METHOD OF RECEIVING OF AROMATIC OIL Russian patent published in 2009 - IPC C10G21/00 

FIELD: oil and gas production.

SUBSTANCE: invention relates to oil processing field, particularly to processing of oil vacuum fractions. Method of aromatic oil receiving includes double-stage raw materials selective treatment- oil fractions- dissolvent with receiving of extract of the first and the second stages, solvent solution of the first stage and raffinate of the second stage and usage of solvent solution of the first stage in the capacity of raw materials for the second stage of selective treatment, extract of the second stage is additionally subject to dewaxing in solvent and contact afterpurification by adsorbent with receiving of desired product- aromatic oil, and solvent solution of the second stage is subject to additional separation in decanter with separation of light and hard phase with usage of additional cooling or water feeding, with following return of hard solvent phase of the second stage in raw materials of the first stage, and light solvent phase of the second stage is used for receiving of base lubricating oil with viscosity index not lower the 95.

EFFECT: method provides receiving of aromatic oil with improved ecological characteristics (content of "ПЦА" not higher 3,0% and carcinogenic compound less 15 mg/kg) and simultaneously basic lubricating oils of high quality and provides increasing of base product yield approximately for 3 wt %, as compared with famous technology.

3 cl, 4 tbl, 2 dwg