Patents by Inventor Sanjay Purushottam Godbole
Sanjay Purushottam Godbole 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: 6843890Abstract: A process of treating waste solvent acetonitrile streams which contain at least one water extractable impurity such as isopropyl acetate to remove substantially all of the impurity by distilling the waste solvent acetonitrile in the presence of water for a time sufficient to allow the water extractable impurity to be extractively distilled from the acetonitrile. In preferred embodiments of the present invention the feed may contain either a mixture of waste solvent acetonitrile and crude acetonitrile or crude acetonitrile free of hydrogen cyanide by itself.Type: GrantFiled: July 23, 1999Date of Patent: January 18, 2005Assignee: The Standard Oil CompanyInventor: Sanjay Purushottam Godbole
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Patent number: 6667020Abstract: A process increasing the yield of both HCN and acetonitrile produced during the manufacture of acrylonitrile comprising introducing a hydrocarbon selected from the group consisting of propylene and propane, a crude ketone and/or a mixture of at least two ketones, ammonia and air, into a reaction zone containing an ammoxidation catalyst, reacting the. hydrocarbon, the ketone, ammonia and oxygen over said catalyst at an elevated temperature to produce acrylonitrile, hydrogen cyanide and acetonitrile, and recovering the acrylonitrile, hydrogen cyanide and acetonitrile from the reactor.Type: GrantFiled: December 10, 2001Date of Patent: December 23, 2003Assignee: The Standard Oil CompanyInventors: Michael J. Seely, Sanjay Purushottam Godbole, Dev Dhanaraj Suresh
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Publication number: 20030198586Abstract: A process increasing the yield of both HCN and acetonitrile produced during the manufacture of acrylonitrile comprising introducing a hydrocarbon selected from the group consisting of propylene and propane, a crude ketone and/or a mixture of at least two ketones, ammonia and air, into a reaction zone containing an ammoxidation catalyst, reacting the hydrocarbon, the ketone, ammonia and oxygen over said catalyst at an elevated temperature to produce acrylonitrile, hydrogen cyanide and acetonitrile, and recovering the acrylonitrile, hydrogen cyanide and acetonitrile from the reactor.Type: ApplicationFiled: December 10, 2001Publication date: October 23, 2003Inventors: Michael J. Seely, Sanjay Purushottam Godbole, Dev Dhanaraj Suresh
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Patent number: 6413485Abstract: A process increasing the yield of both HCN and acetonitrile produced during the manufacture of acrylonitrile comprising introducing a hydrocarbon selected from the group consisting of propylene and propane, a crude ketone and/or a mixture of at least two ketones, ammonia and air, into a reaction zone containing an ammoxidation catalyst, reacting the hydrocarbon, the ketone, ammonia and oxygen over said catalyst at an elevated temperature to produce acrylonitrile, hydrogen cyanide and acetonitrile, and recovering the acrylonitrile, hydrogen cyanide and acetonitrile from the reactor.Type: GrantFiled: May 27, 1999Date of Patent: July 2, 2002Assignee: The Standard Oil CompanyInventors: Michael J. Seely, Sanjay Purushottam Godbole, Dev Dhanaraj Suresh
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Publication number: 20020004027Abstract: A process increasing the yield of both HCN and acetonitrile produced during the manufacture of acrylonitrile comprising introducing a hydrocarbon selected from the group consisting of propylene and propane, a crude ketone and/or a mixture of at least two ketones, ammonia and air, into a reaction zone containing an ammoxidation catalyst, reacting the hydrocarbon, the ketone, ammonia and oxygen over said catalyst at an elevated temperature to produce acrylonitrile, hydrogen cyanide and acetonitrile, and recovering the acrylonitrile, hydrogen cyanide and acetonitrile from the reactor.Type: ApplicationFiled: May 27, 1999Publication date: January 10, 2002Inventors: MICHAEL J. SEELY, SANJAY PURUSHOTTAM GODBOLE, DEV DHANARAJ SURESH
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Patent number: 6326508Abstract: The method of the present invention comprises feeding crude acetonitrile containing acrylonitrile as an impurity and water into the upper portion of a distillation column, distilling the crude acetonitrile in the presence of the water for a time sufficient to allow substantially all of the acrylonitrile impurity to be vaporized in the presence of the water, removing substantially all of the acrylonitrile in an overhead stream exiting from the distillation column and recovering the crude acetonitrile substantially free of acrylonitrile impurity from the lower portion of the distillation column. In particular, the method can be utilized to produce HPLC grade acetonitrile (UV cutoff <190).Type: GrantFiled: September 5, 2000Date of Patent: December 4, 2001Assignee: The Standard Oil CompanyInventors: Sanjay Purushottam Godbole, Richard Lee Wappelhorst, Paul Alan Jacobson
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Patent number: 6107509Abstract: The process of manufacturing an unsaturated mononitrile selected from the group consisting of acrylonitrile and methacrylonitrile comprising transporting a reactor effluent containing the unsaturated mononitrile to a first column where the reactor effluent is cooled with at least one aqueous stream, transporting the cooled effluent containing the unsaturated mononitrile into a second column where the cooled effluent is contacted with at least one second aqueous stream to absorb the unsaturated mononitrile into at least one second aqueous stream, transporting the second aqueous stream containing the unsaturated mononitrile from the second column to a first distillation column for separation of the crude unsaturated mononitrile from the second aqueous stream, and transporting the separated crude unsaturated mononitrile to a second distillation column to remove at least some impurities from the crude mononitrile, and transporting the partially purified crude unsaturated mononitrile to a third distillation columnType: GrantFiled: March 31, 1999Date of Patent: August 22, 2000Assignee: The Standard Oil CompanyInventors: Michael Keith Hagans, Sanjay Purushottam Godbole, Patrick Michael Conrath, Donald Eugene Meihls
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Patent number: 6054603Abstract: The process of the present invention comprises transporting a reactor effluent containing acrylonitrile/methacrylonitrile to a first column (quench) where the reactor effluent is cooled with a first aqueous stream, transporting the cooled effluent into an indirect contact cooler to condensed at least some of the cooled effluent to form a condensate comprising water and acrylonitrile/methacrylonitrile, transporting the remaining cooled gaseous effluent containing acrylonitrile/methacrylonitrile into a second column (absorber) where the cooled effluent is contacted with a second aqueous stream to absorb substantially all of the remaining acrylonitrile/methacrylonitrile into the second aqueous stream, transporting the second aqueous stream containing the acrylonitrile/methacrylonitrile to a first distillation column (recovery column) for separation of the crude acrylonitrile/methacrylonitrile from the second aqueous stream, and transporting the separated crude acrylonitrile/methacrylonitrile to a second distillaType: GrantFiled: April 6, 1999Date of Patent: April 25, 2000Assignee: The Standard Oil CompanyInventor: Sanjay Purushottam Godbole
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Patent number: 6002040Abstract: A process for manufacturing acrylonitrile comprising reacting propylene, ammonia and oxygen in a reactor zone in the presence of a catalyst to produce a reactor effluent containing crude acrylonitrile, transferring the reactor effluent containing crude acrylonitrile to a quench column wherein the reactor effluent containing crude acrylonitrile is contacted with an aqueous stream to cool the reactor effluent, transferring the cooled reactor effluent containing the crude acrylonitrile to an absorption column wherein the reactor effluent containing crude acrylonitrile is contacted with a second aqueous stream to separate and remove the crude acrylonitrile as a bottom stream from the absorption column, transferring the bottom stream containing the crude acrylonitrile to a recovery and purification section where the acrylonitrile is recovered and purified, wherein the improvement comprises supplying the second aqueous stream to the absorption column by means of liquid spray nozzles.Type: GrantFiled: May 14, 1998Date of Patent: December 14, 1999Assignee: The Standard Oil CompanyInventors: Jeffrey Earle Rinker, Paul Trigg Wachtendorf, Vincent Astor Little, III, Sanjay Purushottam Godbole