Patents by Inventor Georg Thiele
Georg Thiele 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: 7141683Abstract: A process for the epoxidation of olefins which includes i) reacting an olefin with hydrogen peroxide in presence of an epoxidation catalyst and an alcoholic solvent; ii) separating product olefin oxide and unreacted olefin from the reaction product of step i); iii) recovering a stream comprising the alcoholic solvent; and iv) subjecting the recovered stream of step iii) to hydrogenation.Type: GrantFiled: May 2, 2003Date of Patent: November 28, 2006Assignees: Degussa AG, Uhde GmbHInventors: Thomas Haas, Georg Thiele, Gerald Moroff, Norbert Ullrich, Willi Hofen, Guido Stochniol, Hubertus Eickhoff, Werner Pohl, Wolfgang Wöll, Claudia Brasse, José Berges, Percy Kampeis
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Patent number: 7049450Abstract: A process for the purification of a crude propene oxide containing methanol and acetaldehyde by a continuously operated extractive distillation using an extraction solvent lowering the volatility of methanol and feeding a compound containing an unsubstituted NH2 group capable of reacting with acetaldehyde to a distillation column at a point above the feeding point of the crude propene oxide to give a purified propene oxide containing less than 100 ppm methanol and less than 100 ppm acetaldehyde. There is also disclosed a process for the catalytic epoxidation of propene that includes this purification stage.Type: GrantFiled: November 26, 2003Date of Patent: May 23, 2006Assignees: Degussa AG, UHDE GmbHInventors: Willi Hofen, Thomas Haas, Wolfgang Wöll, Georg Thiele
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Patent number: 6838572Abstract: A continuous process for the epoxidation of olefins with hydrogen peroxide in the presence of a heterogeneous catalyst promoting the epoxidation reaction, whereby the aqueous reaction mixture contains i) an olefin; ii) hydrogen peroxide; iii) less than 100 wppm of alkali metals, earth alkali metals, both irrespective whether in ionic, complex or covalently bonded form, bases or cations of bases having a pkB of less than 4.5, or combinations thereof; and, iv) at least 100 wppm of bases or cations of bases having a pkB of at least 4.5 or combinations thereof, whereby the wppm are based on the total weight of hydrogen peroxide in the reaction mixture.Type: GrantFiled: September 24, 2003Date of Patent: January 4, 2005Assignees: Degussa AG, Uhde GmbHInventors: Thomas Haas, Claudia Brasse, Guido Stochniol, Willi Hofen, Wolfgang Wöll, Georg Thiele
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Publication number: 20040127730Abstract: A continuous process for the epoxidation of olefins with hydrogen peroxide in the presence of a heterogeneous catalyst promoting the epoxidation reaction, whereby the aqueous reaction mixture contains i) an olefin; ii) hydrogen peroxide; iii) less than 100 wppm of alkali metals, earth alkali metals, both irrespective whether in ionic, complex or covalently bonded form, bases or cations of bases having a pkB of less than 4.5, or combinations thereof; and, iv) at least 100 wppm of bases or cations of bases having a pkB of at least 4.5 or combinations thereof, whereby the wppm are based on the total weight of hydrogen peroxide in the reaction mixture.Type: ApplicationFiled: September 24, 2003Publication date: July 1, 2004Inventors: Thomas Haas, Claudia Brasse, Guido Stochniol, Willi Hofen, Wolfgang Woll, Georg Thiele
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Patent number: 6749668Abstract: A process for the recovery of combustible components of a gas stream containing the combustible components and oxygen by selective absorption of the combustible components in a solvent, whereby during the absorption the gas phase is dispersed in a continuous liquid phase of the solvent. In a preferred embodiment the process is applied to give a process for the epoxidation of propene with hydrogen peroxide in the alcoholic solvent in presence of a catalyst, wherein a gas stream including unreacted propene, propene oxide and oxygen from the decomposition of the hydrogen peroxide is separated from the epoxidation reaction mixture and the combustible components in said gas stream are recovered using the process as described above.Type: GrantFiled: June 18, 2002Date of Patent: June 15, 2004Assignees: Degussa AG, Uhde GmbHInventors: Willi Hofen, Georg Thiele, Wolfgang Wöll
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Publication number: 20040106811Abstract: A process for the purification of a crude propene oxide containing methanol and acetaldehyde by a continuously operated extractive distillation using an extraction solvent lowering the volatility of methanol and feeding a compound containing an unsubstituted NH2 group capable of reacting with acetaldehyde to a distillation column at a point above the feeding point of the crude propene oxide to give a purified propene oxide containing less than 100 ppm methanol and less than 100 ppm acetaldehyde. There is also disclosed a process for the catalytic epoxidation of propene that includes this purification stage.Type: ApplicationFiled: November 26, 2003Publication date: June 3, 2004Inventors: Willi Hofen, Thomas Haas, Wolfgang Woll, Georg Thiele
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Patent number: 6720436Abstract: A process for the catalytic epoxidation of olefins in at least one reaction stage comprising: (a) reacting the olefin with hydrogen peroxide in an organic, water-miscible solvent in the presence of a titanium silicalite catalyst in a reactor while continuously feeding an inert gas stream into the reactor, (b) continuously removing an exit gas stream containing olefin oxide, unreacted olefin, oxygen and inert gas from the reactor, (c) bringing the exit gas stream into contact in an absorption unit with the same solvent as used in the reaction stage, (d) removing a solvent stream loaded with olefin and olefin oxide from the absorption unit and (e) discharging an gas stream containing oxygen and the inert gas from the absorption unit.Type: GrantFiled: March 7, 2003Date of Patent: April 13, 2004Assignees: Degussa AG, Uhde GmbHInventors: Willi Hofen, Georg Thiele, Thomas Haas, Wolfgang Wöll, Percy Kampeis, Bärbel Kolbe
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Patent number: 6710193Abstract: Microporous and mesoporous metal silicates are prepared by the hydrothermal reaction of a silicon and metal source in the presence of a template. The choice of raw materials influences the purity and hence the catalytic activity of the products. A pyrogenic mixed oxide is used as the silicon and metal source. Prepared products have the composition (SiO2)1-x(AmOn)x, where A is Ti, Al, B, V or Zr and x is 0.005 to 0.1. Shaped objects of the microporous and mesoporous metal silicates are obtained directly by using a shaped object of the pyrogenic mixed oxide. The products obtained are used as oxidation catalysts.Type: GrantFiled: August 17, 2001Date of Patent: March 23, 2004Assignee: Degussa AGInventors: Steffen Hasenzahl, Helmut Mangold, Eckehart Roland, Mario Scholz, Georg Thiele
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Publication number: 20040006239Abstract: A process for the epoxidation of olefins which includesType: ApplicationFiled: May 2, 2003Publication date: January 8, 2004Inventors: Thomas Haas, Georg Thiele, Gerald Moroff, Norbert Ullrich, Willi Hofen, Guido Stochniol, Hubertus Eickhoff, Werner Pohl, Wolfgang Woll, Claudia Brasse, Jose Berges, Percy Kampeis
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Patent number: 6670492Abstract: The invention described herein relates to a process for the catalytic epoxidation of olefins with hydrogen peroxide in a continuous flow reaction system, wherein a gaseous phase containing an olefin and a liquid phase containing the hydrogen peroxide is present in the reaction system and the gaseous phase flows in countercurrent to the liquid phase.Type: GrantFiled: October 4, 2002Date of Patent: December 30, 2003Assignees: Degussa AG, UHDE GmbHInventors: Willi Hofen, Georg Thiele
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Publication number: 20030212282Abstract: A process for the catalytic epoxidation of olefins in at least one reaction stage comprising:Type: ApplicationFiled: March 7, 2003Publication date: November 13, 2003Inventors: Willi Hofen, Georg Thiele, Thomas Haas, Wolfgang Woll, Percy Kampeis, Barbel Kolbe
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Patent number: 6646141Abstract: The present invention relates to a process for the working up of a product stream from the epoxidation of olefins that contains olefin, olefin oxide, water-miscible organic solvent and water, by separating this product stream into an overhead product containing olefin, olefin oxide and organic solvent, and into a bottom product containing organic solvent and water, wherein the separation takes place in a pre-evaporator with at most 5 theoretical separation stages, and 20 to 60% of the total amount of organic solvent introduced with the product stream is removed with the overhead product and the residue remains in the bottom product, as well as a process for the epoxidation of olefins that includes this working up stage.Type: GrantFiled: October 4, 2002Date of Patent: November 11, 2003Assignees: Degussa AG, UHDE GmbHInventors: Willi Hofen, Georg Thiele, Alexander Möller
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Patent number: 6624319Abstract: The present invention relates to a process for the catalytic epoxidation of olefins in which in one reaction stage the olefin is reacted with aqueous hydrogen peroxide in an organic, water-miscible solvent in the presence of a titanium silicalite catalyst, wherein an exit gas stream is obtained which contains olefin oxide, unreacted olefin and oxygen and this exit gas stream is brought into contact in an absorption unit with the same solvent as used in the reaction stage and a solvent stream loaded with olefin and olefin oxide is drawn off from the absorption unit and an exit gas stream containing oxygen is discharged.Type: GrantFiled: October 4, 2002Date of Patent: September 23, 2003Assignees: Degussa AG, Uhde GmbHInventors: Willi Hofen, Georg Thiele
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Patent number: 6610865Abstract: A process for the catalytic epoxidation of olefins with hydrogen peroxide in a continuous flow reaction system, wherein the reaction mixture includes at least one liquid phase which is passed through a fixed catalyst bed positioned between parallel heat exchange plates and the reaction heat is at least partially removed during the course of the reaction by passing a cooling medium through the heat exchange plates.Type: GrantFiled: August 15, 2001Date of Patent: August 26, 2003Assignee: Degussa AGInventors: Willi Hofen, Georg Thiele
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Patent number: 6608219Abstract: A process for the catalytic epoxidation of olefins with hydrogen peroxide in a multiphase reaction mixture comprising a liquid aqueous hydrogen peroxide rich phase containing an organic solvent having a solubility in water of at least 10% by weight at 25° C. and a liquid organic olefin rich phase.Type: GrantFiled: June 13, 2002Date of Patent: August 19, 2003Assignees: Degussa AG, Uhde GmbHInventors: Thomas Haas, Willi Hofen, Georg Thiele, Stefan Pilz, Wolfgang Woell
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Patent number: 6600055Abstract: A process for the catalytic epoxidation of olefins with hydrogen peroxide in a continuous flow reaction system, wherein the reaction mixture is passed through a fixed catalyst bed within a reactor equipped with cooling means while maintaining a temperature profile within the reactor such that the cooling medium temperature of the cooling means is at least 40° C. and the maximum temperature within the catalyst bed is 60° C. at most.Type: GrantFiled: June 13, 2002Date of Patent: July 29, 2003Assignees: Degussa AG, Uhde GmbHInventors: Thomas Haas, Willi Hofen, Jörg Sauer, Georg Thiele
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Patent number: 6596881Abstract: A process for the catalytic epoxidation of olefins with hydrogen peroxide in a continuous flow reaction system, wherein the reaction mixture is passed through a fixed catalyst bed in down-flow operation mode and the reaction heat is at least partially removed during the course of the reaction.Type: GrantFiled: June 13, 2002Date of Patent: July 22, 2003Assignees: Degussa AG, Uhde GmbHInventors: Thomas Haas, Willi Hofen, Georg Thiele, Jörg Sauer
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Patent number: 6596883Abstract: A process for the working up of a product stream from the epoxidation of olefins that contains olefin, olefin oxide, water-miscible organic solvent and water, by separating this product stream into an overhead product containing olefin, olefin oxide and organic solvent, and into a bottom product containing organic solvent and water, wherein the separation takes place in a pre-evaporator with less than 10 theoretical separation stages at a pressure of 1.5 to less than 3 bar, and 20 to 60% of the total amount of organic solvent introduced with the product stream is removed with the overhead product and the balance remains in the bottom product. A process for the epoxidation of olefins that includes this working up stage is also disclosed.Type: GrantFiled: August 23, 2002Date of Patent: July 22, 2003Assignee: Degussa AGInventors: Willi Hofen, Thomas Haas, Wolfgang Wöll, Georg Thiele
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Publication number: 20030114694Abstract: The present invention relates to a process for the working up of a product stream from the epoxidation of olefins that contains olefin, olefin oxide, water-miscible organic solvent and water, by separating this product stream into an overhead product containing olefin, olefin oxide and organic solvent, and into a bottom product containing organic solvent and water, wherein the separation takes place in a pre-evaporator with at most 5 theoretical separation stages, and 20 to 60% of the total amount of organic solvent introduced with the product stream is removed with the overhead product and the residue remains in the bottom product, as well as a process for the epoxidation of olefins that includes this working up stage.Type: ApplicationFiled: October 4, 2002Publication date: June 19, 2003Inventors: Willi Hofen, Georg Thiele, Alexander Moller
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Publication number: 20030109725Abstract: The present invention relates to a process for the catalytic epoxidation of olefins in which in one reaction stage the olefin is reacted with aqueous hydrogen peroxide in an organic, water-miscible solvent in the presence of a titanium silicalite catalyst, wherein an exit gas stream is obtained which contains olefin oxide, unreacted olefin and oxygen and this exit gas stream is brought into contact in an absorption unit with the same solvent as used in the reaction stage and a solvent stream loaded with olefin and olefin oxide is drawn off from the absorption unit and an exit gas stream containing oxygen is discharged.Type: ApplicationFiled: October 4, 2002Publication date: June 12, 2003Inventors: Willi Hofen, Georg Thiele