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البحـث الثاني
163
2016
أوابك العلمية لعام
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ص لبحوث العلمية الفائزة بجائزة
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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
40
4.16 RTI technology
This technology is based on the Vacuum Cyclone Distillation/Clay Treatment technical
principle. This process also enables plants that are based on acid/earth technologies to
be transformed to RTI technology.
4.16.1
Process description
The basic steps of the process are as follows:
Separation:
In this step the used oil is dehydrated and heated
Flash/Vacuum distillation:
Water and light hydrocarbons are removed
Earth treatment: In this step, the feed is treated with activated clay to improve the
properties.
Vacuum distillation:
In this stage the additives and pollutants that are still in the used oil fraction are
separated. Waste oil is dewatered, heated and flashed and then distilled for water and
light hydrocarbons removal.
Figure 23 illustrates a simplified block flow diagram.
4.16.2
Process features and drawbacks
It is claimed that cyclonic distillation decreases coke formation and, as a result, reduces
fouling of the equipment and increases the stream factor. Oily clay residue is disposed
of in landfill while vacuum tower bottoms can be used in asphalt industry.
The quality of the product is not very high, because technology uses clay treatment but
not hydrofinishing.