Patents by Inventor Werner Peschel
Werner Peschel 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: 7619098Abstract: Process for the preparation of on-spec phthalic anhydride by the distillative purification of crude phthalic anhydride at reduced pressure, where the crude phthalic anhydride is passed to the distillation column above a side take-off, the low-boiling components are removed at the top of the column or in the vicinity of the top of the column and the on-spec phthalic anhydride is removed from the side take-off of the column, in which a distillation column is used whose number of theoretical plates located above the supply of the crude phthalic anhydride into the distillation column is 10 to 20 and the column is operated at a reflux ratio of from 0.1 to 0.5.Type: GrantFiled: December 31, 2005Date of Patent: November 17, 2009Assignee: BASF AktiengesellschaftInventors: Werner Peschel, Matthias Kummer, Marcus Bechtel
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Patent number: 7547378Abstract: The invention relates to a process for distillatively purifying crude dimethylacetamide (crude DMAc) comprising DMAc, low boilers and high boilers 5 by removing the low boilers and the high boilers to obtain pure DMAc in one of the column configurations listed hereinbelow: (I) a main column (MC) with sidestream column (SC) or (II) a dividing wall column (DWC), which operating at least the main column (MC) in column configuration (I) and the dividing wall column (DWC) in column configuration (II) at a top pressure in the range from 0.5 to 1.8 bar absolute.Type: GrantFiled: April 5, 2004Date of Patent: June 16, 2009Assignee: BASF AktiengesellschaftInventors: Werner Peschel, Hartmut Schoenmakers, Klaus Althaus, Tanja Kirchner, Hartmut Staatz
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Publication number: 20080207925Abstract: Process for the preparation of on-spec phthalic anhydride by the distillative purification of crude phthalic anhydride at reduced pressure, where the crude phthalic anhydride is passed to the distillation column above a side take-off, the low-boiling components are removed at the top of the column or in the vicinity of the top of the column and the on-spec phthalic anhydride is removed from the side take-off of the column, in which a distillation column is used whose number of theoretical plates located above the supply of the crude phthalic anhydride into the distillation column is 10 to 20 and the column is operated at a reflux ratio of from 0.1 to 0.5.Type: ApplicationFiled: December 31, 2005Publication date: August 28, 2008Applicant: Basf AktiengesellschaftInventors: Werner Peschel, Matthias Kummer, Marcus Bechtel
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Publication number: 20060219545Abstract: The invention relates to a process for distillatively purifying crude dimethylacetamide (crude DMAc) comprising DMAc, low boilers and high boilers 5 by removing the low boilers and the high boilers to obtain pure DMAc in one of the column configurations listed hereinbelow: (I) a main column (MC) with sidestream column (SC) or (II) a dividing wall column (DWC), which comprises operating at least the main column (MC) in column configuration (I) and the dividing wall column (DWC) in column configuration (II) at a top pressure in the range from 0.5 to 1.8 bar absolute.Type: ApplicationFiled: April 5, 2004Publication date: October 5, 2006Applicant: BASF AKTIENGESELLSCHAFTInventors: Werner Peschel, Hartmut Schoenmakers, Klaus Althaus, Tanja Kirchner, Hartmut Staatz
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Patent number: 6943274Abstract: A process for preparing cyclohexanol from benzene by: a) preparing cyclohexene by hydrogenating benzene in the presence of a catalyst, and b) preparing cyclohexanol by hydrating the cyclohexene in the presence of a catalyst, comprises: carrying out steps a) and b) in a reaction facility which has a bottom region at the lower end, a top region at the upper end, and a reaction zone between the top region and the bottom region which contains the catalyst according to steps a) and b), evaporating a portion of the benzene using the heat of reaction in the reaction zone, condensing it in the top region and returning it to the reaction zone, and withdrawing a reaction mixture containing cyclohexanol in the bottom region.Type: GrantFiled: February 28, 2003Date of Patent: September 13, 2005Assignee: BASF AktiengesellschaftInventors: Werner Peschel, Till Adrian, Harald Rust, Arnd Böttcher, Thomas Hill, Ulrich Müller, Rainer Papp
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Publication number: 20050148803Abstract: A process for preparing cyclohexanol from benzene by a) preparing cyclohexene by hydrogenating benzene in the presence of a catalyst and b) preparing cyclohexanol by hydrating the cyclohexene in the presence of a catalyst, comprises carrying out steps a) and b) in a reaction facility which has a bottom region at the lower end, a top region at the upper end and a reaction zone between the top region and the bottom region which contains the catalyst according to steps a) and b), evaporating a portion of the benzene using the heat of reaction in the reaction zone, condensing it in the top region and returning it to the reaction zone, and withdrawing a reaction mixture containing cyclohexanol in the bottom region.Type: ApplicationFiled: February 28, 2003Publication date: July 7, 2005Inventors: Werner Peschel, Till Adrian, Harald Rust, Arnd Bottcher, Thomas Hill, Ulrich Muller, Rainer Papp
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Patent number: 6696610Abstract: A continuous process for the preparation of monoethanolamine, diethanolamine and triethanolamine by reacting ammonia and ethylene oxide in liquid phase in the presence of water as catalyst in a pressure column is proposed, where, as a result of the heat of the reaction, some of the ammonia evaporates, condenses at the head of the column and is again charged to the column, the reaction mixture at the bottom end of the pressure column is drawn off and then separated, the pressure column is constructed as a reactive distillation column (I) with evaporator at the bottom (S) and where, by means of inputting energy via the evaporator at the bottom (S), the weight ratio of monoethanolamine to diethanolamine to triethanolamine is controlled and, via the ratio of ammonia to ethylene oxide in the feed to the reactive distillation column (I), the ammonia proportion in the bottom product from the reactive distillation column (I) is controlled.Type: GrantFiled: August 27, 2002Date of Patent: February 24, 2004Assignee: BASF AktiengesellschaftInventors: Werner Peschel, Axel Hildebrandt, Bernd Bessling
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Patent number: 6570026Abstract: On-spec phthalic anhydride is prepared by distillative purification of crude phthalic anhydride by a process in which crude phthalic anhydride is fed to a distillation column which is operated at reduced pressure, the low boilers are removed at the top or in the vicinity of the top of the distillation column and the on-spec phthalic anhydride is removed from the column via a side take-off.Type: GrantFiled: February 19, 2002Date of Patent: May 27, 2003Assignee: BASF AktiengesellschaftInventors: Werner Peschel, Bernd Bessling, Peter Reuter, Peter Michael Lorz, Bernhard Ulrich, Jean Werner Knab, Matthias Kummer, Thomas Rühl
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Publication number: 20030065224Abstract: A continuous process for the preparation of monoethanolamine, diethanolamine and triethanolamine by reacting ammonia and ethylene oxide in liquid phase in the presence of water as catalyst in a pressure column is proposed, where, as a result of the heat of the reaction, some of the ammonia evaporates, condenses at the head of the column and is again charged to the column, the reaction mixture at the bottom end of the pressure column is drawn off and then separated, the pressure column is constructed as a reactive distillation column (I) with evaporator at the bottom (S) and where, by means of inputting energy via the evaporator at the bottom (S), the weight ratio of monoethanolamine to diethanolamine to triethanolamine is controlled and, via the ratio of ammonia to ethylene oxide in the feed to the reactive distillation column (I), the ammonia proportion in the bottom product from the reactive distillation column (I) is controlled.Type: ApplicationFiled: August 27, 2002Publication date: April 3, 2003Inventors: Werner Peschel, Axel Hildebrandt, Bernd Bebetaling
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Patent number: 6414191Abstract: The present invention relates to a process for the continuous preparation of methoxyamine hydrochloride by cleavage of acetone oxime methyl ether by means of hydrogen chloride and water, wherein the cleavage is carried out in a reaction column having less than 20 theoretical plates and the amount taken off at the top is set to at least 30% of the amount of feed.Type: GrantFiled: September 11, 2001Date of Patent: July 2, 2002Assignee: BASF AktiengesellschaftInventors: Frank Heimann, Werner Peschel, Bernd Bartenbach, Horst Hartmann, Michael Keil, Josef Wahl
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Patent number: 5048396Abstract: In the neutral position of a directional control valve in which the connection of the constant pump to the consumer is interrupted the entire delivery of the constant pump is led via a bypass valve to the tank. According to the invention the regulating range of the bypass valve is increased by an additional connection which is controlled by a further piston which in the neutral position of the directional control valve is displaced by a weak spring into the open position and thus ensures a pressureless circulation of the pump working medium to the tank.Type: GrantFiled: June 29, 1988Date of Patent: September 17, 1991Assignee: Mannesmann Rexroth GmbHInventors: Heinz Torkler, Werner Peschel
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Patent number: 4862691Abstract: Speed regulation of pump drive is set by a pressure-regulating valve providing a constant control pressure for a plurality of normal loads. If a high fluid consumption load such as the lifting cylinder of a forklift truck is to be simultaneously actuated the pump speed and net volumetric displacement must be increased. A higher speed-regulating control pressure from the pressure-regulating valve is required. The control valve for the high consumption load has a spool with an extending inclined cam contacting the biasing spring of the pressure-regulating valve. Upon actuation of this control valve the preload of the biasing spring is increased thereby adjusting the speed-regulating control pressure output of the pressure regulating valve. The pump engine or drive speed and the net volumetric displacement are increased.Type: GrantFiled: April 22, 1988Date of Patent: September 5, 1989Assignee: Mannesmann Rexroth GmbHInventor: Werner Peschel