Russian Journal of Applied Chemistry. Vol. 95, No. 6, Pages 887-892, 2022

A. V. Kameshkov^a, A. A. Gaile^b^,*, A. A. Shchepalov^c, and A. R. Vorob’eva^b

^aKirishinefteorgsintez Production Association, Kirishi, Leningrad oblast, 187110 Russia

^bSt. Petersburg State Institute of Technology (Technical University), St. Petersburg, 190013 Russia

^cManaging Company of Orgkhim Biochemical Holding, Nizhny Novgorod, 603950 Russia

Abstract— Four-step countercurrent extraction treatment of heavy gasoil from the delayed coker of Gazpromneft–Omsk Oil Refinery with N-methylpyrrolidone containing 2 wt % water and one-step extraction treatment of the obtained extract to remove carcinogenic aromatic hydrocarbons with an 80 : 20 wt % N-methylpyrrolidone–ethylene glycol mixture in the presence of a nonpolar solvent, heptane, were studied. The content of carcinogenic polycyclic arenes was reduced by two orders of magnitude by multistep extraction at the N-methylpyrrolidone : feed weight ratio of 0.4 : 1. The raffinate obtained can serve as a component of a rubber stock plasticizer.

Keywords: delayed coker heavy gasoil, extraction, carcinogenic polycyclic arenes, N-methylpyrrolidone

Preparation of a Component of a Rubber Stock Plasticizer by Extraction Treatment of Delayed Coker Heavy Gasoil with N-Methylpyrrolidone