Patents by Inventor Werner J. Witzl
Werner J. Witzl 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).
-
Patent number: 10676451Abstract: Disclosed is a process for purifying propylene oxide. A stream S0 containing propylene oxide, acetonitrile, water, and an organic compound containing one or more of acetone and propionaldehyde is provided. Propylene oxide is separated from S0 by subjecting S0 to distillation in a first distillation unit, obtaining a gaseous top stream S1c enriched in propylene oxide, a liquid bottom stream S1a enriched in acetonitrile and water, and a side stream S1b containing propylene oxide and enriched in the carbonyl compound; reacting the carbonyl compound in S1b with an organic compound containing an amino group to obtain a reaction product; separating propylene oxide from the reaction product in a second distillation unit, obtaining a gaseous top stream S3a enriched in propylene oxide and a liquid bottoms stream S3b enriched in the reaction product; and introducing stream S3a into the first distillation unit.Type: GrantFiled: July 19, 2017Date of Patent: June 9, 2020Assignees: BASF SE, Dow Global Technologies LLCInventors: Joaquim Henrique Teles, Marvin Kramp, Christian Mueller, Nicolai Tonio Woerz, Bernd Metzen, Tobias Keller, Dominic Riedel, Heiner Schelling, Markus Weber, Daniel Urbanczyk, Andrei-Nicolae Parvulescu, Ulrike Wegerle, Ulrich Mueller, Meinolf Weidenbach, Werner J. Witzl
-
Patent number: 10435381Abstract: The present invention is related to a process for preparing propylene oxide, comprising (i) providing a stream comprising propene, hydrogen peroxide or a source of hydrogen peroxide, water, and an organic solvent; (ii) passing the liquid feed stream provided in (i) into an epoxidation zone comprising an epoxidation catalyst comprising a titanium zeolite, and subjecting the liquid feed stream to epoxidation reaction conditions in the epoxidation zone, obtaining a reaction mixture comprising propene, propylene oxide, water, and the organic solvent; (iii) removing an effluent stream from the epoxidation zone, the effluent stream comprising propylene oxide, water, organic solvent, and propene; (iv) separating propene from the effluent stream by distillation, comprising (iv.Type: GrantFiled: July 19, 2017Date of Patent: October 8, 2019Assignees: BASF SE, Dow Global Technologies LLCInventors: Joaquim Henrique Teles, Marvin Kramp, Christian Mueller, Nicolai Tonio Woerz, Bernd Metzen, Tobias Keller, Dominic Riedel, Heiner Schelling, Markus Weber, Daniel Urbanczyk, Andrei-Nicolae Parvulescu, Ulrike Wegerle, Ulrich Mueller, Meinolf Weidenbach, Werner J. Witzl, Karsten Luecke
-
Patent number: 10316007Abstract: A continuous process for preparing propylene oxide proceeds by (a) reacting propene with hydrogen peroxide in a reaction apparatus in the presence acetonitrile as solvent, obtaining a stream S0 containing propylene oxide, acetonitrile, water, at least one further component B; (b) separating propylene oxide from S0, obtaining stream S1 containing acetonitrile, water and B; (c) dividing S1 into streams S2 and S3; (d) subjects S3 to vapor-liquid fractionation in a first fractionation unit, obtaining vapor fraction stream S4a being depleted, relative to S3, of at least one of B and obtaining liquid bottoms stream S4b, and subjecting at least part of vapor fraction stream S4a to vapor-liquid fractionation in a second fractionation unit, obtaining vapor fraction stream S4c and liquid bottoms stream S4 being depleted, relative to S4a, of at least one of B; (e) recycling at least a portion of S4 to (a).Type: GrantFiled: October 27, 2015Date of Patent: June 11, 2019Assignees: BASF SE, DOW GLOBAL TECHNOLOGIES LLCInventors: Joaquim Henrique Teles, Dominic Riedel, Bianca Seelig, Philip Kampe, Markus Weber, Alexander Schroeder, Andrei-Nicolae Parvulescu, Ulrich Mueller, Daniel Urbanczyk, Meinolf Weidenbach, Werner J. Witzl, Holger Baer
-
Publication number: 20190169149Abstract: The present invention is related to a process for preparing propylene oxide, comprising (i) providing a stream comprising propene, hydrogen peroxide or a source of hydrogen peroxide, water, and an organic solvent; (ii) passing the liquid feed stream provided in (i) into an epoxidation zone comprising an epoxidation catalyst comprising a titanium zeolite, and subjecting the liquid feed stream to epoxidation reaction conditions in the epoxidation zone, obtaining a reaction mixture comprising propene, propylene oxide, water, and the organic solvent; (iii) removing an effluent stream from the epoxidation zone, the effluent stream comprising propylene oxide, water, organic solvent, and propene; (iv) separating propene from the effluent stream by distillation, comprising (iv.Type: ApplicationFiled: July 19, 2017Publication date: June 6, 2019Applicants: BASF SE, Dow Global Technologies LLCInventors: Joaquim Henrique TELES, Marvin KRAMP, Christian MUELLER, Nicolai Tonio WOERZ, Bernd METZEN, Tobias KELLER, Dominic RIEDEL, Heiner SCHELLING, Markus WEBER, Daniel URBANCZYK, Andrei-Nicolae PARVULESCU, Ulrike WEGERLE, Ulrich MUELLER, Meinolf WEIDENBACH, Werner J. WITZL, Karsten LUECKE
-
Patent number: 10195598Abstract: The invention relates to process for the regeneration of a catalyst comprising a titanium containing zeolite as catalytically active material comprising a stage comprising introducing a feed stream comprising propene, hydrogen peroxide or a hydrogen peroxide source, and an organic solvent into a reactor containing a catalyst comprising the titanium containing zeolite, subjecting the feed stream in the reactor to epoxidation conditions in the presence of the catalyst, removing a product steam comprising propylene oxide and the organic solvent from the reactor, stopping introducing the feed stream, washing the catalyst with a liquid aqueous system and calcining the washed catalyst.Type: GrantFiled: February 12, 2016Date of Patent: February 5, 2019Assignees: BASF SE, Dow Global Technologies LLCInventors: Dominic Riedel, Joaquim Henrique Teles, Daniel Urbanczyk, Ulrike Wegerle, Luise Spiske, Andrei-Nicolae Parvulescu, Alexander Schroeder, Ulrich Mueller, Meinolf Weidenbach, Werner J. Witzl
-
Publication number: 20180036723Abstract: The invention relates to process for the regeneration of a catalyst comprising a titanium containing zeolite as catalytically active material comprising a stage comprising introducing a feed stream comprising propene, hydrogen peroxide or a hydrogen peroxide source, and an organic solvent into a reactor containing a catalyst comprising the titanium containing zeolite, subjecting the feed stream in the reactor to epoxidation conditions in the presence of the catalyst, removing a product steam comprising propylene oxide and the organic solvent from the reactor, stopping introducing the feed stream, washing the catalyst with a liquid aqueous system and calcining the washed catalyst.Type: ApplicationFiled: February 12, 2016Publication date: February 8, 2018Applicants: BASF SE, Dow Global Technologies LLCInventors: Dominic RIEDEL, Joaquim Henrique TELES, Daniel URBANCZYK, Ulrike WEGERLE, Luise SPISKE, Andrei-Nicolae PARVULESCU, Alexander SCHROEDER, Ulrich MUELLER, Meinolf WEIDENBACH, Werner J. WITZL
-
Patent number: 9732054Abstract: A continuous process for the preparation of propylene oxide, comprising (a) reacting propene, optionally admixed with propane, with hydrogen peroxide in a reaction apparatus in the presence of acetonitrile as solvent, obtaining a stream S0 containing propylene oxide, acetonitrile, water, at least one further component B, optionally propene and optionally propane, wherein the normal boiling point of the at least one component B is higher than the normal boiling point of acetonitrile and wherein the decadic logarithm of the octanol-water partition coefficient (log Kow) of the at least one component B is greater than zero; (b) separating propylene oxide from S0, obtaining a stream S1 containing acetonitrile, water and the at least one further component B; (c) dividing S1 into two streams S2 and S3; (d) subjecting S3 to a vapor-liquid fractionation in a fractionation unit, obtaining a vapor fraction stream S4 being depleted of the at least one component B; (e) recycling at least a portion of S4, optionally afterType: GrantFiled: August 24, 2016Date of Patent: August 15, 2017Assignees: BASF SE, Dow Global Technologies LLCInventors: Joaquim Henrique Teles, Dominic Riedel, Bianca Seelig, Philip Kampe, Daniel Urbanczyk, Markus Weber, Alexander Schroeder, Andrei-Nicolae Parvulescu, Ulrich Mueller, Meinolf Weidenbach, Werner J. Witzl, Holger Baer
-
Patent number: 5523425Abstract: In a process for producing a chlorohydrin an olefinically unsaturated compound is reacted with chlorine in the presence of water. Water is applied as a film on a solid support in a reaction zone and/or water droplets are dispersed in the reaction zone. The reaction is conducted at a pressure of up to about 10 bar.Type: GrantFiled: December 21, 1994Date of Patent: June 4, 1996Assignee: The Dow Chemical CompanyInventors: Gunther A. Pech, Werner J. Witzl