1. VHVI BASE OILS AND WHITE OILS FROM FUELS HYDROCRACKER BOTTOMS
Sook-Hyung Kwon (SK Corporation)
The 6th Annual Fuels & Lubes Asia Conference
(Jan. 25~28, 2000)

2. CONTENTS I . REFINERY OVERVIEW II. UCO TECHNOLOGY
III. 1ST UPGRADING PROJECT
IV. 2ND UPGRADING PROJECT
V. SUMMARY

3. I. REFINERY OVERVIEW MEROX G/C MEROX REFORMER U/F S/B MEROX CDU MDU
Light Naph
MEROX
Hvy-Naph
REFORMER
U/F
KERO
S/B MEROX
CDU
CRUDE
OIL
LGO
MDU AR
MTBE/
Alkylation
RHDS
RFCC
HCR
UCO
LBO
VGO
VDU
VRDS VR 1

4. II. UCO Technology Vacuum Distil’n Unit Hydro Treating Reactor Hydro
A. HCR Scheme without Lube Process
Conversion : 99.5%
Volume Increase : 115%
Pass Conversion : 60%
Vacuum
Distil’n
Unit
Hydro
Treating
Reactor
Hydro
Cracking
Reactor
Product
Frac’r
LPG
NAPH(L/N,H/N) AR
VGO
30,000B/D
+5,000
KEROSENE
DIESEL
30,000B/D EQV.
VRDS
UCO
15,000B/D
ASPHALT
5,000B/D
20,000B/D 2

5. II. UCO Technology B. Scheme with Lube Process (HCR +LBO) Vacuum
Conversion : 100wt%
Volume Increase : 115%
Pass Conversion : 60%
Vacuum
Distil’n
Unit
Hydro
Treating
Reactor
Hydro
Cracking
Reactor
Product
Frac’r
LPG AR
VGO
NAPH
35,000B/D
KEROSENE
DIESEL
10,000B/D
5,000B/D
30,000B/D EQV
20,000B/D
15,000B/D
UCO
70D
70N
Vacuum
Distil’n
Unit
Hydro
Dewaxing
Reactor
Hydro
Finishing
Reactor
Product
Frac’r
VHVI
BASE
OILS
100D
100N
150D
150N
5,000B/D 2

6. S II. UCO Technology Excess Distillates
C. Scheme Of Vacuum Distillation Unit
Excess Distillates HT HC
Recycle Oil
Surge Drum S
VGO
70D
100D
150D
UCO
Reactor
Fractionator
Unconverted Oil
Distillation
Intermediate Storage 2

7. II. UCO Technology D. Scheme Of Catalytic Dewaxing Unit S Off Gas BFW
W/W
R/G Comp.
Naphtha H P S
M/U H2
Distillate
Q/G
Q/G
LTS V S
V D
HTS
Waxy Oil
Lube Product
HDW Rx
HDF Rx
Separator
High Pressure Stripper
Vacuum Stripper 2

8. II. UCO Technology E. High Quality Base Oil from HCR BTM Properties
YUBASE lubricants advantages
Very High Viscosity Index
Less
VII
Less deposit formation
Better wear resistance
Better low temperature fluidity
Low Volatility
Lower oil consumption
Excellent Oxidation Stability
Longer oil life
YUBASE produced by the UCO lube process has many desirable properties as lube base oils over those produced by conventional processes.
YUBASE is VHVI (Very High Viscosity Index) base oil because of inherent VI being above 120. 2

9. II. UCO Technology
F. Economical in terms of Investment and Operating costs
(1) excludes Fuels Hydrocracker
(2) Includes vacuum distillation, solvent extraction, solvent de-waxing
(3) US Gulf Coast, 1998
(4) Includes utilities, chemicals, labor, depreciation, maintenance, taxes, insurance and overhead, 15% return on investment 2

10. II. UCO Technology
G. Typical Feed & Product Properties 2

11. III. 1st YUBASE UPGRADING PROJECT
A. PROJECT PURPOSE
 Lube Yield Increase
 Quality Upgrade (VI, Flash Point, Noack)
B. PROJECT SUMMARY
 Investment : 13.5Million$
 Pay-out : 1.5 Years
 Period : '96.12 ~ '97.7 (Construction : 17days, S/U: 10days)
 Dewaxing Technology : Conventional Dewaxing(CDW) Technology
 Iso-Dewaxing(IDW) Technology
Conventional Dewaxing Technology(CDW) + +
Iso-Dewaxing Technology(IDW) 2

12. III. 1st YUBASE UPGRADING PROJECT
C. EQUIPMENT MODIFICATIONS
 NEW H/E : Distillate Yield Increase
Vac. Stripper O/H Condenser, Vac. Stripper O/H Steam Generator
 NEW Pump : Distillate Yield Increase
 NEW Procedure : Catalyst Reduction, TBA Titration
 INSTRUMENT MODIFICATIONS : F/T, C/V
 Heater Relocation : Lube Quality Control
HDT Rx. Ch'g Heater  Vac. Stripper Feed Heater
 Line Remove : Old Procedure
Catalyst Reactivation Line / DMDS Injection Line
 Product Tank Construction : Lube Yield Increase
 Change of Catalyst Loading Method
Sock Loading  Dense Loading ( 19.0  20.1 Ton) 2

13. III. 1st YUBASE UPGRADING PROJECT
D. Project Result
1) Product Spec & Yield
150N Case
SPEC
IDW
CDW
REMARK
Dewaxing -
Isomerization
Cracking -
Pour Point
Max.-15°C
-15°C
-15°C - VI
Min. 125
132
121
+ 11
Flash Point
Min. 220°C
240°C
232°C
+ 8
Noack Vol
Max. 10
6.2
7.5
- 1.3
Naph. -
10.5%
33.8%
Dist’ -
4.5%
6.0%
- 1.5
Yield
Lube -
85.5%
64.5%
+ 21.0
M/U H2 -
1,900Nm3/hr
4,500Nm3/hr
- 2,600 2

14. III. 1st YUBASE UPGRADING PROJECT
2) Yield Trend
70N
100N
150N
95.0%
90.0%
CDW
85.0%
80.0%
YIELD (%)
75.0%
IDW
70.0%
65.0%
60.0% 90
180
270
360
450
540
630
720
810
900
990
OPERATION DAYS 2

15. III. 1st YUBASE UPGRADING PROJECT
3) VI & Noack Volatility Trend (150N)
110
115
120
125
130
135
140 60
180
240
300
360
420
480
540
600
660
720
780
840
900
960
1020
OPERATION DAYS VI 1 2 3 4 5 6 7 8 9 10
NOACK
NOACK wt %
CDW
IDW 2

16. III. 1st YUBASE UPGRADING PROJECT
E. VI COMPARISION
150N Case VI 75
141
132
125
IDW
CDW
VGO
HCR BTM
LBO 2

17. IV. 2nd YUBASE UPGRADING PROJECT
A. PROJECT PURPOSE
 Quality Upgrade (Aromatics Contents/ Sunlight Stability)
 Quality Upgrade (Noack Vol.)
B. PROJECT SUMMARY
 Investment : 1.6Million$
 Pay-out : 1.1 Years
 Period : '98.12 ~ '99.6
 Change of Catalyst : Ni4352 → ICR407
C. EQUIPMENT MODIFICATIONS
 Vacuum Stripper : Random Packing(Pall Ring)  Structured Packing  New Feed / HDW Reactor Effluent Exchangers Change of Configuration : 3S  1P  2S  2P  New Lube Product Cooler A New Heat Exchanger Change of Configuration : 1S  1P  1S  2P 2

18. IV. 2nd YUBASE UPGRADING PROJECT
D. Operation Condition Setting(Pilot Test)
Optimum HDF Rx. WABT

19. IV. 2nd YUBASE UPGRADING PROJECT
E. Operation Condition
150N Case

20. IV. 2nd YUBASE UPGRADING PROJECT
F. Project Results
150N Case
SPEC
Old
New
REMARK
Vac. Stripper -
Random
Structured
(Packing)
Catalyst -
Ni4352
ICR407 -
Sun Light Stability -
< 1Day
>7 Days - UV
(260~350nm)
Max. 0.5
2.35
0.26
- 2.09
Noack Vol
Max. 10
6.2
5.6
- 0.6
Naph. -
10.5%
10.5% -
Yield
Dist’ -
4.5%
3.5%
- 1.0%
Lube -
85.5%
86.5%
+ 1.0% 2

21. IV. 2nd YUBASE UPGRADING PROJECT
G. Project Results(Simplified RCS)
New
Old
HDF Rx. Temp
180C C C C C Old Old 2

22. V. SUMMARY FUELS HYDROCRACKER UCO PROJECT 1ST YUBASE UPGRADING
NAPHTHA, KEROSENE, DIESEL
UCO PROJECT
VHVI BASE OILS
UCO TECHNOLOGY
1ST YUBASE UPGRADING
VI, LUBE YIELD
UCO TECHNOLOGY + ISOMERIZATION
2ND YUBASE UPGRADING
WHITE OILS, NOACK
UCO TECHNOLOGY + ISOMERIZATION + 2