At CLG, improving efficiency in residuum hydroprocessing is nothing new. Tightening environmental regulations and the harsh economic realities of processing difficult feeds led Chevron to invest millions of dollars in the further development of technology and catalysts that could maximize returns from the bottom-of-the-barrel. Chevron introduced its fixed bed technology, residuum hydrotreating nearly 50 years ago. More than 30 years ago, Lummus (now part of CB&I) developed its ebullating bed technology, LC-FINING. Today, CLG offers both RDS and LC-FINING processes for residuum hydroprocessing. Using CLG technologies, refiners achieve greater conversion to lighter products and have fewer feed-related operating problems while processing heavier feeds.

Both CLG's RDS and LC-FINING processes provide deep removal of sulfur, nitrogen and metals, and hydrocarbon upgrading (cracking and hydrogen input) for maximum conversion of atmospheric/vacuum residue feedstocks to light clean products.

RDS is preferred where hydrogen input and deep removal of sulfur, nitrogen and metals are the primary objectives. RDS is well suited to pretreat Residuum Fluid Catalytic Cracking (RFCC) feedstocks.

LC-FINING is preferred where hydrocracking and deep removal of sulfur, nitrogen and metals are the primary objectives. LC-FINING is well suited to extra-heavy residue, bitumen and vacuum residue feedstocks, and has demonstrated long cycle lengths (approximately four years) between turnarounds.

Since 1985, over 90 percent of the refiners who want to optimize downstream conversion from difficult feeds have chosen CLG technology because of its superior economics. CLG offers its licensees a level of residuum hydroprocessing experience and expertise that few, if any, other companies can match. We share this expertise with our customers through active research and development programs, extensive pilot plant facilities and a full range of support services.

A clear upgrade path

One of the greatest challenges facing refiners is determining how to improve product quality from difficult feeds while minimizing risk and expense. There are no easy solutions. Invariably, the consideration includes an analysis of investment versus expected return from the desired product slate. To maintain profitability, it is essential that these improvements be made without compromising product yield. When processing heavy, sour feeds, refiners require an extended level of performance and flexibility from their residuum hydroprocessing unit. That's why CLG has continued to invest in technologies for residue conversion.

Today, we offer a family of residuum conversion technologies and catalysts that can be tailored to help refiners optimize product quality, product yield, run length, capital investment and operating costs.

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