Residuum / Resid

A Glossary of Petroleum Refining Terms » Residuum / Resid

General term for any refinery fraction that is left behind in a distillation.
Atmospheric resid, sometimes called long resid or atmospheric tower bottoms (ATB), is the undistilled fraction in an atmospheric pressure distillation of crude oil.
Likewise, vacuum resid, short resid, or vacuum tower bottoms (VTB), is the undistilled fraction in a vacuum distillation.
Also see Residuum Upgrading

glossary resid residuum

page revision: 2, last edited: 11 Jul 2014 07:20

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