Catalytic composition for producing olefins by catalytic cracking

摘要

A catalyst composition comprising on weight basis the following components: a) 30 to 99.5% of at least one intergrowth molecular sieve; b) 0 to 20% of a rare earth element or oxides thereof; c) 0 to 10% of at least one element from Group VA of the Periodic Table or oxides thereof; d) 0 to 10% of at least one element from Group IIIA of the Periodic Table or oxides thereof; e) 0 to 20% of at least one element from Group IB or IIB of the Periodic Table or oxides thereof; f) 0 to 20% of at least one element from Group IA or IIA of the Periodic Table or oxides thereof; and g) 0 to 65% of a binder, wherein the components b), c), d), e) and f) are supported on the component a), and contents of at least two of the components b), c), d), e) and f) are larger than zero, is described. A process for preparing said catalyst composition and a process for the production of olefins via catalytic cracking by using said catalyst composition are also described.

主权项

1. A process for the production of olefins via catalytic cracking, comprising
i) converting a cracking feedstock to an effluent comprising ethylene and propylene in the presence of a catalyst composition; and ii) isolating ethylene and propylene from the effluent obtained from i), wherein the catalyst composition comprises, on weight basis relative to the total weight of the catalyst composition, the following components: a) 30 to 99.5% of at least one intergrowth molecular sieve chosen from intergrowth molecular sieves of at least two of ZSM-5, mordenite, β zeolite, Y zeolite, MCM-22, analcite, MCM-49, MCM-48, MCM-56, ZSM-23, and Magadiite molecular sieve; b) 0 to 20% of at least one rare earth element or oxides thereof; c) 0 to 10% of at least one element from Group VA of the Periodic Table or oxides thereof; d) 0 to 10% of at least one element from Group IIIA of the Periodic Table or oxides thereof; e) 0 to 20% of at least one element from Group IB or IIB of the Periodic Table or oxides thereof; f) 0 to 20% of at least one element from Group IA or IIA of the Periodic Table or oxides thereof; and g)0 to 65% of at least one binder, wherein the components b), c), d), e) and f) are supported on the component a), and contents of at least two of the components b), c), d), e) and f) are larger than zero, and further wherein the at least one intergrowth molecular sieve is prepared by mixing a silicon source, an aluminum source, an optional templating agent and water, and allowing the mixture to crystallize under hydrothermal conditions and, optionally, in the presence of suitable crystal seeds.