Refiners today are finding that the increased demand for high-quality transportation
fuels is forcing them to convert a higher percentage of crude oil to lighter
products. For many, that means expanding the refinery's hydrocracking capacity
to meet more stringent product specifications. To maintain profitability, it
is essential that these quality improvements be made without sacrificing product
yield.
And that's why CLG has continued
to improve its ISOCRACKlNG technology.
| ISOCRACKING technology can improve the economics of almost any refinery scheme. |
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CLG ISOCRACKING is the
most flexible upgrade path to lighter products - a
path that can help you reach a balance between stringent product specifications,
product yield, cycle run length, capital investment and operating costs. That's
because CLG ISOCRACKlNG
offers you flexibility in the choices of crude oil
to buy, the products you can produce, the operating efficiency you can achieve,
and ultimately, the profitability you can realize.
Around the world, a 50 ppm
specification for sulfur in gasoline and diesel
will likely move to even lower levels in the future.
CLG's experience with
ISOCRACKING in the highly regulated California fuels market makes it easy for
refiners to produce clean fuels from different feeds.
ISOCRACKING technology can improve the economics of almost any refinery scheme.
We offer designs for all types of configurations, including:
- Single-Stage Once-Through (SSOT)
- Single-Stage Recycle (SSREC)
- Two-Stage Recycle (TSR)
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CLG's ISOCRACKING
SSOT
configuration produces feedstocks with superior characteristics
for FCC feeds,
high VI lubes or
ethylene plant feeds. Our latest development
for SSOT
employs a moderately high-pressure design in conjunction with a tailored
catalyst system that provides unsurpassed hydrodenitrification and high hydrocracking
activity.
This moderate pressure hydrocracking requires a lower initial investment while
providing refiners with the opportunity to economically revamp the unit for
higher conversion, higher throughput, more difficult feeds and/or more stringent
product quality specifications at a later date.
The SSREC configuration
is used for very high conversion processing of light
feeds and, for low capacity units, processing heavy feeds at low feed rates.
Increased yields and flexibility: The ISOCRACKING Two-Stage
Recycle process is optimized for maximum yields of premium products with minimum
hydrogen consumption. The first stage removes feed impurities and converts
20-50% of the feed. The second stage cracks the cleaned feed at lower temperatures.
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CLG's
TSR reactor
configuration enables refiners to handle a wider range of
feeds and feed rates. The benefits of the
TSR are, it:
- separates catalyst functions for maximum effectiveness
- affords complete conversion of gas oil to products
- provides maximum recycle cut-point flexibility
- provides maximum yield of middle distillates
- produces high-quality kerosene and diesel fuels
- produces a heavy naphtha product that is excellent reformer feed
- is most effective for higher capacity plants
Reverse Stage ISOCRACKING was the next logical step in the continuing development
of the Two-Stage Process. Reverse Stage ISOCRACKING uses the second stage effluent
as the inlet gas for the first stage.
It results in:
- lower capital investment
- lower operating costs
Revamp for better products and better performance
The conventional approach to revamping an existing
SSOT unit is to add additional
reactor volume downstream or to add a "saturation reactor" to improve
the quality of one or more products.
CLG's solution, Optimized
Partial Conversion (OPC)
ISOCRACKING, is less expensive
and more flexible than the conventional methods. Using the Reverse Stage ISOCRACKING
technology, the SSOT is
converted to a partial or full recycle Two-Stage configuration
by the addition of a small reactor upstream of the existing reactor.
The original single or "first stage" reactor effluent system removes
organic nitrogen and other catalyst poisons, so that a portion of the fractionator
bottoms can be recycled to the new "clean" second stage reactor.
This produces high conversion to very high-quality products at less investment.
CLG's cost effective revamp solution achieves very high-quality products by adding a small reactor upstream. |
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