The atmospheric residuum desulfurization (RDS) and vacuum residuum desulfurization (VRDS) technologies target residue desulfurization to produce low sulfur fuel oil or feedstock for residuum FCC units. The RDS and VRDS technologies are often complemented with an Upflow Reactor (UFR®) or On-stream Catalyst Replacement (OCR®) unit to extend catalyst run length.
Residuum hydrocracking involves high conversion of residua utilizing the LC-FINING™, LCMAX® or LC-SLURRY processes. Residue hydrocracking feedstock can be straight-run residua or residue from a solvent deasphalting (SDA) unit. Products from residue hydrocracking require use of ISOCRACKING® or ISOTREATING® technology to meet final specifications. Unconverted oil from residue hydrocracking can be sent to the delayed coking unit, sold as fuel oil, or used as feed to gasifiers or boilers.