Patents by Inventor Wolfgang Taube
Wolfgang Taube 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: 11020720Abstract: The invention relates to a method for cleaning a phosgene-conducting apparatus by pressurization with ammonia gas to constant pressure. In this way, phosgene residues in the apparatus to be cleaned are decomposed effectively.Type: GrantFiled: September 3, 2018Date of Patent: June 1, 2021Assignee: Covestro Deutschland AGInventors: Wolfgang Taube, Zhangyong Ming, Yiming Mao, Yuguo Gai
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Patent number: 10975020Abstract: A process for quenching, in a quenching zone, a gaseous reaction mixture that includes a diisocyanate, phosgene and hydrogen chloride that is obtained in a reaction zone upstream of the quenching zone by phosgenation of a diamine in the gas phase. The process includes injecting a deposit preventing liquid in a deposit preventing zone located between the reaction zone and the quenching zone by passing the deposit preventing liquid through spray nozzles for the deposit preventing liquid at the entrance to the deposit preventing zone. Each spray nozzle for the deposit preventing liquid sprays the deposit preventing liquid (i) onto a wall segment of the deposit preventing zone that is adjacent to said spray nozzle for the deposit preventing liquid to produce a film of the deposit preventing liquid flowing along the wall, and/or (ii) to areas in a cross-sectional plane of the deposit preventing zone before the entrance to the quenching zone.Type: GrantFiled: September 7, 2018Date of Patent: April 13, 2021Assignee: Covestro Deutschland AGInventors: Yuguo Gai, Zhangyong Ming, Qiang Wei, Joachim Zechlin, Thomas Bludowsky, Wolfgang Taube, Volker Michele
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Patent number: 10858311Abstract: The invention relates to a method for preparing an isocyanate by phosgenating the corresponding primary amine in the gas phase, wherein the gaseous reaction product mixture is cooled by being brought into contact with at least one flow stream of a quenching liquid in a quenching zone, wherein the quenching liquid used in total comprises, based on the total mass, organic solvents in a proportion of maximally 50.0% by mass, and the remainder of up to 100% by mass consists of at least the isocyanate to be produced, thereby obtaining a mixture of the reaction product mixture and the quenching liquid. Furthermore, the mixture obtained in this manner of the reaction product mixture and the quenching liquid is separated into a liquid and a gaseous phase in a collection zone, and a liquid solvent intermediate flow comprising more than 50.Type: GrantFiled: June 6, 2018Date of Patent: December 8, 2020Assignee: Covestro Deutschland AGInventors: Wolfgang Taube, Rainer Bruns, Artur Mausbach
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Publication number: 20200361857Abstract: The present invention provides a process for quenching, in a quenching zone, a gaseous reaction mixture comprising a diisocyanate, phosgene and hydrogen chloride that is obtained in a reaction zone upstream of the quenching zone by phosgenation of a diamine in the gas phase, the process comprising injecting a deposit preventing liquid in a deposit preventing zone located between the reaction zone and the quenching zone by passing the deposit preventing liquid through spray nozzles for the deposit preventing liquid at the entrance to the deposit preventing zone, wherein each spray nozzle for the deposit preventing liquid sprays the deposit preventing liquid (i) onto a wall segment of the deposit preventing zone that is adjacent to said spray nozzle for the deposit preventing liquid to produce a film of the deposit preventing liquid flowing along the wall, and/or (ii) to areas in a cross-sectional plane of the deposit preventing zone before the entrance to the quenching zone.Type: ApplicationFiled: September 7, 2018Publication date: November 19, 2020Inventors: Yuguo Gai, Zhangyong Ming, Qiang Wei, Joachim Zechlin, Thomas Bludowsky, Wolfgang Taube, Volker Michele
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Publication number: 20200222871Abstract: The invention relates to a method for cleaning a phosgene-conducting apparatus by pressurization with ammonia gas to constant pressure. In this way, phosgene residues in the apparatus to be cleaned are decomposed effectively.Type: ApplicationFiled: September 3, 2018Publication date: July 16, 2020Inventors: Wolfgang Taube, Zhangyong Ming, Yiming Mao, Yuguo Gai
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Publication number: 20200131120Abstract: The invention relates to a method for preparing an isocyanate by phosgenating the corresponding primary amine in the gas phase, wherein the gaseous reaction product mixture is cooled by being brought into contact with at least one flow stream of a quenching liquid in a quenching zone, wherein the quenching liquid used in total comprises, based on the total mass, organic solvents in a proportion of maximally 50.0% by mass, and the remainder of up to 100% by mass consists of at least the isocyanate to be produced, thereby obtaining a mixture of the reaction product mixture and the quenching liquid. Furthermore, the mixture obtained in this manner of the reaction product mixture and the quenching liquid is separated into a liquid and a gaseous phase in a collection zone, and a liquid solvent intermediate flow comprising more than 50.Type: ApplicationFiled: June 6, 2018Publication date: April 30, 2020Inventors: Wolfgang TAUBE, Rainer BRUNS, Artur MAUSBACH
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Patent number: 9845286Abstract: This invention relates to a process for operating a gas phase phosgenation plant (100) to form an isocyanate (4) by reacting an amine (2) with phosgene (1), in which the gas phase phosgenation plant is shut down by first stopping the amine stream and still maintaining the phosgene stream. After a period of time which corresponds to at least 10 times the residence time of phosgene (1) in the main parts of the gas phase phosgenation plant (100) in regular operation, calculated from the time at which the amine inflow has been completely stopped, the feed of phosgene is also stopped. An inert gas stream (3) is maintained through the amine and phosgene feeding devices and through all the other essential parts of the gas phase phosgenation plant (100) during the shutdown.Type: GrantFiled: March 24, 2015Date of Patent: December 19, 2017Assignee: Covestro Deutschland AGInventors: Thomas Knauf, Wolfgang Lorenz, Friedhelm Steffens, Rainer Bruns, Wolfgang Taube
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Patent number: 9840461Abstract: This invention relates to a process for operating a gas phase phosgenation plant (100) to form an isocyanate (4) by reacting an amine (2) with phosgene (1), in which the gas phase phosgenation plant is started up by first charging the plant with phosgene. At the same time as, or after the first charge of phosgene, the amine supply devices are rendered inert using a hot inert gas stream (30). Then, amine is admixed for the first time. In this way and by maintaining a pressure drop in the amine and phosgene devices to the mixing zone, the back mixing of phosgene into the amine-containing reactant stream during start-up is prevented.Type: GrantFiled: March 24, 2015Date of Patent: December 12, 2017Assignee: Covestro Deutschland AGInventors: Thomas Knauf, Wolfgang Lorenz, Friedhelm Steffens, Rainer Bruns, Wolfgang Taube
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Publication number: 20170101367Abstract: This invention relates to a process for operating a gas phase phosgenation plant (100) to form an isocyanate (4) by reacting an amine (2) with phosgene (1), in which the gas phase phosgenation plant is started up by first charging the plant with phosgene. At the same time as, or after the first charge of phosgene, the amine supply devices are rendered inert using a hot inert gas stream (30). Then, amine is admixed for the first time. In this way and by maintaining a pressure drop in the amine and phosgene devices to the mixing zone, the back mixing of phosgene into the amine-containing reactant stream during start-up is prevented.Type: ApplicationFiled: March 24, 2015Publication date: April 13, 2017Applicant: COVESTRO DEUTSCHLAND AGInventors: Thomas Knauf, Wolfgang Lorenz, Friedhelm Steffens, Rainer Bruns, Wolfgang Taube
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Publication number: 20170096389Abstract: This invention relates to a process for operating a gas phase phosgenation plant (100) to form an isocyanate (4) by reacting an amine (2) with phosgene (1), in which the gas phase phosgenation plant is shut down by first stopping the amine stream and still maintaining the phosgene stream. After a period of time which corresponds to at least 10 times the residence time of phosgene (1) in the main parts of the gas phase phosgenation plant (100) in regular operation, calculated from the time at which the amine inflow has been completely stopped, the feed of phosgene is also stopped. An inert gas stream (3) is maintained through the amine and phosgene feeding devices and through all the other essential parts of the gas phase phosgenation plant (100) during the shutdown.Type: ApplicationFiled: March 24, 2015Publication date: April 6, 2017Inventors: Thomas Knauf, Wolfgang Lorenz, Friedhelm Steffens, Rainer Bruns, Wolfgang Taube
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Patent number: 5699666Abstract: A steam generating power plant includes a generator connected to a network, a steam turbine driving the generator, a steam bleeder line being connected to the steam turbine and having a load-dependently adjustable valve, a system having a superconducting magnetic energy accumulator and being connected electrically parallel to the generator, and a control unit. The control unit furnishes electrical power directly from the superconducting energy accumulator to level a power deficit lasting on the order of several seconds in the network and the control unit at the same time adjusts the valve to increase steam available to the steam turbine. A process for operating a steam generating power plant, an interlocking electrical network in combination with a number of steam generating power plants, and a process for operating the interlinking network in combination with the steam generating power plants, are also provided.Type: GrantFiled: January 11, 1996Date of Patent: December 23, 1997Assignee: Siemens AktiengesellschaftInventors: Heribert Kurten, Uwe Radtke, Wolfgang Taube, Horst Vollmar
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Patent number: 5507145Abstract: A steam generating power plant includes a generator connected to a network, a steam turbine driving the generator, a steam bleeder line being connected to the steam turbine and having a load-dependently adjustable valve, a system having a superconducting magnetic energy accumulator and being connected electrically parallel to the generator, and a control unit. The control unit furnishes electrical power directly from the superconducting energy accumulator to level a power deficit lasting on the order of several seconds in the network and the control unit at the same time adjusts the valve to increase steam available to the steam turbine. A process for operating a steam generating power plant, an interlocking electrical network in combination with a number of steam generating power plants, and a process for operating the interlinking network in combination with the steam generating power plants, are also provided.Type: GrantFiled: May 23, 1994Date of Patent: April 16, 1996Assignee: Siemens AktiengesellschaftInventors: Heribert Kurten, Uwe Radtke, Wolfgang Taube, Horst Vollmar