METHOD AND INTEGRATED SYSTEM FOR PREPARATION OF LOWER OLEFIN PRODUCT Russian patent published in 2015 - IPC C07C11/04 C07C11/06 C10G57/00 C10G3/00 C10G9/00 C07C1/20 C07C5/32 B01J8/00 

FIELD: chemistry.

SUBSTANCE: claimed invention relates to method of preparing olefin product, which contains ethylene and/or propylene, which includes the following stages: a) steam cracking of paraffin raw material, containing C2-C5 paraffins, is carried out under conditions of cracking, including temperature in the range from 650 to 1000°C, in zone of cracking with obtaining effluent flow of cracking installation, which contains olefins; b) oxygenate raw material is converted in oxygenate-into-olefins conversion system, containing reaction zone, in which oxygenate raw material contacts with catalyst of oxygenate conversion under conditions of oxygenate conversion, including temperature in the range from 200 to 1000°C and pressure from 0.1 kPa to 5 MPa, with obtaining effluent conversion flow, containing ethylene and/or propylene; c) at least part of effluent cracking installation flow and, at least, part of effluent conversion flow are combined with obtaining combined effluent flow with separation of olefin product flow, containing ethylene and/or propylene from combined effluent flow, where effluent cracking installation flow and/or effluent conversion flow contains C4 fraction, containing unsaturated compounds, and where claimed method additionally contains, at least, partial hydration of, at least, part of said C4 fraction with obtaining, at least, partially hydrated C4 raw material, and return of, at least, part of, at least, partially hydrated C4 raw material as returnable recirculation raw material to stage a) and/or stage b). Invention also relates to integrated system for claimed method realisation.

EFFECT: claimed objects make it possible to maximise ethylene and/or propylene obtaining.

13 cl, 5 dwg, 4 tbl, 9 ex