MILD HYDROCRACKING METHOD, INVOLVING DILUTION OF RAW MATERIAL Russian patent published in 2011 - IPC C10G47/00 C10G69/04 

FIELD: chemistry.

SUBSTANCE: invention relates to the technology of cracking hydrocarbon material. The invention pertains to a method of processing hydrocarbon material containing a vacuum distillate fraction or deasphalted oil or a mixture of these two fractions, in which crude oil undergoes distillation at atmospheric pressure to extract a gasoil cut and a distillation residue at atmospheric pressure; said distillation residue at atmospheric pressure undergoes vacuum distillation to extract a vacuum distillate which is taken for mild hydrocracking, and a vacuum distillation residue; deasphalted oil and asphalt are obtained through additional deasphalting of at least a portion of the vacuum distillation residue; said vacuum distillate and/or deasphalted oil, called the main raw material, undergo mild hydrocracking in the presence of hydrogen and a catalyst, as well as a lighter hydrocarbon fraction which is called secondary raw material; effluent formed from mild hydrocracking is separated in order to tap a fraction having initial boiling point higher than 320°C, which contains less than 0.25 wt % sulphur, and a fraction whose distillation interval lies between 130 and 390°C, having the following characteristics: D15/4: 0.845-0.855, sulphur content: 5-200 parts per million, by weight, cetane number: 48-52; said fraction which has initial boiling point higher than 320°C is fed into the catalytic cracking zone to obtain catalytic cracking light gasoil and heavy gasoil. The invention also relates to apparatus for realising this method.

EFFECT: obtaining gasoil with low content of sulphur, having higher cetane number.

23 cl, 3 ex, 5 tbl, 4 dwg