Patents by Inventor Albena Kostova
Albena Kostova 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: 10081580Abstract: The present invention relates to a process for preparing cyclohexane by isomerizing a hydrocarbon mixture (HM1) comprising methylcyclopentane (MCP) in the presence of a catalyst. The catalyst is preferably an acidic ionic liquid. The starting material used is a stream (S1) which originates from a steamcracking process. The hydrocarbon mixture (HM1) obtained from this stream (S1) in an apparatus for aromatics removal has a reduced aromatics content compared to stream (S1), and (HM1) may optionally also be (virtually) free of aromatics. Depending on the type and amount of the aromatics remaining in the hydrocarbon mixture (HM1), especially in the case that benzene is present, the isomerization may additionally be preceded by performance of a hydrogenation of (HM1). In addition, depending on the presence of other components of (HM1), further purification steps may optionally be performed prior to or after the isomerization or hydrogenation.Type: GrantFiled: October 15, 2013Date of Patent: September 25, 2018Assignee: BASF SEInventors: Steffen Tschirschwitz, Kathrin Wissel-Stoll, Jochen Bürkle, Albena Kostova, Markus Schmitt, Veronika Wloka, Stephan Deuerlein, Marco Bosch, Steffen Oehlenschläger, Michael Schreiber, Gauthier Luc Maurice Averlant, Joni Joni, Roman Prochazka, Martin Bock, Alois Kindler, Daniela Malkowsky, Katharina Spuhl, Stefan Bitterlich, Daniel Pfeiffer
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Patent number: 9012707Abstract: The invention relates to a process for the autothermal gas-phase dehydrogenation of a hydrocarbon-comprising gas stream by means of an oxygen-comprising gas stream over a heterogeneous catalyst configured as a monolith to give a reaction gas mixture and regeneration of the catalyst in a reactor in the form of a cylinder or prism, wherein the reactor is operated alternately in the production mode of the autothermal gas-phase dehydrogenation and in the regeneration mode.Type: GrantFiled: August 1, 2012Date of Patent: April 21, 2015Assignee: BASF SEInventors: Gerhard Olbert, Ulrike Wegerle, Grigorios Kolios, Albena Kostova
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Patent number: 8802019Abstract: A reactor includes an essentially horizontal cylinder for carrying out an autothermal gas-phase dehydrogenation of a hydrocarbon-comprising gas stream using an oxygen-comprising gas stream to give a reaction gas mixture over a heterogeneous catalyst configured as monolith. The interior of the reactor is divided by a detachable, cylindrical or prismatic housing, which is arranged in the longitudinal direction of the reactor and is gastight in the circumferential direction, into an inner region having one or more catalytically active zones, each having a packing composed of monoliths stacked on top of one another, next to one another and behind one another and before each catalytically active zone in each case a mixing zone having solid internals are provided and into an outer region, which is supplied with an inert gas, arranged coaxially to the inner region. A heat exchanger is connected to the housing at one end of the reactor.Type: GrantFiled: December 20, 2011Date of Patent: August 12, 2014Assignee: BASF SEInventors: Gerhard Olbert, Ulrike Wegerle, Grigorios Kolios, Albena Kostova, Jasmina Kessel, Alexander Weck, Alireza Rezai
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Patent number: 8785704Abstract: The present invention relates to a process for nonoxidatively dehydroaromatizing a reactant stream comprising C1-C4-aliphatics by converting the reactant stream in the presence of a catalyst in a reaction zone 1 to a product stream P comprising aromatic hydrocarbons, and regenerating the catalyst whose activity has been reduced by deposited coke with a hydrogen-comprising mixture H in a reaction zone 2, wherein at least a portion of the deposited coke is converted to methane and at least a portion of the methane formed is fed to reaction zone 1.Type: GrantFiled: May 20, 2009Date of Patent: July 22, 2014Assignee: BASF SEInventors: Frank Kiesslich, Achim Gritsch, Christian Schneider, Albena Kostova
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Patent number: 8729331Abstract: The invention relates to a process for the electrochemical separation of hydrogen from a hydrogen-comprising reaction mixture R by means of a gastight membrane-electrode assembly comprising at least one selectively proton-conducting membrane and at least one electrode catalyst on each side of the membrane, where at least part of the hydrogen present in the reaction mixture R is oxidized to protons over the anode catalyst on the retentate side of the membrane and the protons are, after passing through the membrane to the permeate side, I reduced to hydrogen over the cathode catalyst and/or II reacted with oxygen over the cathode catalyst to form water, with the oxygen originating from an oxygen-comprising stream O which is brought into contact with the permeate side of the membrane, and also a reactor equipped with at least one membrane-electrode assembly.Type: GrantFiled: March 29, 2010Date of Patent: May 20, 2014Assignee: BASF SEInventors: Joana Coelho Tsou, Alexander Panchenko, Annebart Engbert Wentink, Sebastian Ahrens, Thomas Heidemann, Guenther Huber, Albena Kostova
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Publication number: 20140114099Abstract: The present invention relates to a process for preparing cyclohexane by isomerizing a hydrocarbon mixture (HM1) comprising methylcyclopentane (MCP) in the presence of a catalyst. The catalyst is preferably an acidic ionic liquid. The starting material used is a stream (S1) which originates from a steamcracking process. The hydrocarbon mixture (HM1) obtained from this stream (S1) in an apparatus for aromatics removal has a reduced aromatics content compared to stream (S1), and (HM1) may optionally also be (virtually) free of aromatics. Depending on the type and amount of the aromatics remaining in the hydrocarbon mixture (HM1), especially in the case that benzene is present, the isomerization may additionally be preceded by performance of a hydrogenation of (HM1). In addition, depending on the presence of other components of (HM1), further purification steps may optionally be performed prior to or after the isomerization or hydrogenation.Type: ApplicationFiled: October 15, 2013Publication date: April 24, 2014Applicant: BASF SEInventors: Steffen Tschirschwitz, Kathrin Wissel-Stoll, Jochen Bürkle, Albena Kostova, Markus Schmitt, Veronika Wloka, Stephan Deuerlein, Marco Bosch, Steffen Oehlenschläger, Michael Schreiber, Gauthier Luc Maurice Averlant, Joni Joni, Roman Prochazka, Martin Bock, Alois Kindler, Daniela Malkowsky, Katharina Spuhl, Stefan Bitterlich, Daniel Pfeiffer
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Patent number: 8697016Abstract: A reactor in the form of an essentially horizontal cylinder for carrying out an autothermal gas-phase dehydrogenation of a hydrocarbon-comprising gas stream by means of an oxygen-comprising gas stream to give a reaction gas mixture over a heterogeneous catalyst configured as monolith is disclosed herein. The interior of the reactor is divided by a detachable, cylindrical or prismatic housing which is arranged in the longitudinal direction of the reactor, gastight in the circumferential direction and open at two end faces of the housing into an inner region, having one or more catalytically active zones. In each case, a packing composed of monoliths may be stacked on top of one another, next to one another, and above one another and before each catalytically active zone. Also in each case, a mixing zone having solid internals and an outer region arranged coaxially to the inner region are provided.Type: GrantFiled: December 1, 2010Date of Patent: April 15, 2014Assignee: BASF SEInventors: Grigorios Kolios, Wilhelm Ruppel, Ulrike Wegerle, Jasmina Kessel, Wolfgang Gerlinger, Godwind Tafara Peter Mabande, Goetz-Peter Schindler, Albena Kostova, Gerhard Olbert, Peter Pfab
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Patent number: 8420879Abstract: The invention relates to a process for workup of a stream (1) comprising butene and/or butadiene, butane, hydrogen and/or nitrogen and carbon dioxide, comprising: (a) absorption of stream (1) with a mixture (5) comprising 80 to 97% by weight of N-methylpyrrolidone and 3 to 20% by weight of water to obtain a stream (9) comprising N-methylpyrrolidone, water, butene and/or butadiene, butane, and optionally carbon dioxide, and a stream (7) comprising hydrogen and/or nitrogen and butane, (b) extractive distillation of stream (9) with a stream (13) comprising 80 to 97% by weight of N-methylpyrrolidone and 3 to 20% by weight of water to separate the stream (9) into a stream (17) comprising N-methylpyrrolidone, water, butene and/or butadiene, and a stream (15) comprising essentially butane, and optionally carbon dioxide, (c) distillation of stream (17) into a stream (23) comprising essentially N-methylpyrrolidone and water, and a stream (21) comprising butene and/or butadiene.Type: GrantFiled: March 2, 2012Date of Patent: April 16, 2013Assignee: BASF SEInventors: Albena Kostova, Regina Benfer, Jochen Götz, Alireza Rezai, Aristides Morillo, Gerhard Olbert, Peter Pfab, Grigorios Kolios, Markus Weber, Alexander Weck
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Publication number: 20130035529Abstract: The invention relates to a process for the autothermal gas-phase dehydrogenation of a hydrocarbon-comprising gas stream by means of an oxygen-comprising gas stream over a heterogeneous catalyst configured as a monolith to give a reaction gas mixture and regeneration of the catalyst in a reactor in the form of a cylinder or prism, wherein the reactor is operated alternately in the production mode of the autothermal gas-phase dehydrogenation and in the regeneration mode.Type: ApplicationFiled: August 1, 2012Publication date: February 7, 2013Applicant: BASF SEInventors: Gerhard Olbert, Ulrike Wegerle, Grigorios Kolios, Albena Kostova
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Publication number: 20120226087Abstract: The invention relates to a process for workup of a stream (1) comprising butene and/or butadiene, butane, hydrogen and/or nitrogen and carbon dioxide, comprising: (a) absorption of stream (1) with a mixture (5) comprising 80 to 97% by weight of N-methylpyrrolidone and 3 to 20% by weight of water to obtain a stream (9) comprising N-methylpyrrolidone, water, butene and/or butadiene, butane, and optionally carbon dioxide, and a stream (7) comprising hydrogen and/or nitrogen and butane, (b) extractive distillation of stream (9) with a stream (13) comprising 80 to 97% by weight of N-methylpyrrolidone and 3 to 20% by weight of water to separate the stream (9) into a stream (17) comprising N-methylpyrrolidone, water, butene and/or butadiene, and a stream (15) comprising essentially butane, and optionally carbon dioxide, (c) distillation of stream (17) into a stream (23) comprising essentially N-methylpyrrolidone and water, and a stream (21) comprising butene and/or butadiene.Type: ApplicationFiled: March 2, 2012Publication date: September 6, 2012Applicant: BASF SEInventors: Albena Kostova, Regina Benfer, Jochen Götz, Alireza Rezai, Aristides Morillo, Gerhard Olbert, Peter Pfab, Grigorios Kolios, Markus Weber, Alexander Weck
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Publication number: 20120157737Abstract: A reactor includes an essentially horizontal cylinder for carrying out an autothermal gas-phase dehydrogenation of a hydrocarbon-comprising gas stream using an oxygen-comprising gas stream to give a reaction gas mixture over a heterogeneous catalyst configured as monolith. The interior of the reactor is divided by a detachable, cylindrical or prismatic housing, which is arranged in the longitudinal direction of the reactor and is gastight in the circumferential direction, into an inner region having one or more catalytically active zones, each having a packing composed of monoliths stacked on top of one another, next to one another and behind one another and before each catalytically active zone in each case a mixing zone having solid internals are provided and into an outer region, which is supplied with an inert gas, arranged coaxially to the inner region. A heat exchanger is connected to the housing at one end of the reactor.Type: ApplicationFiled: December 20, 2011Publication date: June 21, 2012Applicant: BASF SEInventors: Gerhard Olbert, Ulrike Wegerle, Grigorios Kolios, Albena Kostova, Jasmina Kessel, Alexander Weck, Alireza Rezai
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Publication number: 20120012471Abstract: The invention relates to a process for the electrochemical separation of hydrogen from a hydrogen-comprising reaction mixture R by means of a gastight membrane-electrode assembly comprising at least one selectively proton-conducting membrane and at least one electrode catalyst on each side of the membrane, where at least part of the hydrogen present in the reaction mixture R is oxidized to protons over the anode catalyst on the retentate side of the membrane and the protons are, after passing through the membrane to the permeate side, I reduced to hydrogen over the cathode catalyst and/or II reacted with oxygen over the cathode catalyst to form water, with the oxygen originating from an oxygen-comprising stream O which is brought into contact with the permeate side of the membrane, and also a reactor equipped with at least one membrane-electrode assembly.Type: ApplicationFiled: March 29, 2010Publication date: January 19, 2012Applicant: BASF SEInventors: Joana Coelho Tsou, Alexander Panchenko, Annebart Engbert Wentink, Sebastian Ahrens, Thomas Heidemann, Guenther Huber, Albena Kostova
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Publication number: 20110130607Abstract: A reactor (1) in the form of an essentially horizontal cylinder for carrying out an autothermal gas-phase dehydrogenation of a hydrocarbon-comprising gas stream (2) by means of an oxygen-comprising gas stream (3) to give a reaction gas mixture over a heterogeneous catalyst configured as monolith (4), wherein the interior of the reactor (1) is divided by a detachable, cylindrical or prismatic housing G which is arranged in the longitudinal direction of the reactor (1) and is gastight in the circumferential direction and open at two end faces of the housing into an inner region A having one or more catalytically active zones (5), in which in each case a packing composed of monoliths (4) stacked on top of one another, next to one another and above one another and before each catalytically active zone (5) in each case a mixing zone (6) having solid internals are provided, and an outer region B arranged coaxially to the inner region A, is proposed.Type: ApplicationFiled: December 1, 2010Publication date: June 2, 2011Applicant: BASF SEInventors: Grigorios Kolios, Wilhelm Ruppel, Ulrike Wegerle, Jasmina Kessel, Wolfgang Gerlinger, Godwind Tafara Peter Mabande, Goetz-Peter Schindler, Albena Kostova, Gerhard Olbert, Peter Pfab
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Publication number: 20110130606Abstract: The present invention relates to a process for nonoxidatively dehydroaromatizing a reactant stream comprising C1-C4-aliphatics by converting the reactant stream in the presence of a catalyst in a reaction zone 1 to a product stream P comprising aromatic hydrocarbons, and regenerating the catalyst whose activity has been reduced by deposited coke with a hydrogen-comprising mixture H in a reaction zone 2, wherein at least a portion of the deposited coke is converted to methane and at least a portion of the methane formed is fed to reaction zone 1.Type: ApplicationFiled: May 20, 2009Publication date: June 2, 2011Applicant: BASF SEInventors: Frank Kiesslich, Achim Gritsch, Christian Schneider, Albena Kostova