The benefits of hydrocracking when producing feed for lubricant base stocks are well known and utilised in many plants around the world. In most cases, there is a dedicated lube hydrocracker, followed by dewaxing and finishing steps. However, the integration of a hydrocracker devoted primarily to making high-quality fuels (especially ultra-low-sulphur and low-aromatics diesel), as well as excellent feed for a dewaxing/finishing unit, is more unusual. In this dual role, Chevron Lummus Global (CLG) has exploited both process and catalyst to meet process objectives.
CLG’s first innovation