MULTISTAGE HYDROCRACKING METHOD FOR HYDROCONVERSION OF HYDROCARBON MATERIAL Russian patent published in 2016 - IPC C10G65/02 C10G65/10 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to a method for hydroconversion of hydrocarbon material. Method includes steps of: (a) raw material is subjected to contact at high temperature and pressure in first section of hydrocracking in presence of hydrogen with one or several catalysts for obtaining a first effluent flow of hydrocarbons; (b) dividing at least part of first effluent flow of hydrocarbons obtained at step (a), in section of separation into gaseous flow, light fluid flow and heavy fluid flow; (c) dividing at least part of said liquid flows obtained at step (b), in section of fractionation into several fractions of hydrocarbons, including hydrocarbon fraction with boiling temperature higher than 350 °C; (d) subjecting to contact at least part of fraction with boiling temperature higher than 350 °C, obtained at step (c), at high temperature and pressure in second section of hydrocracking in presence of hydrogen with one or several catalysts to obtain a second hydrocarbon output stream; (e) dividing at least part of second hydrocarbon output stream obtained at step (d), in section of separation into gaseous flow, light fluid flow and heavy fluid flow; (f) dividing at least part of said liquid flows obtained at step (e), in section fractionation into several fractions of hydrocarbons, including heavy hydrocarbon fraction with boiling temperature higher than 350 °C; (g) dividing at least part of fraction with boiling temperature higher than 350 °C, obtained at step (f), on larger and smaller stream; (h) recycling at least part of larger flow obtained at step (g) to step (d); and (i) removing smaller flow obtained at step (g).

EFFECT: using present method improves overall conversion of raw material and increases output of more valuable lightweight products.

14 cl, 1 dwg, 3 ex