公开(公告)号：US20230081351A1

公开(公告)日：2023-03-16

申请号：US18055708

申请日：2022-11-15

Applicant: BASF Corporation

Inventor： Ivor BULL ,  Wen-Mei XUE ,  Patrick BURK ,  R. Samuel BOORSE ,  William M. JAGLOWSKI ,  Gerald Stephen KOERMER ,  Ahmad MOINI ,  Joseph A. PATCHETT ,  Joseph C. DETTLING ,  Matthew Tyler CAUDLE

IPC: B01J29/72 ,  B01J29/068 ,  B01D53/56 ,  B01D53/94 ,  B01J23/42 ,  B01J23/89 ,  B01J29/072 ,  B01J29/76 ,  B01J35/00 ,  B01J35/04 ,  B01J37/02 ,  B01J29/74 ,  B01D53/86 ,  B01J29/06 ,  B01J29/80 ,  C01B39/46

Abstract: Zeolite catalysts and systems and methods for preparing and using zeolite catalysts having the CHA crystal structure are disclosed. The catalysts can be used to remove nitrogen oxides from a gaseous medium across a broad temperature range and exhibit hydrothermal stable at high reaction temperatures. The zeolite catalysts include a zeolite carrier having a silica to alumina ratio from about 15:1 to about 256:1 and a copper to alumina ratio from about 0.25:1 to about 1:1.