Sub-Product

HFOs are produced from Residuals – the “leftovers” from the crude oil refining process. until the early 1970s, this primarily included the non-distillable Residuum from the Atmospheric Distillation process, for example, the fraction of Crude Oil that did not boil above 1050°F to 1100°F. Today however, most refiners also utilize Vacuum Distillation techniques that “squeeze” even more desirable, lighter products from Atmospheric Distillation residuum. The Residuum from Vacuum Distillation, often termed Flasher Bottoms, is the primary Feedstock in the current production of modern HFOs.