152 / 222
البحـث الثاني
145
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
22
Figure 10 CEP simplfied process flow diagram
source: CEP
4.4
UOP Hylube process
4.4.1 Process description
This technology was designed by UOP in 1995. This process which operates on
continuous basis is made up of the following stages:
Pretreatment:
The feedstock is first filtered to remove solids and then mixed with hot hydrogen in a
pressurized mixing chamber. The heat mixture is sent to flash separator where the
bottoms are routed to a residue stripper.
Hydroprocessing:
In the multi-stage high-pressure system, the gaseous hydrocarbon materials are initially
separated from the residual impurities and metal compounds (guard reactor), and then
processed through a severe hydofinishing reactor. Using patented hydrogenation
catalysts, a deep saturation of olefins and aromatics is achieved (conversion reactor),
2nd reactor
3rd reactor
1st reactor
Recycle gas
Heavy base oil
Waste Oil
Wáter and light
Hydrocarbons
Gas Oil
Light base
oil
Fractionati
o
Wiped film
Evaporator