US 12,011,693 B2
Zeolite membrane and preparation method thereof
Zhiwei Wang, Shanghai (CN); Wei Shi, Shanghai (CN); Huimin Zhou, Shanghai (CN); and Xueye Wang, Shanghai (CN)
Assigned to TONGJI UNIVERSITY, Shanghai (CN)
Filed by Tongji University, Shanghai (CN)
Filed on May 21, 2021, as Appl. No. 17/326,365.
Claims priority of application No. 202110039872.9 (CN), filed on Jan. 13, 2021.
Prior Publication US 2022/0219126 A1, Jul. 14, 2022
Int. Cl. B01D 71/02 (2006.01); B01D 67/00 (2006.01); B01D 69/02 (2006.01); B01D 69/10 (2006.01); B01D 69/14 (2006.01); B01D 71/34 (2006.01); C02F 1/44 (2023.01); C02F 101/16 (2006.01); C02F 101/38 (2006.01)
CPC B01D 71/028 (2013.01) [B01D 67/0079 (2013.01); B01D 67/0083 (2013.01); B01D 67/0095 (2013.01); B01D 69/02 (2013.01); B01D 69/10 (2013.01); B01D 69/148 (2013.01); B01D 71/34 (2013.01); C02F 1/44 (2013.01); B01D 2323/08 (2013.01); B01D 2323/12 (2013.01); B01D 2323/14 (2013.01); B01D 2325/04 (2013.01); C02F 2101/16 (2013.01); C02F 2101/38 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A method for preparing a zeolite membrane, comprising the following steps:
1) adding an organic binder solution dropwise to a zeolite to obtain a mixture, and thoroughly grinding and stirring the mixture;
2) blade-coating the mixture obtained in step 1) on a substrate to obtain a substrate coated with a zeolite membrane matrix, wherein the substrate is at least one selected from the group consisting of a metal mesh with a pore size less than 0.1 mm, a microfiltration (MF) membrane and an ultrafiltration (UF) membrane, wherein the MF membrane or the UF membrane comprises a polyvinyl chloride (PVC) membrane, a polyethersulfone (PES) membrane, a polypropylene (PP) membrane, a polysulfone (PSF) membrane, a polytetrafluoroethylene (PTFE) membrane, or a polyvinylidene fluoride (PVDF) membrane; and
3) drying the substrate coated with the zeolite membrane matrix obtained in step 2) at 40° C. in air for 12 h to obtain the zeolite membrane.