Cracking catalyst, preparation method thereof and application of cracking catalyst in reaction for preparing low-carbon olefin through direct conversion of waste plastics

The invention relates to the field of catalysts and the field of high polymer material recycling, and discloses a cracking catalyst, a preparation method thereof and application of the cracking catalyst in a reaction for preparing low-carbon olefin through direct conversion of waste plastics. The cracking catalyst comprises a ZRP-5 zeolite molecular sieve, an MCM-48 all-silicon mesoporous molecular sieve and a modified oxide, and on the basis of the total weight of the cracking catalyst, the content of the ZRP-5 zeolite molecular sieve is 44-68 wt%, the content of the MCM-48 all-silicon mesoporous molecular sieve is 23-55 wt%, and the content of the modified oxide is 1-9 wt%. The method not only solves the problem of waste plastic recovery, but also increases the yield of the important chemical raw material low-carbon olefin. 本发明涉及催化剂领域及高分子材料回收利用领域，公开了一种裂解催化剂及其制备方法以及在废塑料直接转化制低碳烯烃反应中的应用。所述裂解催化剂包括ZRP-5沸石分子筛、MCM-48全硅介孔分子筛和改性氧化物，且以所述裂解催化剂的总重量为基准，所述ZRP-5沸石分子筛的含量为44-68重量％，所述MCM-48全硅介孔分子筛的含量为23-55重量％，所述改性氧化物的含量为1-9重