**4. Conclusions**

The properties and high ability of calcium oxide and tetraethoxytitanium as dehydrators for chemical binding of water and absolutization of 96% ethyl alcohol to 99.95% have been investigated. The dependence of the properties and composition of the absolute alcohol on the dehydrator nature was shown. Infrared spectroscopy, mass spectroscopy, and gas-liquid chromatography confirmed the presence of 2–2.34% of diethyl ether in ethanol, which is absolutized by freshly prepared calcium oxide. It was determined that the octane number of gasoline A-80 with the addition of 20–90% of the absolutized ethanol containing 2.34% of the combustion activator—diethyl ether—increases gasoline octane number more significantly than with the addition of the same amount of an ordinary absolute 99.95% alcohol without diethyl ether and reaches 95–97 U, whereas the octane number of gasoline with ordinary absolute ethanol reaches only 88–95 U. We confirmed literary data that the content of even very small amounts of ethers, as combustion activators, combined with the absolute ethyl alcohol leads to an improvement in the gasoline running abilities [45].
