公开(公告)号：US11931729B2

公开(公告)日：2024-03-19

申请号：US17637094

申请日：2020-08-12

Applicant: BASF CORPORATION

Inventor： Jeff H. Yang ,  Stanley A. Roth ,  Robin M. Huff

IPC: B01J29/76 ,  B01D53/94 ,  B01J35/04 ,  B01J37/02 ,  B01J37/10 ,  B01J37/30 ,  F01N3/10 ,  F01N3/20 ,  F01N3/28 ,  F01N13/00

CPC classification number: B01J29/7615 ,  B01D53/9418 ,  B01J35/04 ,  B01J37/0225 ,  B01J37/10 ,  B01J37/30 ,  F01N3/106 ,  F01N3/2066 ,  F01N3/2803 ,  F01N13/009 ,  B01D2255/20715 ,  B01D2255/20738 ,  B01D2255/502 ,  B01D2255/9155 ,  B01J2229/186 ,  F01N2370/04

Abstract: The present disclosure provides a method of forming a selective catalytic reduction (SCR) catalyst, the method including receiving a first iron-promoted zeolite having a first iron content, and treating the iron-promoted zeolite with additional iron in an ion exchange step to form a second iron-promoted zeolite with a second iron content, the second iron content being higher than the first iron content. A selective catalytic reduction (SCR) catalyst composition including an ironpromoted zeolite having at least about 6 weight percent iron, based on total weight of the ironpromoted zeolite, wherein the iron content of the zeolite was added to the zeolite in at least two separate steps is also provided herein.

公开(公告)号：US11448110B2

公开(公告)日：2022-09-20

申请号：US16323145

申请日：2017-08-04

Applicant: BASF Corporation

Inventor： Wen-Mei Xue ,  Jeff H. Yang ,  Stanley A. Roth ,  Kenneth E. Voss ,  Sandip D. Shah ,  Jaya L. Mohanan

IPC: F01N3/20 ,  B01J29/072 ,  B01J37/02 ,  B01J37/08 ,  B01J35/00 ,  B01J29/76 ,  B01D53/94 ,  B01J29/06 ,  B01J29/068 ,  B01J29/80 ,  B01J29/72 ,  B01J29/74 ,  B01J29/00 ,  B01J29/54 ,  B01J29/56 ,  B01J37/30

Abstract: Certain selective catalytic reduction (SCR) articles, systems and methods provide for high NOx conversion while at the same time low N2O formation. The articles, systems and methods are suitable for instance for the treatment of exhaust gas of diesel engines. Certain articles have zoned coatings containing copper-containing molecular sieves disposed thereon, where for example a concentration of catalytic copper in an upstream zone is lower than the concentration of catalytic copper in a downstream zone.

公开(公告)号：US20190168199A1

公开(公告)日：2019-06-06

申请号：US16323154

申请日：2017-08-04

Applicant: BASF Corporation

Inventor： Jeff H. Yang ,  Wen-Mei Xue ,  Stanley A. Roth ,  Kenneth E. Voss ,  Qi Fu ,  Subramanian Prasad ,  Barbara K. Slawski ,  Jaya L. Mohanan ,  Sandip D. Shah

IPC: B01J29/76 ,  B01J35/00 ,  B01J35/04 ,  B01J37/30 ,  B01J37/06 ,  B01J37/00 ,  B01J37/10 ,  B01J37/02 ,  B01D53/94 ,  F01N3/20 ,  F01N3/035 ,  F01N3/10

Abstract: Certain selective catalytic reduction (SCR) articles, systems and methods provide for high NOx conversion while at the same time low N2O formation. The articles, systems and methods are suitable for instance for the treatment of exhaust gas of diesel engines. Certain articles have zoned coatings disposed thereon, for example, a zoned coating comprising an upstream zone comprising a coating layer comprising a steam-activated iron-containing molecular sieve and a downstream zone comprising a coating layer comprising a high copper-containing molecular sieve.

公开(公告)号：US20240033717A1

公开(公告)日：2024-02-01

申请号：US18266024

申请日：2021-12-08

Applicant: BASF Corporation

Inventor： Jeff H. Yang ,  Wen-Mei Xue ,  Stanley A. Roth

IPC: B01J29/76 ,  B01D53/94 ,  F01N3/28 ,  F01N3/035 ,  B01J37/02 ,  F01N13/00 ,  F01N3/20 ,  F01N3/10 ,  B01J37/30

CPC classification number: B01J29/763 ,  B01D53/944 ,  B01D53/9418 ,  F01N3/2828 ,  F01N3/035 ,  B01J37/0219 ,  F01N13/009 ,  F01N3/2066 ,  F01N3/106 ,  B01D53/9477 ,  B01J37/30 ,  F01N2510/068 ,  B01D2257/404 ,  B01D2255/20738 ,  B01J2229/42 ,  F01N2370/04 ,  B01D2255/50 ,  B01J2229/186 ,  B01D2258/01 ,  B01D2255/20761

Abstract: The present disclosure relates to a process for preparing a catalyst for the selective catalytic reduction of nitrogen oxide. The process includes providing a zeolitic material including SiO2 and X2O3 in its framework structure, wherein X is a trivalent element; subjecting the zeolitic material to an ion exchange procedure with one or more iron (II) and/or iron (III) containing compounds; preparing a slurry including the Fe ion-exchanged zeolitic material, one or more copper (II) containing compounds, and a solvent system; providing a substrate and coating the slurry onto the substrate; and calcining the coated substrate. Furthermore, the present disclosure relates to a catalyst for the selective catalytic reduction of nitrogen oxide, an exhaust gas treatment system for the treatment of exhaust gas exiting from an internal combustion engine, and a method for the selective catalytic reduction of nitrogen oxides.

公开(公告)号：US20190170042A1

公开(公告)日：2019-06-06

申请号：US16323145

申请日：2017-08-04

Applicant: BASF Corporation

Inventor： Wen-Mei Xue ,  Jeff H. Yang ,  Stanley A. Roth ,  Kenneth E. Voss ,  Sandip D. Shah ,  Jaya L. Mohanan

IPC: F01N3/20 ,  B01D53/94 ,  B01J29/072 ,  B01J29/76 ,  B01J35/00 ,  B01J37/02 ,  B01J37/08

Abstract: Certain selective catalytic reduction (SCR) articles, systems and methods provide for high NOx conversion while at the same time low N2O formation. The articles, systems and methods are suitable for instance for the treatment of exhaust gas of diesel engines. Certain articles have zoned coatings containing copper-containing molecular sieves disposed thereon, where for example a concentration of catalytic copper in an upstream zone is lower than the concentration of catalytic copper in a downstream zone.

公开(公告)号：US20240068387A1

公开(公告)日：2024-02-29

申请号：US18266015

申请日：2021-12-08

Applicant: BASF Corporation

Inventor： Jeff H. Yang ,  Wen-Mei Xue ,  Stanley A. Roth

IPC: F01N3/20 ,  B01D53/94 ,  B01J29/072 ,  B01J37/02 ,  B01J37/08 ,  B01J37/30 ,  F01N3/035 ,  F01N3/10 ,  F01N13/00

CPC classification number: F01N3/2066 ,  B01D53/9418 ,  B01J29/072 ,  B01J37/0215 ,  B01J37/08 ,  B01J37/30 ,  F01N3/035 ,  F01N3/106 ,  F01N13/009 ,  B01D2255/50 ,  B01D2258/01 ,  F01N2250/02 ,  F01N2570/14

Abstract: The present disclosure relates to a process for preparing a catalyst for the selective catalytic reduction of nitrogen oxide. The process includes providing a zeolitic material comprising SiO2 and X2O3 in its framework structure, wherein X is a trivalent element; subjecting the zeolitic material to an ion exchange procedure with one or more copper (II) containing compounds; preparing a slurry comprising the Cu ion-exchanged zeolitic material, one or more iron (II) and/or iron (III) containing compounds, and a solvent system; providing a substrate and coating the slurry onto the substrate; and calcining the coated substrate. Furthermore, the present disclosure relates to a catalyst for the selective catalytic reduction of nitrogen oxide, an exhaust gas treatment system for the treatment of exhaust gas exiting from an internal combustion engine, and a method for the selective catalytic reduction of nitrogen oxides.

公开(公告)号：US20220280924A1

公开(公告)日：2022-09-08

申请号：US17637094

申请日：2020-08-12

Applicant: BASF CORPORATION

Inventor： Jeff H. Yang ,  Stanley A. Roth ,  Robin M. Huff

IPC: B01J29/76 ,  B01J35/04 ,  B01J37/30 ,  B01J37/10 ,  B01J37/02 ,  F01N3/28 ,  F01N13/00 ,  F01N3/20 ,  F01N3/10 ,  B01D53/94

Abstract: The present disclosure provides a method of forming a selective catalytic reduction (SCR) catalyst, the method including receiving a first iron-promoted zeolite having a first iron content, and treating the iron-promoted zeolite with additional iron in an ion exchange step to form a second iron-promoted zeolite with a second iron content, the second iron content being higher than the first iron content. A selective catalytic reduction (SCR) catalyst composition including an ironpromoted zeolite having at least about 6 weight percent iron, based on total weight of the ironpromoted zeolite, wherein the iron content of the zeolite was added to the zeolite in at least two separate steps is also provided herein.

公开(公告)号：US11344868B2

公开(公告)日：2022-05-31

申请号：US16323154

申请日：2017-08-04

Applicant: BASF Corporation

Inventor： Jeff H. Yang ,  Wen-Mei Xue ,  Stanley A. Roth ,  Kenneth E. Voss ,  Qi Fu ,  Subramanian Prasad ,  Barbara K. Slawski ,  Jaya L. Mohanan ,  Sandip D. Shah

IPC: B01J29/072 ,  B01J29/76 ,  B01J37/02 ,  B01J35/00 ,  B01J37/00 ,  B01D53/94 ,  B01J37/08 ,  C01B39/02 ,  F01N3/20 ,  B01J35/04 ,  B01J37/06 ,  B01J37/10 ,  B01J37/30 ,  F01N3/035 ,  F01N3/10

Abstract: Certain selective catalytic reduction (SCR) articles, systems and methods provide for high NOx conversion while at the same time low N2O formation. The articles, systems and methods are suitable for instance for the treatment of exhaust gas of diesel engines. Certain articles have zoned coatings disposed thereon, for example, a zoned coating comprising an upstream zone comprising a coating layer comprising a steam-activated iron-containing molecular sieve and a downstream zone comprising a coating layer comprising a high copper-containing molecular sieve.