FIELD: chemistry.
SUBSTANCE: invention relates to methods for the conversion of hydrocarbon raw materials. A method for the conversion of hydrocarbon raw materials, at least 50 wt.% of which, preferably at least 80 wt.%, boils at a temperature of at least 300°C, is described, including following successive stages: at a stage a), the first deep hydroconversion of the specified hydrocarbon raw materials is optionally carried out in the presence of hydrogen, at a stage b), a light fraction is separated from part or all of a flow leaving the specified first hydroconversion to obtain at least one heavy fraction, at least 80 wt.% of which has a boiling point of at least 250°C, at a stage c), the second deep hydroconversion of part or all of the liquid flow leaving the stage a) or the heavy fraction leaving the stage b) is carried out in the presence of hydrogen, wherein the total volume hourly rate for stages a)-c) is below 0.1 h-1, where the total rate is the consumption of liquid raw materials at the stage a) of hydroconversion, reduced to standard conditions for temperature and pressure, related to the total volume of reactors of stages a) and c), wherein a hydroconversion catalyst of the stage a) and a hydroconversion catalyst of the stage c) are used in the form of extrudates or balls, a stage d) of the separation of part or all of a flow leaving the specified second hydroconversion into at least one light fraction and at least one heavy fraction, at least 80 wt.% of which has a boiling point of at least 300°C, a stage e) of the deasphalting of the specified heavy fraction obtained at the stage d), a stage f) of the conversion of part or all of the specified deasphalted DAO fraction, possibly distilled, wherein part or all of the DAO fraction is directed, preferably directly, to a conversion stage acting according to a method selected from a group consisting of hydrocracking in a fixed layer, catalytic cracking in a fluidized bed, hydroconversion in a boiling layer, wherein these methods may include preliminary hydrotreatment, wherein a catalyst of hydroconversion in the boiling layer is preferably used in the form of extrudates or balls.
EFFECT: increase in the degree of conversion of raw materials.
8 cl, 1 dwg, 25 tbl, 7 ex
