Ikelic - Alliance Digital Repository

OIL SANDS
timized combination of the HSC and the ROSE
(Residuum Oil Super-Critical Extraction) Process
has been developed and offered jointly by TEC
and Kerr-McGee Corporation, the licensor of the
ROSE process.
In this combination, HSC residue is further deas-
phalted by the ROSE process to recover asphal
tene free oil (DAO), which is utilized after
hydrotreating, as an additional feedstock to an
FCC or hydrocracker (Figure 2).
An innovative concept in this process combina
tion is to optimize the thermal cracking conver
sion in the HSC process and the depth of extrac
tion in the ROSE process so that the total liquid
product yield is maximized. The flexibility af
forded by the HSC process in selecting thermal
conversion levels is a prerequisite for this op
timization because optimal conversion by ther
mal cracking for most feedstocks is higher than
conventional visbreaking. Hydrotreating also
plays an important role in completing this
primary upgrading scheme.
The advantage of this system is an extra high liq
uid yield by a combination of relatively simple
and inexpensive processes.
FIGURE 2
HSC-ROSE PROCESS
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1
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Cend*n*d AtphaltenM
SOURCE: TOYO
HSC Di!ill!
OAO
Hy*o-
... taatw, ,
3-16
The residue from the HSC-ROSE process is a
condensed asphaltene with a high softening
point (R&B 200C) which Is produced as solid
flakes.
This residue is used as solid fuel in coal-fired
boilers. Due to its relatively high volatile matter
content (35-45 weight percent), combustibility is
much better than petroleum cokes from the con
ventional coking process (volatile matter content
is less than 10 weight percent).
In addition to its use as a quality fuel, the HSC-
ROSE residue is an effective coking binder for
production of high-quality cokes from low-grade
carbon materials such as non-coking coals, lig
nites and even from peats, bagasse and waste
products of the forestry industry.
Some examples of product yields from the HSC
and the HSC-ROSE process, in comparison with
conventional processes, are shown in Table 1
(next page).
Relative investment costs for each process are
also given in Table 1 for a quick comparison in
order of magnitude.
####
PRODUCTION PROBLEMS IN COLD LAKE
SHALEY OIL SANDS ANALYZED
The highly viscous bitumen from the Cold Lake
reservoir in Alberta, Canada is produced by the
Cyclic Steam Stimulation (CSS) process. The
clean oil sands of the Cold Lake reservoir
generally produce well, but the shaley oil sands
with imbedded clasts have experienced lower
bitumen production and lower steam injectivity.
A paper by T. Chakrabarty of Imperial Oil
Resources Limited and J. Longo of Exxon
Production Research Company in the December
issue of The Journal of Canadian Petroleum Tech
nology presents an analysis of the problem.
THE SYNTHETIC FUELS REPORT, JANUARY 1995