SDA in the Oil and Gas IndustryPowered by COBUILD (ɛs di eɪ) or solvent deasphalting
(Extractive engineering: Refinery processes, Product) SDA is a process for extracting asphaltenes (= molecular substances in crude oil) and resins. ⇒ SDA used a selective solvent or solvent mixture for the low-pressure extraction of asphaltenes, heavy resins, and heteroatoms. ⇒ SDA was originally developed as a means of removing asphaltenes from lubricating oil feedstock. ⇒ SDA is a process for extracting asphaltenes and resins.