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.