NaY zeolite containing porous material with high silicon/aluminum ratio and preparation method thereof

The invention provides a porous molecular sieve composite material and a preparation method thereof. The material is composed of bentonite, kaolin, and/or alumina (or alumina precursor). The material is characterized by being prepared through the following steps: step A, adding water into bentonite, evenly stirring to obtain slurry, adjusting the final pH value of the slurry to 2.0-5.0 by acid to carry out reactions at a temperature of 40 to 80 DEG C, filtering to remove the mother liquor, washing the filtered materials by deionized water so as to obtain modified bentonite; step B, mixing the modified bentonite obtained in the step A, kaolin, and/or alumina (or alumina precursor), adding water into the mixture, evenly stirring to obtain slurry, adjusting the final pH value to 5.0-9.0 by acid, carrying out spray-drying to obtain microspheres, burning the microspheres at a temperature of 700 to 1000 DEG C to obtain burned microspheres; step C, adding a zeolite guiding agent, water, a silicon source, a template agent, and alkali metal hydroxides into the burned microspheres obtained in the step B, then throwing the mixture into a crystallization reactor, carrying out hydrothermal crystallization for 4 to 50 hours at a temperature of 90 to 150 DEG C, filtering to remove the mother liquor, washing the filtered materials by deionized water, filtering, and drying the filtered materials so as to obtain the target product. The product has a high content of NaY zeolite and a high silicon/aluminum ratio, and is rich in micro pores and developed medium-macro pores.