bharat Singh, John W. Fulmer, Prashant Anil Tatake
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Publication number: 20080275211Abstract: A method of preparing a halophthalic acid is disclosed which comprises the steps of contacting in a liquid phase reaction mixture at least one halogen-substituted ortho-xylene with oxygen and acetic acid at a temperature in a range between about 120° C. and about 220° C. in the presence of a catalyst system yielding a product mixture comprising less than 10 percent halogen-substituted ortho-xylene starting material, a halophthalic acid product, and less than about 10,000 ppm halobenzoic acid and less than about 1000 ppm halophthalide by-products based on a total amount of halophthalic acid present in the product mixture. In addition methods for the preparation of halophthalic anhydride, and recovery of high purity acetic acid from an aqueous acetic acid stream comprising HCl, which is generated during the preparation of the halophthalic acid are also disclosed.Type: ApplicationFiled: July 18, 2008Publication date: November 6, 2008Inventors: Robert Edgar Colborn, David Bruce Hall, Peter Alois Koch, Bernd Volker Demuth, Thomas Wessel, Karl Ernst Mack, Prashant Anil Tatake, Utpal Mahendra Vakil, Shyamal Bhaskar Gondkar, John Edward Pace, Kwang Woong Won
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Patent number: 7154010Abstract: Use of a specific combination of catalysts for the first and second steps of the process for the conversion of CHP to BPA provides high yields of BPA and low impurity yields, without a requirement for the intermediate purification steps. In the first step, CHP is cleaved in the presence of a sulfated metal oxide catalyst such as sulfated Zirconia to produce phenol and acetone. In the second step, the phenol and acetone produced is reacted, preferably without intermediate purification, in the presence of a cation exchange resin catalyst that includes a cation exchange resin and a mercaptan or mercaptoalkanoic acid promoter to produce BPA.Type: GrantFiled: June 4, 2003Date of Patent: December 26, 2006Assignee: General Electric CompanyInventors: Pramod Shankar Kumbhar, Jegadeesh Thampi, Bharat Singh, John W. Fulmer, Prashant Anil Tatake
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Patent number: 7109385Abstract: A process for producing a phenol product generally comprises a first step comprising reacting in a first reactor a feed stream comprising cumene hydroperoxide and water with an acid catalyst to produce an effluent comprising the phenol product, acetone, and at least 1% by weight residual cumene hydroperoxide, and a second step comprising passing the effluent into a second reactor and decomposing the residual cumene hydroperoxide, wherein during said process the ratio of phenol to acetone is maintained at a molar ratio of greater than 1:1, and wherein the water in each of the first and second steps is present in an amount more than 0 and less than or equal to 5 weight percent based on the total weight of the feed stream or effluent, and wherein the process is continuous.Type: GrantFiled: March 29, 2005Date of Patent: September 19, 2006Assignee: General Electric CompanyInventors: Prashant Anil Tatake, Pramod Shankar Kumbhar, Bharat Singh, John William Fulmer, Sabyasachi Mandal, Arun N. Kumar, Rupesh Pawar
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Publication number: 20040249223Abstract: Use of a specific combination of catalysts for the first and second steps of the process for the conversion of CHP to BPA provides high yields of BPA and ow impurity yields, without a requirement for the intermediate purification steps. In the first step, CHP is cleaved in the presence of a sulfated metal oxide catalyst such as sulfated Zirconia to produce phenol and acetone. In the second step, the phenol and acetone produced is reacted, preferably without intermediate purification, in the presence of a cation exchange resin catalyst that includes a cation exchange resin and a mercaptan or mercaptoalkanoic acid promoter to produce BPA.Type: ApplicationFiled: June 4, 2003Publication date: December 9, 2004Applicant: GENERAL ELECTRIC CO.Inventors: Pramod Shankar Kumbhar, Jegadeesh Thampl, Bharat Singh, John W. Fulmer, Prashant Anil Tatake
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Publication number: 20040249224Abstract: Use of a specific combination of catalysts for the first and second steps of the process for the conversion of CHP to BPA provides high yields of BPA and low impurity yields, without a requirement for the intermediate purification steps. In the first step, CHP is cleaved in the presence of an acid treated clay such as acid treated Montmorillonite clay to produce phenol and acetone. In the second step, the phenol and acetone produced is reacted, preferably without intermediate purification, in the presence of a cation exchange resin catalyst that includes a cation exchange resin and a mercaptan or mercaptoalkanoic acid promoter to produce BPA.Type: ApplicationFiled: June 4, 2003Publication date: December 9, 2004Applicant: GENERAL ELECTRIC CO.Inventors: Pramod Shankar Kumbhar, Jegadeesh Thampi, Bharat Singh, John W. Fulmer, Prashant Anil Tatake
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Patent number: 6486365Abstract: A process for converting carbonyl-type impurities contained in a phenolic solvent to high-boiling derivatives is provided by contacting the phenolic solvent with a hydrotalcite-type material (HTM). The phenol can be separated from the high-boiling derivatives using conventional separation techniques, such as distillation, so the invention also provides a process for separating carbonyl-type impurities, such as hydroxyacetone (HA), from a phenolic solvent. The process can be applied in the conventional industrial process for converting cumene to phenol to remove carbonyl-type impurities from the phenol product. A process and a facility for producing purified phenol by converting cumene to phenol are provided. In the conversion of cumene to phenol, the phenol often contains carbonyl-type impurities. The phenol and carbonyl-type impurities are reacted in the presence of an HTM to produce phenol and high-boiling derivatives.Type: GrantFiled: April 4, 2002Date of Patent: November 26, 2002Assignee: General Electric CompanyInventors: John W. Fulmer, Bharat Singh, Pramod Kumbhar, Prashant Anil Tatake, Umesh Hasyagar