Patent · US Active

Method for preparing zeolite CHA membrane

US12121866B2 · kind B2 · utility

0Cited by

1References

8Claims

0Family size

Assignee

Dalian University of Technology · CN

Inventors

Jianhua Yang · Palo Alto, US
Linzhe Li · 东风镇, CN
Ying-Tsung Lu · Hsinchu, TW
Gaohong HE · Dalian, CN
Jinming Lu · 东风镇, CN
Yan Zhang · Cincinnati, US

Key dates

Filing date	Mar 4, 2021
Grant date	Oct 22, 2024
Priority date	—
Expiry date	Mar 29, 2041

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01D71/0281
WIPO fieldChemical engineering
WIPO sectorChemistry

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.