US 12,220,688 B2
Nano size crystal ZSM-5 and its preparation and applications thereof
Narasimharao Kanna, Bengaluru (IN); Suresh Kumar B, Bengaluru (IN); Hemant Mishra, Bengaluru (IN); and Pramod Kumar, Bengaluru (IN)
Assigned to HINDUSTAN PETROLEUM CORPORATION LIMITED
Filed by HINDUSTAN PETROLEUM CORPORATION LIMITED, Bangalore (IN)
Filed on Mar. 30, 2023, as Appl. No. 18/192,727.
Claims priority of application No. 202341005508 (IN), filed on Jan. 27, 2023.
Prior Publication US 2024/0253027 A1, Aug. 1, 2024
Int. Cl. B01J 37/10 (2006.01); B01J 29/40 (2006.01); B01J 35/40 (2024.01); B01J 35/61 (2024.01); B01J 35/63 (2024.01); B01J 37/00 (2006.01); B01J 37/04 (2006.01); B01J 37/08 (2006.01); B01J 37/30 (2006.01); C10G 11/05 (2006.01)
CPC B01J 37/105 (2013.01) [B01J 29/40 (2013.01); B01J 35/40 (2024.01); B01J 35/615 (2024.01); B01J 35/617 (2024.01); B01J 35/633 (2024.01); B01J 37/0009 (2013.01); B01J 37/04 (2013.01); B01J 37/088 (2013.01); B01J 37/30 (2013.01); C10G 11/05 (2013.01); C10G 2300/1074 (2013.01); C10G 2400/02 (2013.01); C10G 2400/06 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A process for synthesizing a nano ZSM-5 catalyst, the process comprising:
(i) adding an aluminum precursor, a quaternary ammonium template and a size controlling agent in an aqueous basic solution in a hydrothermal reactor to obtain a first solution;
(ii) adding a silica precursor to the first solution to obtain a second solution;
(iii) stirring the second solution and then conducting aging to form a reaction mixture;
(iv) heating the reaction mixture in the hydrothermal reactor followed by cooling, then filtering, washing and drying to obtain a solid product; and
(v) calcining the solid product to obtain a calcined product comprising the nano ZSM-5 catalyst,
wherein the size controlling agent comprises phosphino carboxylic acid.