|
Middle
pressure hydrocracking
The
low investment and operation costs make the middle
pressure hydrocracking more attractive to the refiners. In
some special cases, especially when the refiners have
existed high pressure hydrocrackers or some similar units,
it can also make profits for refiners.
FRIPP,
SINOPEC began the R&D of middle pressure hydrocracking
in 1970s, and put it into commercial use in Jingmen
Refinery in 1987. Bellowing list the results of middle
pressure hydrocracking of several typical feeds. The data
illustrated that the diesel products were good quality and
complied with the EURO-III, naphtha products were good
feeds of reformers, kerosene distillates were qualified
jet fuels blending components, and unconverted oil were
good feeds of steam crackers for ethylene production.
Results
of middle pressure hydrocracking with typical feeds
|
Feed |
Iranian
light VGO |
Saudi
middle VGO |
Daqing
VGO |
|
Boiling
range/℃ |
329～543 |
314～527 |
253～491 |
|
Hydrogen
partial pressure/MPa |
10.0 |
10.0 |
8.0 |
|
370℃＋
Per
pass conversion/m% |
80 |
80 |
55 |
|
Product
qualities |
|
|
Heavy
naphtha,
aromatics potential/m% |
61.5 |
62.33 |
53.0 |
|
Jet
fuels, smoke
point/mm |
23 |
25 |
- |
|
Aromatics/v% |
3.3 |
15.8 |
- |
|
Diesel,
S/N/μg/g |
<10/<1 |
<10/<1 |
<50/<5 |
|
Density/g/cm3 |
0.8217 |
0.8249 |
0.8103 |
|
Cetane
number |
64 |
59.2 |
54.8 |
|
Unconverted
oil, BMCI |
10.3 |
10.2 |
8.7 |
|
