Patent ID: 8034987

Claim:
A process for producing propylene and aromatic hydrocarbons, comprising: (1) a propylene production step wherein a hydrocarbon feedstock containing 50% by mass or more of at least one of C 4-12 olefin is brought into contact in a propylene production reactor with a molded catalyst A containing a first zeolite fulfilling conditions (i) through (iv) below to thereby perform a catalytic conversion reaction on the at least one of C 4-12 olefin, resulting in a reaction mixture containing propylene, the reaction mixture is separated into fraction C containing mainly hydrogen and C 1-3 hydrocarbons and fraction D containing mainly at least one of C 4+ hydrocarbon, and propylene is isolated from the fraction C: (i) having a medium pore diameter zeolite with a pore diameter of from 5 to 6.5 Å; (ii) containing substantially no protons; (iii) containing at least one metal selected from the group consisting of metals in Group IB of the periodic table; and (iv) having an SiO 2 /Al 2 O 3 molar ratio of at least 800 but no more than 2,000; and (2) an aromatic hydrocarbon production step wherein a raw material containing entirely or partly all or a part of the fraction D is brought into contact in an aromatic hydrocarbon production reactor with a molded catalyst B containing a second zeolite fulfilling conditions (v) through (vii) below in a gaseous phase at 650° C. or less: (v) having a medium pore diameter zeolite with a pore diameter of from 5 to 6.5 Å; (vi) with a primary particle diameter in a range of from 0.02 to 0.25 μm; and (vii) containing at least one metal element selected from the group consisting of metal elements in group IB of the periodic table.