| 摘要 |
By cumulation of multicore aromatic compounds in the unit for catalytic hydrocracking with this method of catalytic hydrocracking, which includes introduction of the distillation residue from the fractioning of petroleum in the vacuum fractioning zone with the occurrence of a fraction of vacuum gaseous oil containing compounds having a tendency to form harmful multicore aromatic compounds in the fractioning zone with fed hydrogen and a hydrocracking catalyst, which is promoted by metal, with increase temperature and pressure sufficient to ensure fundamental conversion to low-boiling products, whereas the occurring trace amount of multicore aromatic compounds and partial condensation of the hydrocarbon flow arising from the hydrocracking zone and its separation into a flow of the low-boiling product and flow containing unconverted hydrocarbon boiling at above about 343 degrees C and multicore aromatic compounds, preventing the possibility that at least part of the flow containing unconverted hydrocarbon and multicore aromatic compounds are introduced in the vacuum fractioning zone, whereas the essential part of the multicore aromatic compounds are acquired in the adjacent inter-fraction of vacuum distillate, which has a boiling temperature of 90 % above 565 degrees C and concentration of asphaltenes above 0.5 % by weight.
|
