METHOD FOR SEPARATION OF AT LEAST ONE OLIGOMERISED OUTPUT FLOW Russian patent published in 2016 - IPC C07C7/04 C10G50/00 C07C2/06 

FIELD: chemistry.

SUBSTANCE: invention relates to method for separation of at least one oligomerised output flow. Method includes the following stages at which: A) water-washed raw material flow, containing water and C₃ and C₄ hydrocarbons, is divided into flow, containing water and C₃ hydrocarbons and flow, containing C₄ hydrocarbons; B) said flow, containing water and C₃ hydrocarbons, is dried in drier to remove water and obtain water-depleted flow, containing C₃ hydrocarbons; C) said water-depleted flow, containing C₃ hydrocarbons, is introduced into first zone of liquid-phase oligomerisation to obtain first output flow, containing C₉ hydrocarbons, C₁₂ hydrocarbons, or their combination; D) said flow, containing C₄ hydrocarbons, is introduced into second zone of liquid-phase oligomerisation to obtain second output flow, containing C₈ hydrocarbons, C₁₂ hydrocarbons, or their combination, with recirculating flow of C₈₊ hydrocarbons being introduced into second zone of liquid-phase oligomerisation; E) at least part of said first output flow and/or said second output flow is supplied into separation zone; and F) at least one flow from said separation zone is supplied into hydroprocessing zone.

EFFECT: application of the claimed invention makes it possible to produce high-quality high-octane gasoline in rational and effective way.

10 cl, 4 dwg