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：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.