| abstract |
A catalytic composition contains: a) 30-99.5% of at least one intergrowth molecular sieve; b) 0-20% of rare earth element or its oxide; c) 0-10% of at least one element of V A Group of the element periodic table or its oxide; d) 0-10% of at least one element of III A Group of the element periodic table or its oxide; e) 0-20% of at least one element of I B or II B Group of the element periodic table or its oxide; and f) 0-20% of at least one element of I A or II A Group of the element periodic table or its oxide; g) 0-65% of binder; in which compositions b), c), d), e) and f) are supported on composition a), and the contents of at least two of compositions b), c), d), e) and f) are great than 0. The preparation method of the catalytic composition and its application in producing olefins by catalytic cracking are also disclosed. |