METHOD AND UNIT FOR OIL PRELIMINARY DISTILLATION Russian patent published in 2015 - IPC C10G7/02 C10G7/06 B01D3/14 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to the method of the preliminary oil distillation, where during oil distillation in atmosphere and vacuum rectifiers with production of the benzene and diesel fractions, atmosphere and vacuum gasoil and tar the first and second atmosphere rectifiers are equipped with semi-dead trays, that are connected by pipelines, respectively with the second atmosphere rectifier and vacuum column ensuring creation of the additional liquid refluxing.

EFFECT: reduced power consumption for the process and rational use of heavy oil fraction removed from semi-dead tray of the second atmosphere column.

3 cl, 1 dwg, 3 tbl