Miscibility, corrosion and environmental properties of six hexanoate- and sulfonate-based protic ionic liquids

In this work, six different types of protic ionic liquids (PILs) have been studied. For all these PILs, the bacteria toxicity and environmental biodegradability investigated, as well their corrosive behavior miscibility in lubricating base oils. The PILs studied showed poor to moderate (BOD5/COD from 0.072 ± 0.002 0.18 0.01) slight (TU values between 1.18 0.04 2.7 0.1). However, properties are much better than those obtained for reference lubricant additive used industry (ZDDP). addition, five did not show activity on steel. Only one some an ester a oil rest mixtures were highly unstable.