Patents by Inventor Claudia Wendt
Claudia Wendt 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: 9999877Abstract: The present invention relates to a catalyst, which may be used in selective catalytic reduction (SCR), said catalyst comprising one or more zeolites of the BEA structure type, one or more zeolites of the CHA structure type, and optionally one or more zeolites of the MFI structure type, wherein at least part of the one or more zeolites of the BEA structure type contain iron (Fe), wherein at least part of the one or more zeolites of the CHA structure type contain copper (Cu), and wherein at least part of the optional one or more zeolites of the MFI structure type contain iron (Fe). Furthermore, the present invention concerns an exhaust gas treatment system comprising said catalyst as well as a process for the treatment of a gas stream comprising NOx using said catalyst as well.Type: GrantFiled: October 4, 2012Date of Patent: June 19, 2018Assignee: BASF SEInventors: Susanne Stiebels, Claudia Wendt, Torsten Neubauer, Svetlana Zimmermann
-
Patent number: 9662611Abstract: Provided are emissions treatment systems for an exhaust stream having an ammonia-generating component, such as a NOx storage reduction (NSR) catalyst or a lean NOx trap (LNT) catalyst, and an SCR catalyst disposed downstream of the ammonia-generating catalyst. The SCR catalyst can be a molecular sieve having the CHA crystal structure, for example SSZ-13 or SAPO-34, which can be ion-exchanged with copper. The LNT can be layered, having an undercoat washcoat layer comprising a support material, at least one precious metal, and at least one NOx sorbent selected from the group consisting of alkaline earth elements, rare earth elements, and combinations thereof and a top washcoat layer comprising a support material, at least one precious metal, and ceria in particulate form, the top washcoat layer being substantially free of alkaline earth components. The emissions treatment system is advantageously used for the treatment of exhaust streams from diesel engines and lean burn gasoline engines.Type: GrantFiled: March 30, 2010Date of Patent: May 30, 2017Assignee: BASF CorporationInventors: Chung-Zong Wan, Xiaolai Zheng, Suzanne Stiebels, Claudia Wendt, Torsten Neubauer, R. Samuel Boorse
-
Patent number: 9358503Abstract: Provided are emissions treatment systems for an exhaust stream having an ammonia-generating component, such as a NOx storage reduction (NSR) catalyst or a lean NOx trap (LNT) catalyst, and an SCR catalyst disposed downstream of the ammonia-generating catalyst. The SCR catalyst can be a molecular sieve having the CHA crystal structure, for example SSZ-13 or SAPO-34, which can be ion-exchanged with copper. The LNT can be layered, having an undercoat washcoat layer comprising a support material, at least one precious metal, and at least one NOx sorbent selected from the group consisting of alkaline earth elements, rare earth elements, and combinations thereof and a top washcoat layer comprising a support material, at least one precious metal, and ceria in particulate form, the top washcoat layer being substantially free of alkaline earth components. The emissions treatment system is advantageously used for the treatment of exhaust streams from diesel engines and lean burn gasoline engines.Type: GrantFiled: May 9, 2014Date of Patent: June 7, 2016Assignee: BASF CorporationInventors: Chung-Zong Wan, Xiaolai Zheng, Susanne Stiebels, Claudia Wendt, Torsten Neubauer, R. Samuel Boorse
-
Patent number: 9352307Abstract: Described is a catalyst, preferably for use in selective catalytic reduction (SCR), said catalyst comprising one or more zeolites of the MFI structure type, and one or more zeolites of the CHA structure type, wherein at least part of the one or more zeolites of the MFI structure type contain iron (Fe), and wherein at least part of the one or more zeolites of the CHA structure type contain copper (Cu). An exhaust gas treatment system is described, comprising said catalyst as well as a process for the treatment of a gas stream comprising NOx using said catalyst as well.Type: GrantFiled: April 8, 2011Date of Patent: May 31, 2016Assignee: BASF CorporationInventors: Susanne Stiebels, Claudia Wendt, Torsten Neubauer, Martin Dieterle, Jaya L. Mohanan
-
Patent number: 9321009Abstract: Provided are emissions treatment systems for an exhaust stream having an ammonia-generating component, such as a NOx storage reduction (NSR) catalyst or a lean NOx trap (LNT) catalyst, and an SCR catalyst disposed downstream of the ammonia-generating catalyst. The SCR catalyst can be a molecular sieve having the CHA crystal structure, for example SSZ-13 or SAPO-34, which can be ion-exchanged with copper. The LNT can be layered, having an undercoat washcoat layer comprising a support material, at least one precious metal, and at least one NOx sorbent selected from the group consisting of alkaline earth elements, rare earth elements, and combinations thereof and a top washcoat layer comprising a support material, at least one precious metal, and ceria in particulate form, the top washcoat layer being substantially free of alkaline earth components. The emissions treatment system is advantageously used for the treatment of exhaust streams from diesel engines and lean burn gasoline engines.Type: GrantFiled: October 4, 2013Date of Patent: April 26, 2016Assignee: BASF CORPORATIONInventors: Chung-Zong Wan, Xiaolai Zheng, Susanne Stiebels, Claudia Wendt, Torsten Neubauer, R. Samuel Boorse
-
Patent number: 9079162Abstract: Disclosed is a catalyst, preferably for use in selective catalytic reduction (SCR), said catalyst comprising one or more zeolites of the MFI structure type, and one or more zeolites of the BEA structure type, wherein at least part of the one or more zeolites of the MFI structure type and at least part of the one or more zeolites of the BEA structure type respectively contain iron (Fe). Furthermore, an exhaust gas treatment system is described, comprising said catalyst as well as a process for the treatment of a gas stream comprising NOx using said catalyst as well.Type: GrantFiled: April 8, 2011Date of Patent: July 14, 2015Assignees: BASF SE Ludwigshafen, N.E. CHEMCAT CORPORATIONInventors: Susanne Stiebels, Claudia Wendt, Torsten Neubauer, Edith Schneider, Ryuji Ando, Takashi Hihara, Yasuharu Kanno, Makoto Nagata
-
Patent number: 8858891Abstract: Provided are emissions treatment systems for an exhaust stream having an ammonia-generating component, such as a NOx storage reduction (NSR) catalyst or a lean NOx trap (LNT) catalyst, and an SCR catalyst disposed downstream of the ammonia-generating catalyst. The SCR catalyst can be a molecular sieve having the CHA crystal structure, for example SSZ-13 or SAPO-34, which can be ion-exchanged with copper. The LNT can be layered, having an undercoat washcoat layer comprising a support material, at least one precious metal, and at least one NOx sorbent selected from the group consisting of alkaline earth elements, rare earth elements, and combinations thereof and a top washcoat layer comprising a support material, at least one precious metal, and ceria in particulate form, the top washcoat layer being substantially free of alkaline earth components. The emissions treatment system is advantageously used for the treatment of exhaust streams from diesel engines and lean burn gasoline engines.Type: GrantFiled: October 4, 2013Date of Patent: October 14, 2014Assignee: BASF CorporationInventors: Chung-Zong Wan, Xiaolai Zheng, Susanne Stiebels, Claudia Wendt, Torsten Neubauer, R. Samuel Boorse
-
Publication number: 20140248200Abstract: Provided are emissions treatment systems for an exhaust stream having an ammonia-generating component, such as a NOx storage reduction (NSR) catalyst or a lean NOx trap (LNT) catalyst, and an SCR catalyst disposed downstream of the ammonia-generating catalyst. The SCR catalyst can be a molecular sieve having the CHA crystal structure, for example SSZ-13 or SAPO-34, which can be ion-exchanged with copper. The LNT can be layered, having an undercoat washcoat layer comprising a support material, at least one precious metal, and at least one NOx sorbent selected from the group consisting of alkaline earth elements, rare earth elements, and combinations thereof and a top washcoat layer comprising a support material, at least one precious metal, and ceria in particulate form, the top washcoat layer being substantially free of alkaline earth components. The emissions treatment system is advantageously used for the treatment of exhaust streams from diesel engines and lean burn gasoline engines.Type: ApplicationFiled: May 9, 2014Publication date: September 4, 2014Applicant: BASF CorporationInventors: Chung-Zong Wan, Xiaolai Zheng, Susanne Stiebels, Claudia Wendt, Torsten Neubauer, R. Samuel Boorse
-
Publication number: 20140047819Abstract: Provided are emissions treatment systems for an exhaust stream having an ammonia-generating component, such as a NOx storage reduction (NSR) catalyst or a lean NOx trap (LNT) catalyst, and an SCR catalyst disposed downstream of the ammonia-generating catalyst. The SCR catalyst can be a molecular sieve having the CHA crystal structure, for example SSZ-13 or SAPO-34, which can be ion-exchanged with copper. The LNT can be layered, having an undercoat washcoat layer comprising a support material, at least one precious metal, and at least one NOx sorbent selected from the group consisting of alkaline earth elements, rare earth elements, and combinations thereof and a top washcoat layer comprising a support material, at least one precious metal, and ceria in particulate form, the top washcoat layer being substantially free of alkaline earth components. The emissions treatment system is advantageously used for the treatment of exhaust streams from diesel engines and lean burn gasoline engines.Type: ApplicationFiled: October 4, 2013Publication date: February 20, 2014Applicant: BASF SEInventors: Chung-Zong Wan, Xiaolai Zheng, Susanne Stiebels, Claudia Wendt, Torsten Neubauer, R. Samuel Boorse
-
Patent number: 8568674Abstract: Oxidation catalyst composites for the treatment of exhaust gas emissions, such as the abatement of unburned hydrocarbons (HC), and carbon monoxide (CO) and the oxidation of NO to NO2 are disclosed The catalyst composites comprise two washcoat layers containing two different compositions of platinum group metals to optimize the NO2 exiting the catalyst composite. The key to improvement in NO oxidation is to have one catalyst layer that contains Pt while being substantially free of Pd. Methods and systems utilizing the catalyst composites are also disclosed.Type: GrantFiled: August 10, 2012Date of Patent: October 29, 2013Assignee: BASF CorporationInventors: Shiang Sung, Stanley A. Roth, Claudia Wendt, Susanne Stiebels, Helke Doering
-
Publication number: 20110305613Abstract: Disclosed is a catalyst, preferably for use in selective catalytic reduction (SCR), said catalyst comprising one or more zeolites of the MFI structure type, and one or more zeolites of the BEA structure type, wherein at least part of the one or more zeolites of the MFI structure type and at least part of the one or more zeolites of the BEA structure type respectively contain iron (Fe). Furthermore, an exhaust gas treatment system is described, comprising said catalyst as well as a process for the treatment of a gas stream comprising NOx using said catalyst as well.Type: ApplicationFiled: April 8, 2011Publication date: December 15, 2011Applicant: BASF SEInventors: Susanne Stiebels, Claudia Wendt, Torsten Neubauer, Edith Schneider
-
Publication number: 20110305614Abstract: Described is a catalyst, preferably for use in selective catalytic reduction (SCR), said catalyst comprising one or more zeolites of the MFI structure type, and one or more zeolites of the CHA structure type, wherein at least part of the one or more zeolites of the MFI structure type contain iron (Fe), and wherein at least part of the one or more zeolites of the CHA structure type contain copper (Cu). An exhaust gas treatment system is described, comprising said catalyst as well as a process for the treatment of a gas stream comprising NOx using said catalyst as well.Type: ApplicationFiled: April 8, 2011Publication date: December 15, 2011Applicant: BASF CorporationInventors: Susanne Stiebels, Claudia Wendt, Torsten Neubauer, Martin Dieterle, Jaya L. Mohanan
-
Publication number: 20110173950Abstract: Provided are emissions treatment systems for an exhaust stream having an ammonia-generating component, such as a NOx storage reduction (NSR) catalyst or a lean NOx trap (LNT) catalyst, and an SCR catalyst disposed downstream of the ammonia-generating catalyst. The SCR catalyst can be a molecular sieve having the CHA crystal structure, for example SSZ-13 or SAPO-34, which can be ion-exchanged with copper. The LNT can be layered, having an undercoat washcoat layer comprising a support material, at least one precious metal, and at least one NOx sorbent selected from the group consisting of alkaline earth elements, rare earth elements, and combinations thereof and a top washcoat layer comprising a support material, at least one precious metal, and ceria in particulate form, the top washcoat layer being substantially free of alkaline earth components. The emissions treatment system is advantageously used for the treatment of exhaust streams from diesel engines and lean burn gasoline engines.Type: ApplicationFiled: March 30, 2010Publication date: July 21, 2011Applicant: BASF Catalysts LLCInventors: Chung-Zong Wan, Xiaolai Zheng, Susanne Stiebels, Claudia Wendt, Torsten Neubauer, R. Samuel Boorse