Patents by Inventor Wolfgang Lorenz
Wolfgang Lorenz 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: 10551820Abstract: A method for calculating an optimized trajectory via a simulation program and an optimization routine, wherein the trajectory is provided via the simulation program and adapted to boundary conditions, where the method includes a loop in which, as individual steps, a first trajectory is provided, a further trajectory, and the adaptation of the further trajectory is modified based on the boundary conditions, such that the optimized trajectory is a trajectory which has been provided based on an extremal or predetermined parameter, where the optimized trajectory is provided after the calculation by a control device for moving a holder for a component, and where at least one component and the production machine are displayed in a 3D display.Type: GrantFiled: June 1, 2016Date of Patent: February 4, 2020Assignee: Siemens AktiengesellschaftInventors: Alexandre Bonay, Stephan Hoja, Frank Knoche, Michael Meier, Ulrich Wolfgang Lorenz, Stephan Schaeufele
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Patent number: 10040753Abstract: Methods for the preparation of diisocyanates by the reaction of the corresponding primary diamines with phosgene in the gas phase are described, wherein the pressure in the diamine evaporation chamber during the transfer of the diamine into the gas phase is less than the pressure in the reaction chamber during the reaction to the diisocyanates, and wherein the pressure difference between the diamine evaporation chamber and the reaction chamber prior to the mixing of diamine and phosgene is overcome by a pressure-increasing element.Type: GrantFiled: June 7, 2016Date of Patent: August 7, 2018Assignee: COVESTRO DEUTSCHLAND AGInventors: Peter Lehner, Rainer Bruns, Wolfgang Lorenz
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Publication number: 20180179149Abstract: The invention relates to a method for the preparation of diisocyanates by the reaction of the corresponding primary diamines with phosgene in the gas phase, wherein the pressure in the diamine evaporation chamber during the transfer of the diamine into the gas phase is less than the pressure in the reaction chamber during the reaction to the diisocyanates, and wherein the pressure difference between the diamine evaporation chamber and the reaction chamber prior to the mixing of diamine and phosgene is overcome by a pressure-increasing element.Type: ApplicationFiled: June 7, 2016Publication date: June 28, 2018Inventors: Peter Lehner, Rainer Bruns, Wolfgang Lorenz
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Publication number: 20180150056Abstract: A method for calculating an optimized trajectory via a simulation program and an optimization routine, wherein the trajectory is provided via the simulation program and adapted to boundary conditions, where the method includes a loop in which, as individual steps, a first trajectory is provided, a further trajectory, and the adaptation of the further trajectory is modified based on the boundary conditions, such that the optimized trajectory is a trajectory which has been provided based on an extremal or predetermined parameter, where the optimized trajectory is provided after the calculation by a control device for moving a holder for a component, and where at least one component and the production machine are displayed in a 3D display.Type: ApplicationFiled: June 1, 2016Publication date: May 31, 2018Inventors: Alexandre Bonay, Stephan HOJA, Frank KNOCHE, Michael MEIER, Ulrich Wolfgang LORENZ, Stephan SCHAEUFELE
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Patent number: 9896407Abstract: The invention relates to a method for producing dinitrotoluene, comprising the following steps: a) nitrating toluene with a mixture of nitric acid and sulfuric acid and subsequently separating a sulfuric-acid-containing aqueous phase that arises in the nitration, wherein a raw dinitrotoluene is obtained, b) washing the raw dinitrotoluene in a water wash with neutral and/or alkaline washing water, wherein a pre-cleaned dinitrotoluene, which contains at least water in addition to dinitrotoluene, is obtained after the washing water used in the last wash has been separated, and c) separating the water from the pre-cleaned dinitrotoluene, d) collecting the waste water from steps a), b), and/or c), e) optionally extracting the collected waste water from step d) with toluene and returning the thus obtained organic phase to step a), f) freeing the collected waste water from step d), or, if the optional step e) is performed, the extracted waste water from step e), of toluene in a toluene stripper, wherein a toluene-coType: GrantFiled: September 29, 2015Date of Patent: February 20, 2018Assignee: Covestro Deutschland AGInventors: Thomas Knauf, Jürgen Münnig, Wolfgang Lorenz, Bernd Pennemann
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Patent number: 9874868Abstract: A method for calculating an optimized trajectory with a simulation program and an optimization routine includes making available a trajectory and adjusting it to boundary conditions, implementing a loop having the steps of a provision of one first trajectory, a modification of a (further) trajectory and adjustment of the (further) trajectory on the basis of boundary conditions, using as the optimized trajectory a trajectory which has been made available on the basis of an extremal or predetermined parameter, and, after being calculated, making available the optimized trajectory to a control device in order to move a holder for a component part.Type: GrantFiled: June 2, 2015Date of Patent: January 23, 2018Assignee: SIEMENS AKTIENGESELLSCHAFTInventors: Ulrich Wolfgang Lorenz, Stephan Schäufele
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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: 20170291869Abstract: The invention relates to a method for producing dinitrotoluene, comprising the following steps: a) nitrating toluene with a mixture of nitric acid and sulfuric acid and subsequently separating a sulfuric-acid-containing aqueous phase that arises in the nitration, wherein a raw dinitrotoluene is obtained, b) washing the raw dinitrotoluene in a water wash with neutral and/or alkaline washing water, wherein a pre-cleaned dinitrotoluene, which contains at least water in addition to dinitrotoluene, is obtained after the washing water used in the last wash has been separated, and c) separating the water from the pre-cleaned dinitrotoluene, d) collecting the waste water from steps a), b), and/or c), e) optionally extracting the collected waste water from step d) with toluene and returning the thus obtained organic phase to step a), f) freeing the collected waste water from step d), or, if the optional step e) is performed, the extracted waste water from step e), of toluene in a toluene stripper, wherein a toluene-coType: ApplicationFiled: September 29, 2015Publication date: October 12, 2017Inventors: Thomas KNAUF, Jürgen MÜNNIG, Wolfgang LORENZ, Bernd PENNEMANN
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Patent number: 9695115Abstract: The invention relates to a method for preparing isocyanates by phosgenating the corresponding amines, wherein low-boiling secondary components, excess phosgene, and the co-product hydrogen chloride are separated from the crude liquid isocyanate stream, which is obtained after the phosgenation has occurred, within a maximum of 60 minutes, and wherein the crude liquid isocyanate stream is not exposed to temperatures above 250° C. until said separation.Type: GrantFiled: September 7, 2016Date of Patent: July 4, 2017Assignee: Covestro Deutschland AGInventors: Rainer Bruns, Wolfgang Lorenz, Andreas Karl Rausch, Stefan Wershofen, Tim Loddenkemper
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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: 9593075Abstract: The invention relates to a method for preparing isocyanates by phosgenating the corresponding amines, wherein low-boiling secondary components, excess phosgene, and the co-product hydrogen chloride are separated from the crude liquid isocyanate stream, which is obtained after the phosgenation has occurred, within a maximum of 60 minutes, and wherein the crude liquid isocyanate stream is not exposed to temperatures above 250° C. until said separation.Type: GrantFiled: March 15, 2013Date of Patent: March 14, 2017Assignee: Covestro Deutschland AGInventors: Rainer Bruns, Wolfgang Lorenz, Andreas Karl Rausch, Stefan Wershofen, Tim Loddenkemper
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Publication number: 20160376228Abstract: The invention relates to a method for preparing isocyanates by phosgenating the corresponding amines, wherein low-boiling secondary components, excess phosgene, and the co-product hydrogen chloride are separated from the crude liquid isocyanate stream, which is obtained after the phosgenation has occurred, within a maximum of 60 minutes, and wherein the crude liquid isocyanate stream is not exposed to temperatures above 250° C. until said separation.Type: ApplicationFiled: September 7, 2016Publication date: December 29, 2016Inventors: Rainer Bruns, Wolfgang Lorenz, Andreas Karl Rausch, Stefan Wershofen, Tim Loddenkemper
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Patent number: 9480958Abstract: The invention relates to a device (R) for producing phosgene by reacting chlorine and carbon monoxide in the presence of a fixed-bed catalyst, comprising a) a tube bundle, which is arranged inside a reactor jacket (4) and which has a plurality of reaction tubes (3), which are arranged substantially parallel to each other and which extend from a lower tube sheet (2) to an upper tube sheet (2), and b) a coolant space for a cooling fluid, which coolant space surrounds the reaction tubes (3) and is defined by the lower tube sheet (1), the upper tube sheet (2), and the reactor jacket (4), wherein the device is characterized in that the tube bundle is enclosed by an annular-space sheet (7), which defines an inner annular space (12) for the passage of the cooling fluid and which is arranged at a distance from both the lower tube sheet (1) and the upper tube sheet (2), wherein an outer annular space (13) for feeding liquid cooling fluid through is formed between the annular-space sheet (7) and the reactor jacket (4),Type: GrantFiled: July 9, 2013Date of Patent: November 1, 2016Assignee: Covestro Deutschland AGInventors: Ulrich Hollmann, Friedhelm Steffens, Wolfgang Lorenz, Thomas Runowski
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Patent number: 9416094Abstract: The invention relates to a method for producing diamines and polyamines of the diphenylmethane series in which, by using a coalescence auxiliary in the phase separation of the process product obtained in the scrubbing of the neutralized crude product, the fraction of water and thus also of water-soluble impurities in the organic MDA-containing phase is reduced. According to the invention, the coalescence auxiliary used is a filter bed made of coalescence fiber material. The di- and polyamines of the diphenylmethane series obtained after distillative purification of this MDA-containing organic phase are exceptionally suitable for the preparation of the corresponding isocyanates.Type: GrantFiled: April 8, 2014Date of Patent: August 16, 2016Assignee: Covestro Deutschland AGInventors: Thomas Knauf, Wolfgang Lorenz, Stefan Wershofen, Richard Adamson, Karsten Becker
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Patent number: 9365503Abstract: Meta-toluene-diisocyanate is produced by reacting meta-toluenediamine with phosgene in the gas phase. The meta-toluenediamine to be vaporized for use in this phosgenation process must contain less than 0.5 wt. % of toluenediamine residue, a total of less than 0.2 wt. % of ammonia and cycloaliphatic amines, and less than 20 ppm of heavy metals. At least 0.1 wt. % of the liquid meta-toluenediamine being to be vaporized must not be vaporized. This non-vaporized content of the meta-toluenediamine must not be fed to the phosgenation reactor.Type: GrantFiled: December 14, 2009Date of Patent: June 14, 2016Assignee: Covestro Deutschland AGInventors: Klaus Biskup, Rainer Bruns, Wolfgang Lorenz, Lars Padeken, Bernd Pennemann, Fritz Pohl, Andreas Rausch, Friedhelm Steffens
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Patent number: 9328064Abstract: The invention relates to a process for the preparation of isocyanates by reaction of the corresponding amines with phosgene in the gas phase, wherein a diluent containing between 90.0000% by weight and 99.9999% by weight of substances which are inert in the phosgenation process and between 0.0001% by weight and 10.0000% by weight of oxygen is present during the conversion of the amine into the gas phase and the molar ratio of amine to oxygen (O2) is ?1,000:1.Type: GrantFiled: July 2, 2015Date of Patent: May 3, 2016Assignee: Bayer MaterialScience AGInventors: Rainer Bruns, Wolfgang Lorenz, Andreas Karl Rausch, Stefan Wershofen, Tim Loddenkemper
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Patent number: 9309184Abstract: The invention relates to a method for producing diamines and polyamines of the diphenylmethane series, wherein first aniline and formaldehyde are reacted in the absence of an acidic catalyst to form a reaction mixture containing animal and water and, after the water has been separated the aminal is reacted by acid catalysis to form a reaction mixture containing diamines and polyamines of the diphenylmethane series, wherein the separation of the water from the aminal is supported by the use of a coalescence aid. According to the invention, a filter bed made front coalescence fiber material is used an coalescence aid.Type: GrantFiled: April 9, 2014Date of Patent: April 12, 2016Assignee: Covestro Deutschland AGInventors: Thomas Knauf, Wolfgang Lorenz, Stefan Wershofen, Richard Adamson, Karsten Becker
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Publication number: 20160068475Abstract: The invention relates to a method for producing diamines and polyamines of the diphenylmethane series, wherein first aniline and formaldehyde are reacted in the absence of an acidic catalyst to form a reaction mixture containing aminal and water and, after the water has been separated the aminal is reacted by acid catalysis to form a reaction mixture containing diamines and polyamines of the diphenylmethane series, wherein the separation of the water from the aminal is supported by the use of a coalescence aid. According to the invention, a filter bed made from coalescence fiber material is used an coalescence aid.Type: ApplicationFiled: April 9, 2014Publication date: March 10, 2016Inventors: Thomas Knauf, Wolfgang Lorenz, Stefan Wershofen, Richard Adamson, Karsten Becker