Novel low viscous, green and amphiphilic N-oxides/phenylacetic acid based Deep Eutectic Solvents
Four novel Deep Eutectic Solvents (DESs) were prepared by mixing phenylacetic acid (which is a natural molecule present in honey) with amine N-oxides, which are molecules easily biodegradable in nature. Three of these N-oxides are amphiphilic. The novel DESs have very low freezing points (from ??34?°C to 20?°C) and they have very low viscosity, much lower than the most common and used DES in literature so far (choline chloride/urea mixture). The conductivity values resulted low and the ionicity analysis showed these DESs to be “super ionic”. Their polarity resulted high enough and it can be compared with other commonly used solvents or ionic liquids.
Use of amine oxide in the H2 O2 oxidation of aliphatic mercaptan to sulfonic acid
Hydrocarbyl mercaptans are oxidized to sulfonic acids by reaction with aqueous hydrogen peroxide in the presence of an inorganic base (e.g. sodium hydroxide) and a tert-amine oxide. The product is in the form of a sulfonate salt. The reaction rate is increased and undesirable free-oil by-product is decreased by the inclusion of the amine oxide catalyst.
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(2008/06/13)
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