METHOD OF PRODUCING NON-CARCINOGENIC AROMATIC PROCESS OIL Russian patent published in 2014 - IPC C10G21/12 C10G21/16 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing non-carcinogenic aromatic process oil containing less than 3.0% of an extract of polycyclic aromatic hydrocarbons according to the IP-346 method, which involves purifying petroleum oil fractions with selective solvents and separating the extract of selective purification of the oil, further treatment of the extract with a polar solvent and obtaining a raffinate as the desired product. The polar solvent used is propylene carbonate which is used to treat the raw material, wherein the raw material is a mixture of the extract from selective purification of oil obtained at the oil fraction purification step and a recycling raffinate solution obtained at the further treatment step; the raffinate solution obtained from further treatment is partially fed for mixing with the extract from selective purification of oil; the balance amount of the raffinate solution is fed to a step for regenerating solvent from the raffinate solution, and the extract solution obtained at the further treatment step is fed to a step for regenerating solvent from the extract solution. The ratio of the raw material to the polar solvent at the further treatment step is in the range of (0.67-0.2):1; temperature at the top of the extractor is in the range of 100-210°C and temperature at the bottom of the extractor is in the range of 85-200°C.

EFFECT: obtaining non-carcinogenic aromatic process oil with high selectivity, high efficiency of the method and easy regeneration of the extractant from the raffinate solution.

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