公开(公告)号：US20230256396A1

公开(公告)日：2023-08-17

申请号：US18030684

申请日：2021-03-04

Applicant: DALIAN UNIVERSITY OF TECHNOLOGY

Inventor： Jianhua YANG ,  Linzhe LI ,  Ying LU ,  Gaohong HE ,  Jinming LU ,  Yan ZHANG

IPC: B01D67/00 ,  B01D71/02

CPC classification number: B01D67/0048 ,  B01D71/0281 ,  B01D67/0051

Abstract: In a method for preparing a zeolite CHA membrane, a gel conversion method is adopted to assist crystallization, seed solutions with different concentrations and sizes are successively coated on the surface of a porous support to obtain a seed layer, a synthetic gel is coated on the seed layer to obtain a gel layer, and then the porous support is subjected to a membrane crystallization reaction to obtain a zeolite CHA membrane. The method skips the conventional stage of converting the heterogeneous zeolite into the zeolite CHA seed, and directly takes a heterogeneous zeolite with the same secondary structural unit as that of zeolite CHA as a seed to directly prepare a zeolite CHA membrane on a support.