Composition of gasolinefractions of Kumkol oil and improvement of theiroperational properties

The physicochemical properties of gasoline fractions of paraffinic oil from the Kumkol field have been investigated and the distinctive features of the individual hydrocarbon composition of the straight-run gasoline fraction and catalytic reforming gasoline have been established. The wide straight-run gasoline fraction (62-180°C) of Kumkol oil was subjected to preliminary hydrotreating at an industrial unit that is part of the catalytic reforming unit using S-12T and GO70 catalysts at a process temperature of 315 – 343°C, a pressure in the reactor of 21 – 27 atm, a volume feed rate of 6.4 – 9.4 h-1, with the circulation of HCG (Hydrogen-containing gas) «on the duct». Conditions under which catalytic reforming was carried out: temperature in the reaction zone – 470 ÷ 500°C, pressure – 28 kgf/cm2 , volumetric feed rate of raw materials – 1.5 h-1, gas circulation – 5.9 mol H2 / mol of raw materials. It has been established that in the process of reforming, as a result of isomerization of n-paraffins and dehydrogenation of cylanes, isoparaffin and aromatic hydrocarbons are intensively formed in the composition of reformant, and thereby the octane number of reforming gasoline is sharply increased. Gasoline obtained in the process of catalytic reforming from a narrow fraction of Kuikol oil meets the requirements for commercial, high-octane grades of motor fuel in all quality indicators. A significant synergistic effect has been established with the combined action of a two-component mixture compared to that for individual additives: a small concentration of the additive Hightech (manganese-containing) 18 mg/l and oxygen-containing AHA (ash-free high-octane additive) increases the octane number M.M. (motor method) by 3.3 points and according to R.M. (research method) by 5.3 points, and when introducing the additive Hitech 18 mg/l in a mixture with N-methylaniline, the increase in the O.N. (octane number) for M.M. was 4.4 units, and for R.M. (research method) – 6.