from Wiktionary, Creative Commons Attribution/Share-Alike License
- v. To react with hydrogen as part of a chemical engineering process to remove impurities, especially as part of oil refining
Sorry, no etymologies found.
Those happened to be very hard treat sulfur compound that provides quite the required amount of extra energy and catalysts to hydrotreat the incumbent current methodology.
Well, sulfones have much higher boiling point which means that if you distill the oil now, the sulfur compounds coming a much higher boiling point region or regions of less value that are more polar and the hydrotreat easier.