Pipestill, Vacuum (VPS)

The VPS feedstock is typically the bottoms stream from the APS, but heavy streams from other conversion units are sometimes added. This unit is very similar to an atmospheric pipestill, except it operates under a vacuum, to facilitate fractionation of the heaviest part of the crude oil. The VPS produces some lighter products, gas oils, lube unit feedstocks, bunker fuel and asphalt.

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