| abstract |
The present invention is a nanoscale multi-level porous MOR/MTW eutectic molecular sieve and its preparation method and application. The eutectic molecular sieve contains 1.0% to 99.99% of MTW structure molecular sieves, and the rest is MOR structure molecular sieves; nanoscale multilevel pore eutectic molecular sieve The atomic ratio of Si/Al in the medium is 1-7000:1; the particle size of nano-hierarchical MOR/MTW molecular sieve is 20-1000nm; the value of mesopore volume/micropore volume in nano-hierarchical MOR/MTW eutectic molecular sieve is about 1.0 ~10.0:1. In the present invention, the MOR molecular sieve solution is firstly prepared by utilizing the ordered synthesis method, and then mixed with silicon source, aluminum source, water, templating agent, surfactant, etc., and crystallized at 110-200°C for 0.5-100°C. Days, after washing, drying, roasting and other steps, the MOR/MTW eutectic molecular sieve containing nano-hierarchical pores was obtained. The preparation method of the present invention overcomes the problem that the prior art cannot prepare and provide nanometer multi-level porous MOR/MTW eutectic molecular sieves, and the eutectic molecular sieves have a wide range of catalysis, adsorption and separation in the fields of fine chemical industry, coal chemical industry, petrochemical industry, etc. application prospects. |