The invention discloses a catalyst for manufacturing
fuel oil through
catalytic pyrolysis of mixed-waste plastics, and a preparation method thereof, and relates to catalytic thermal
cracking for manufacturing the
fuel oil through waste plastic
cracking and a second stage catalyst in thermal
cracking catalytic reforming. A first stage catalyst comprises a metallic
oxide of 2.0wt percent to 30.0wt percent and carclazyte or
montmorillonite of 70.0wt percent to 98.0wt percent; the first stage catalyst is innoxious and cheap, increases the
reaction velocity of plastic cracking, reduces the temperature in the scission reaction, improves the selectivity of
decomposition products, and is dechlorinated and transformed into innocuous substances. The second stage catalyst is composed of
ferric oxide,
molybdenum oxide,
zinc oxide,
cerium oxide, lanthana,
nickel oxide or
copper oxide, and ZSM-5, MCM-22, USY, REY, Beta or MOR molecular sieves; the second stage catalyst performs the second
catalytic pyrolysis and
isomerization and the
aromatization reversion reactions on
pyrolysis gas in the first stage, to increase the distillate rate of
pyrolysis gasoline and gas oil. The catalyst and the preparation method thereof have good selectivity, and the
raw material does not need classification, washing and
drying; the operation is flexible, and the running cost is low; the method is particularly applied to the
fuel oil manufacture through the cracking of the mixed-waste plastics in the urban and rural domestic refuse, the composition is complicated; the oil yield of the qualified fuel
oil can reach up to more than 70 percent calculated on the basis of the waste plastic.