Heavy metal issues in atmospheric and vacuum distillation feedstocks
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The heavy metal content in the feedstock used for atmospheric and vacuum distillation is high; does most of these heavy metals end up in the residue after processing?
The vast majority will end up in the residue oil, while the light oil can be disregarded.
That’s likely the case: the heavier fractions contain higher levels of metals, with the majority of these metals present in residue. Solvent deasphalting can remove more than 70% of the heavy metals from residue, thereby preventing catalyst poisoning during subsequent cracking reactions