Patents by Inventor Vinit CHILEKAR
Vinit CHILEKAR 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: 20200332058Abstract: This invention relates to a process for the continuous production of polyether polyols, polyether polyols produced by the inventive continuous process and their use in polyurethane applications.Type: ApplicationFiled: July 2, 2020Publication date: October 22, 2020Applicant: BASF SEInventors: Julia Grosse-Willerich, Kerstin Wiss, Karl-Heinz Wassmer, Peter Deglmann, Christian Buss, Vinit Chilekar
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Patent number: 10752731Abstract: This invention relates to a process for the continuous production of polyether polyols, polyether polyols produced by the inventive continuous process and their use in polyurethane applications.Type: GrantFiled: April 1, 2015Date of Patent: August 25, 2020Assignees: BASF SE, BASF Schwarzheide GmbHInventors: Julia Grosse-Willerich, Kerstin Wiss, Karl-Heinz Wassmer, Peter Deglmann, Christian Buss, Vinit Chilekar
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Publication number: 20200207912Abstract: This invention relates to a process for the continuous production of polyether polyols, polyether polyols produced by the inventive continuous process and their use in polyurethane applications.Type: ApplicationFiled: March 9, 2020Publication date: July 2, 2020Applicant: BASF SEInventors: Julia GROSSE-WILLERICH, Kerstin Wiss, Karl-Heinz Wassmer, Peter Deglmann, Christian Buss, Vinit Chilekar
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Publication number: 20170037183Abstract: This invention relates to a process for the continuous production of polyether polyols, polyether polyols produced by the inventive continuous process and their use in polyurethane applications.Type: ApplicationFiled: April 1, 2015Publication date: February 9, 2017Applicant: BASF SEInventors: Julia GROSSE-WILLERICH, Kerstin WISS, Karl-Heinz WASSMER, Peter DEGLMANN, Christian BUSS, Vinit CHILEKAR
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Patent number: 9132387Abstract: The invention relates to a process for working-up a reaction mixture (5) comprising polyetherol and dissolved alkali metal comprising catalyst, wherein at least alkali metal ions of the dissolved alkali metal comprising catalyst are partially or completely removed from the mixture by a membrane separation process, the process comprising following steps: (a) feeding the reaction mixture (5) comprising polyetherol and dissolved alkali metal comprising catalyst into a first chamber (1) of a separation unit (3), (b) feeding a solvent into a second chamber (7) of the separation unit (3), the first chamber (1) and the second chamber (7) being separated by a membrane (9), (c) transporting at least the alkali metal ions of the alkali metal comprising catalyst from the first chamber (1) into the second chamber by passing through the membrane (9).Type: GrantFiled: December 12, 2012Date of Patent: September 15, 2015Assignee: BASF SEInventors: Vinit Chilekar, Hartwig Voss, Jelan Kuhn, Ann De Colvenaer, Andreas Brodhagen
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Patent number: 8957257Abstract: A process for a continuous production of a polyetherol first involves reacting a catalyst (5) with an alcohol starter (3) or an alkoxylated precursor, to give a mixture comprising an alcoholate and water. Water is then removed from the mixture. The process further involves feeding the alcoholate into a bubble column and feeding an alkylene oxide into the bottom of a compartment of the bubble column, such that the alkylene oxide rises in the alcoholate. The alkylene oxide then reacts with the alcoholate or a secondary product from the reaction between the alcoholate and alkylene oxide, to give the polyetherol.Type: GrantFiled: July 18, 2012Date of Patent: February 17, 2015Assignee: BASF SEInventors: Vinit Chilekar, Oliver Bey, Andreas Brodhagen, Achim Loffler, Fatemeh Admadnian, Ralf Bohling, Christoph Grossmann, Ulrich Kammel, Ronald Adelmann, Thomas Ostrowski, Milind Joshi, Gerrit Waters, Dirk Meckelnburg
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Publication number: 20130261206Abstract: The present invention relates to a process for the continuous production of polyether alcohols by catalyzed addition of at least one alkylene oxide to at least one hydrogen-functional starter compound, wherein at least one catalyst exhibits the structural element R1/R2C=N?R3.Type: ApplicationFiled: March 28, 2013Publication date: October 3, 2013Applicant: BASF SEInventors: Vinit CHILEKAR, Kerstin WISS, Julia Frauke GROSSE, Peter DEGLMANN, Achim LOEFFLER
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Publication number: 20130146537Abstract: The invention relates to a process for working-up a reaction mixture (5) comprising polyetherol and dissolved alkali metal comprising catalyst, wherein at least alkali metal ions of the dissolved alkali metal comprising catalyst are partially or completely removed from the mixture by a membrane separation process, the process comprising following steps: (a) feeding the reaction mixture (5) comprising polyetherol and dissolved alkali metal comprising catalyst into a first chamber (1) of a separation unit (3), (b) feeding a solvent into a second chamber (7) of the separation unit (3), the first chamber (1) and the second chamber (7) being separated by a membrane (9), (c) transporting at least the alkali metal ions of the alkali metal comprising catalyst from the first chamber (1) into the second chamber by passing through the membrane (9).Type: ApplicationFiled: December 12, 2012Publication date: June 13, 2013Inventors: Vinit CHILEKAR, Hartwig Voss, Jelan Kuhn, Ann De Colvenaer, Andreas Brodhagen
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Patent number: 8461285Abstract: The present invention relates to a process for the catalytic preparation of polyetherols, wherein the power input by means of at least one stirrer and/or by means of at least one pump, based on the reactor volume, is in the range from 0.001 to 8.2 kW/m3.Type: GrantFiled: March 8, 2011Date of Patent: June 11, 2013Assignee: BASF SEInventors: Fatemeh Ahmadnian, Vinit Chilekar, Andreas Brodhagen, Achim Loeffler, Hermann Graf
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Publication number: 20130030074Abstract: The present invention relates to a process for the continuous production of polyether alcohols.Type: ApplicationFiled: July 25, 2012Publication date: January 31, 2013Applicant: BASF SEInventors: Vinit CHILEKAR, Kerstin Wiss, Achim Löffler, Peter Deglmann, Sirus Zarbakhsh, Christian Buß
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Publication number: 20130023700Abstract: A process for a continuous production of a polyetherol first involves reacting an alcohol with a starter or an alkoxylated precursor, to give a mixture comprising an alcoholate and water. Water is then removed from the mixture. The process further involves feeding the alcoholate into a bubble column and feeding an alkylene oxide into the bottom of a compartment of the bubble column, such that the alkylene oxide rises in the alcoholate. The alkylene oxide then reacts with the alcoholate or a secondary product from the reaction between the alcoholate and alkylene oxide, to give the polyetherol.Type: ApplicationFiled: July 18, 2012Publication date: January 24, 2013Applicant: BASF SEInventors: Vinit Chilekar, Oliver Bey, Andreas Brodhagen, Achim Löffler, Fatemeh Ahmadnian, Ralf Böhling, Christoph Grossmann, Ulrich Kammel, Ronald Adelmann, Thomas Ostrowski, Milind Joshi, Gerrit Waters, Dirk Meckelnburg
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Publication number: 20120130134Abstract: A process for the preparation of polyetherols, comprising the following steps: a) reaction of at least one starter compound with at least one alkylene oxide and a catalyst to give a crude polyetherol and b) removal of low molecular weight byproducts from the crude polyetherol from step a), wherein the crude polyetherol is treated with a stripping gas in a column having internals.Type: ApplicationFiled: July 27, 2010Publication date: May 24, 2012Applicant: BASF SEInventors: Matthias Schopohl, Thomas Ostrowski, Dirk Meckelnburg, Renata Jovanovic, Achim Loeffler, Hans-Juergen Pallasch, Thorsten Friese, Eckard Schauss, Susanne Szeschkus, Vinit Chilekar, Hans Volkmar Schwarz
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Publication number: 20110224396Abstract: The present invention relates to a process for the catalytic preparation of polyetherols, wherein the power input by means of at least one stirrer and/or by means of at least one pump, based on the reactor volume, is in the range from 0.001 to 8.2 kW/m3.Type: ApplicationFiled: March 8, 2011Publication date: September 15, 2011Applicant: BASF SEInventors: Fatemeh AHMADNIAN, Vinit Chilekar, Andreas Brodhagen, Achim Löffler, Hermann Graf
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Publication number: 20110218324Abstract: In a process for preparing a polyether alcohol d1) by reaction of a) at least one compound having at least three hydrogen atoms reactive with alkylene oxides and a molecular weight Mn of not more than 600 g/mol with b) an alkylene oxide by using c) a catalyst, said reaction is carried out in the presence of a polyether alcohol d) having a hydroxyl number of 100-800 mg KOH/g and a functionality of 1.5 to 8.Type: ApplicationFiled: March 1, 2011Publication date: September 8, 2011Applicant: BASF SEInventors: Sirus ZARBAKHSH, Markus SCHÜTTE, Holger SEIFERT, Vinit CHILEKAR, Berend ELING, Jan RUDLOFF