公开(公告)号：US20240382938A1

公开(公告)日：2024-11-21

申请号：US18690126

申请日：2022-09-08

Applicant: BASF CORPORATION

Inventor： Lihua SHI ,  Xiaoduo QI ,  Vivek VATTIPALLI ,  Yu DAI ,  Mingming WEI ,  Haitao LIU ,  Jin LI

IPC: B01J29/76 ,  B01D53/94 ,  B01J37/00 ,  B01J37/02 ,  B01J37/03 ,  B01J37/04 ,  C01B39/48 ,  F01N3/20 ,  F01N3/28

Abstract: A process for preparing a zeolite having a CHA-type framework structure, the framework structure comprising X2O3 and YO2, wherein X is a trivalent element and Y is a tetravalent element, which includes (1) preparing a synthesis mixture comprising (A) a source for X2O3, (B) a source for YO2, and (C) a source for piperidinium cations represented by formula (I) wherein R1a is selected from C1-C8 alkyl and C3-C10 cycloalkyl, R1b is selected from C2-C8 alkyl and C3-C10 cycloalkyl, and R2, R3, R4, R5 and R6 independently from each other, are H, hydroxyl or C1-C8 alkyl; and (2) subjecting the synthesis mixture to crystallization conditions to form a CHA zeolite.

公开(公告)号：US20220032277A1

公开(公告)日：2022-02-03

申请号：US17309015

申请日：2019-10-30

Applicant: BASF Corporation

Inventor： Matthias PETER ,  Karifala DUMBUYA ,  Miriam SCHUBERT ,  Ahmad MOINI ,  Yu DAI ,  Stefan MAURER ,  Haiyang ZHU ,  Yi LIU ,  Wen-Mei XUE ,  Ming-Ming WEI ,  Maria HEENEMANN

IPC: B01J29/76 ,  B01J37/04 ,  B01J37/08 ,  B01J37/02 ,  B01D53/94

Abstract: A process for preparing a catalyst comprising a zeolitic material comprising copper, the process comprising (i) preparing an aqueous mixture comprising water, a zeolitic material comprising copper, a source of copper other than the zeolitic material comprising copper, and a non-zeolitic oxidic material selected from the group consisting of alumina, silica, titania, zirconia, ceria, a mixed oxide comprising one or more of Al, Si, Ti, Zr, and Ce and a mixture of two or more thereof; (ii) disposing the mixture obtained in (i) on the surface of the internal walls of a substrate comprising an inlet end, an outlet end, a substrate axial length extending from the inlet end to the outlet end and a plurality of passages defined by internal walls of the substrate extending therethrough; and optionally drying the substrate comprising the mixture disposed thereon; (iii) calcining the substrate obtained in (ii).

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.