177results about How to "Increased pure water flux" patented technology

The invention relates to a preparation method and application of a hierarchical porous molecular sieve membrane. A mesoporous structure guiding agent is added to limit the growth of a molecular sieve crystal, and is subjected to self-assembly in a crystallization process of the molecular sieve crystal, so as to generate a mesoporous structure. The hierarchical porous molecular sieve membrane is synthesized by using a seed crystal inducing secondary nucleation mechanism and a hydrothermal one-step synthesis method; synthesis conditions are mild and controllable, the simplicity in preparation and good repeatability are realized, energy consumption is reduced, and the cost is reduced. The hierarchical porous molecular sieve membrane prepared by adopting the method shows good retention performance, and the retention molecular weight is controllable between 200 and 500000 Da. The method for preparing the hierarchical porous molecular sieve membrane, provided by the invention, can be used for synthesizing the hierarchical porous molecular sieve membrane with other micropore skeleton structures, and has high cost performance and a broad industrial production prospect; the application of the preparation method also can be popularized to the field of catalysis.