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أوابك العلمية لعام
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ص لبحوث العلمية الفائزة بجائزة
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عدد خا
مجلة النفط والتعاون العربي
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العدد
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أربعون
المجلد الثالث و ال
Re-refining of Used Lubricating Oil and its Economic and Environmental Implications
19
Finally, the re-refined base oil is separated into different oil grades: Light viscosity
lubricants suitable for general lubricant applications, low viscosity lubricants for
automotive and industrial applications and high viscosity lubricants for heavy duty
applications (Fernatt, 2013).
The process main steps are outlined in Figure 8.
4.1.2 Process features and drawbacks
It is claimed that the base oils recovered by this process meet API standards for base
oils. Lubricants made from Safety Kleen base stock include engine oils, gear lubricants,
power transmission fluids, hydraulic oils, and industrial oils, all of which meet industry
standards and specifications and therefore do not jeopardize warranties or the
performance of equipment (UNEP, 2012).
Figure 8 Safety Kleen simplified process flow diagram
Source: Fernatt (2013)
Distillate
Asphalt
H2O
Vacuum
Distillation
Fuel Stripper
Dehydration
Unit
hydrotreater
Vacuum
Fractionation
Fuel
Used Oil
Vacuum
Oil
Base oil cut 70
Base oil cut 240