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S-OIL Base Oil

Manufacturing Process

S-OIL Lube Base Stock Manufacturing Process

·Refined from petroleum crude oil.
·Synthesized from relatively pure compounds with properties that are suitable for lubricants.

Group I Base Oil Process

·Vacuum Distillation Process ·Purification Process ·Dewaxing Process ·Hydrofinishing

S-OIL Group II and III Lube Base Stock Manufacturing Process Diagram

S-OIL Group III aramcoULTRA Process

VDU: vacuum distillation unit	VGO: vacuum gas oil	HYC: hydrocracking
WAX ISOM: wax isomerization	HDF: hydrofinishing	SDA: solvent deasphalting
DAO: deasphalted oil	HDT: hydrotreating	MEK DWX: MEK dewaxing
CAT DWX: catalytic dewaxing

What happens during each process
Item	VGO	After hydro cracking	After hydro isomerization	After hydro finishing
Saturates	40-60%	＜10%	＜2%	＜1%
Sulfur	2-3%	＜10ppm	＜5ppm	＜1ppm
VI	70-85	＞130	＞120	120 - 130
Pour point Degrees	+25 - +50	+30 - +40	＜-15.0	-22.5 - -15
Color	L3.0 - L4.0	L0.5 - L2.0	+20	+30

S-OIL Group II Base Oil Process

Aramco Prima series base oil utilizes ExxonMobil’s MSDW TM catalytic dewaxing and hydrofinishing process effectively combined with Gulf’s hydrotreating process .

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