Patent ID: 7834227

Claim:
A process for converting an oxygenate feed to propylene (C 3 olefin) and a hydrocarbon feed to alkyl substituted benzene compounds comprising: reacting in a first reaction zone the oxygenate feed in the presence of a molecular sieve catalyst to convert a portion of oxygenate compounds in the oxygenate feed to a C 3 olefin; reacting in the first reaction zone the hydrocarbon feed in the presence of the molecular sieve catalyst to form C 6 + compounds; forming an effluent stream containing the C 3 olefin, C4+ olefins, the C 6 + compounds, including C6 and C7 aromatic compounds, and C8+ aromatic compound; separating a portion of the effluent stream in a separation zone into a first stream rich in the C 3 olefin, a second stream rich in C 7 , including C 7 aromatic compounds, and a third stream rich in C4+ olefins; recovering the first stream; reacting C6 aromatic compound and C8+ aromatics separated from the effluent in a second reaction zone under condition for transalkylating to form a fourth stream rich in C7 aromatics; passing the fourth stream to the first reaction zone; passing the third stream to a third reaction zone operated under the conditions to convert a portion of C4+ olefin into the C3 olefin and to form a fifth stream rich in the C3 olefin; and recycling the second stream to an inlet of the first reaction zone, thereby alkylating aromatics to generate C8 compounds.