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Method for preparing multilayer-structured molecular sieve membrane
The invention provides a method, i.e., periodic secondary growth method for preparing a multilayer-structured molecular sieve membrane. The method comprises the following steps: (1) preparing a seed crystal layer by a dynamic wetting method; (2) preparing a molecular sieve membrane by the periodic secondary growth method; and (3) activating the molecular sieve membrane. Periodic secondary growth means carrying out programmed control on the temperature of a molecular sieve membrane crystallization process, wherein programmed heating, constant-temperature crystallization and programmed cooling are known as a crystallization period, and the crystallization process may comprise a plurality of crystallization periods. Compared with the traditional secondary growth methods, the method has the advantages that the multilayer-structured molecular sieve membrane can be formed by using a periodic crystallization mode. The molecular sieve membrane has the advantage of no pinhole defect and has very good compactness. The method is simple and efficient in process, has very good repeatability and very high success rate and is applicable to industrial amplified application.
Method for preparing multilayer-structured molecular sieve membrane
The invention provides a method, i.e., periodic secondary growth method for preparing a multilayer-structured molecular sieve membrane. The method comprises the following steps: (1) preparing a seed crystal layer by a dynamic wetting method; (2) preparing a molecular sieve membrane by the periodic secondary growth method; and (3) activating the molecular sieve membrane. Periodic secondary growth means carrying out programmed control on the temperature of a molecular sieve membrane crystallization process, wherein programmed heating, constant-temperature crystallization and programmed cooling are known as a crystallization period, and the crystallization process may comprise a plurality of crystallization periods. Compared with the traditional secondary growth methods, the method has the advantages that the multilayer-structured molecular sieve membrane can be formed by using a periodic crystallization mode. The molecular sieve membrane has the advantage of no pinhole defect and has very good compactness. The method is simple and efficient in process, has very good repeatability and very high success rate and is applicable to industrial amplified application.
Method for preparing multilayer-structured molecular sieve membrane
LIU XUGUANG (author) / LIU YONG (author) / WANG ZHUANGRUI (author) / ZHANG BAOQUAN (author)
2015-09-23
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
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