A CATALYST FOR CONVERTING HYDROCARBONS

摘要

A hydrocarbon conversion catalyst, which comprises, based on the total weight of the catalyst, 1-60 wt% of a zeolite mixture, 5-99 wt% of a thermotolerant inorganic oxide and 0-70 wt% of clay, wherein said zeolite mixture comprises, based on the total weight of said zeolite mixture, 1-75 wt% of a zeolite beta modified with phosphorus and a transition metal M, 25-99 wt% of a zeolite having a MFI structure and 0-74 wt% of a large pore zeolite,
wherein the anhydrous chemical formula of the zeolite beta modified with phosphorus and the transition metal M is represented in the mass percent of the oxides as (0-0.3)Na 2 O·(0.5-10)Al 2 O 3 ·(1.3-10)P 2 O 5 ·(0.7-15)M x O y ·(64-97)SiO 2 ,
in which the transition metal M is one or more selected from the group consisting of Fe, Co, Ni, Cu, Mn, Zn and Sn; x represents the atom number of the transition metal M, and y represents a number needed for satisfying the oxidation state of the transition metal M.
The catalysts provided in the present invention have higher ability to convert petroleum hydrocarbons and higher yields for light olefins, particularly for propylene. The catalysts can be used for the selectively producing light olefins.