Process for the production of ultra-fine zeolite crystals and their aggregates

摘要

A process for producing ultra-fine zeolite nanocrystals and their aggregates having an intracrystalline void within 1~10 nanometers in size that comprises at least as follows: preparing a transparent silicate-containing aqueous solution, with optional elements as Aluminum, Titanium and organic template molecules, known to produce zeolite; heating the solution under a temperature of 25°~100° C. for a certain period of time while keeping the solution still in a transparent state without forming colloidal zeolite; adding an anionic surfactant to precipitate the inorganic components; forming the dried inorganic-organic hybrid precipitate into a desired shape and then heating the shaped body with steam under a temperature of 100°~200° C. and a relative humidity of 30~85% for 1~3 days to produce ultra-fine zeolite crystals having a size below 30 nanometers, and aggregates of ultra-fine zeolite crystals with a large number of intracrystalline voids whose size is within 1~10 nanometers.