US 12,330,953 B2
Synthesis method for directly preparing H-type molecular sieve having CHA framework type and use thereof
Kaixiang Li, Tianjin (CN); Zhenguo Li, Tianjin (CN); Xiaoning Ren, Tianjin (CN); Congjie Lv, Tianjin (CN); Jianhai Wang, Tianjin (CN); Lingfeng Jia, Tianjin (CN); Yuankai Shao, Tianjin (CN); and Cheng Lv, Tianjin (CN)
Assigned to CHINA AUTOMOTIVE TECHNOLOGY AND RESEARCH CENTER CO., LTD, Tianjin (CN); and CATARC AUTOMOTIVE TEST CENTER (TIANJIN) CO., LTD, Tianjin (CN)
Filed by CHINA AUTOMOTIVE TECHNOLOGY AND RESEARCH CENTER CO., LTD, Tianjin (CN); and CATARC AUTOMOTIVE TEST CENTER (TIANJIN) CO., LTD, Tianjin (CN)
Filed on Jun. 20, 2023, as Appl. No. 18/337,461.
Application 18/337,461 is a continuation of application No. PCT/CN2022/113796, filed on Aug. 21, 2022.
Claims priority of application No. 202110985026.6 (CN), filed on Aug. 26, 2021.
Prior Publication US 2023/0339767 A1, Oct. 26, 2023
Int. Cl. B01J 29/85 (2006.01); C01B 39/48 (2006.01)
CPC C01B 39/48 (2013.01) [C01P 2002/72 (2013.01)] 3 Claims
 
1. A synthesis method for directly preparing a molecular sieve having the CHA framework using a structure-directing agent, comprising the following steps:
Step 1, mixing and stirring the structure-directing agent with water until the mixture is clear, adding an aluminum sol, and stirring to form a sol-gel, wherein an active ingredient of the aluminum sol comprises Al2O3;
Step 2, adding a silicon source and a seed crystal into the sol-gel, stirring evenly, then transferring to a hydrothermal synthesis reactor, heating to 155° C.-180° C. in a closed environment, and reacting for 7-48 h to obtain a reaction solution, wherein an active ingredient of the silicon source comprises SiO2, and a molar ratio of the Al2O3, the SiO2, the structure-directing agent, and the deionized water is 1:(0.1-50):(0.1-20):(10-200); and
Step 3, filtering the reaction solution, cleaning a filter cake, and heating to obtain a molecular sieve having the CHA framework;
wherein a chemical formula of the structure-directing agent is (C4H8NO)2PO(C4H10N), and
a structural formula of the structure-directing agent is:

OG Complex Work Unit Chemistry