CRUDE OILS CONTAINING NITROGEN DISPERSANTS AND ALKOXYLATED ASHLESS SURFACTANTS USABLE AS EL FUELS

摘要

Synthetic or natural crude oils having low inorganic salt and sulfur contents and which contain a polymeric dispersant and an alkoxylated ashless surfactant are useful as fuels for heavy duty diesel engines. The ashless dispersants of this invention can be characterized as having long carbon chains joined to a polar oxygen-containing or nitrogen-containing moiety. The surface active agents of this invention have a polar moiety such as an acidic or phenolic group alkoxylated with an alkylene oxide. The crude oils used in this invention have a sulfur content of 1 wt. % or less and an inorganic salt content below 3 pounds per thousand barrels of crude oil. The crude oil can be of paraffinic, asphaltic or a mixed type or a synthetic crude isolated from oil or tar sands.