Patent Details

Patent ID: CN201110150248.2

A method for preparing acetic acid dehydration ZSM-5 zeolite membranes

Description: An acid dehydration synthesis ZSM-5 zeolite membrane for a two-step seeded on a macroporous carrier introduced directly into the thin seed layer, using F- as an inorganic structure-directing agent, crystallization liquor regulation Si / Al ratio, prepared by secondary growth out of the legal system 5 ~ 6μm thick ZSM-5 zeolite membranes; especially prepared Si / Al of ZSM-5 zeolite membrane 10, breaking the situation without the use of organic templating agent under only crystallization mother liquor Si / Al ratio limit greater than 20 film-forming conditions, greatly improving the hydrophilic properties of the film, and effectively prevent the generation of aluminum-rich surfaces and intergranular space, which are not acid-resistant micro-structure. The film has excellent selectivity and acetic acid dehydration performance breakthrough in low-throughput, low selectivity and low acid-resistant organic dehydrated zeolite membrane technology bottlenecks faced, laid a solid foundation for its industrial application.

Patent Details:

DOI: C01B39 / 38 (2006.01) I