The possibility of environmentally safe and energy-saving deactivation of the catalytic complex based on aluminum chloride used in the process of alkylation of benzene with olefins, oxygenate compounds – epoxy soybean oil, propylene oxide and isopentane oxidation products is shown. It has been established that the deactivating ability increases in the series: oxygenates → propylene oxide → epoxidized soybean oil (ESBO).