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Physico-chemical properties of diesel fuel with a content of 1-5% dehydrated (99.5%) and watered (93%) nbutanol were studied. To obtain homogeneous mixtures, a rotary-type mixer was used at temperatures of 0-25° C. It found that the stability of diesel fuel containing 3% mass. dehydrated n-butanol at a room temperature is 60 days. An increase in the content of n-butanol to 5% leads to a decrease in the stability of the prepared mixture up to 45 days. Stability of the diesel fuel mixture with 3% 93% n-butanol is 5 days at normal, and not more than 3 days at a temperature of 0 ° C. Adding to this mixture a 1% emulsifier obtained on the basis of propylene oxide esters with petroleum acids makes it possible to obtain homogeneous diesel fuel while preserving all its physicochemical properties. In addition, it was found that when this mixture is burned, the content of toxic gases, such as carbon oxides, nitrogen and sulfur, in the exhaust gas composition decreases by 24%, 16% and 12%, respectively as compared to the burning of butanol-free diesel fuel.

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