Abstract: In response to the difficulties in blending the existing feedstock oils of SINOPEC Tahe Petrochemical Co., Ltd. to meet the China VIB standard NO.98 gasoline for motor vehicle, by controlling the feedstock properties of reformate in fractionating column of reformate and adjusting the operating conditions of two units of hydroisomerization, the blending feedstock of gasoline with optimized properties was obtained. The blending scheme of No. 98 gasoline for motor vehicle (China VIB) was designed by using optimized reformer gasoline fraction (extracting xylene), isomerized gasoline fraction and C₉+ heavy aromatic component, purchased isoctane and MTBE as blending raw materials. In this scheme, the component of the optimized unit was used as the blending raw material, without need of the reconstruction of the unit, and the blending proportion of purchased isooctane was reduced, it improved the economic benefits of enterprises and provided technical support for the optimization of product structure of the enterprise.

Key words: blending component, isomerized gasoline, octane number, C₉ heavy aromatics, blending test