COMPOUND FLUID CATALYTIC CRACKING METHOD FOR PRODUCING MIXTURES OF HYDROCARBONS HAVING HIGH FUEL QUALITY Russian patent published in 2013 - IPC C10G11/18 C10G69/04 C10G45/62 B01J21/12 B01J23/40 

FIELD: chemistry.

SUBSTANCE: invention relates to a compound method of converting hydrocarbon fractions originating from oil into mixtures of hydrocarbons having high fuel quality, involving the following steps: 1) conducting fluid catalytic cracking (FCC) of the hydrocarbon fraction to obtain a mixture which contains light cycle gas oil (LCG); 2) separating the mixture obtained at the last FCC step in order to extract at least one LCG fraction and a heavy cycle gas oil (HCG) fraction; 3) re-feeding at least a portion of the HCG fraction to the FCC step; 4) conducting hydrifining of the LCG fraction; 5) reacting the product obtained at step (4) with hydrogen in the presence of a catalyst system comprising: a) one or more metals selected from Pt, Pd, Ir, Ru, Rh and Re; b) acidic aluminosilicate selected from a MTW zeolite, and completely amorphous micro-mesoporous aluminosilicate, having molar ratio SiO₂/Al₂O₃ from 30 to 500, surface area greater than 500 m²/g, pore volume from 0.3 to 1.3 ml/g, average pore diameter less than 40 E, wherein the FCC step is carried out at temperature ranging from 490 to 530°C; and at the FCC step preheating temperature of the feed stream ranges from 240 to 350°C. The invention also relates to a FCC method.

EFFECT: obtaining mixtures of hydrocarbons having high fuel quality.

22 cl, 3 tbl, 2 ex