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البحـث الثاني
153
2016
أوابك العلمية لعام
�
ص لبحوث العلمية الفائزة بجائزة
�
عدد خا
مجلة النفط والتعاون العربي
161
العدد
- 2017
أربعون
المجلد الثالث و ال
Re-refining of Used Lubricating Oil and its Economic and Environmental Implications
30
Figure 15 PROP process process flow sheet
Source: Audibert as cited in UNEP (2012)
4.9
IFP technology
IFP technology was developed by the Institut Francais du Pétrole. The principle of this
process, also known as Selectopropane process, is based on the use of propane to extract
selectively all base oil components from used lubricating oil.
4.9.1
Process description
The process comprises the following steps:
Atmospheric distillation:
First, water and light hydrocarbons are removed in the atmospheric distillation column.
Vacuum distillation:
Then, oil from atmospheric distillation is subjected to extraction with liquid propane at
a temperature of between 75 and 95ºC. Light and medium base oils are recovered in this
phase.
Hydrogenation:
In this step the vacuum distillates are hydrotreated to produce finished base oils. This is
the stage where the propane is separated from the propane-oil mixture. Asphaltic
Stripping
by air
Base Oil
Storage
Storage
Filter.
Air.
Demetallized
used oil
Flash
vessel.
Washing.
Water.
Used water
Light HC.
Washing
soda
Steam
Guard
reactors
Catalyst
reactor
H2 makeup
H2 recirc.
Stripper.
To flare.
Additive