COMBINED PRODUCTION OF AROMATIC COMPOUNDS IN APPARATUS FOR PRODUCING PROPYLENE FROM METHANOL Russian patent published in 2012 - IPC C07C11/06 C07C15/08 C07C1/20 C07C2/66 B01J8/04 

FIELD: chemistry.

SUBSTANCE: system comprises a first a first reactor (14) an inlet, an outlet and a reaction zone, where the first reactor is capable of receiving a stream (12) of material containing oxygenates and hydrocarbons, converting a portion of the oxygenates to light olefins and alkylating aromatic compounds. The light olefins and the alkyl aromatic compounds are included in a first effluent stream (15). A separator system (18) in fluid connection with the outlet of the first reactor (14) for obtaining the first effluent stream (15) of the first reactor (14) and for forming a first product stream (20) containing a C₃ olefin, a second stream (24) containing C₇ aromatic compounds and a third stream (26) containing C₈ aromatic compounds. The system further includes a first line connecting the separator (18) to the inlet of the first reactor (14) for conveying the second stream (24) to the first reactor (14). The system includes a second line in fluid connection with the separator system (18) for conveying the C₃ olefin to a propylene recovery unit (56). The system includes a third line in fluid connection with the separator system (18) for conveying the C₈ aromatic compounds to a xylene separating unit (30) and a second reactor (40) for obtaining a stream (28 and 29) of material containing C₆ ⁺ aromatic hydrocarbons form the separator system (18) and subjecting the streams (28, 29) of material to conditions for transalkylating the C₆ ⁺ aromatic hydrocarbons to form an effluent stream (46) rich in C₈ hydrocarbons.

EFFECT: use of the present method enables to obtain xylenes together with propylene from methanol.

7 cl, 2 ex, 1 dwg