Home – Home – Jornals – Chemistry for Sustainable Development 2022 number 4

The effect of the mixtures of ethers and alcohols on the performance characteristics of motor petrol is investigated. The objects of investigation are industrially available domestic oxygenates: methyl tert -butyl ether (MTBE) and isobutyl alcohol (IBA). Investigation of the effect of the ratio of these oxygenates in the two-component mixture on the change in antiknock activity of petrol revealed a synergistic effect in the octane number within the range of the concentrations of MTBE (20 to 80 wt. %) and IBA (80 to 20 wt. %). Involvement of this two-component mixture in petrol provides an increase in the octane number. The optimal ratio of oxygenates is determined (MTBE/IBA = 50 : 50 wt. %), which provides, along with the manifestation of the synergistic effect in octane number (an increase by 7.9 units), a more uniform distribution of octane numbers over fractions and stability of performance characteristics during transportation and storage of commercial fuel. Resulting from the discovered synergism of oxygenates MTBE and IBA, a new additive to motor petrol is developed. In order to enhance and expand the range of action of the new additive based on the two-component mixture of MTBE and IBA, a formulation involving monomethylaniline (MMA) and anti-corrosion additive DCI-11 is developed. At the same time, the amount of MMA involved in motor petrol compounding did not exceed the sensitivity of the method. In comparison with the additive based on the two-component mixture, the use of the additive with an extended range of action made it possible to enhance the anti-knock characteristics (at the level of 1 octane unit, depending on the ratio) and anticorrosive properties (degree of corrosion 0 points) of petrol.