| 摘要 |
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 320C, which contains less than 0.25 wt % sulphur, and a fraction whose distillation interval lies between 130 and 390C, 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 320C 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 |
