US 12,239,965 B2
Process for the production of a zeolitic material having an AEI-type framework structure via solvent-free interzeolitic conversion
Andrei-Nicolae Parvulescu, Ludwigshafen (DE); Yu Dai, Shanghai (CN); Stefan Maurer, Shanghai (CN); Ulrich Mueller, Ludwigshafen (DE); and Indre Thiel, Ludwigshafen (DE)
Assigned to BASF SE, Ludwigshafen am Rhein (DE)
Appl. No. 17/309,182
Filed by BASF SE, Ludwigshafen Am Rhein (DE)
PCT Filed Nov. 15, 2019, PCT No. PCT/CN2019/118884
§ 371(c)(1), (2) Date May 4, 2021,
PCT Pub. No. WO2020/098796, PCT Pub. Date May 22, 2020.
Prior Publication US 2021/0370278 A1, Dec. 2, 2021
Int. Cl. C01B 39/48 (2006.01); B01D 53/94 (2006.01); B01J 29/76 (2006.01); B01J 35/61 (2024.01); B01J 37/08 (2006.01); B01J 37/30 (2006.01)
CPC B01J 29/76 (2013.01) [B01D 53/9418 (2013.01); B01J 35/617 (2024.01); B01J 37/082 (2013.01); B01J 37/30 (2013.01); C01B 39/48 (2013.01); B01D 2255/50 (2013.01); B01J 2229/18 (2013.01); C01P 2004/03 (2013.01)] 7 Claims
 
1. A process for preparing a zeolite material having an AEI-framework structure wherein the framework structure comprises SiO2 and X2O3 and X is a trivalent element, and wherein the process comprises:
(1) preparing a mixture comprising one or more cationic structure directing agent comprising a heterocyclic amine ring, seed crystals, and a first zeolite material comprising SiO2 and X2O3 in the framework structure and having an FAU framework structure, wherein (1) comprises milling the mixture; and
(2) heating the mixture to obtain a second zeolite material comprising SiO2 and X2O3 in its framework structure and having the AEI framework structure;
wherein the mixture prepared in (1) and heated in (2) contains 1000 wt.-% or less of H2O based on 100 wt.-% of SiO2 in the framework structure of the first zeolite material,
wherein the mixture prepared in (1) and heated in (2) further comprises at least one OH source, and an OH−:SiO2 molar ratio of OH− to SiO2 in the framework structure of the first zeolite material is in a range from 0.3 to 0.4,
wherein the one or more cationic structure directing agents are chosen from N,N-di(C1-C4)alkyl-3,5-di(C1-C4)alkylpyrrolidinium, N,N-di(C1-C4)alkyl-3,5-di(C1-C4)alkylpiperidinium, N,N-di(C1-C4)alkyl-3,5-di(C1-C4)alkylhexahydroazepinium, and combinations thereof, and
wherein a molar ratio of trans isomer to cis isomer in the one or more cationic structure directing agents relative to alkyl groups at 3 and 5 positions of the heterocyclic amine ring ranges from 0.01 to 0.3,
Wherein X is chosen from Al, B, In, Ga and combinations thereof.