Preparation method of hierarchical porous ZSM-5/11 eutectic molecular sieve

The invention relates to a preparation method of a hierarchical porous ZSM-5/11 eutectic molecular sieve, which is characterized by comprising the following steps: (1) activating silicon-containing natural minerals at 400-1000 DEG C for 0.5-4 hours, adding deionized water and sodium hydroxide, and aging at 50-100 DEG C for 0.5-4 hours; (2) an aluminum source, a template agent, an alkali source and a seed crystal are sequentially added into the aged mixture, a mixture A is obtained, and the adding amount of the seed crystal is 0.5-15% of the mass of SiO2 in the silicon-containing natural mineral; (3) an organic polymer is placed in an ammonia water solution at the temperature of 50-120 DEG C to be treated for 0.5-6 h, a mixture B is obtained, the mixture A and the mixture B are stirred for 2 h and homogenized, mixed gel is obtained, and the molar ratio of H2O to Al2O3 to SiO2 to TBAB to Na2O of the mixed gel is 500-3000: 1: 10-230: 3-12: 12-160; and (4) placing the mixed gel in a closed reaction kettle, crysta