De-asphalted oil
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De-asphalted oil, DAO is a crude oil refinery process stream. It is the main stream out of a de-asphalter unit in a crude oil refinery. The other stream out from the de-asphalter is the asphalt. The de-asphalter unit is usually a solvent de-asphalter unit.
[edit] References
- Study of selected petroleum refining residuals by US EPA
- Lubricants and Lubrication (Second Edition)