Patents by Inventor Ina Grisstede
Ina Grisstede 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: 8709365Abstract: The invention relates to a catalytically active particulate filter which, in addition to the properties typical of particulate filters, has hydrogen sulphide block function, and to a process for removing nitrogen oxides and particulates from the exhaust gas of internal combustion engines operated predominantly under lean conditions (so-called “lean-burn engines”) using the inventive catalytically active particulate filter. This particulate filter comprises a filter body, a copper compound and an oxidation-catalytic active coating which comprises at least one catalytically active platinum group metal. The copper compound is in a second coating applied to the filter body. The two functional coatings may be applied to the filter body consecutive in the direction of flow, i.e. zoned, or layered one on top of the other.Type: GrantFiled: July 8, 2010Date of Patent: April 29, 2014Assignee: Umicore AG & Co. KGInventors: Franz Dornhaus, Stephanie Frantz, Ina Grisstede
-
Publication number: 20130202507Abstract: The present invention relates to a method for the treatment of an exhaust gas comprising NOx, wherein the method comprises the step of subjecting the exhaust gas to an exhaust gas treatment system comprising, in order of the exhaust stream: (a) a first NOx storage catalytic converter (2, 2?); (b) a catalytic converter (3) for selective catalytic reduction (SCR) downstream of the first NOx storage catalytic converter; and (C) a catalytic converter (4) having oxygen storage capacity downstream of the SCR catalytic converter; wherein the exhaust gas treatment system is operated in alternating rich and lean phases, wherein the rich phase is terminated when the amount of reducing components leaving the first NOx storage catalytic converter is at least 0.Type: ApplicationFiled: November 10, 2008Publication date: August 8, 2013Inventors: Stephan Echoff, Ruediger Hoyer, Susanne Philipp, Ina Grisstede, Wilfried Mueller, Friedemann Rohr
-
Patent number: 8383544Abstract: Nitrogen oxide storage catalysts are used to remove the nitrogen oxides present in the lean exhaust gas of lean-burn engines. As a result of the stress due to high temperatures in vehicle operation, they are subject to thermal aging processes which affect both the nitrogen oxide storage components and the noble metals present as catalytically active components. The present invention provides a process with which the catalytic activity of a nitrogen oxide storage catalyst which comprises, in addition to platinum as a catalytically active component, basic compounds of strontium and/or barium on a support material comprising cerium oxide, said catalytic activity being lost owing to the thermal aging process, can be at least partly restored. The two-stage process is based on the fact that strontium and/or barium compounds formed during the thermal aging with the support material, which also comprise platinum, are recycled to the catalytically active forms by controlled treatment with specific gas mixtures.Type: GrantFiled: April 16, 2008Date of Patent: February 26, 2013Assignee: Umicore AG & Co., KGInventors: Stephan Eckhoff, Meike Wittrock, Ulrich Goebel, Ina Grisstede, Ruediger Hoyer, Wilfried Mueller, Thomas Kreuzer, Maria Cristina Casapu, Jan-Dierk Grunwaldt, Marek Maciejewski, Aflons Baiker
-
Patent number: 8327625Abstract: To adhere to legal exhaust-gas regulations, the exhaust gases of a lean-burn engine must be freed from soot particles and nitrogen oxides. It is proposed that the cylinders of the lean-burn engine be divided into two groups which discharge their exhaust gases into two associated exhaust lines which each comprise a soot filter and which are merged at an opening-in point into a common exhaust line. The common exhaust line comprises the catalytic converter for the removal of the nitrogen oxides. By regenerating the two soot filters at different times, the exhaust-gas temperature in the common exhaust line is limited to a mean temperature between the exhaust-gas temperature of normal operation and that of regeneration operation, and the catalytic converter for the removal of the nitrogen oxides is preserved.Type: GrantFiled: January 31, 2008Date of Patent: December 11, 2012Assignee: Umicore AG & Co. KGInventors: Stephan Eckhoff, Ina Grisstede, Wilfried Mueller, Thomas Kreuzer
-
Publication number: 20110014099Abstract: The invention relates to a catalytically active particulate filter which, in addition to the properties typical of particulate filters, has hydrogen sulphide block function, and to a process for removing nitrogen oxides and particulates from the exhaust gas of internal combustion engines operated predominantly under lean conditions (so-called “lean-burn engines”) using the inventive catalytically active particulate filter. This particulate filter comprises a filter body, a copper compound and an oxidation-catalytic active coating which comprises at least one catalytically active platinum group metal. The copper compound is in a second coating applied to the filter body. The two functional coatings may be applied to the filter body consecutive in the direction of flow, i.e. zoned, or layered one on top of the other.Type: ApplicationFiled: July 8, 2010Publication date: January 20, 2011Applicant: UMICORE AG & CO.KGInventors: Franz DORNHAUS, Stephanie Frantz, Ina Grisstede
-
Publication number: 20100233051Abstract: Nitrogen oxide storage catalysts are used to remove nitrogen oxides from the exhaust gas of internal combustion engines operated predominantly under lean burn conditions. When these catalysts are used in diesel vehicles, the increased sulfur content in the fuel during operation results in poisoning of the catalyst, which is reversible at high temperatures under reduced exhaust gas conditions. In the case of conventional nitrogen oxide storage catalysts, temperatures of more than 600° C. have to be obtained for desulfurization. This is not always possible in diesel vehicles with a nitrogen oxide storage catalyst in the underbody area. The invention presents a process whose application allows the desulfurization temperature of conventional nitrogen oxide storage catalysts which comprise a platinum component and at least one nitrogen oxide storage material to be lowered. The basicity of the chemical environment of the platinum is lowered, while the nitrogen oxide storage material can remain unchanged as such.Type: ApplicationFiled: April 14, 2010Publication date: September 16, 2010Inventors: Ina GRISSTEDE, Friedemann ROHR, Stephan ECKHOFF, Wilfried MUELLER, Thomas KREUZER
-
Publication number: 20100101210Abstract: To adhere to legal exhaust-gas regulations, the exhaust gases of a lean-burn engine must be freed from soot particles and nitrogen oxides. It is proposed that the cylinders of the lean-burn engine be divided into two groups which discharge their exhaust gases into two associated exhaust lines which each comprise a soot filter and which are merged at an opening-in point into a common exhaust line. The common exhaust line comprises the catalytic converter for the removal of the nitrogen oxides. By regenerating the two soot filters at different times, the exhaust-gas temperature in the common exhaust line is limited to a mean temperature between the exhaust-gas temperature of normal operation and that of regeneration operation, and the catalytic converter for the removal of the nitrogen oxides is preserved.Type: ApplicationFiled: January 31, 2008Publication date: April 29, 2010Applicant: UMICORE AG & CO. KGInventors: Stephan Eckhoff, Ina Grisstede, Wilfried Mueller, Thomas Kreuzer
-
Publication number: 20100055012Abstract: Nitrogen oxide storage catalysts are used to remove nitrogen oxides from the exhaust gas of internal combustion engines operated predominantly under lean burn conditions. When these catalysts are used in diesel vehicles, the increased sulfur content in the fuel during operation results in poisoning of the catalyst, which is reversible at high temperatures under reduced exhaust gas conditions. In the case of conventional nitrogen oxide storage catalysts, temperatures of more than 600° C. have to be obtained for desulfurization. This is not always possible in diesel vehicles with a nitrogen oxide storage catalyst in the underbody area. The invention presents a process whose application allows the desulfurization temperature of conventional nitrogen oxide storage catalysts which comprise a platinum component and at least one nitrogen oxide storage material to be lowered. The basicity of the chemical environment of the platinum is lowered, while the nitrogen oxide storage material can remain unchanged as such.Type: ApplicationFiled: August 30, 2007Publication date: March 4, 2010Inventors: Ina Grisstede, Friedemann Rohr, Stephan Eckhoff, Wilfried Mueller, Thomas Kreuzer
-
Patent number: 7253310Abstract: A process for preparing (meth)acrylic acid by heterogeneously catalyzed gas phase partial oxidation of a saturated hydrocarbon precursor compound, in which the charging gas mixture contains from 5 to 25% by volume of steam and the molar ratio of molecular oxygen present in the charging gas mixture to saturated hydrocarbon precursor compound present in the charging gas mixture is from 1.5:1 to 2.5:1.Type: GrantFiled: August 18, 2004Date of Patent: August 7, 2007Assignee: BASF AktiengesellschaftInventors: Frieder Borgmeier, Frank Rosowski, Hans-Guenther Lintz, Ina Grisstede, Elisabet Bacells Cabre
-
Patent number: 7019169Abstract: A process for preparing (meth)acrylic acid by conducting a saturated hydrocarbon precursor compound through a catalyst bed I whose catalysts I have, as the active composition, a multimetal oxide I which has a specific X-ray diffractogram and contains the elements Mo and V, at least one of the elements Te and Sb, and also at least one of the elements from the group consisting of Nb, Ta, W, Ce and Ti, wherein the catalyst bed I is interrupted by at least one catalyst bed II whose catalysts II have, as the active composition, a multimetal oxide II which contains the elements Mo, Bi and Fe.Type: GrantFiled: September 7, 2004Date of Patent: March 28, 2006Assignee: BASF AktiengesellschaftInventors: Frieder Borgmeier, Frank Rosowski, Hans-Günther Lintz, Ina Grisstede
-
Publication number: 20050065370Abstract: A process for preparing (meth)acrylic acid by conducting a saturated hydrocarbon precursor compound through a catalyst bed I whose catalysts I have, as the active composition, a multimetal oxide I which has a specific X-ray diffractogram and contains the elements Mo and V, at least one of the elements Te and Sb, and also at least one of the elements from the group consisting of Nb, Ta, W, Ce and Ti, wherein the catalyst bed I is interrupted by at least one catalyst bed II whose catalysts II have, as the active composition, a multimetal oxide II which contains the elements Mo, Bi and Fe.Type: ApplicationFiled: September 7, 2004Publication date: March 24, 2005Applicant: BASF AktiengesellschaftInventors: Frieder Borgmeier, Frank Rosowski, Hans-Gunther Lintz, Ina Grisstede
-
Publication number: 20050043567Abstract: A process for preparing (meth)acrylic acid by heterogeneously catalyzed gas phase partial oxidation of a saturated hydrocarbon precursor compound, in which the charging gas mixture contains from 5 to 25% by volume of steam and the molar ratio of molecular oxygen present in the charging gas mixture to saturated hydrocarbon precursor compound present in the charging gas mixture is from 1.5:1 to 2.5:1.Type: ApplicationFiled: August 18, 2004Publication date: February 24, 2005Applicant: BASF AktiengesellschaftInventors: Frieder Borgmeier, Frank Rosowski, Hans-Gunther Lintz, Ina Grisstede, Elisabet Cabre