US 11,873,226 B2
Sheet-like particles of zeolite and method for producing same
Yoshiaki Uchida, Kyoto (JP); Koki Sasaki, Ikeda (JP); and Norikazu Nishiyama, Minoh (JP)
Assigned to JAPAN SCIENCE AND TECHNOLOGY AGENCY, Kawaguchi (JP)
Appl. No. 17/617,028
Filed by JAPAN SCIENCE AND TECHNOLOGY AGENCY, Kawaguchi (JP)
PCT Filed Jun. 11, 2020, PCT No. PCT/JP2020/023067
§ 371(c)(1), (2) Date Dec. 7, 2021,
PCT Pub. No. WO2020/250985, PCT Pub. Date Dec. 17, 2020.
Claims priority of application No. 2019-111523 (JP), filed on Jun. 14, 2019.
Prior Publication US 2022/0332594 A1, Oct. 20, 2022
Int. Cl. B01J 20/18 (2006.01); C01B 39/48 (2006.01); C01B 39/28 (2006.01)
CPC C01B 39/48 (2013.01) [C01B 39/28 (2013.01); C01P 2002/01 (2013.01); C01P 2002/74 (2013.01); C01P 2002/85 (2013.01); C01P 2004/04 (2013.01)] 8 Claims
 
1. A method for producing sheet-like particles of zeolite, comprising:
a first step which comprises
forming a bilayer in a solvent,
forming a hyper-swollen lamellar phase of the bilayer by adding, in the solvent, an aluminum atomic source, and at least one atomic source selected from the group consisting of a silicon atomic source and a phosphorus atomic source, and
forming sheet-like particles of a precursor of zeolite between two monomolecular layers, wherein the two monomolecular layers constitute the bilayer and are formed from amphiphilic molecules; and
a second step of bringing the sheet-like particles of the precursor of zeolite into contact with gaseous water in a container to form the sheet-like particles of zeolite,
wherein a thickness of the sheet-like particles of the zeolite is 1 nm or more and 100 nm or less;
an aspect ratio (maximum width/thickness in particles) of the sheet-like particles of the zeolite is 100 or more;
the solvent contained in a whole system in the formation of the hyper-swollen lamellar phase is a mixed solvent containing a hydrocarbon solvent and water, wherein the whole system in the formation of the hyper-swollen lamellar phase means any components which are mixed in order to form the super-swollen lamellar phase and include solutes and solvents; and
a mass ratio of the hydrocarbon-containing solvent and water in the mixed solvent is 85:15 to 99.99:0.01.