公开(公告)号：US20230312357A1

公开(公告)日：2023-10-05

申请号：US18044607

申请日：2021-09-10

Applicant: BASF CORPORATION

Inventor： Ming Ming WEI ,  Shi LIHUA ,  Vivek VATTIPALLI ,  Li MENGLU ,  Liu HAITAO ,  Li JIN

IPC: C01B39/48 ,  B01D53/94

CPC classification number: C01B39/48 ,  B01D53/9418 ,  B01D2257/40 ,  B01D2255/50 ,  C01P2004/32 ,  C01P2004/45

Abstract: Disclosed herein is a process for preparing a zeolite material having an AFX framework structure including X2O3 and YO2 via interzeolite conversion, the process including (1) providing a mixture including a first zeolite material having a non-FAU framework structure including X2O3 and YO2 and an organic structure directing agent selected from the group consisting of diquaternary ammonium cation containing compounds, and (2) heating the mixture from (1) to form a second zeolite material having an AFX framework structure including X2O3 and YO2, wherein X is a trivalent element and Y is a tetravalent element, and where the organic structure directing agent is not 1,4-bis(1,4-diazabicyclo[2.2.2]octane)butyl dihydroxide when the first material zeolite has a CHA framework structure. Further disclosed herein is the zeolite material having an AFX framework structure as obtainable or obtained from the process, and a method of using the same as a catalytically active material.

公开(公告)号：US20210387145A1

公开(公告)日：2021-12-16

申请号：US17309151

申请日：2019-10-24

Applicant: BASF Corporation

Inventor： Stefan MAURER ,  Jia Di ZHANG ,  Yu DAI ,  Yu Fen HAO ,  Ming Ming WEI ,  Teng SHEN

IPC: B01D53/94 ,  B01J29/76 ,  B01J35/04 ,  B01J35/00 ,  B01J37/02 ,  B01J35/10 ,  B01J23/40 ,  F01N3/10 ,  F01N3/28 ,  F01N3/20

Abstract: The present invention relates generally to the field of exhaust treatment systems for purifying exhaust gas discharged from a lean burn engine. The exhaust treatment system comprises a Diesel Oxidation Catalyst (DOC), a Catalyzed Soot Filter (CSF), a reductant injector, an AEI zeolite based Selective Catalyzed Reduction (SCR) catalyst and an Ammonia Oxidation Catalyst (AMOX) downstream to the AEI zeolite based SCR catalyst.