PLATFORMING OF STRAIGHT-RUN NAPHTHAS FOR AROMATICS AND OCTANE IMPROVEMENT
Straight-run naphthas of Yumen, Kramayi, Central Szechuan (60-130℃), and Fushuan hydrogenated shale oil (60-120℃) were platformed separately for aromatics in an isothermal reactorcontaining 80 ml. catalyst. The catalyst used in this study was developed at the Research Institute of Petroleum Science, Ministry of Petroleum Industry. Data are presented to show platforming conditions, material balance and product distributions. Aromatic yields on weight basis were 38.5% (Yumen), 31.8% (Kramayi), 46.6% (Central Szechuan) and 32.2% (Fushun) respectively. Byproduct hydrogen yield was 1.7-2.2% (weight basis), liquid yield was 90-94% (weight basis). During 2170 hours catalyst life test, the aromatic yield decreased from 38.8% to 35.4% 80-180℃ straight-run Yumen and Kramayi gasolines for octane improvement were preliminarily investigated. At a yield of 90% (weight basis), debutanized reformed gasoline had a clear octane number of 72 (motor method). The octane number of the feed stock was 44 (motor method).