65 / 222
مجلة النفط والتعاون العربي
161
العدد
- 2017
أربعون
المجلد الثالث و ال
2016
أوابك العلمية لعام
�
ص لبحوث العلمية الفائزة بجائزة
�
عدد خا
58
48
Re-refining plants using this process are in Greece, Tunisia, California and
Germany. The Greek plant (1992) is the first KTI license with 20 thousand tons
a year capacity later raised to 40 thousand tons a year.
The Hylube Process:
1, 3, 86, 107
Fig (12) - The Hylube Process - Source 1
Fig (12). First patented by UOP in 1989 and went through many patented
developments later. In this process the settled and filtered used oil is mixed with
hot hydrogen and fed to the flash zone of a column maintained at 380 to 460
o
C.
The bottom stream of the column is the heavy un-distillable portion of the feed
while the top stream vapours are cooled to condense the undesirable heavy
components and separated as low ash fuel oil. The top stream goes to the
hydrofinishing reactor to reduce or remove other contaminants such as metals,
sulpher, nitrogen, and chlorine and oxygen compounds. If PCBs are present in
the feed, they are converted to un-harmful materials. The reactor effluent is
cooled and hydrogen is recovered in a high pressure separator and recirculated.
A low pressure separator follows where fuel gas is drawn from the top and the