ABSTRACT
The main features of this process its dual catalyst system and its fixed-bed swingreactor concept. The first catalyst has a high capacity for metals 100 wt% of new catalyst) and is used for both hydrodemetallization (HDM) and most of the conversion. This catalyst is resistant to fouling, coking. and plugging by asphaltenes and shields the second catalyst from them. Protected from metal poisons and the deposition of coke-like products, the active second catalyst can carry out its deep hydrodesulfurization (HDS) and refining functions. Both catalyst use fixed beds that are more efflcient than moving beds and are not subject to attrition problems.
