METHOD OF HYDROCONVERSION RESIDUE OF ATMOSPHERIC DISTILLATION OF GAS CONDENSATE Russian patent published in 2018 - IPC C10G47/06 C10G49/04 C10G7/00 

FIELD: technological processes.

SUBSTANCE: invention relates to methods for processing heavy hydrocarbon raw materials with an extremely high content of paraffin-naphthenic hydrocarbons and a low content of native resins and asphaltenes and can be used in the processing of the residue of atmospheric distillation of gas condensate ADGC. In the method of hydroconversion of highly paraffin residue of atmospheric distillation of gas condensate before hydroconversion, the raw material is mixed with a suspension of ultrafine Mo-containing catalyst with particle sizes of 5–300 nm and a catalyst concentration of 1 % by weight (in terms of molybdenum), obtaining a homogeneous stable suspension of ultrafine catalyst in raw materials containing 0.05–0.2 % wt. catalyst (in terms of molybdenum) on the mass of raw materials. First suspension is preliminarily prepared by dispersing a catalytically active molybdenum compound in the residue of atmospheric distillation of the hydrogenate. Hydroconversion of the prepared mixture is carried out by mixing with hydrogen and hydrogenating the raw materials in a reactor with an upward flow of raw materials at a temperature of 380–450 °C and pressure of 7–10 MPa. Hydroconversion products are separated to produce a hydrogen-containing gas that is returned to hydrogenation as hydrogen from distillate fractions with a boiling point of up to 350 °C, which are derived as marketable products, and the residue of atmospheric distillation of hydrogenate with a boiling point above 350 °C. Part of the latter (stream I) is returned to the hydroconversion process and used to prepare a suspension of fresh catalyst, part (stream II) is returned to mixing with the raw material, and part (stream III) is removed from the hydroconversion process to extract and regenerate the catalyst. Preferably, an ultrafine Mo-containing catalyst promoted with nickel is used from the condition of the mass ratio Mo:Ni=(100–10):1. Amount of metals of the fresh catalyst dispersed in stream I must be equal in mass to the amount of metals discharged with stream III. Mass ratio of raw materials and flows is: raw materials: [stream I+stream II+stream III]=1:(0.25–0.8). Ratio of the mass of raw materials and stream III is 1:(0.05–0.3). Hydrocarbon portion of the residue above 350 °C of stream III after separation of the catalyst and other metals is recycled. Mass of stream I is calculated by the formula (1), where M_(I) M_(III) – the mass streams (I) and (III), respectively (the same units); C₍₃₅₀₎ – the content of catalysts (in terms of metals) in the residue of atmospheric distillation of hydrogenation, % wt. M_(I)=M_(III)C₍₃₅₀₎/(1-C₍₃₅₀₎) (1).

EFFECT: increasing the depth of conversion of raw materials, improving the sustainability of the process, simplifying the method, reducing capital and energy costs, environmental safety.

7 cl, 1 dwg, 1 tbl, 6 ex