| abstract |
A kind of cracking catalyst containing a rare earth Y type zeolite and a carrier, wherein the rare earth Y type zeolite, RE 2 O 3 calculations to 4-15% by weight as an oxide having a rare earth content in the crystal lattice, The initial unit cell size is 2.440 to 2.465 nm. After aging the catalyst under severe conditions of 100% steam for 17 hours at 800 ° C., an equilibrium unit cell size constant greater than 2.435 nm is obtained. A rare earth element is present on a simple substance, and its content is 1.0 to 8.0% by weight based on the weight of the carrier. The invention also relates to a process for preparing the catalyst. |